CN111793332A - 一种生物可降解膜材料 - Google Patents
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Abstract
本发明属于生物降解材料技术领域,涉及一种生物可降解膜材料。该膜材料,包括PBAT 60~90份、PLA/PBS 5~15份、改性淀粉3~8份、改性生物钙粉10~30份、EAA 2~10份、分散剂0.1~1份、扩链剂0.1~1份、芥酸酰胺0.1~1份、表面活性剂0.1~1份、甘油/硅油1~5份。该膜材料,绿色环保可降解,减少对环境的污染,生物分解率高,强度高,成本低。
Description
技术领域
本发明属于生物降解材料技术领域,涉及一种生物可降解膜材料。
背景技术
现代农业生产过程中,常采用地膜覆盖的方式改善农作物的生长环境。地膜覆盖的方式具有诸多优点,如,有效提高农作物对光、温、水、肥和土地的利用率,促进植物的生长,促进农作物增产。传统生活用各种包装袋给人们带来了诸多方便,但随生活垃圾弃掉回收很难,给环境造成了严重污染,随着地膜以及包装膜的普遍利用,也带来了包装膜和地膜残留对于农业生态环境造成的白色污染,目前使用的包装膜和地膜以化纤为原料,其主要成分是聚乙烯和聚氯乙烯,可在田间残留几十年不降解,常年使用还会造成土壤板结、通透性变差、根系生长受阻等诸多问题。因此,针对可降解地膜的开发已成为当前的研究热点。
目前,可降解地膜的原料常选用淀粉、蛋白质、纤维素等天然物质,除了成本高外,还会对民生产生不利影响,推广过程极为困难;同时,现有的可降解地膜和包装膜韧性也较差,无法更好的应用于农业地膜领域。另外,除了地膜外,包装膜领域也急需可降解的膜材料,才能更大程度的保护环境,对生态环境带来良好的影响。
发明内容
本发明的目的在于提供一种生物可降解膜材料,能够有效发生降解,且生物分解率高、韧性好、无毒、无味、成本低。
本发明解决上述技术问题的技术方案如下。
一种生物可降解膜材料,包括如下质量份数的原料:
PBAT 60~90份、PLA/PBS 5~15份、改性淀粉3~8份、改性生物钙粉10~30份、EAA2~10份、分散剂0.1~1份、扩链剂0.1~1份、芥酸酰胺0.1~1份、表面活性剂0.1~1份、甘油/硅油1~5份;其中,表面活性剂为脂肪醇类表面活性剂,扩链剂为DMPA或环氧硅油扩链剂。
进一步地,该生物可降解膜材料,还包括其它助剂,其它助剂包括柔顺剂0.01~0.05份、光稳定剂0.1~0.8份、抗氧剂0.1~0.6份。
进一步地,该生物可降解膜材料,改性淀粉包括如下质量份数的原料:淀粉80~120份、甘油10~20份、硬脂酸0.1~1份、芥酸酰胺0.1~1份。
进一步地,该生物可降解膜材料,改性淀粉通过下述方法获得:称取淀粉并投入至高速混料机内,在搅拌状态下加入甘油,再提高转速并升温,待温度升至102℃时,降低转速并降温,待温度降至65℃时加入硬脂酸和芥酸酰胺,再提高转速并升温,待温度升至100℃时,保持8~12min,再冷却至70℃时取出,获得改性淀粉。
进一步地,该生物可降解膜材料,改性生物钙粉包括如下质量份数的原料:生物钙粉80~120份、水1~4份、硬脂酸锌0.1~1份、聚乙烯蜡0.1~1份、甘油3~8份。
进一步地,该生物可降解膜材料,改性生物钙粉通过下述方法获得:称取生物钙粉并投入高速混料机内,再搅拌状态下加入水,再提高转速并加入甘油,待温度升至80℃时,加入硬脂酸锌和聚乙烯蜡,待温度升至90℃时,保持8~12min,再降低转速、降温,待冷却至70℃时取出,获得改性生物钙粉。
本发明生物可降解膜材料的有益效果为,以PBAT为主要原料,保证膜材料的基本性能;结合偶联剂EAA和扩链剂,有效增加膜材料的分子量、增强膜材料的韧性和强度,同时,由于淀粉和生物钙分子链都比较短,扩链剂起到延长分子链的作用,进而增强和PLA、PBAT等材料的融合性,加快降解时间,并提高材料制品的使用寿命;结合改性生物钙粉,使各个原料之间的分散性更佳,利于膜材料的加工;结合芥酸酰胺、表面活性剂以及硅油或甘油,使膜材料的表面更加光滑;该膜材料,绿色环保可降解,减少对环境的污染,生物分解率高,强度高,成本低。
