CN102524909B - 含有赤藓糖醇脂肪酸酯的抑菌组合物及其制备和应用 - Google Patents
含有赤藓糖醇脂肪酸酯的抑菌组合物及其制备和应用 Download PDFInfo
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- CN102524909B CN102524909B CN201010618523.4A CN201010618523A CN102524909B CN 102524909 B CN102524909 B CN 102524909B CN 201010618523 A CN201010618523 A CN 201010618523A CN 102524909 B CN102524909 B CN 102524909B
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Abstract
本发明涉及具有抑菌活性的下式(I)赤藓糖醇三脂肪酸酯和四脂肪酸酯作为防腐剂/抑菌剂用于食品、医药及化妆品领域的新的用途及其制备方法,以及含有所述赤藓糖醇脂肪酸酯的抑菌组合物及其制备方法和应用,式中R1、R2、R3、R4相同或不同,各自独立地表示H或脂肪酸残基,且R1、R2、R3、R4中至少有三个不为H,所述脂肪酸残基选自直链或支链、饱和或不饱和的C2-C28脂肪族一元羧酸或多元羧酸残基。
Description
技术领域
本发明涉及具有抑菌活性的赤藓糖醇三脂肪酸酯和四脂肪酸酯作为防腐剂/抑菌剂用于食品、医药及化妆品领域的新的用途及其制备方法,以及含有所述赤藓糖醇脂肪酸酯的抑菌组合物及其制备方法和应用。
背景技术
“天然、营养、多功能”已成为目前食品行业的发展方针。开发安全、高效的新型食品添加剂是近年来国际上食品添加剂领域发展的方向。
糖醇脂肪酸酯(Alditols fatty acid esters)是一类脂肪替代品,为糖醇与脂肪酸(通常C8-C22脂肪酸)的酯化产品。现已开发出木糖醇、山梨糖醇、麦芽糖醇及甘露糖醇等糖醇的脂肪酸酯作为添加剂在食品、医药及化妆品领域广泛应用。
赤藓糖醇(Erythritol),又名原藻醇、赤兔草醇,化学名称为1,2,3,4-丁四醇。在自然界中分布广泛,存在于海藻、蘑菇类、水果类、地衣类植物、微生物、发酵食品、以及动物体液等中。赤藓糖醇是一种带有清凉口感的填充型甜味剂,不仅拥有糖醇类产品的所有功能,如防止龋齿、适宜糖尿病患者食用等特点,还独具低能量值和高耐受量的特性,属于填充型的功能性食糖替代品。
鉴于赤藓糖醇的特殊功能,其衍生物在国际上已成为研究热点之一。
研究表明,赤藓糖醇脂肪酸酯具有特殊的营养功能特性,它在给人体提供低能量的同时,还可以发挥减少脂肪堆积,预防糖尿病、肥胖症发生的作用。由于该酯既有亲水头又有疏水尾,还可以作为功能性表面活性剂、乳化剂、保湿剂和消泡剂等,在食品、医药、化妆品及化工领域展现出广阔的应用前景。
2009年7月GRAS组织通过了赤藓糖醇脂肪酸酯为食品中微胶囊壁材的安全认证。中国专利申请CN 1649664 A公开了有关于赤藓糖醇和/或其缩聚物的脂肪酸酯有助于细颗粒稳定分散而作为改进分散性的细颗粒分散剂和含有该分散剂的化妆品、涂料、油墨、记忆材料和润滑剂。美国专利US 5,064,672和US 5,536,524中均提到将赤藓糖醇四脂肪酸酯作为低热量脂肪替代物。JP特开2005-13061披露将赤藓糖醇单或双脂肪酸酯、优选赤藓糖醇单脂肪酸酯用作食品和饮料的抑菌剂。但迄今为止尚未见赤藓糖醇三或四脂肪酸酯有抑菌作用的文献报道。
本发明人对赤藓糖醇三和四脂肪酸酯进行了深入细致的实验研究,发现其具有非常有益的抑制真菌和细菌生长的特性,可用于食品、医药及化妆品等领域作为抑菌剂或防腐剂。同时,由于赤藓糖醇三和四脂肪酸酯优异的脂肪替代功能,可以在保持食品原有口感、风味和品质的基础上,降低食品中脂肪的含量,对预防和降低由高膳食脂肪引起的心血管病、肥胖症的发病率有很好的应用前景。申请人由此完成了本发明。
发明内容
因此,本发明提供一种抑菌组合物,含有赤藓糖醇脂肪酸酯作为活性成分,以及食品、药品或化妆品可接受的载体,所述赤藓糖醇脂肪酸酯具有下述通式(I)结构:
其中R1、R2、R3、R4相同或不同,各自独立地表示H或脂肪酸残基,且R1、R2、R3、R4中至少有三个不为H,所述脂肪酸残基为直链或支链、饱和或不饱和的C2-C28脂肪族一元羧酸或多元羧酸残基。
本发明还涉及所述通式(I)赤藓糖醇脂肪酸酯的制备方法。
此外,本发明还涉及所述通式(I)赤藓糖醇脂肪酸酯作为抑菌剂或防腐剂的应用。
本发明还涉及所述通式(I)赤藓糖醇脂肪酸酯和含有所述通式(I)赤藓糖醇脂肪酸酯的组合物在制备抑菌剂或防腐剂方面的应用。
在本发明中,用于形成所述通式(I)赤藓糖醇脂肪酸酯化合物的脂肪酸为具有2-28个、优选4-22个、尤其是6-18个、特别优选8-16个碳原子的直链或支链、饱和或不饱和的脂肪族一元羧酸或多元羧酸。在本发明中,特别优选直链或支链的饱和脂肪族一元羧酸。
所述直链脂肪酸包括直链的饱和脂肪酸以及不饱和脂肪酸,作为直链的饱和脂肪酸,可以包括,但不限于,例如乙酸、正丙酸、正丁酸、正戊酸、正己酸、正庚酸、正辛酸、正壬酸、正癸酸、十一烷酸、十二烷酸、十三烷酸、十四烷酸、十六烷酸、十八烷酸、二十烷酸(花生酸)、二十二烷酸(山芋酸)、二十四烷酸、二十六烷酸、二十八烷酸等;作为直链的不饱和脂肪酸,可以包括,但不限于,例如十碳烯酸、十一碳烯酸、十二碳烯酸、十四碳烯酸、十六碳烯酸、十八碳烯酸、二十碳烯酸、二十二碳烯酸等。
