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CN107178006B - A kind of preparation method of resistant to dissolution type oil-water separation filter paper - Google Patents

A kind of preparation method of resistant to dissolution type oil-water separation filter paper Download PDF

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CN107178006B
CN107178006B CN201710520010.1A CN201710520010A CN107178006B CN 107178006 B CN107178006 B CN 107178006B CN 201710520010 A CN201710520010 A CN 201710520010A CN 107178006 B CN107178006 B CN 107178006B
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filter paper
water separation
fiber
oil
separation filter
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CN107178006A (en
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叶娟
季美
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Mingguan Purification Materials Zhejiang Co ltd
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SHANGHAI MINGGUAN PURIFICATION MATERIALS Co Ltd
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/08—Filter paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

本发明属于油水分离技术领域，具体涉及一种耐溶解型油水分离滤纸的制备方法。本发明通过铁氰化钾为原料，经水热反应，将铁离子负载至酶解处理的纤维表面，由于纤维表面酶解处理后，木聚糖酶破坏纸浆纤维表面的细胞壁，降解纸浆纤维中的半纤维素，使得纤维细胞壁变得疏松，在高速搅拌条件下，氢氧化铁颗粒均匀纤维细胞内部，使纤维制备的滤纸材料具有优异的耐溶胀性能，改善滤纸在油溶剂中的耐溶解性能，本发明通过氢氧化铁氧化形成氧化铁材料，均匀包覆和填充纤维表面，再经低表面能处理，使滤纸表面形成疏水结构的包覆覆盖层，有效改善滤纸材料的油水分离性能，使滤纸材料耐溶剂油的渗透和耐溶解性大大增强。The invention belongs to the technical field of oil-water separation, and in particular relates to a preparation method of a dissolution-resistant oil-water separation filter paper. In the present invention, potassium ferricyanide is used as a raw material, and iron ions are loaded onto the fiber surface treated by enzymolysis through hydrothermal reaction. After the fiber surface is treated by enzymolysis, xylanase destroys the cell wall on the pulp fiber surface and degrades the pulp fiber. The hemicellulose makes the fiber cell wall loose. Under the condition of high-speed stirring, the ferric hydroxide particles are uniform inside the fiber cells, so that the filter paper material made of fiber has excellent swelling resistance and improves the dissolution resistance of the filter paper in oil solvents. , the present invention oxidizes iron hydroxide to form iron oxide material, evenly coats and fills the fiber surface, and then treats the surface of the filter paper with a low surface energy to form a coating covering layer with a hydrophobic structure, effectively improving the oil-water separation performance of the filter paper material, making The filter paper material has greatly enhanced resistance to solvent oil penetration and dissolution.

Description

A kind of preparation method of resistant to dissolution type oil-water separation filter paper
Technical field
The invention belongs to oily water separation technique fields, and in particular to a kind of preparation side of resistant to dissolution type oil-water separation filter paper Method.
Background technology
So far with modern social development, oils and organic solvent are gradually increasing the pollution problem of water resource.It is past Toward after occurring in pollution, people can generally be placed obstacles using oil fence etc., then blocking oil product diffusion uses zeolite, work Property traditional sorbing material removal seawater such as charcoal, sponge in oil contaminants.But this method have the shortcomings that it is inevitable, For example, grease adsorbs together, to be difficult to recycle oil product, adsorption ratio low etc..Therefore, exploitation has high oil absorption selectivity, high oil absorption ratio The new function water-oil separating material of rate becomes the project of an imperative and great challenge.
So far, it is studied in water-oil separating and surely belongs to super-hydrophobic/super-oleophilic functional material with the most of application and earliest. Super-hydrophobic/super-oleophilic material refers to that the contact angle between material surface and water droplet is more than 150 ° and the contact angle of oil droplet is close 0 ° of material.And it is existing existing water-oil separating material generally uses polymer or inorganic, metal oxide to be made first, Polymer is easy swelling or dissolving, influences materials'use service life and separating property in oil-based liquid, so, it prepares a kind of Separation material with excellent separating capacity and effective solvent resistant solubility property is necessary.