具体实施方式
实施例1
一种生物可降解膜材料,包括PBAT 72份、PLA 10份、改性淀粉15份、改性生物钙粉20份、偶联剂EAA 5份、分散剂0.3份、扩链剂DMPA0.5份、芥酸酰胺0.3份、脂肪醇类表面活性剂(1618)0.3份、甘油2份。
实施例2
一种生物可降解膜材料,包括PBAT 60份、PLA 10份、改性淀粉5份、改性生物钙粉15份、偶联剂EAA 5份、分散剂1份、扩链剂DMPA0.5份、芥酸酰胺0.5份、脂肪醇类表面活性剂(1618)0.3份、甘油2份。
实施例3
一种生物可降解膜材料,包括PBAT 72份、PLA 5份、改性淀粉20份、改性生物钙粉20份、偶联剂EAA 5份、分散剂0.5份、环氧硅油扩链剂(IOTA 105-1000)0.5份、芥酸酰胺0.3份、脂肪醇类表面活性剂(1618)0.3份、硅油2份、柔顺剂0.04份、光稳定剂(UV531)0.5份、抗氧剂(B900)0.5份。
实施例4
实施例1至实施例3的生物可降解膜材料,其改性淀粉的制作过程为:称取淀粉100kg并投入至高速混料机内,在300r/min的搅拌状态下加入甘油15kg,再提高转速至700r/min并升温,待温度升至102℃时,降低转速至400r/min并降温,待温度降至65℃时加入硬脂酸0.5kg、芥酸酰胺0.5kg,再提高转速700r/min并升温,待温度升至100℃时,保持8~12min,再冷却至70℃时取出,获得改性淀粉。
实施例5
实施例1至实施例3的生物可降解膜材料,其改性生物钙粉的制作过程为:称取生物钙粉100kg并投入高速混料机内,再400r/min搅拌状态下加入纯净水2kg,再提高转速至600r/min并加入甘油5kg,待温度升至80℃时,加入硬脂酸锌0.5kg和聚乙烯蜡0.5kg,待温度升至90℃时,保持8~12min,再降低转速、降温,待冷却至70℃时取出,获得改性生物钙粉。
实施例6
实施例1至实施例3的生物可降解膜材料,其制备方法为,称取所有原料并在搅拌机内混合均匀,再投入双螺杆造粒机内,在温度为150℃、挤出压力为0.3MPa的条件下,挤出切粒。
实施例7
将实施例2的配方所制备的生物可降解膜材料经过吹膜机吹膜成0.01mm的地膜并进行相关测试。
(1)基本性能测试:
由上表可看出,该膜材料的基本性能符合相关标准。
(2)拉伸强度
按照GB/T 1040.1-2018&GB/T 1040.3-2006进行测试。
(3)生物分解率
检测项目 | 技术指标 | 检测结果 | 单项结论 |
最终生物分解率(180d),% | ≥60 | 79.0 | 合格 |
由上表可看出,该膜材料的生物分解率高于技术要求,可降解性优异,绿色环保。
(4)环境降解前后的GPC数据
由上表可看出,该膜材料在降解后,其分子量急剧减小,且降解的较为充分。
Claims (8)
1.一种生物可降解膜材料,其特征在于,包括如下质量份数的原料:
PBAT 60~90份、PLA/PBS 5~15份、改性淀粉3~8份、改性生物钙粉10~30份、EAA 2~10份、分散剂0.1~1份、扩链剂0.1~1份、芥酸酰胺0.1~1份、表面活性剂0.1~1份、甘油/硅油1~5份。
2.如权利要求1所述的生物可降解膜材料,其特征在于,还包括其它助剂:所述其它助剂包括柔顺剂0.01~0.05份、光稳定剂0.1~0.8份、抗氧剂0.1~0.6份。
3.如权利要求1所述的生物可降解膜材料,其特征在于,所述改性淀粉包括如下质量份数的原料:淀粉80~120份、甘油10~20份、硬脂酸0.1~1份、芥酸酰胺0.1~1份。
4.如权利要求3所述的生物可降解膜材料,其特征在于,所述改性淀粉通过下述方法获得:称取淀粉并投入至高速混料机内,在搅拌状态下加入甘油,再提高转速并升温,待温度升至102℃时,降低转速并降温,待温度降至65℃时加入硬脂酸、芥酸酰胺,再提高转速并升温,待温度升至100℃时,保持8~12min,再冷却至70℃时取出,获得改性淀粉。
5.如权利要求1所述的生物可降解膜材料,其特征在于,所述改性生物钙粉包括如下质量份数的原料:生物钙粉80~120份、水1~4份、硬脂酸锌0.1~1份、聚乙烯蜡0.1~1份、甘油3~8份。