所述含有支链的饱和或不饱和脂肪酸包括,但不限于,例如异丁酸、异戊酸、异己酸、异庚酸、异辛酸、2-乙基己酸、4-丙基戊酸、异壬酸、异癸酸、异十二烷酸、甲基癸酸、异月桂酸、3-甲基十一烷酸、异十三烷酸、甲基十二烷酸、异肉豆蔻酸、甲基十三烷酸、异棕榈酸、异硬脂酸、甲基十七烷酸、异二十烷酸、反-2-甲基-2-丁烯酸、3-甲基-2-丁烯酸、2-甲基-4-戊烯酸、2-甲基-2-戊烯酸、4-甲基-2-戊烯酸、2-甲基-2-己烯酸、2,4-二甲基-2-戊烯酸、3,7-二甲基-6-辛烯酸等。
所述多元羧酸包括,但不限于,例如丙二酸、丁二酸、戊二酸、己二酸、庚二酸、壬二酸、辛二酸、癸二酸、十一烷二酸、十四烷二酸等。
在本发明中,优选4-18个碳原子、特别优选8-16个碳原子的直链或支链、饱和或不饱和的脂肪族一元羧酸或多元羧酸,可以包括,但不限于,例如己酸、庚酸、辛酸、异辛酸、壬酸、癸酸、月桂酸、油酸、亚油酸、亚麻酸、肉豆蔻酸、棕榈酸、棕榈油酸、硬脂酸、蓖麻油酸等。在本发明中,特别优选8-16个碳原子的直链或支链的饱和脂肪族一元羧酸或多元羧酸。
在本发明中,优选的通式(I)赤藓糖醇脂肪酸酯包括,但不限于,例如赤藓糖醇三己酸酯、赤藓糖醇四己酸酯、赤藓糖醇三庚酸酯、赤藓糖醇四庚酸酯、赤藓糖醇三辛酸酯、赤藓糖醇四辛酸酯、赤藓糖醇三癸酸酯、赤藓糖醇四癸酸酯、赤藓糖醇三月桂酸酯、赤藓糖醇四月桂酸酯、赤藓糖醇三肉豆蔻酸酯、赤藓糖醇四肉豆蔻酸酯、赤藓糖醇三棕榈酸酯、赤藓糖醇四棕榈酸酯、赤藓糖醇三硬脂酸酯、赤藓糖醇四硬脂酸酯等。
在本发明中,所述通式(I)赤藓糖醇脂肪酸酯特别优选为赤藓糖醇四脂肪酸酯。
本发明抑菌组合物,可以按照常规方法,通过将所述通式(I)赤藓糖醇脂肪酸酯与食品、药品或化妆品可接受的载体混合来制备。
在本发明中,所述食品可接受的载体包括,但不限于,例如淀粉,纤维素,糊精,乳脂,动植物油脂例如芝麻油、大豆油、花生油、棕榈油、橄榄油、玉米油、菜籽油、猪油脂、牛油脂等,食用胶例如阿拉伯树胶、明胶、卡拉胶、黄原胶、瓜尔豆胶、海藻酸钠等,磷脂如卵磷脂,脑磷脂等,泡打粉等;所述药品可接受的载体包括,但不限于,例如淀粉,纤维素,糊精,动植物油脂例如芝麻油、大豆油、花生油、棕榈油、橄榄油、玉米油、菜籽油、猪油脂、牛油脂等,阿拉伯树胶,明胶,西黄蓍胶,硬脂酸,硬脂酸钙,卵磷脂,聚乙二醇,蜂蜡,石蜡,凡士林,蓖麻油,羊毛脂,碳酸钙等;所述化妆品可接受的载体包括,但不限于,例如动植物油脂例如芝麻油、大豆油、花生油、棕榈油、橄榄油、玉米油、菜籽油、猪油脂、牛油脂、杏仁油、椰子油、蓖麻油、可可脂等,阿拉伯树胶,明胶,白矿油,白油,蜂蜡,石蜡,鲸蜡,地蜡,鲸蜡醇,脂蜡醇,凡士林,硬脂酸,肉豆蔻酸,羊毛脂,碳酸钙,卵磷脂,聚乙二醇等。
在本发明抑菌组合物中,活性成分通式(I)赤藓糖醇脂肪酸酯的含量可以为0.001-99.9%,例如1.0-99.0%、2.0-99.0%、5.0-98.0%、10.0-95.0%、20.0-90.0%、30.0-80.0%等。
本发明通式(I)赤藓糖醇脂肪酸酯或含有该赤藓糖醇脂肪酸酯的组合物可用于食品、药品和化妆品的抑菌防腐,所述食品包括,但不限于,乳制品、煎炸及焙烤食品、肉类制品、调味酱、饮料等,比如牛奶、酸奶、冰琪琳、奶昔、奶酪、奶粉、奶油、灭菌乳、调制乳、发酵乳、炼乳、乳粉、乳清粉、乳清蛋白粉、干酪、再制干酪、奶粉、婴幼儿辅助食品;薯片、麻花;蛋糕、面包、煎饼、雪饼、酥饼、月饼、烧饼、派、吐司、蛋卷泡芙、烤布丁、蛋奶沙司、饼干、威化饼、蛋挞、方便面、方便米饭、披萨、酥油茶、沙琪玛、米通、年糕、粽子;肉制品:火腿肠、烤肠、培根、叉烧、午餐肉、肉干、猪肉脯、肴肉、腊肉、腊肠;沙拉酱、酥糖、奶糖、奶茶、咖啡、茶饮料。所述化妆品包括,但不限于,护肤类化妆品如润肤露、润肤油、雪花膏、冷霜、乳液、化妆水;润肤霜和蜜、清洁霜和蜜、营养霜和蜜、防晒油、等;美容类化妆品如香粉、胭脂、唇膏、睫毛膏等;毛发护理用品如洗发露、发油、发蜡、发乳、发膏、护发素等;个人护理用品例如沐浴露、洗面奶等;口腔卫生用品如牙膏、漱口剂等。此外,本发明赤藓糖醇脂肪酸酯作为抑菌剂,也可用于药物、如外用药物,诸如外敷类药物软膏、乳剂、栓剂等中。
另外,本发明通式(I)赤藓糖醇三或四脂肪酸酯本身具有类似油脂的理化性质,可以独立作为油脂使用,其酯键能抵抗人体内脂肪酶的催化水解,因此不参与能量代谢,即几乎不为人体提供热量。由于它们具备传统油脂为食品提供的组织特性和风味特性,因而具备作为脂肪替代物,在冰淇淋、干酪、沙拉酱、煎炸及焙烤等食品中替代部分和全部脂肪的应用潜力。因此以本发明赤藓糖醇脂肪酸酯为原料的食品或化妆品的储藏时间既可因其抑菌作用而得以延长,同时,又可以减少其它抑菌/防腐剂的用量或不使用其它抑菌/防腐剂,由此给食品和化妆品的抑菌、防腐提供新的选择。
本发明赤藓糖醇脂肪酸酯可由商业途径购得,或通过化学或酶催化方式合成。本发明还提供赤藓糖醇脂肪酸酯的制备方法。
1. 酯交换法
在催化剂和助催化剂存在下,使赤藓糖醇与脂肪酸酯(优选脂肪酸甲酯或乙酯)在减压条件下反应1-10小时,其中赤藓糖醇与脂肪酸酯的摩尔比为1:0.1-20,优选1:0.5-10,更优选1:1~6,催化剂用量为两底物(赤藓糖醇与脂肪酸酯)重量的0.1%-20%,优选1%-10%,助催化剂为两底物重量的0.1-10%,优选0.5-5%,更优选1-5%,反应温度为80-150℃,优选80-130℃,更优选90-120℃,压力为10~13kPa,反应结束得油状或膏状粗产物。对该粗产物进行分离、纯化,得赤藓糖醇脂肪酸酯。
