CN103041789B - 一种聚乳酸/坡缕石/聚乙二醇吸附薄膜 - Google Patents
一种聚乳酸/坡缕石/聚乙二醇吸附薄膜 Download PDFInfo
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Abstract
本发明公开了一种聚乳酸/坡缕石/聚乙二醇吸附薄膜，采用聚乳酸、酸活化坡缕石和聚乙二醇三种物质共混，得到分散均匀的铸膜液，充分发挥组分材料各自优异性能的协调效应，且利用高分子间的相容性改善和控制膜性能，得到了性能优良，价格低廉，具有应用前景的新型膜材料。
Description
技术领域
本发明涉及吸附薄膜领域，具体涉及一种聚乳酸/坡缕石/聚乙二醇吸附薄膜。
背景技术
坡缕石化学式为 (Mg，Al)5(H2O)4((Si，Al)4O10)(OH)2·4H2O，晶体属单斜或斜方(正交)晶系的层链状硅酸盐矿物。具有很大的比表面积和吸附能力，很好的流变性和催化性能，同时，具有理想的胶体性能和耐热性能，在化工、农药、国防、医药、建材、轻纺等行业广泛应用，近年来在环保、汽车、绝缘、陶瓷工业的应用，也有突出进展。
坡缕石的晶体形态和结构特点决定了它具有良好的分子筛效应，可以吸附水和气体组分，对有机物也具有很高的吸附力，尤其是对乙烷、苯、甲醇等有机物有更强的吸附性。还可用于石油、动物油、植物没、粮食、脂肪、醋、酱油、酒类、维生素和水的脱色、净化和过滤。其在环境保护方面也有重要应用，可以用来净化生活污水、工业污水、固体废物及有毒气体，具有永久性处理、减少再次污染。
发明内容
本发明的目的在于提供一种聚乳酸/坡缕石/聚乙二醇吸附薄膜。
一种聚乳酸/坡缕石/聚乙二醇吸附薄膜制备过程为：
(1) 坡缕石活化：
a.乙酸活化
将坡缕石加入到浓度为0.8mol/L的乙酸溶液中，搅拌0.5~2h，抽滤，再使用去离子水洗涤至pH值中性，然后于真空干燥箱中在70℃干燥12~24h，研磨，过300~500目筛待用。
b.盐酸活化
将a中坡缕石加入到质量分数为5%的盐酸溶液，搅拌0.5~2h，抽滤，再使用去离子水洗涤至pH值中性，然后于真空干燥箱中在70℃干燥12~24h。
(2) 聚乳酸/坡缕石/聚乙二醇薄膜的制备
将聚乳酸溶于二氯甲烷溶液中，配成质量分数为1~3%的聚乳酸溶液；聚乙二醇溶于蒸馏水中，配成质量分数为2~5%的聚乙二醇溶液。将上述聚乳酸溶液与聚乙二醇溶液等体积混合，加入活化坡缕石和六亚甲基二异氰酸酯，室温下搅拌3h。所得溶液倒入铸膜盘中，室温干燥成膜。使用1mol/L的NaOH溶液浸泡1h，水洗至中性，然后将膜置于玻璃板上，室温干燥。
进一步的，在薄膜制备过程中，加入的活化坡缕石占总质量的1~2%，六亚甲基二异氰酸酯占总质量的0.3~0.5%。
本发明的积极效果在于：采用聚乳酸、酸活化坡缕石和聚乙二醇三种物质共混，得到分散均匀的铸膜液，充分发挥组分材料各自优异性能的协调效应，且利用高分子间的相容性改善和控制膜性能，得到了性能优良，价格低廉，具有应用前景的新型膜材料。
具体实施方式
下面结合实施例详细说明本发明的技术方案，但保护范围并不受此限制。
实施例1 一种聚乳酸/坡缕石/聚乙二醇薄膜
将2.5g聚乳酸溶于50mL二氯甲烷中，配成聚乳酸溶液；2.5g聚乙二醇溶于100mL蒸馏水中，配成聚乙二醇溶液。将上述聚乳酸溶液与聚乙二醇溶液等体积混合，加入0.25g活化坡缕石和10mL六亚甲基二异氰酸酯，室温下搅拌3h。所得溶液倒入铸膜盘中，室温干燥成膜。使用1mol/L的NaOH溶液浸泡1h，水洗至中性，然后将膜置于玻璃板上，室温干燥。
实施例2 一种聚乳酸/坡缕石/聚乙二醇薄膜
