3D打印聚乳酸膜及其油-水分离性能
3D Printing of Polylactic Acid Membranes for Oil-Water Separation and Its Performance
郜阳 1张桐赫 1高腾飞 1周有慧 1唐文龙 1王政2
作者信息
- 1. 宁夏大学化学化工学院省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏银川 750021
- 2. 宁夏大学化学化工学院省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏银川 750021;宁夏大学测试分析中心,宁夏银川 750021
- 折叠
摘要
采用3D(3-Dimension)打印技术制备了具有规则孔道结构且孔径可控的多孔聚乳酸(PLA)膜,然后以聚乙烯醇(PVA)为表面改性剂,利用氢键交联作用制备了 PVA/PLA复合膜.当PLA膜基底填充率为70％时制备的PVA/PLA-70％复合膜的水下油接触角为165.9°,具有超疏油特性.在使用微量水润湿油-水分离膜条件下,PVA/PLA-70％复合膜的油-水分离实验结果表明:PVA/PLA-70％复合膜的油-水分离效率大于99％、水通量高达73.12 L/(m2·s);油-水分离循环使用80次后,分离效率仍大于97％,且水通量稳定在56.10 L/(m2·s),PVA改性PLA膜具有良好的循环稳定性.利用3D打印技术为制备可生物降解的油-水分离膜提供了新的研究方法.
Abstract
Three-dimensional(3D)printing technique was used to fabricate porous polylactic acid(PLA)membranes with a controllable pore size and regular pore structure.Then PVA/PLA composite membrane was prepared using polyvinyl alcohol(PVA)as the surface modifier through hydrogen bonds cross-linking.When the filling rate of PLA membrane reaches 70％,the underwater oil contact angle of the PVA/PLA-70％composite membrane is 165.9°,showing superoleophobic properties.In case of applying a tiny amount of water to moisten the oil-water separation membrane,the PVA/PLA-70％composite membrane oil-water separation experiment demonstrates that:(1)The separation efficiency of PVA/PLA-70％is greater than 99％and the water flux is 73.12 L/(m2·s);(2)After 80 oil-water separation cycles,the separation efficiency is still greater than 97％,and the water flux keeps constant at 56.10 L/(m2·s),confirming that PVA modified PLA membrane has a reliable cycle stability.In conclusion,the 3D printing technique provides a novel research methodology for preparing biodegradable oil-water separation membrane.
关键词
3D打印/油-水分离/聚乙烯醇/聚乳酸膜/疏油特性/分离效率/生物降解Key words
3D printing/oil-water separation/polyvinyl alcohol/polylactic acid membrane/oleophobic property/separation efficiency/biodegradation引用本文复制引用
基金项目
国家自然科学基金项目(22169015)
宁夏自然科学基金项目(2021AAC02003)
宁夏回族自治区国内一流学科建设项目(NXYLXK2017A04)
出版年
2024
NETL
NSTL
万方数据