CN115160813B - A method for preparing a degradable wood-plastic composite material - Google Patents

Abstract

The invention relates to the field of composite material preparation, in particular to a preparation method of a degradable wood-plastic composite material. A method comprising the steps of: s1: taking a plurality of straws, arranging the straws on a preparation device to form a circle in the middle, and outwards diverging a plurality of straight forms; s2: heating and mixing polycaprolactone, a bioactive agent, a photocatalyst and a thermal oxygen degradation promoter to prepare a plastic melt; s3: pouring the plastic melt onto a plurality of straws on a preparation device, so that the plastic melt is combined with the plurality of straws; s4: and (5) waiting for the plastic melt to be cooled and solidified to prepare the wood-plastic composite material. The plastic melt can be combined with a plurality of straw.

Description

A method for preparing a degradable wood-plastic composite material

Technical Field

The invention relates to the field of composite material preparation, and more particularly to a method for preparing a degradable wood-plastic composite material.

Background technique

Sometimes called composite wood, wood plastic composite is most widely used for outdoor decking, but it is also used for railings, fences, landscape timber, cladding and siding, park benches, molding and trim, and prefabricated housing. Due to the addition of organic materials, wood plastic composites are usually processed at much lower temperatures than traditional plastics during extrusion and injection molding. Existing wood plastic composites will separate into several pieces after breaking, and will not still form a whole after breaking. Under the use conditions where it is not desirable for the wood plastic composite to break into multiple pieces, it cannot meet the needs of such use conditions.

Summary of the invention

In order to overcome the shortcomings of the prior art, the present invention provides a method for preparing a degradable wood-plastic composite material, which has the beneficial effect of allowing the plastic melt to be combined with multiple straws to still form a whole after being broken.

A method for preparing a degradable wood-plastic composite material comprises the following steps:

S1: Take a plurality of rice straws and place them on a preparation device into a shape with a circle in the middle and multiple straight lines radiating outwards;

S2: heating and mixing polycaprolactone, bioactive agent, photocatalyst and thermal oxidation degradation accelerator to prepare plastic melt;

S3: pouring the plastic melt onto the plurality of straws on the preparation device so that the plastic melt is combined with the plurality of straws;

S4: Wait for the plastic melt to cool and solidify to make a wood-plastic composite material.

The mass ratio of the polycaprolactone, the bioactive agent, the photocatalyst and the thermal oxidation degradation accelerator is 30:1:1:2.

The rice straw is dry rice straw.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

FIG1 is a flow chart of a method for preparing a degradable wood-plastic composite material;

FIG. 2 is a schematic structural diagram of a preparation device;

FIG3 is a second schematic structural diagram of a preparation device;

FIG4 is a third structural schematic diagram of a preparation device;

Figure 5 is a schematic diagram of the structure of the tank box;

Figure 6 is a second structural diagram of the trough box;

FIG7 is a structural schematic diagram of the outer ring 1;

FIG8 is a second schematic diagram of the structure of the outer ring;

FIG9 is a schematic diagram of the structure of the beam;

Figure 10 is a schematic diagram of the structure of a T-shaped frame;

FIG. 11 is a second structural diagram of a T-shaped frame.

In the figure: slot box 101; convex seat 102; push column 103; bottom bar 104; support leg 105; stopper 106;

Outer ring 201; inner ring 202; rubber sheet 203; bottom opening 204; divergent column 205; rubber strip 206; connecting column 207; L-shaped column 208;

Crossbeam 301; side plate 302; hand-screw 303; bottom piece 304; seat block 305; inclined surface 306;

T-shaped frame 401; round rod 402; plug socket 403; rubber sleeve 404.

Detailed ways

A method for preparing a degradable wood-plastic composite material comprises the following steps:

S1: Take a plurality of rice straws and place them on a preparation device into a shape with a circle in the middle and multiple straight lines radiating outwards;

S2: heating and mixing polycaprolactone, bioactive agent, photocatalyst and thermal oxidation degradation accelerator to prepare plastic melt;

S3: pouring the plastic melt onto the plurality of straws on the preparation device so that the plastic melt is combined with the plurality of straws;

S4: Wait for the plastic melt to cool and solidify to make a wood-plastic composite material.