Invention content
Present invention mainly solves the technical issues of：Occur easily in oil-based liquid for existing water-oil separating material swelling or Person is dissolved, and is influenced the defect of materials'use service life and separating property, is provided a kind of preparation of resistant to dissolution type oil-water separation filter paper Method.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
（1）In mass ratio 1:2, straw and reed are placed in pulverizer and crushes and sieves with 100 mesh sieve, obtains mixed-powder, is pressed Mass ratio 1:5,5~10h of boiling after mixed-powder is mixed with sodium sulfite solution, release simultaneously stop heating, and standing is cooled to Room temperature obtains primary filament slurries；
（2）It is 5% by primary filament slurries pulp washing to concentration of slurry, obtains screen fibre slurries, zytase is added to In screen fibre slurries, fiber slurry pH to 8.0 is adjusted, is stirred and heating water bath, standing is cooled to room temperature, fibre must be digested Tie up slurries；
（3）In mass ratio 1:10, by the potassium ferricyanide be added to enzymolysis fiber slurry in, be stirred mixed liquor is placed in In stainless steel cauldron, after insulation reaction, cooled to room temperature filters to obtain filter cake, dry modified fibre；
（4）In mass ratio 1:5, modified fibre and softwood pulp are stirred and are placed in beater, mashing is handled Copy paper slurry, is placed in pattern by copy paper slurry and copies and take in device progress copy paper processing, then after paper hot-pressing processing, standing is cooled to Room temperature obtains filter paper matrix；
（5）In mass ratio 1:10, stearic acid is added in n-hexane, modification liquid is stirred to obtain, filter paper matrix is soaked In bubble to modification liquid, after immersion treatment, washing, drying, you can be prepared into a kind of resistant to dissolution type oil-water separation filter paper.
Step（1）The boiling is 5~10h of boiling at 0.5~0.8MPa, 160~170 DEG C.
Step（2）The zytase additive amount is 20U/g.
Step（3）Mixing speed is 3200~3300r/min during the insulation reaction.
Step（4）The softwood pulp is the softwood pulp of 15 ° of SR of beating degree.
Step（4）The quantification of 110g/m of the copy paper2。
The beneficial effects of the invention are as follows：
（1）The present invention is that iron ion is loaded to the fiber of enzymolysis processing by raw material by hydro-thermal reaction by the potassium ferricyanide Surface, after fiber surface enzymolysis processing, zytase destroys the cell wall of pulp fiber surface, in paper pulp fiber of degrading Hemicellulose so that fiber finer cell wall becomes loose, then under the conditions of high-speed stirred, the uniform wadding warp enzymolysis of iron hydroxide particle It inside the fibrocyte of processing, is effectively loaded in fibrous inside and surface, so that filter paper material prepared by fiber is had excellent Different resistance to swelling energy improves dissolubility resistent energy of the filter paper in oil solvent；
（2）The present invention aoxidizes to form iron oxide material by iron hydroxide, uniformly cladding and fiberfill fibers surface, then through low Surface energy treatments make surface form the cladding coating of hydrophobic structure, are effectively improved the water-oil separating performance of filter paper material, Simultaneously low-surface-energy processing, coating modification filter paper material surface, make filter paper material solvent resistant oil infiltration and dissolubility resistent significantly Enhancing.
Specific implementation mode
In mass ratio 1:2, straw and reed are placed in pulverizer and crushes and sieves with 100 mesh sieve, obtains mixed-powder, by quality Than 1:5, be placed in after mixed-powder is mixed with 12% sodium sulfite solution of mass fraction 0.5~0.8MPa, 160~170 DEG C 5~10h of lower boiling, subsequent release simultaneously stop heating, and standing is cooled to room temperature, and is prepared into primary filament slurries；By primary filament Slurries are placed in wash engine after pulp washing to concentration of slurry is 5%, are collected to obtain screen fibre slurries, are pressed 20U/g enzyme dosages, wood is gathered Carbohydrase is added in screen fibre slurries, adjusts fiber slurry pH to 8.0 with 8% sodium hydroxide solution of mass fraction, stirring is mixed Merging is placed in 1~2h of heating water bath, standing at 45~55 DEG C and is cooled to room temperature, and obtains enzymolysis fiber slurry, in mass ratio 1:10, it will The potassium ferricyanide is added in enzymolysis fiber slurry, after being stirred 25~30min at 250~300r/min, 45~50 DEG C, is obtained Mixed liquor is placed in stainless steel cauldron, 40~48h of insulation reaction at 145~150 DEG C, and control reaction mixing speed is 3200~3300r/min, after the completion of waiting for insulation reaction, cooled to room temperature filters to obtain filter cake, dry 6 at 75~80 DEG C After~8h, modified fibre, in mass ratio 1 are obtained:5, modified fibre and 15 ° of SR softwood pulps of beating degree are stirred to be placed in and beaten In pulp grinder, mashing processing to beating degree is 30~35 ° of SR, obtains copy paper slurry, copy paper slurry is placed in pattern copies to take in device and carry out Copy paper processing, quantification of 110g/m2, by above-mentioned copy paper treated paper is placed in 10~15MPa, 120~150 DEG C, hot pressing After handling 30~45min, standing is cooled to room temperature, and obtains filter paper matrix；Again in mass ratio 1:10, stearic acid is added to n-hexane In, it is stirred to obtain modification liquid, filter paper matrix is dipped in modification liquid, after 6~8h of immersion treatment, filter paper is taken out and is used just Hexane washs 3~5 times, and vacuum drying can be prepared into a kind of resistant to dissolution type oil-water separation filter paper.