分离纯化步骤:将所得粗产物在搅拌下倒入无机酸或有机酸水溶液中使混合物呈酸性,充分震荡混合均匀,静置分层;分出下层水溶液,用水将上层固体洗至中性,过滤,滤饼用极性有机溶剂例如甲醇、乙醇、丙酮等洗涤,以除去未反应的脂肪酸甲酯或乙酯及少量赤藓糖醇单、二脂肪酸酯,得赤藓糖醇三和四脂肪酸酯混合物。将混合物用石油醚处理并过滤,得赤藓糖醇三脂肪酸酯固体,滤液经旋转蒸发除去石油醚,得赤藓糖醇四脂肪酸酯。将产物真空干燥。
所述催化剂为碱金属或碱土金属氢氧化物、碳酸盐或碳酸氢盐,碱金属醇盐等可以催化酯交换的催化剂,包括,但不限于,例如KOH、K2CO3、KHCO3、NaOH、NaHCO3、Ca(OH)2、NaOCH3等,或其混合物。
所述助催化剂选自相转移催化剂,可以包括,但不限于,例如季铵盐、季磷盐、聚乙二醇(PEG)、或冠醚等,或者它们的混合物,包括,但不限于,例如十六烷基三甲基溴化铵,四苯基磷盐、18-冠-6,PEG-400或四丁基溴化铵等,或者它们的混合物。
用上述催化剂通过酯交换制备赤藓糖醇脂肪酸酯的方法,其赤藓糖醇脂肪酸酯(比如赤藓糖醇四脂肪酸酯)的得率(目标产物在最后反应产物中的重量百分比)可以达到70-90%。而目前发酵法制备赤藓糖醇脂肪酸酯(比如赤藓糖醇四酯)的得率很低。
上述酯交换法中也可以采用脂肪酶作催化剂,所述酶为从毛霉属(拉丁名)、根霉属、曲霉属、细菌或酵母来源的微生物脂肪酶,蛋白酶等及固定化酶Lipozyme TL、Lipozyme RM、Novozyme-435脂肪酶。反应温度等根据具体酶的特性调整。
2. 直接酯化法:
使赤藓糖醇和脂肪酸在催化剂存在下反应2-10小时,以有机溶剂作带水剂,制得赤藓糖醇脂肪酸酯粗产物,其中赤藓糖醇和脂肪酸摩尔比为1:1~6,催化剂用量为底物重量的1-5%,反应温度为80-130℃。反应结束后,对反应混合物(粗产物)进行分离、纯化,得赤藓糖醇脂肪酸酯。
分离纯化步骤:将该反应混合物倒入分液漏斗,加水洗3-4次;分出有机层,回收有机溶剂,得油状或膏状混合物;将其溶解于乙酸乙酯,滴2滴酚酞,采用碱中和法,加入碱的醇水溶液例如NaOH或KOH的甲醇或乙醇水溶液,充分振荡混匀,呈红色时停止,静置分层;分离下层水溶液,将有机层倒出,减压回收乙酸乙酯,残余物用极性有机溶剂例如甲醇、乙醇、丙酮等洗涤,以除去生成的少量赤藓糖醇单、二脂肪酸酯,得赤藓糖醇三和四脂肪酸酯混合物,将混合物用石油醚处理并过滤,得赤藓糖醇三脂肪酸酯固体,滤液经旋转蒸发除去石油醚,得赤藓糖醇四脂肪酸酯。将产物真空干燥。
所述催化剂选自磷酸,硼酸,盐酸盐、硫酸盐,金属卤化物如氯化铁、氯化铜等或有机磺酸例如对甲苯磺酸、甲烷磺酸等。
所述带水剂选自吡啶、甲苯、环己烷和正庚烷等。
本发明赤藓糖醇脂肪酸酯具有抑制真菌和细菌生长的作用。所述真菌包括霉菌,如曲霉属(Aspergillus)、青霉属(Penicillium)、酵母菌属(Saccharomyces)、镰刀菌属(Gibberella)、根霉属(Rhizopus)、毛霉属(Mucor)、木霉属(Trichoderma)等,具体包括例如黑曲霉(Aspergillus niger)、黄曲霉(Aspergillus flavus)等,酵母菌例如酒精酵母 (Saccharomyces cerevisiae) 等。
所述细菌包括例如大肠杆菌(Escherichia coli)、枯草芽孢杆菌(Bacillus subtilis)、金黄色葡萄球菌(Staphylococcus aureus)等。
本发明赤藓糖醇脂肪酸酯的抑菌用量见下表1:
表1 赤藓糖醇脂肪酸酯在抑菌应用中的适宜用量范围
注:表中的百分比为质量百分比。
作为抑菌/防腐剂,本发明赤藓糖醇脂肪酸酯在食品中的适用量范围,按重量计为0.001-20%,在化妆品中的适用量范围,按重量计为0.001-5%。
实验证明,本发明赤藓糖醇三和四脂肪酸酯具有抑制真菌和细菌生长的特性,可以作为抑菌/防腐剂用于食品及化妆品领域;作为防腐剂添加到食品和化妆品中,能有效防止其腐败,延长它们的货架期。
附图说明
图1是真菌抑菌平板试验,示出赤藓糖醇单-、二-、三-和四-辛酸酯对黑曲霉和米曲霉真菌的抑制作用。图1A中,从左到右,从上到下依次为对照、赤藓糖醇一辛酸酯、二辛酸酯、三辛酸酯、四辛酸酯对黑曲霉的抑制。图1B中,图1B-a和图1B-b分别示出培养1d的赤藓糖醇四辛酸酯和培养1d的赤藓糖醇三辛酸酯对黑曲霉的抑制作用;图1B-c和图1B-d分别示出培养3d的赤藓糖醇四辛酸酯和培养3d的赤藓糖醇三辛酸酯对黑曲霉的抑制作用;图1B-e和图1B-f分别示出培养1d的赤藓糖醇四辛酸酯和培养1d的赤藓糖醇三辛酸酯对米曲霉的抑制作用。
图2是细菌抑菌平板试验,示出赤藓糖醇三及四辛酸酯对芽孢杆菌的抑制作用。图2中,图2-a为培养1d的赤藓糖醇三辛酸酯对芽孢杆菌的抑制;图2-b为培养1d的赤藓糖醇四辛酸酯对芽孢杆菌的抑制。
图3是赤藓糖醇四辛酸酯在花生酱防腐中的应用,示出赤藓糖醇四辛酸酯对花生酱中腐败菌的抑制作用。图3中,图3-a为添加系列糖醇酯的自制花生酱样品;图3-b为培养10d后的添加系列糖醇酯的自制花生酱样品;图3-c和图3-d分别为培养10d的对照1样品和培养10d的对照2样品;图3-e和图3-f分别为培养10d的添加0.25%糖醇酯的样品和培养10d的添加0.5%糖醇酯的样品;图3-g和图3-h分别示出培养10d的添加0.75%糖醇酯的样品和培养10d的添加1.0%糖醇酯的样品。