6.如权利要求5所述的生物可降解膜材料,其特征在于,所述改性生物钙粉通过下述方法获得:称取生物钙粉并投入高速混料机内,再搅拌状态下加入水,再提高转速并加入甘油,待温度升至80℃时,加入硬脂酸锌和聚乙烯蜡,待温度升至90℃时,保持8~12min,再降低转速、降温,待冷却至70℃时取出,获得改性生物钙粉。
7.如权利要求1所述的生物可降解膜材料,其特征在于,所述表面活性剂为脂肪醇类表面活性剂。
8.如权利要求1所述的生物可降解膜材料,其特征在于,所述扩链剂为DMPA或环氧硅油扩链剂。
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CN112759901A (zh) * | 2020-12-29 | 2021-05-07 | 四川坤源杰环保科技有限公司 | 微晶化增韧改性pbs或pbat生物可降解复合材料 |
CN113172975A (zh) * | 2021-04-06 | 2021-07-27 | 温州银润包装有限公司 | 一种多层复合共挤膜及其制作工艺 |
CN114891331A (zh) * | 2022-05-27 | 2022-08-12 | 江苏道奇新材料有限公司 | 一种增韧聚乳酸/淀粉共混材料及其制备方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101649072A (zh) * | 2009-09-22 | 2010-02-17 | 任伟 | 一种全降解生物材料及其薄膜制品 |
US20180142073A1 (en) * | 2016-11-24 | 2018-05-24 | Chiao Fu Material Technology Co., Ltd. | Biodecomposable film material and method for making the same |
CN110654095A (zh) * | 2019-09-27 | 2020-01-07 | 深圳万达杰环保新材料股份有限公司 | 生物降解膜及其制造方法 |
-
2020
- 2020-07-23 CN CN202010719217.3A patent/CN111793332B/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101649072A (zh) * | 2009-09-22 | 2010-02-17 | 任伟 | 一种全降解生物材料及其薄膜制品 |
US20180142073A1 (en) * | 2016-11-24 | 2018-05-24 | Chiao Fu Material Technology Co., Ltd. | Biodecomposable film material and method for making the same |
CN110654095A (zh) * | 2019-09-27 | 2020-01-07 | 深圳万达杰环保新材料股份有限公司 | 生物降解膜及其制造方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112409769A (zh) * | 2020-12-23 | 2021-02-26 | 苏州润佳工程塑料股份有限公司 | 一种pla-pbat共混改性可降解材料 |
CN112759901A (zh) * | 2020-12-29 | 2021-05-07 | 四川坤源杰环保科技有限公司 | 微晶化增韧改性pbs或pbat生物可降解复合材料 |
CN113172975A (zh) * | 2021-04-06 | 2021-07-27 | 温州银润包装有限公司 | 一种多层复合共挤膜及其制作工艺 |
CN114891331A (zh) * | 2022-05-27 | 2022-08-12 | 江苏道奇新材料有限公司 | 一种增韧聚乳酸/淀粉共混材料及其制备方法 |
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