将2g聚乳酸溶于50mL二氯甲烷中，配成聚乳酸溶液；2g聚乙二醇溶于100mL蒸馏水中，配成聚乙二醇溶液。将上述聚乳酸溶液与聚乙二醇溶液等体积混合，加入0.5g活化坡缕石和8mL六亚甲基二异氰酸酯，室温下搅拌3h。所得溶液倒入铸膜盘中，室温干燥成膜。使用1mol/L的NaOH溶液浸泡1h，水洗至中性，然后将膜置于玻璃板上，室温干燥。
实施例3一种聚乳酸/坡缕石/聚乙二醇薄膜
将3g聚乳酸溶于50mL二氯甲烷中，配成聚乳酸溶液；2g聚乙二醇溶于100mL蒸馏水中，配成聚乙二醇溶液。将上述聚乳酸溶液与聚乙二醇溶液等体积混合，加入0.5g活化坡缕石和8mL六亚甲基二异氰酸酯，室温下搅拌3h。所得溶液倒入铸膜盘中，室温干燥成膜。使用1mol/L的NaOH溶液浸泡1h，水洗至中性，然后将膜置于玻璃板上，室温干燥。
Claims (2)
1.一种聚乳酸/坡缕石/聚乙二醇吸附薄膜，其特征在于：所述薄膜制备过程为：
（1）坡缕石活化：
a. 乙酸活化
将坡缕石加入到浓度为0.8~1.5mol/L的乙酸溶液中，搅拌0.5~2h，抽滤，再使用去离子水洗涤至pH值中性，然后于真空干燥箱中在70℃干燥12~24h，研磨，过300~500目筛待用；
b. 盐酸活化
将a中乙酸活化的坡缕石加入到浓度为0.8~1.5mol/L的盐酸溶液中，搅拌0.5~2h，抽滤，再使用去离子水洗涤至pH值中性，然后于真空干燥箱中在70℃干燥12~24h；
（2）将聚乳酸溶于二氯甲烷溶液中，配成质量分数为1~3%的聚乳酸溶液；聚乙二醇溶于蒸馏水中，配成质量分数为2~5%的聚乙二醇溶液，将上述聚乳酸溶液与聚乙二醇溶液等体积混合，加入活化坡缕石和六亚甲基二异氰酸酯，室温下搅拌3h，所得溶液倒入铸膜盘中，室温干燥成膜，使用1mol/L的NaOH溶液浸泡1h，水洗至中性，然后将膜置于玻璃板上，室温干燥。
2. 根据权利要求1所述的一种聚乳酸/坡缕石/聚乙二醇吸附薄膜，其特征在于：薄膜制备过程中，加入的活化坡缕石占总质量的1~2%，六亚甲基二异氰酸酯占总质量的0.3~0.5%。
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| CN1023019C (zh) * | 1989-04-11 | 1993-12-08 | 四川建筑材料工业学院 | 凹凸棒粘土的半干法酸热活化方法 |
| CN100415829C (zh) * | 2007-05-18 | 2008-09-03 | 哈尔滨工业大学 | 一种增塑聚乳酸/氧化镧改性蒙脱土纳米复合材料的制备方法 |
| CN101195694B (zh) * | 2007-12-22 | 2011-01-19 | 西北师范大学 | 可降解复合塑料及其制备方法 |
| CN101875765A (zh) * | 2010-07-14 | 2010-11-03 | 华东理工大学 | 一种增塑聚乳酸/无机纳米复合材料及其制备方法 |
| JP2012020229A (ja) * | 2010-07-14 | 2012-02-02 | Kao Corp | 活性炭粒子の製造方法 |
| CN101914223B (zh) * | 2010-08-06 | 2012-01-25 | 西北师范大学 | 改性淀粉-聚乙烯醇基复合塑料薄膜的制备方法 |
| CN102391627B (zh) * | 2011-08-24 | 2013-03-27 | 淮阴工学院 | 聚乳酸/聚丁二酸丁二醇酯/凹凸棒石粘土复合材料的制备方法 |
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