CN109988375A - 一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜及加工方法 - Google Patents

一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜及加工方法 Download PDF

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CN109988375A
CN109988375A CN201711484840.XA CN201711484840A CN109988375A CN 109988375 A CN109988375 A CN 109988375A CN 201711484840 A CN201711484840 A CN 201711484840A CN 109988375 A CN109988375 A CN 109988375A
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程艳青
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Abstract

本发明及一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜及加工方法，原料包括：PVC树脂、玉米醇溶蛋白、碳酸钙、钛白粉、氯丁橡胶、硬脂酸甘油酯、乙酰丙酮、环氧大豆油、增塑剂、ACR增韧剂、Mbs、液体无毒钡锌复合稳定剂、铝酸酯偶联剂、液体石蜡、颜色或色母料适量。本发明避免了对环境的污染，由于玉米醇溶蛋白具有独特的成膜性，玉米醇溶蛋白中富含含硫氨基酸，蛋白质分子间以较强的二硫键、疏水键相连，这是玉米醇溶蛋白易于形成薄膜的基础，当浓度超过一定值时，蛋白质凝聚，分子间形成维持薄膜网状结构的氢键、二硫键及疏水键，形成透明、有光泽的玉米醇溶蛋白膜。

Description

一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜及加工方法
技术领域
本发明涉及一种薄膜的加工方法，特别是涉及一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜及加工方法。
背景技术
农业用薄膜使用很普遍，但目前的塑料薄膜大多仍然是不可降解的塑料薄膜，因此对环境造成污染，虽然目前有可降解的薄膜，但造价高，不便普及使用。
发明内容
本发明的目的就是针对上述问题，提供一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜及加工方法。
本发明所采用的技术方案是：
一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜，其特征在于：按下列重量份配置而成：PVC树脂100份，玉米醇溶蛋白 20～40份，碳酸钙5～15份，钛白粉3～10份，氯丁橡胶5～8份，硬脂酸甘油酯 0.5～0.8份，乙酰丙酮铁2.5～5份，环氧大豆油5～8份，dbp增塑剂10～20份，ACR增韧剂1～2份，Mbs3～8份，液体无毒钡锌复合稳定剂0.5～2份，铝酸酯偶联剂0.2～0.5份，液体石蜡0.2～1.0份，颜色或色母料适量。
一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜的加工方法，其特征在于：包括下列加工步骤：
（1）将PVC树脂、色母料、玉米醇溶蛋白放入可控温的混料机内，常温搅拌10～20分钟，保证材料搅拌均匀；
（2）将温度调整到55~65℃，转速调到100～200r/min，将氯丁橡胶、硬脂酸甘油酯、乙酰丙酮铁、环氧大豆油依次加入，加入时间10～20min，然后温度稳定后持续搅拌20～30min；
（3）温度升高到75~85℃左右，提高转速到150～250r/min，dbp增塑剂、ACR增韧剂、Mbs、液体无毒钡锌复合稳定剂、铝酸酯偶联剂，加入时间15～30min，加入完毕后持续搅拌30～50min；
（4）将温度提高到95~100℃，然后淋入液体石蜡，淋入时间20～30min，保持转速200～300r/min，淋入后继续搅拌20～30min；
（5）升温到110℃左右，依次加入碳酸钙、钛白粉保持转速200～300r/min，加入后继续搅拌20～30min，然后调低转速，将料排出送入冷混机内；
（6）速度调整到100～200r/min，冷混至料温40℃左右，静置2小时后，即可进行薄膜生产使用。
本发明的有益效果：本发明由于无毒可降解，避免了对环境的污染，是一种绿色环保薄膜。由于玉米醇溶蛋白具有独特的成膜性，玉米醇溶蛋白中富含含硫氨基酸，蛋白质分子间以较强的二硫键、疏水键相连，这是玉米醇溶蛋白易于形成薄膜的基础，当成膜液涂布以后，随着溶剂的挥发，薄膜脱水、干燥使得膜形成液中蛋白质浓度增大。当浓度超过一定值时，蛋白质凝聚，分子间形成维持薄膜网状结构的氢键、二硫键及疏水键，形成透明、有光泽的玉米醇溶蛋白膜。
具体实施方式
实施例：
一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜，其特征在于：按下列重量份配置而成：PVC树脂100份，玉米醇溶蛋白 20～40份，碳酸钙5～15份，钛白粉3～10份，氯丁橡胶5～8份，硬脂酸甘油酯 0.5～0.8份，乙酰丙酮铁2.5～5份，环氧大豆油5～8份，dbp增塑剂10～20份，ACR增韧剂1～2份，Mbs3～8份，液体无毒钡锌复合稳定剂0.5～2份，铝酸酯偶联剂0.2～0.5份，液体石蜡0.2～1.0份，颜色或色母料适量。
一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜的加工方法，其特征在于：包括下列加工步骤：
（1）将PVC树脂、色母料、玉米醇溶蛋白放入可控温的混料机内，常温搅拌10～20分钟，保证材料搅拌均匀；
（2）将温度调整到55~65℃，转速调到100～200r/min，将氯丁橡胶、硬脂酸甘油酯、乙酰丙酮铁、环氧大豆油依次加入，加入时间10～20min，然后温度稳定后持续搅拌20～30min；
（3）温度升高到75~85℃左右，提高转速到150～250r/min，dbp增塑剂、ACR增韧剂、Mbs、液体无毒钡锌复合稳定剂、铝酸酯偶联剂，加入时间15～30min，加入完毕后持续搅拌30～50min；
（4）将温度提高到95~100℃，然后淋入液体石蜡，淋入时间20～30min，保持转速200～300r/min，淋入后继续搅拌20～30min；
（5）升温到110℃左右，依次加入碳酸钙、钛白粉保持转速200～300r/min，加入后继续搅拌20～30min，然后调低转速，将料排出送入冷混机内；
（6）速度调整到100～200r/min，冷混至料温40℃左右，静置2小时后，即可进行薄膜生产使用。
玉米醇溶蛋白是由平均分子量为25000~45000的蛋白质组成的混合物，它受肽主链上的羟基与亚氨基的氢键作用，形成α-螺旋体；有底表面能，具有独特的成膜特性。在醇水溶液中，成无规则线团结构，但溶剂蒸发后成一种透明、有光泽的薄膜，具有防潮、隔氧、抗紫外线、保香、阻油、防静电等特性。单纯的玉米醇溶蛋白膜脆性很大，限制了其用途。但是，如果在其中加人交联剂(如柠檬酸、甲醛、丁烷四甲酸等)，其抗张强度能够提高2～3倍。在玉米醇溶蛋白中加入酯类化合物进行修饰，可以提高其抗张强度，减低其通透性，也可在其中加入抗菌剂以抑制病原微生物的生长。以玉米醇溶蛋白为原料的生物可降解塑料有2种类型：一种是以淀粉一玉米醇溶蛋白为基质，另一种是在玉米醇溶蛋白中加入脂肪酸塑化。
玉米醇溶蛋白具有独特的成膜性。玉米醇溶蛋白中富含含硫氨基酸，蛋白质分子间以较强的二硫键、疏水键相连，这是玉米醇溶蛋白易于形成薄膜的基础，当成膜液涂布以后，随着溶剂的挥发，薄膜脱水、干燥使得膜形成液中蛋白质浓度增大。当浓度超过一定值时，蛋白质凝聚，分子间形成维持薄膜网状结构的氢键、二硫键及疏水键，形成透明、有光泽的玉米醇溶蛋白膜。