Example 1
In mass ratio 1:2, straw and reed are placed in pulverizer and crushes and sieves with 100 mesh sieve, obtains mixed-powder, by quality Than 1:5,0.5MPa is placed in after mixed-powder is mixed with 12% sodium sulfite solution of mass fraction, boiling 5h at 160 DEG C, with Release and stop heating afterwards, standing is cooled to room temperature, and is prepared into primary filament slurries；Primary filament slurries are placed in wash engine After pulp washing to concentration of slurry is 5%, screen fibre slurries are collected to obtain, by 20U/g enzyme dosages, it is fine that zytase is added to screening It ties up in slurries, adjusts fiber slurry pH to 8.0 with 8% sodium hydroxide solution of mass fraction, be stirred and be placed in water at 45 DEG C Bath heating 1h, standing are cooled to room temperature, and obtain enzymolysis fiber slurry, in mass ratio 1:10, the potassium ferricyanide is added to enzymolysis fiber In slurries, after being stirred 25min at 250r/min, 45 DEG C, obtains mixed liquor and be placed in stainless steel cauldron, at 145 DEG C Lower insulation reaction 40h, control reaction mixing speed is 3200r/min, after the completion of waiting for insulation reaction, cooled to room temperature, and mistake Filter cake is filtered to obtain, at 75 DEG C after dry 6h, obtains modified fibre, in mass ratio 1:5, by modified fibre and 15 ° of SR needles of beating degree Wood pulp, which is stirred, to be placed in beater, and mashing processing to beating degree is 30 ° of SR, obtains copy paper slurry, copy paper slurry is placed in Pattern, which is copied, takes progress copy paper processing, quantification of 110g/m in device2, by above-mentioned copy paper treated paper is placed in 10MPa, 120 DEG C Under, after hot-pressing processing 30min, standing is cooled to room temperature, and obtains filter paper matrix；Again in mass ratio 1:10, stearic acid is added to just In hexane, it is stirred to obtain modification liquid, filter paper matrix is dipped in modification liquid, after immersion treatment 6h, filter paper is taken out and is used in combination N-hexane washs 3 times, and vacuum drying can be prepared into a kind of resistant to dissolution type oil-water separation filter paper.
Example 2
In mass ratio 1:2, straw and reed are placed in pulverizer and crushes and sieves with 100 mesh sieve, obtains mixed-powder, by quality Than 1:5,0.7MPa is placed in after mixed-powder is mixed with 12% sodium sulfite solution of mass fraction, boiling 7h at 165 DEG C, with Release and stop heating afterwards, standing is cooled to room temperature, and is prepared into primary filament slurries；Primary filament slurries are placed in wash engine After pulp washing to concentration of slurry is 5%, screen fibre slurries are collected to obtain, by 20U/g enzyme dosages, it is fine that zytase is added to screening It ties up in slurries, adjusts fiber slurry pH to 8.0 with 8% sodium hydroxide solution of mass fraction, be stirred and be placed in water at 50 DEG C Bath heating 2h, standing are cooled to room temperature, and obtain enzymolysis fiber slurry, in mass ratio 1:10, the potassium ferricyanide is added to enzymolysis fiber In slurries, after being stirred 27min at 275r/min, 47 DEG C, obtains mixed liquor and be placed in stainless steel cauldron, at 147 DEG C Lower insulation reaction 44h, control reaction mixing speed is 3250r/min, after the completion of waiting for insulation reaction, cooled to room temperature, and mistake Filter cake is filtered to obtain, at 77 DEG C after dry 7h, obtains modified fibre, in mass ratio 1:5, by modified fibre and 15 ° of SR needles of beating degree Wood pulp, which is stirred, to be placed in beater, and mashing processing to beating degree is 32 ° of SR, obtains copy paper slurry, copy paper slurry is placed in Pattern, which is copied, takes progress copy paper processing, quantification of 110g/m in device2, by above-mentioned copy paper treated paper is placed in 12MPa, 125 DEG C Under, after hot-pressing processing 37min, standing is cooled to room temperature, and obtains filter paper matrix；Again in mass ratio 1:10, stearic acid is added to just In hexane, it is stirred to obtain modification liquid, filter paper matrix is dipped in modification liquid, after immersion treatment 7h, filter paper is taken out and is used in combination N-hexane washs 4 times, and vacuum drying can be prepared into a kind of resistant to dissolution type oil-water separation filter paper.