The mass ratio of the polycaprolactone, the bioactive agent, the photocatalyst and the thermal oxidation degradation accelerator is 30:1:1:2.

The rice straw is dry rice straw.

As shown in Figure 5-8, this example can achieve the effect of preventing the wood-plastic composite material from breaking into multiple pieces.

Since the preparation device includes a trough box 101, an outer ring 201 and an inner ring 202, the outer ring 201 and the inner ring 202 are both arranged in the trough box 101, and the outer ring 201 and the inner ring 202 are coaxially arranged, so that an annular groove is formed between the outer ring 201 and the inner ring 202, and then the straw is spread in the annular groove, so that the straw is arranged on the trough box 101 in an annular shape, and then the plastic melt is introduced into the trough box 101, and the plastic melt is waited to solidify, and then the annular straw is arranged inside the plastic, and then the plastic can still be connected through the straw after it is broken through the annular straw in the middle, and the broken straw is also added to the plastic melt, and the straw is equivalent to the wood in the wood-plastic composite material, so as to prevent the wood-plastic composite material from being divided into multiple pieces after being broken.

As shown in FIGS. 5-8 , this example can achieve the effect of ensuring that the outer ring 201 and the inner ring 202 are in a fixed position each time after entering the tank box 101 .

Since the preparation device further includes a boss 102, a connecting column 207 and an L-shaped column 208, the upper sides of the outer ring 201 and the inner ring 202 are welded with connecting columns 207, and multiple connecting columns 207 are welded on the L-shaped column 208, and an annular groove is formed between the outer ring 201 and the inner ring 202. The rear side of the slot box 101 is connected with the boss 102 by screws, and the rear part of the L-shaped column 208 is inserted on the boss 102. The boss 102 allows the L-shaped column 208 to be inserted, so that the outer ring 201 and the inner ring 202 are in a fixed position each time after entering the slot box 101; the outer ring 201 and the inner ring 202 are connected to the L-shaped column 208 through the connecting column 207, so that the outer ring 201 and the inner ring 202 are coaxially arranged.

As shown in Figures 7-8, this example can achieve the effect of avoiding the disconnection of the wood-plastic composite material after breaking.

Since the preparation device further includes a diverging column 205, a plurality of diverging columns 205 are arranged on the outer side of the outer ring 201, and a strip groove is arranged on each of the plurality of diverging columns 205. Straws can also be inserted into the strip grooves, and then the straws in the plurality of strip grooves are combined with the straws in the annular grooves, so that the straws form a diverging shape of the sun, and then straws are arranged at various positions of the wood-plastic composite material, and the arrangement of the straws in the diverging shape of the sun effectively prevents the wood-plastic composite material from being disconnected after being broken.

As shown in Figures 7-8, this example can achieve the effect of fully combining the plastic melt with the straw in the shape of a sun radiating shape.

Since the preparation device also includes a bottom opening 204, the lower parts of the outer ring 201 and the diverging column 205 are both provided with a bottom opening 204. The setting of the bottom opening 204 allows the plastic melt to flow into the straw in the annular groove and the strip groove, thereby allowing the plastic melt to fully combine with the sun-diverging-shaped straw.

As shown in FIG. 7 , this example can achieve the effect of preventing straw from running out from the upper side of the strip groove.

The preparation device also includes a rubber sheet 203, and each diverging column 205 is bonded with a plurality of rubber sheets 203 on its upper side. The plurality of rubber sheets 203 can block the straw in the strip groove to prevent the straw from running out from the upper side of the strip groove, and the plurality of rubber sheets 203 are elastic and do not affect manual placement of straw into the strip groove.

As shown in FIG. 7 , this example can achieve the effect of preventing straw from running out from the upper side of the annular groove.

Since the preparation device further includes a rubber strip 206, a plurality of rubber strips 206 are bonded to the upper side of the inner ring 202, and the plurality of rubber strips 206 are bonded to the upper side of the inner ring 202. The plurality of rubber strips 206 can block the straw in the annular groove to prevent the straw from running out from the upper side of the annular groove, and the plurality of rubber strips 206 are elastic and do not affect manual placement of the straw into the annular groove.

As shown in FIGS. 5-6 , this example can achieve the effect of fixing the two legs 105 on the ground.