Claims (2)

1.一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜，其特征在于：按下列重量份配置而成：PVC树脂100份，玉米醇溶蛋白 20～40份，碳酸钙5～15份，钛白粉3～10份，氯丁橡胶5～8份，硬脂酸甘油酯 0.5～0.8份，乙酰丙酮铁2.5～5份，环氧大豆油5～8份，dbp增塑剂10～20份，ACR增韧剂1～2份，Mbs3～8份，液体无毒钡锌复合稳定剂0.5～2份，铝酸酯偶联剂0.2～0.5份，液体石蜡0.2～1.0份，颜色或色母料适量。
2.一种无毒可降解pvc玉米醇溶蛋白缠绕薄膜的加工方法，其特征在于：包括下列加工步骤：
（1）将PVC树脂、色母料、玉米醇溶蛋白放入可控温的混料机内，常温搅拌10～20分钟，保证材料搅拌均匀；
（2）将温度调整到55～65℃，转速调到100～200r/min，将氯丁橡胶、硬脂酸甘油酯、乙酰丙酮铁、环氧大豆油依次加入，加入时间10～20min，然后温度稳定后持续搅拌20～30min；
（3）温度升高到75～85℃左右，提高转速到150～250r/min，加入dbp增塑剂、ACR增韧剂、Mbs、液体无毒钡锌复合稳定剂、铝酸酯偶联剂，加入时间15～30min，加入完毕后持续搅拌30～50min；
（4）将温度提高到95～100℃，然后淋入液体石蜡，淋入时间20～30min，保持转速200～300r/min，淋入后继续搅拌20～30min；
（5）升温到110℃左右，依次加入碳酸钙、钛白粉保持转速200～300r/min，加入后继续搅拌20～30min，然后调低转速，将料排出送入冷混机内；
（6）速度调整到100～200r/min，冷混至料温40℃左右，静置2小时后，即可进行薄膜生产使用。
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CN116003976A (zh) * 2022-12-30 2023-04-25 江苏兴亚塑料科技有限公司 一种高性能纳米级可降解缠绕膜、制备方法及其膜支架

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CN101775179A (zh) * 2009-01-13 2010-07-14 王金焕 可降解聚氯乙烯薄膜及其制备方法
WO2013029018A1 (en) * 2011-08-24 2013-02-28 Algix, Llc Macrophyte-based bioplastic
CN105440324A (zh) * 2015-12-16 2016-03-30 合肥中澜新材料科技有限公司 一种高强度耐热疏水改性淀粉pvc复合降解塑料及其制备方法

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CN101775179A (zh) * 2009-01-13 2010-07-14 王金焕 可降解聚氯乙烯薄膜及其制备方法
WO2013029018A1 (en) * 2011-08-24 2013-02-28 Algix, Llc Macrophyte-based bioplastic
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116003976A (zh) * 2022-12-30 2023-04-25 江苏兴亚塑料科技有限公司 一种高性能纳米级可降解缠绕膜、制备方法及其膜支架

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