图4是赤藓糖醇四辛酸酯在馒头防腐中的应用,示出赤藓糖醇四辛酸酯在防止馒头霉变方面的作用。图4中,图4-a示出添加系列糖醇酯的自制馒头样品;图4-b为培养10d后的添加系列糖醇酯的自制馒头样品;图4-c和图4-d分别示出培养10d的对照1样品和培养10d的对照2样品;图4-e和图4-f分别示出培养10d的添加0.5%糖醇酯的样品和培养10d的添加1.5%糖醇酯的样品;图4-g和图4-h分别示出培养10d的添加2.5%糖醇酯的样品和培养10d的添加5%糖醇酯的样品。
具体实施方式
下面结合实施例,进一步阐述本发明。应当理解,这些实施例仅用于举例说明本发明而不用于限制本发明的范围。实施例中所使用的未具体注明来源的物质均为可商业上购得的可食用级或可用于化妆品的商品;未具体注明的实验条件为常规条件或制造厂商所建议的条件。除非另有说明,实施例中的份数和百分比均指重量份数和重量百分比。
I. 赤藓糖醇脂肪酸酯的制备
实施例1:赤藓糖醇三辛酸酯的制备
在装备有磁力搅拌器、分水器及温度计的250mL三口烧瓶中加入赤藓糖醇6.41g,辛酸30.26g和催化剂对甲苯磺酸1.15g,加入70mL正庚烷作带水剂,于115℃保温条件下,反应5小时。反应结束后将反应混合物用水洗涤3次,将有机层减压蒸发,以去除正庚烷,得油状物质;将其溶解于适量乙酸乙酯中,采用碱中和法,加入0.5mol/L的KOH乙醇水溶液(体积比30:70),以除去未反应的辛酸。分出有机层,旋转蒸发除去乙酸乙酯,残余物用甲醇水溶液(甲醇:水:70:30体积比)反复洗涤,分出甲醇水溶液,残余物过硅胶层析柱分离,洗脱剂为石油醚:乙醚:乙酸=60:40:0.5,收集含有赤藓糖醇三辛酸酯的洗脱液,旋转蒸发除去洗脱剂,得赤藓糖醇三辛酸酯。
实施例2:赤藓糖醇三月桂酸酯的制备
在装备有磁力搅拌器、冷凝管、温度计和减压装置的250mL三口烧瓶中加入赤藓糖醇5.97g,月桂酸甲酯41.89g,碳酸钾1.91g和十六烷基三甲基溴化铵1.44g,于压力11KPa和温度110℃,反应5小时。反应结束后将温度降至室温,向得到的反应混合物中加入0.2mol/L盐酸水溶液使呈酸性,静置分层,分出上层固体,用水反复洗至中性,以除去未反应的残余糖醇和水溶性催化剂,以及产生的盐类物质,过滤,滤饼用甲醇洗涤,以除去未反应的月桂酸甲酯及生成的少量赤藓糖醇单、二月桂酸酯,得赤藓糖醇三和四月桂酸酯混合物。将此混合物用石油醚洗涤并过滤,除去生成的少量赤藓糖醇四月桂酸酯,将滤饼真空干燥,得产物赤藓糖醇三月桂酸酯。
实施例3:赤藓糖醇四辛酸酯的制备
在具有磁力搅拌器、分水器及温度计的250mL三口烧瓶中加入赤藓糖醇7.38g,辛酸43.55g和催化剂对甲苯磺酸2.04g,加入80mL甲苯作带水剂,于120℃保温条件下,反应6小时。反应结束后将反应混合物用水洗涤3次,将有机层减压蒸发,以去除甲苯,得油状物质;将其溶解于适量乙酸乙酯中,采用碱中和法,加入0.5mol/L的KOH乙醇水溶液(体积比30:70),以除去未反应的辛酸。分出有机层,旋转蒸发除去乙酸乙酯,残余物用甲醇水溶液(甲醇:水:70:30体积比)反复洗涤,分出甲醇水溶液,残余物过硅胶层析柱分离,洗脱剂为石油醚:乙醚:乙酸=80:20:0.5,收集含有赤藓糖醇四辛酸酯的洗脱液,旋转蒸发除去洗脱剂,得赤藓糖醇四辛酸酯。
实施例4:赤藓糖醇四癸酸酯的制备
在具有磁力搅拌器、分水器及温度计的250mL三口烧瓶中加入赤藓糖醇5.77g,癸酸48.81g和催化剂对甲苯磺酸1.64g,加入70mL正庚烷作带水剂,于110℃保温条件下,反应8小时。反应结束后将反应混合物用水洗涤3次,将有机层减压蒸发,以去除正庚烷,得膏状物质;将其溶解于适量乙酸乙酯中,采用碱中和法,加入0.5mol/L的KOH乙醇水溶液(体积比30:70),以除去未反应的癸酸。分出有机层,旋转蒸发除去乙酸乙酯,残余物用甲醇反复洗涤。得赤藓糖醇三和四癸酸酯混合物,将混合物用石油醚溶解并过滤,滤液经旋转蒸发除去石油醚,得产物赤藓糖醇四癸酸酯,将其真空干燥。
实施例5:赤藓糖醇四月桂酸酯的制备
在具有磁力搅拌器、冷凝管、温度计和减压装置的250mL三口烧瓶中加入赤藓糖醇5.26g,月桂酸甲酯46.15g,碳酸钾2.06g和十六烷基三甲基溴化铵1.61g,于压力12KPa和温度110℃,反应7小时。反应结束后将温度降至室温,将所得粗产物在搅拌下倒入0.2mol/L盐酸水溶液中使混合物呈酸性,充分震荡混合均匀,静置分层;分出下层水溶液,用水将上层固体洗至中性,过滤,滤饼用乙醇洗涤,以除去未反应的月桂酸甲酯及少量赤藓糖醇单、二脂肪酸酯,得赤藓糖醇三和四脂肪酸酯混合物。将混合物用石油醚处理并过滤,滤液经旋转蒸发除去石油醚,得产物赤藓糖醇四月桂酸酯。将其真空干燥。
实施例6:赤藓糖醇四肉豆蔻酸酯的制备
在具有磁力搅拌器、冷凝管、温度计和减压装置的250mL三口烧瓶中加入赤藓糖醇5.27g,肉豆蔻酸甲酯62.72g,碳酸氢钾2.72g和四丁基溴化铵 1.36g,于压力11KPa和温度120℃,反应8小时。反应结束后将温度降至室温,将所得粗产物在搅拌下倒入0.3mol/L盐酸水溶液中使混合物呈酸性,充分震荡混合均匀,静置分层;分出下层水溶液,用水将上层固体洗至中性,过滤,滤饼用甲醇洗涤,以除去未反应的肉豆蔻酸甲酯及少量赤藓糖醇单、二肉豆蔻酸酯,得赤藓糖醇三和四肉豆蔻酸酯混合物。将混合物用石油醚处理并过滤,滤液经旋转蒸发除去石油醚,得产物赤藓糖醇四肉豆蔻酸酯。将其真空干燥。
实施例7:赤藓糖醇四棕榈酸酯的制备