Example 3
In mass ratio 1:2, straw and reed are placed in pulverizer and crushes and sieves with 100 mesh sieve, obtains mixed-powder, by quality Than 1:5,0.8MPa is placed in after mixed-powder is mixed with 12% sodium sulfite solution of mass fraction, boiling 10h at 170 DEG C, Subsequent release simultaneously stops heating, and standing is cooled to room temperature, and is prepared into primary filament slurries；Primary filament slurries are placed in wash engine After middle pulp washing to concentration of slurry is 5%, screen fibre slurries are collected to obtain, by 20U/g enzyme dosages, zytase is added to screening In fiber slurry, fiber slurry pH to 8.0 is adjusted with 8% sodium hydroxide solution of mass fraction, is stirred and is placed at 55 DEG C Heating water bath 2h, standing are cooled to room temperature, and obtain enzymolysis fiber slurry, in mass ratio 1:10, it is fine that the potassium ferricyanide is added to enzymolysis It ties up in slurries, after being stirred 30min at 300r/min, 50 DEG C, obtains mixed liquor and be placed in stainless steel cauldron, 150 Insulation reaction 48h at DEG C, control reaction mixing speed is 3300r/min, after the completion of waiting for insulation reaction, cooled to room temperature, Filter cake is filtered to obtain, at 80 DEG C after dry 8h, obtains modified fibre, in mass ratio 1:5, by modified fibre and 15 ° of SR needles of beating degree Leaf wood pulp, which is stirred, to be placed in beater, and mashing processing to beating degree is 35 ° of SR, obtains copy paper slurry, copy paper slurry is set It is copied in pattern and takes progress copy paper processing, quantification of 110g/m in device2, by above-mentioned copy paper, treated that paper is placed in 15MPa, 150 At DEG C, after hot-pressing processing 45min, standing is cooled to room temperature, and obtains filter paper matrix；Again in mass ratio 1:10, stearic acid is added to In n-hexane, it is stirred to obtain modification liquid, filter paper matrix is dipped in modification liquid, after immersion treatment 8h, filter paper is taken out simultaneously It is washed 5 times with n-hexane, vacuum drying can be prepared into a kind of resistant to dissolution type oil-water separation filter paper.
It is prepared into filter paper as a control group by the direct copy paper of slurries prepared is modified for the addition potassium ferricyanide, is made with the present invention Filter paper prepared by standby example 1,2,3 carries out performance comparison, and performance comparison is as shown in table 1.
The 1 oil-water separation filter paper performance table of comparisons of table
As seen from the above table, the oil-water separation filter paper that prepared by the present invention has excellent separating property and resistance to swelling energy.