Since the preparation device further includes legs 105, the lower side of the trough box 101 is connected to two legs 105 by screws, and both legs 105 are provided with sockets. The sockets on the two legs 105 can be screwed to fix the two legs 105 on the ground.

The preparation device also includes a T-shaped frame 401, a round rod 402, a plug-in seat 403 and a rubber sleeve 404. The plug-in seat 403 is plugged into the front of the L-shaped column 208, and a fastening screw I is provided on the plug-in seat 403. The fastening screw I is pressed on the L-shaped column 208. The upper part of the T-shaped frame 401 is vertically slidably connected to the plug-in seat 403. A rubber sleeve 404 is provided at the sliding connection position between the T-shaped frame 401 and the plug-in seat 403. A plurality of round rods 402 are welded to the lower part of the T-shaped frame 401 from left to right, and the plurality of round rods 402 are all located above the outer ring 201.

As shown in Figures 10-11, this example can prevent the straw in the annular groove and the strip groove from running out.

When the T-shaped frame 401 slides vertically on the plug-in seat 403, it can drive the multiple round rods 402 to move up and down. The multiple round rods 402 can block the upper side of the straw in the annular groove and the strip groove to prevent the straw in the annular groove and the strip groove from running out. After the plastic melt is combined with the straw, the plug-in seat 403 is removed, and then the T-shaped frame 401 and the multiple round rods 402 are removed. The rubber sleeve 404 can increase the friction between the T-shaped frame 401 and the plug-in seat 403, so that the relative position between the T-shaped frame 401 and the plug-in seat 403 is easy to fix.

The preparation device also includes a push column 103, a bottom bar 104 and a stopper 106. There is one bottom bar 104 on each side. A push column 103 is welded at both ends of the front and rear of each bottom bar 104. Multiple push columns 103 are slidably connected to the bottom surface of the trough box 101. The left and right ends of the rear side of the trough box 101 are screwed with stoppers 106. The two stoppers 106 are respectively blocked at the lower sides of the two bottom bars 104. A spring is provided between the trough box 101 and the bottom bar 104.

As shown in Figure 5-6, this example can achieve the effect of ejecting the solidified wood-plastic composite material.

The spring exerts a downward force on the bottom bar 104, so that the bottom bar 104 pushes downward on the stopper 106. At this time, the two push pins 103 on the bottom bar 104 do not protrude from the bottom surface of the tank box 101. When the solidified plastic needs to be discharged, the bottom bar 104 is pushed upward to drive the two push pins 103 thereon to move upward, thereby ejecting the solidified wood-plastic composite material.

The preparation device also includes a crossbeam 301, a side plate 302, a hand-screw rod 303, a bottom piece 304, a seat block 305 and an inclined surface 306. The middle part of the crossbeam 301 is fixed to the lower side of the trough box 101. The two side plates 302 are respectively slidably connected to the two ends of the crossbeam 301. The two side plates 302 are respectively blocked on both sides of the trough box 101. The lower side of each side plate 302 is integrally formed with a bottom piece 304. The two bottom pieces 304 are each provided with a seat block 305. The two seat blocks 305 are each provided with an inclined surface 306. The two inclined surfaces 306 are respectively located on the inner sides of the two bottom strips 104. The two ends of the crossbeam 301 are rotatably connected with the hand-screw rod 303 through bearings. The two hand-screw rods 303 are respectively matched with the two bottom pieces 304 through threads.

As shown in FIG. 9 , this example can achieve the effect that when the side plate 302 moves outward, it also drives the push column 103 to move upward.

Rotating the hand screw 303 can drive the hand screw 303 and the bottom piece 304 to move outward, thereby opening the left and right sides of the tank box 101, and then driving the seat block 305 and the inclined surface 306 thereon to move outward. After the inclined surface 306 contacts the bottom bar 104, it drives the bottom bar 104 and the two push pins 103 thereon to move upward, thereby making the side panels 302 move outward and also drive the push pins 103 to move upward. The push pins 103 move upward to push out the wood-plastic composite material, and the two side panels 302 are separated from the two sides of the wood-plastic composite material, respectively, so that the wood-plastic composite material can be manually taken out from both sides.