在具有磁力搅拌器、冷凝管、温度计和减压装置的250mL三口烧瓶中加入赤藓糖醇5.73g,棕榈酸甲酯63.41g,碳酸钠2.76g和四丁基溴化铵 2.07g,于压力13KPa和温度125℃,反应6小时。反应结束后将温度降至室温,将所得粗产物在搅拌下倒入0.2mol/L盐酸水溶液中使混合物呈酸性,充分震荡混合均匀,静置分层;分出下层水溶液,用水将上层固体洗至中性,过滤,滤饼用乙醇洗涤,以除去未反应的棕榈酸甲酯及少量赤藓糖醇单、二棕榈酸酯,得赤藓糖醇三和四棕榈酸酯混合物。将混合物用石油醚处理并过滤,滤液经旋转蒸发除去石油醚,得产物赤藓糖醇四棕榈酸酯。将其真空干燥。
II. 赤藓糖醇脂肪酸酯对细菌和真菌的抑制性能测试
实施例8:赤藓糖醇辛酸酯对细菌和真菌的抑制性能测试
1.培养基配方
培养细菌用培养基(LB培养基):称取胰蛋白胨10g、酵母提取物(购自OXOID LP0021)5g、NaCl 5g和琼脂15g,加热溶解,用1mol/L NaOH调节pH至7.4,然后用去离子水定容至1L,121℃灭菌30min,备用;
培养真菌用培养基:马铃薯培养基(简称PDA),马铃薯去皮,称取200g,切成块煮沸30min,然后用纱布过滤,再加葡萄糖20g和琼脂15g,融化后补足水至1L,121℃灭菌30min,备用。
2.供试菌种
细菌:大肠杆菌(Eschericheae coli.)菌种保藏号ACCC10134、枯草芽孢杆菌(Bacillus subtilis)菌种保藏号ACCC 01197;
真菌:黑曲霉(Aspergillus niger)菌种保藏号ACCC 30117、米曲霉(Aspergillus oryzae)菌种保藏号ACCC 30163;
以上菌种均购自中国农业微生物菌种保藏管理中心。
3.实验方法
3.1实验菌种的活化
将斜面培养基上的大肠杆菌、枯草芽孢杆菌接种到150mL三角瓶中的LB培养基中,在摇床中以120r/min的转速和37℃的温度下活化培养24小时后,移出1mL菌液,将其在相同条件下重复培养相同时间,得到初始菌液;
把斜面培养基上的黑曲霉和米曲霉菌种转移接种到马铃薯培养基斜面上,在28℃下培养2天,挑取该马铃薯培养基斜面上的菌种再接种到另一同样的马铃薯培养基斜面上,在28℃下培养2天,得到活力较高的菌种。
3.2细菌抑制试验
抑菌圈试验:在无菌条件下,于LB培养基平板中接种0.1mL的培养处于生长对数期的供试菌液,用涂布棒将其涂布均匀,然后在平板中间放一张用赤藓糖醇辛酸酯液浸渍的滤纸片,在37℃培养箱中培养1d(天),观察抑菌效果。见图2。
3.3真菌抑制试验
[试验1] 平板涂布法:在无菌条件下,于PDA培养基平板中将各赤藓糖醇辛酸酯加入到平板表面并涂布均匀,然后用接种环挑取已经产生孢子的真菌,在平板上划线,28℃培养箱中培养,观察其抑菌效果。见图1A;
[试验2] 用无菌丙二醇,将赤藓糖醇三或四辛酸酯配置成浓度为0.5、5.0mg/mL的丙二醇溶液。其中抑制米曲霉和黑曲霉实验中分别移取0.5mL上述浓度的赤藓糖醇辛酸酯溶液及丙二醇于平板中,涂布均匀,划线接种,28℃培养观察菌体生长。结果见图1B。
4. 实验结果分析
(1)抑制真菌结果分析:图1A示出涂布有0.5mL 浓度为0.5mg/mL的赤藓糖醇单、二、三及四辛酸酯丙二醇溶液的培养基平板培养24小时的试验1抑菌结果。由图1A可知,含赤藓糖醇单、二辛酸酯的平板中沿划线接种部位均有黑曲霉菌株生长,而含有赤藓糖醇三辛酸酯的平板中仅有几个菌斑,含赤藓糖醇四辛酸酯的平板沿划线部位无明显黑曲霉菌株生长,表明赤藓糖醇三和四辛酸酯对黑曲霉抑制效果最好,由此又对赤藓糖醇三及四辛酸酯的抑菌性作进一步考察(试验2);
试验2表明,添加有赤藓糖醇三辛酸酯和赤藓糖醇四辛酸酯的平板均表现出抑制米曲霉和黑曲霉的作用。当培养24h时,低浓度0.5mg/mL的平板中有菌株生成,而5mg/mL高浓度的平板中均看不到菌株。将黑曲霉样品继续培养至72h时,对照(不含赤藓糖醇辛酸酯)和0.5mg/mL浓度的平板中黑曲霉菌株明显有生长痕迹,而5mg/mL浓度赤藓糖醇四辛酸酯的平板仍没有菌株生成,但含相同浓度的赤藓糖醇三辛酸酯的平板中有少量斑点。由此可见,赤藓糖醇四辛酸酯抑制真菌生长的效果更佳;
(2)抑制细菌结果分析:
由图2可知,含赤藓糖醇三辛酸酯的平板中滤纸周围有一小圈,表明赤藓糖醇三辛酸酯对芽孢杆菌有一定的抑制作用,其效力优于赤藓糖醇四辛酸酯。
取上述抑菌(细菌、真菌)实验最终的物质进行分析,未发现赤藓糖醇酯的水解产物(赤藓糖醇);所以可以确定,是赤藓糖醇酯发挥的抑菌功效。
实施例9:不同赤鲜糖醇四脂肪酸酯的抑菌性能测试
霉菌孢子悬液的制备:用接种环挑取4-5环培养5d左右的霉菌孢子于10mL带无菌玻璃珠的无菌水中制成1011~12 cfu /L均匀的孢子悬液;
涂布培养:称取定量的各赤藓糖醇四脂肪酸酯,分别加入到一定体积已融化的无菌土豆固体培养基中,60℃无菌条件下均质、静置冷却,待凝固后即得含各赤藓糖醇四脂肪酸的不同浓度的供试样品平板。然后用无菌移液枪移取0.1mL上述菌悬液注入各平板,涂布均匀,于28℃条件下培养3d。观察菌体生长情况。结果列于下表2和3中:
表2 赤藓糖醇四脂肪酸酯对米曲霉的抑制作用
表3 赤藓糖醇四脂肪酸酯对黑曲霉的抑制作用
注:C8为赤鲜糖醇四辛酸酯;C10为赤藓糖醇四癸酸酯;C12为赤藓糖醇四月桂酸酯;C14为赤鲜糖醇四肉豆蔻酸酯;C16为赤鲜糖醇四棕榈酸酯。生长菌体为阳性( + ),不生长菌体为阴性( - )。
由表2和3可见,脂肪酸碳链在8-16的赤藓糖醇四脂肪酸酯对米曲霉和黑曲霉均有一定抑菌效果。对米曲霉的抑菌测试中,C8和C12表现出较好的抑菌作用,最小抑菌浓度为8.3ppm。C10的最小抑菌浓度为16.1 ppm、C14和C16相当,均为32.4ppm。而对黑曲霉的抑菌作用,C8仍具有最好的抑菌效果,最低抑菌浓度为4.2 ppm。而C10、C12和C14的抑菌浓度为16.1 ppm,C16的最低抑菌浓度为32.4ppm。