Claims (6)

1.一种耐溶解型油水分离滤纸的制备方法，其特征在于具体制备步骤为：1. a kind of preparation method of dissolution-resistant type oil-water separation filter paper is characterized in that concrete preparation steps are: （1）按质量比1:2，将麦秆和芦苇置于粉碎机中粉碎并过100目筛，得混合粉末，按质量比1:5，将混合粉末与亚硫酸钠溶液混合后蒸煮5～10h，卸压并停止加热，静置冷却至室温，得初级纤维浆液；(1) According to the mass ratio of 1:2, put wheat straw and reed in a pulverizer to crush and pass through a 100-mesh sieve to obtain a mixed powder. According to a mass ratio of 1:5, mix the mixed powder with sodium sulfite solution and cook for 5-10 hours , release the pressure and stop heating, let stand to cool to room temperature, and obtain the primary fiber slurry; （2）将初级纤维浆液洗浆至浆液浓度为5％，得筛选纤维浆液，将木聚糖酶添加至筛选纤维浆液中，调节纤维浆液pH至8.0，搅拌混合并水浴加热，静置冷却至室温，得酶解纤维浆液；(2) Wash the primary fiber slurry to a concentration of 5% to obtain a screened fiber slurry, add xylanase to the screened fiber slurry, adjust the pH of the fiber slurry to 8.0, stir and mix, heat in a water bath, and let stand to cool to At room temperature, the enzymatic fiber slurry was obtained; （3）按质量比1:10，将铁氰化钾添加至酶解纤维浆液中，搅拌混合得混合液并置于不锈钢反应釜中，保温反应后，自然冷却至室温，过滤得滤饼，干燥得改性纤维；(3) According to the mass ratio of 1:10, add potassium ferricyanide to the enzymatic fiber slurry, stir and mix to obtain a mixed solution and place it in a stainless steel reaction kettle. After heat preservation and reaction, cool naturally to room temperature and filter to obtain a filter cake. Dried modified fiber; （4）按质量比1:5，将改性纤维与针叶木浆搅拌混合并置于打浆机中，打浆处理得抄纸浆料，将抄纸浆料置于纸样抄取器中进行抄纸处理，再经纸张热压处理后，静置冷却至室温，得滤纸基体；(4) According to the mass ratio of 1:5, the modified fiber and coniferous wood pulp were stirred and mixed and placed in a beater, and the papermaking slurry was obtained by beating, and the papermaking slurry was placed in a paper sample extractor for papermaking treatment. After the paper is heat-pressed, it is allowed to stand and cool down to room temperature to obtain the filter paper matrix; （5）按质量比1:10，将硬脂酸添加至正己烷中，搅拌混合得改性液，将滤纸基体浸泡至改性液 ，浸泡处理后，洗涤、干燥，即可制备得一种耐溶解型油水分离滤纸。(5) Add stearic acid to n-hexane at a mass ratio of 1:10, stir and mix to obtain a modified liquid, soak the filter paper substrate into the modified liquid, wash and dry after soaking to prepare a Solvent-resistant oil-water separation filter paper. 2.根据权利要求1所述的一种耐溶解型油水分离滤纸的制备方法，其特征在于：步骤（1）所述的蒸煮为于0.5～0.8MPa、160～170℃下蒸煮5～10h。2. The method for preparing a solvent-resistant oil-water separation filter paper according to claim 1, characterized in that: the cooking in step (1) is cooking at 0.5-0.8 MPa and 160-170°C for 5-10 hours. 3.根据权利要求1所述的一种耐溶解型油水分离滤纸的制备方法，其特征在于：步骤（2）所述的木聚糖酶添加量为20U/g。3. The method for preparing a dissolution-resistant oil-water separation filter paper according to claim 1, characterized in that the amount of xylanase added in step (2) is 20 U/g. 4.根据权利要求1所述的一种耐溶解型油水分离滤纸的制备方法，其特征在于：步骤（3）所述的保温反应过程中搅拌速度为3200～3300r/min。4. The method for preparing a dissolution-resistant oil-water separation filter paper according to claim 1, characterized in that: the stirring speed in the heat preservation reaction process in step (3) is 3200-3300 r/min. 5.根据权利要求1所述的一种耐溶解型油水分离滤纸的制备方法，其特征在于：步骤（4）所述的针叶木浆为打浆度15°SR的针叶木浆。5 . The method for preparing a solvent-resistant oil-water separation filter paper according to claim 1 , wherein the softwood pulp in step (4) is softwood pulp with a beating degree of 15°SR. 6.根据权利要求1所述的一种耐溶解型油水分离滤纸的制备方法，其特征在于：步骤（4）所述的抄纸定量为110g/m2。6 . The method for preparing a dissolution-resistant oil-water separation filter paper according to claim 1 , wherein the weight of the paper in step (4) is 110 g/m 2 .
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CN111254746A (en) * 2020-01-20 2020-06-09 南昌航空大学 Simple method for preparing super-hydrophobic filter paper by solution soaking method
CN112921687B (en) * 2021-04-01 2022-03-22 安徽新立滤清器有限公司 Preparation method of wood fiber bundle by microbial enzyme degradation modification

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