Claims (3)

1. The preparation method of the degradable wood-plastic composite material is characterized by comprising the following steps of:

s1: taking a plurality of straws, arranging the straws on a preparation device to form a circle in the middle, and outwards diverging a plurality of straight forms;

S2: heating and mixing polycaprolactone, a bioactive agent, a photocatalyst and a thermal oxygen degradation promoter to prepare a plastic melt;

S3: pouring the plastic melt onto a plurality of straws on a preparation device, so that the plastic melt is combined with the plurality of straws;

S4: waiting for the plastic melt to be cooled and solidified to prepare the wood-plastic composite material;

The mass part ratio of the polycaprolactone to the bioactive agent to the photocatalyst to the thermal oxygen degradation accelerator is 30:1:1:2;

The rice straw is dried rice straw;

The preparation device comprises a groove box (101), an outer ring (201) and an inner ring (202), wherein the outer ring (201) and the inner ring (202) are coaxially arranged, and the outer ring (201) and the inner ring (202) are both arranged in the groove box (101);

The preparation device further comprises a boss (102), connecting columns (207) and L-shaped columns (208), wherein the connecting columns (207) are fixedly connected to the upper sides of the outer ring (201) and the inner ring (202), the connecting columns (207) are connected to the L-shaped columns (208), annular grooves are formed between the outer ring (201) and the inner ring (202), the boss (102) is arranged on the rear side of the groove box (101), and the rear parts of the L-shaped columns (208) are inserted on the boss (102);

The preparation device further comprises a divergent column (205), a plurality of divergent columns (205) are arranged on the outer side of the outer ring (201), and strip-shaped grooves are formed in the divergent columns (205);

the preparation device further comprises a bottom opening (204), and the bottom openings (204) are arranged at the lower parts of the outer ring (201) and the divergent column (205);

the preparation device further comprises rubber sheets (203), and a plurality of rubber sheets (203) are adhered to the upper side of each divergent column (205);

The preparation device further comprises rubber strips (206), wherein a plurality of rubber strips (206) are adhered to the upper side of the inner ring (202), and the plurality of rubber strips (206) are adhered to the upper side of the inner ring (202);

the preparation device further comprises support legs (105), two support legs (105) are arranged on the lower side of the groove box (101), and insertion holes are formed in the two support legs (105);

The preparation facilities still includes T shape frame (401), round bar (402), plug seat (403) and rubber sleeve (404), the front portion grafting of L shape post (208) has plug seat (403), be provided with fastening screw I on plug seat (403), fastening screw I presses on L shape post (208), the vertical sliding connection in upper portion of T shape frame (401) is provided with rubber sleeve (404) on plug seat (403), the sliding connection position of T shape frame (401) and plug seat (403) is provided with rubber sleeve (404), the lower part of T shape frame (401) has a plurality of round bars (402) from left to right welding, a plurality of round bars (402) all are located the top of outer loop (201).

2. The method for preparing the degradable wood-plastic composite according to claim 1, wherein the method comprises the following steps: the preparation facilities is still including pushing away post (103), sill strip (104) and fender piece (106), and sill strip (104) are provided with one about respectively, and both ends all weld around every sill strip (104) have to push away post (103), and a plurality of equal sliding connection of pushing away post (103) are on the bottom surface of groove box (101), and both ends all screw connection has fender piece (106) about groove box (101) rear side, and two fender pieces (106) keep off respectively in the downside of two sill strips (104), are provided with the spring between groove box (101) and sill strip (104).

3. The method for preparing the degradable wood-plastic composite according to claim 2, wherein the method comprises the following steps: the preparation device further comprises a cross beam (301), side plates (302), hand-rotating screws (303), bottom pieces (304), seat blocks (305) and inclined planes (306), wherein the middle part of the cross beam (301) is fixed at the lower side of the groove box (101), the two side plates (302) are respectively connected with the two ends of the cross beam (301) in a sliding mode, the two side plates (302) are respectively blocked at the two sides of the groove box (101), the bottom pieces (304) are uniformly formed on the lower side of each side plate (302), the seat blocks (305) are respectively arranged on the two bottom pieces (304), the inclined planes (306) are respectively arranged on the inner sides of the two bottom pieces (104), the two ends of the cross beam (301) are respectively connected with the hand-rotating screws (303) through bearings in a rotating mode, and the two hand-rotating screws (303) are respectively matched with the two bottom pieces (304) through threads.