III. 赤藓糖醇脂肪酸酯抑菌应用实例
抑菌实例1: 赤藓糖醇四辛酸酯对花生酱的防腐作用
花生酱配方(质量%):
粉碎烘焙全脂花生85.0、蔗糖3.27、葡萄糖2.0、奶粉5.0、食盐1.2、氢化植物油1.5、单、双硬脂酸甘油酯2.0 赤藓糖醇四辛酸酯 适量;
花生酱制作:
①将粉碎烘焙花生与氢化植物油及单双硬脂酸甘油酯混合,然后添加甜味剂蔗糖和葡萄糖及食盐和奶粉。②将上述物料在60℃的温度中充分混合,得到均匀的分散体。③将此分散体放入搅拌器,保温45℃,以转速8-10r/min搅拌一定时间待粘度为1.84Pa.s,停止搅拌,冷却至室温,制得备用花生酱。
于第③步中取6等份备用花生酱,每份200g,放入200mL烧杯中,以0、100、500、1000、2000、3000ppm的浓度分别加入赤藓糖醇四辛酸酯,混合均匀。所制得的花生酱呈黄褐色,色泽均匀;花生香味浓郁,呈均匀粘稠膏状,组织细腻。上述样品于28℃恒温条件下放置10d,观察样品变化,结果见表4:
表4 赤藓糖醇四辛酸酯对花生酱的防腐作用
注:“-”表示花生酱表面看不到明显变化,为未霉变;“+”花生酱表面发白,有霉变斑点,但表面下部颜色正常,为一般霉变;“++”表示花生酱表面霉变严重,表面以下颜色加深,伴有不愉快气味,为完全霉变。
抑菌实例2:赤藓糖醇四月桂酸酯对海绵蛋糕的防腐作用
海绵蛋糕配方:小麦面粉100g,鸡蛋300g 白砂糖100g 植物油20g 泡打粉2.0g 赤藓糖醇四月桂酸酯 适量;
海绵蛋糕制作:1.将鸡蛋打在一个干净的盆里,加入白砂糖。用电动打蛋器高速打至蛋糊逐渐起泡,3min后改用低速打到体积增大至3-4倍,并继续打至蛋糊变得浓粘稠为止。2.将面粉和泡打粉混合拌匀并直接过筛入蛋糊内,用刮刀轻快地上下翻拌均匀,将粉全部分散到蛋糊中至无面粉颗粒为止。3.接着沿容器边缘分2次倒入植物油,同样用刮刀轻快地上下翻拌均匀,使油完全分散至蛋糕糊中。4.取干净蛋糕模具涂点油,放入烤箱170℃预热5min,拿出蛋糕模倒入蛋糕糊。于170℃上下烘烤40min。
按上述制作方法,以面粉质量计,分别加入0(对照)、100、1000、2000、3000、5000ppm的赤藓糖醇四月桂酸酯于上述蛋糕配方中,制作海绵蛋糕。将蛋糕样品置于温度28℃,湿度70%培养箱中观察蛋糕的变化。当赤鲜糖醇四月桂酸酯添加量为2000-5000ppm时可有效防止蛋糕霉变,并保持蛋糕松软、有弹性的特征,与对照组相比,7d内无霉变现象,可延长蛋糕储存期3-4d。
抑菌实例3:赤藓糖醇三月桂酸酯对甜八宝粥的防腐作用
材料:糯米150g,赤小豆100g,葡萄干50g,花生仁50g,莲子50g,松子50g,红枣干50g,桂圆50g,白砂糖200g;
甜八宝粥制作: 1.糯米洗净,用冷水浸泡1h,捞出,沥干水分;2.糯米放入锅中,加适量冷水煮熟取出备用;3. 赤小豆、花生仁、莲子洗净,分别用冷水浸泡回软,放入锅中,加适量冷水煮至熟软;4.加入糯米粥及桂圆、红枣、松仁煮至浓稠状;5.加入葡萄干及白砂糖,搅拌均匀,续煮15分钟,即可。
取5等份制得的甜八宝粥,分别加入0%(对照)、0.1%、0.2%、0.4 %、0.8%的赤藓糖醇三月桂酸酯,室温放置10d,发现赤藓糖醇三月桂酸酯添加量为0.2~0.8%时,对防止甜八宝粥腐败有很好效果,可延长储存期4~5d。
抑菌实例4:赤藓糖醇三辛酸酯对杏仁奶茶的防腐作用
配料:杏仁200克,白砂糖200克,牛奶250克,清水400g;
杏仁奶茶制作: 1.杏仁去皮,研磨为细粉;2.杏仁、白砂糖、牛奶加清水适量,过滤后烧开即可,装杯密封。
取5等份制得的杏仁奶茶,分别加入0%(对照)、0.05%、0.15%、0.3%、0.45%的赤藓糖醇三辛酸酯,室温放置15d。赤藓糖醇三辛酸酯添加量为0.15~0.45%时,可有效延长饮料的保存期,对照组样品8d已变质,15d时,赤藓糖醇三辛酸酯添加量为0.05%和0.15%的样品,局部颜色变深,而添加0.3%和0.45%赤藓糖醇三辛酸酯的样品外观和风味基本不变。
抑菌实例5:赤藓糖醇四月桂酸酯对面包的防腐作用
面包的制作
基本原料配方:面包专用粉500g,酵母5g,油脂45g,盐3.5g,糖100g,奶粉5g,水275g;
制作工艺:按一次发酵法制作,准确称量好各种原料加水搅拌到面团形成后静置10 min→分割成型→静置5 min→整形→醒发(温度35℃、60 min)→烘烤15 min (上火180℃、底火210℃)→出炉。
按面粉用量计算,分别在调粉时加入0%(对照)、0.05%、0.15%、0.25%、0.35%的赤藓糖醇四月桂酸酯。烘焙结束,使供试面包自然冷凉,然后置于温度28℃、湿度50%的培养箱中,观察面包的变化。
当赤藓糖醇四月桂酸酯添加量为0.15-0.35%时,能有效防止面包霉变。与未加赤藓糖醇四月桂酸酯的对照组相比,添加赤藓糖醇四月桂酸酯的面包能较长时间内保持细腻、有弹性的特征,储存至10天内无霉变现象,而对照组面包第4天发生霉变。结果见表5:
表5 赤藓糖醇四月桂酸酯对面包的防腐效果
注:“—”表示面包表面看不到菌丝生长,内瓤不见起丝,为未霉变;“+”表示面包表面有霉斑,但内瓤未见起丝,为一般霉变;“++”表示面包表面霉变严重,内瓤可见菌丝,为完全霉变。
抑菌实例6:赤藓糖醇四辛酸酯对酥皮豆沙包的防腐作用
配料:猪油 25g,低筋面粉100g,水45g,新鲜豆沙200g,鸡蛋100g,黑芝麻20g;
酥皮豆沙包制作:1.将面粉和成团 2.将面团平均分成八等分制成水油面皮;3.取4组两个水油面皮(两个一组,通过两个水油面皮的反复折叠形成酥皮),并按面皮质量(干基)计,添加0%(对照)、0.1%、0.25%、0.4%赤藓糖醇四辛酸酯,叠加,擀平,重复操作3次;4.放上20g豆沙馅,包好整型即可;5.全部包好后,表面刷蛋黄液,撒上黑芝麻,置于烤箱中层,150℃烤25min即可。
将得到的酥皮豆沙包置于温度28℃、湿度50%的培养箱中观察,结果如下:
表6赤藓糖醇四辛酸酯对酥皮豆沙包的防腐作用
注:“—”表示表面看不到菌丝生长,内瓤不见起丝,为未霉变;“+”表示表面有霉斑,但内瓤未见起丝,为一般霉变;“++”表示表面霉变严重,内瓤可见菌丝,为完全霉变。
抑菌实例7:赤藓糖醇四癸酸酯对自制川味香肠的防腐作用
材料:猪腿肉5000g,猪小肠1副,辣椒面50g,花椒面60g,胡椒面30g,盐40g,姜50g,白糖100g,料酒30g,味精20g;
川味香肠制作: 1.将猪小肠涂上粗盐反复搓洗3次,用竹片轻刮去表面污物;2.将猪腿肉切成块状或者条状;3. 将切好的肉块或肉条涂上辣椒面、花椒面、胡椒面、盐、姜末、白糖、料酒、味精和匀;4.将调好味的肉块或肉条装入小肠,颠实压紧,每一小节用细线扎紧。
取5等份上述调好味的肉块或肉条,分别加入0%(对照)、0.15%、0.35%、0.55%、1.0%的赤藓糖醇四癸酸酯混匀,装入小肠,颠实压紧,每一小节用细线扎紧,上锅蒸熟。30℃培养箱放置7d,发现对照样品放置4d发粘有异味,赤藓糖醇四癸酸酯添加量在0.35~1.0%的样品在7d内没有明显变化。
抑菌实例8:赤藓糖醇四棕榈酸酯对甜辣面酱的防腐作用
材料:豆瓣100g,花生酱100g,甜面酱200g,蚝油1勺,胡椒粉,冰糖,蒜末,葱末,30g 干红辣椒20g,香醋5g,赤藓糖醇四棕榈酸酯 适量;
甜辣面酱制作:1.把豆瓣剁成蓉与花生酱、甜面酱、蚝油一起装入盆中,搅拌成混合料。2.烧锅,倒油,先下蒜末、葱末、辣椒末炒香,将混合料倒入锅中,用小火,用锅铲慢慢推匀。3.等锅中冒出均匀小泡,放入胡椒粉、冰糖、香醋拌匀即可,自然冷却后装入瓶罐密封。
分别称取5等份按上述制得的甜辣面酱,置于5个150mL三角瓶中,添加0%(对照)、0.25%、0.5%、0.75%、1.0%的赤藓糖醇四棕榈酸酯,室温放置,对照样品5d发生霉变,8d时赤藓糖醇四棕榈酸酯添加量为0.25%的样品表层颜色加深,10d时有少量霉斑,而赤藓糖醇四棕榈酸酯添加量在0.5%、0.75%、1.0%的样品,10d表层没有明显变化。
抑菌实例9:赤藓糖醇四癸酸酯对白奶酪的防腐作用
将5L鲜牛奶过滤除杂后于65℃加热煮30min,往奶中加入300mL酸奶作为发酵剂使奶发酵,当奶发酵变成浆糊状时倒入锅中煮1-2h,待奶汁变成白色半固体状时,在纱布中挤压去水份。
取5等份挤压后的白色固体,分别加入0%(对照)、0.15%、0.25%、0.4%、0.6%的赤藓糖醇四癸酸酯混合均匀,装模成形,室温干燥2d,置于4℃冰箱24h,即得供试白奶酪。
将样品置于30℃、湿度70%的恒温恒湿箱中观察奶酪的变化。发现对照样品放置6d,奶酪颜色加深,表面有霉斑,赤藓糖醇四癸酸酯添加量为0.15%的样品,9d时发生霉变,而赤藓糖醇四癸酸酯添加量在0.25-0.6%的样品在10d内基本不变。
抑菌实例10:赤藓糖醇四辛酸酯对苹果乳饮料的防腐作用
取新鲜苹果浆500g,全脂奶粉50g,乳化剂5g、香精0.1g,白糖80g分别溶于水。将它们加入配料缸内,加水至1500mL。
取5等份上述制得的苹果乳饮料,分别加入0%(对照)、0.1%、0.25%、0.4%、0.55%的赤藓糖醇四辛酸酯,混合均匀,加热到85℃,均质,装罐。
30℃开盖放置,观察苹果乳饮料变化。初始样品体系均一,果粒清晰,有苹果和奶香味。对照组样品4d时体系分层,果粒上浮颜色加深,5d时表面有黑色斑点。赤藓糖醇四辛酸酯添加量为0.1%的样品,7d时也有相同变化。而赤藓糖醇四辛酸酯添加量在0.25-0.55%的样品,能有效防止饮料变质,储存11d没有明显变质的现象。
抑菌实例11:赤藓糖醇四月桂酸酯对雪花膏的防腐作用
[配方]硬脂酸 8.0 硬脂醇 4.0 硬脂酸丁酯 6.0 丙二醇 5.0 单硬脂酸甘油酯 2.0氢氧化钾 0.4 赤藓糖醇四月桂酸酯 适量 抗氧化剂 0.2 香料0.2 精制水 74.2,按重量计;
[雪花膏制作]1.将丙二醇、氢氧化钾加入到精制水中,于70℃加热溶解,制得水相;2.将硬脂酸、硬脂醇、硬脂酸丁酯于70℃加热熔化后,加入单硬脂酸甘油酯、赤藓糖醇四月桂酸酯、抗氧化剂和香料,在70℃混匀,制得油相;3.将此油相加入到水相中进行预乳化,用均质机将乳化粒子均一后,脱气,过滤,冷却。
按上述配方配制系列雪花膏样品,其中赤藓糖醇四月桂酸酯添加比例为0%(对照),0.1%,0.25%,0.4%,0.55%,室温放置12d,赤藓糖醇四月桂酸酯添加比例为0%的对照样品,乳化体系被破坏,有霉斑出现,15d时,赤藓糖醇四月桂酸酯添加比例为0.1%的样品表面有黄斑,而赤藓糖醇四月桂酸酯添加比例为0.25-0.55%的样品在20d内没有明显变化。
抑菌实例12:赤藓糖醇四癸酸酯对含氨基酸的柔软霜的防腐作用
[配方] 油组分: 液体石蜡 28.0 微晶蜡 2.0 凡士林 5.0 二聚甘油二油酸酯 5.0 赤藓糖醇四癸酸酯 适量 香料0.3; 水相(1):L-谷氨酸钠 1.6 L-丝氨酸 0.4 精制水 13.0; 水相(2):丙二醇 3.0 精制水41.7,按重量计;
[柔软霜制作] 1.将水相(1)在50℃加热溶解后,搅拌下逐渐加入到同样加热至50℃的二聚甘油二油酸酯中,制成氨基酸凝胶。2.将其余的油组分在70℃加热溶解后,再向其中加入该氨基酸凝胶,使其分散均匀。3.将水相(2)在70℃加热后,也在充分搅拌下加至上述的分散液中,使用均质机将其均一乳化后,脱气,过滤,冷却至30℃。
按上述配方制备的含氨基酸的柔软霜,赤藓糖醇四癸酸酯添加量分别为0%(对照),0.2%,0.4%,0.6%,0.8%。室温放置10d,对照样品颜色变深,发生霉变且伴有难闻酸味,而含0.2-0.8%赤藓糖醇四癸酸酯的样品16d内无明显变化。
抑菌实例13:赤藓糖醇四辛酸酯对紧肤可可乳的防腐作用
配方:A相:十八烷醇2.5 可可粉6.0;B相:异硬脂酸异丙酯5.0;C相:聚山梨醇酯-80 25.0 环甲基硅氧烷 3.0 汉生胶 0.2;D相:二甲基硅油1.0;E相:香精0.3,去离子水57.0,按重量计;
可可乳制作:加热A相至70℃,不用搅拌将A相混入B相,均质,并缓慢冷却至60℃。将C相组分混合,然后加入AB混合相,搅拌均匀。再加入D相和E相组分,搅拌均匀即得备用紧肤可可乳。
取5等份上述备用紧肤可可乳,分别添加0%(对照),0.15%,0.35%,0.55%,0.75%的赤藓糖醇四辛酸酯,室温下,对照样品17d变质,有黑色斑点,并有异味。22d 时,赤藓糖醇四辛酸酯添加量在0.15%的样品表面成白色,有絮状物。而赤藓糖醇四辛酸酯添加量在0.35~0.75%的样品,26d内没有变化。
抑菌实例14:赤藓糖醇四肉豆蔻酸酯对发乳的防腐作用
[配方] 油相:羊毛酸异丙酯2.0 蜂蜡5.0 白油56.4 豆蔻酸异丙酯2.0 地蜡2.0 赤藓糖醇四肉豆蔻酸酯 适量 ;水相:硼砂0.6 香精0.3 抗氧剂0.2 去离子水31.5;
[发乳制法]:1.将水相中的去离子水,硼砂加热至80℃;2.将油相和抗氧剂加热至80℃,将水相加入至该油相中,同时用框式搅拌桨进行搅拌。45℃时加入香精,至40℃时停止搅拌,检测乳化稳定度合格后,隔天即可包装。
按上述配方制得的发乳样品中,分别加入了赤藓糖醇四肉豆蔻酸酯0%(对照),0.25%,0.50%,0.75%,1.0%。将它们室温放置,赤藓糖醇四肉豆蔻酸酯添加量为0%和0.25%的样品,14d均有霉变发生,而赤藓糖醇四肉豆蔻酸酯的添加量在0.5~1.0%的样品,25d内无霉变现象。
抑菌实例15:赤藓糖醇四辛酸酯对花生酱的防腐作用
按抑菌实例1制作新鲜花生酱200g,分别称取20g该酱于6个50mL离心管中,其中2个为对照,其余以管中花生酱重量计分别加入0.25%、0.5%、0.75%、1.0%的赤藓糖醇四辛酸酯,开盖室温放置,观察花生酱品质变化。
室温放置6d时,对照管中花生酱表面已有少量白色及黄色斑点生成,而其它管中没有明显变化。继续放置达10d时,对照管中有很多黄色霉菌生成,伴有恶臭味。而其它管中没有显著菌株生成,只是表面颜色稍白,没有明显的臭味。可见赤藓糖醇辛酸酯对花生酱中腐败菌有明显的抑制作用,结果见图3。
抑菌实例16:赤藓糖醇四辛酸酯对馒头的防腐作用
称取600g面粉,称取以面粉重量计为0.25%的酵母粉溶于适量水后与面粉混合,搅拌均匀。于40℃发酵1.5h,取出切块。称取6块100g面团,其中2个为对照,其余4个,以面团质量计,分别加入0.5%、1.5%、2.5%、5%的赤藓糖醇四辛酸酯,混合均匀后搓圆,室温醒发20分钟,于蒸锅中蒸20min,得新鲜馒头。室温放置观察馒头品质变化。
当新鲜馒头室温放置10d时,对照馒头已发黑,霉斑明显,腐败严重。而加有赤藓糖醇四辛酸酯的馒头,除赤藓糖醇四辛酸酯添加量为0.5%的馒头发霉稍严重外,其它均较少,只有个别霉斑,可能与赤藓糖醇四辛酸酯在馒头中混合不均匀有部分关系。可见赤藓糖醇辛酸酯对防止馒头霉变有明显效果,结果见图4。
上述赤藓糖醇脂肪酸酯在食品、饮料和化妆品中的抑菌、防腐应用实验表明,本发明赤藓糖醇脂肪酸酯对真菌和细菌具有一定的抑菌作用,是良好的抑菌剂,可以作为抑菌剂/防腐剂添加到食品、饮料或化妆品中,用于这些领域目标产品的防腐,可有效防止它们的腐败,延长其货架期。
Claims (5)
1.具有下述通式(I)结构的赤藓糖醇脂肪酸酯作为抑菌剂的应用:
其中R1、R2、R3、R4相同或不同,各自独立地表示氢原子或脂肪酸残基,并且R1、R2、R3、R4中至少有三个不为氢原子,所述脂肪酸残基选自2-28个碳原子的直链或支链、饱和或不饱和的脂肪族一元羧酸或多元羧酸残基。
2.权利要求1的应用,其中所述脂肪酸残基选自4-22个碳原子的直链或支链、饱和或不饱和的脂肪族一元羧酸或多元羧酸残基。
3.权利要求1的应用,其中所述脂肪酸残基选自6-18个碳原子的直链或支链、饱和或不饱和的脂肪族一元羧酸或多元羧酸残基。
4.权利要求1的应用,其中所述脂肪酸残基选自8-16个碳原子的直链或支链、饱和或不饱和的脂肪族一元羧酸或多元羧酸残基。
5.权利要求1的应用,其中所述赤藓糖醇脂肪酸酯选自由下述赤藓糖醇脂肪酸酯组成的物组:赤藓糖醇三己酸酯、赤藓糖醇四己酸酯、赤藓糖醇三庚酸酯、赤藓糖醇四庚酸酯、赤藓糖醇三辛酸酯、赤藓糖醇四辛酸酯、赤藓糖醇三癸酸酯、赤藓糖醇四癸酸酯、赤藓糖醇三月桂酸酯、赤藓糖醇四月桂酸酯、赤藓糖醇三肉豆蔻酸酯、赤藓糖醇四肉豆蔻酸酯、赤藓糖醇三棕榈酸酯、赤藓糖醇四棕榈酸酯、赤藓糖醇三硬脂酸酯和赤藓糖醇四硬脂酸酯。
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