可降解的透明性自修复膜材料
详细信息 查看官网全文
- 英文论文题名：Healable and Optically Transparent Polymeric Films Capable of Being Erased on Demand
- 论文作者：王燕 ; 李天奇 ; 孙俊奇
- 英文论文作者：Yan Wang ; Tianqi Li ; Junqi Sun ; State Key Laboratory of Supramolecular Structure and Materials ; College of Chemistry ; Jilin University
- 年：2016
- 作者机构：超分子结构与材料国家重点实验室化学学院吉林大学;
- 论文关键词：自修复 ; 层层组装 ; 可降解 ; 透明
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十四分会：超分子组装与软物质材料
- 语种：中文
- 分类号：TB383.2
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十四分会 ; 超分子组装与软物质材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：136k
- 原文格式：D
- 会议级别：全国
摘要
自修复材料可以通过材料内部的物质迁移来修复机械损伤,延长材料的使用寿命,并提高材料的稳定性。但由于人造自修复材料无法主动从外界获取物质和能量,因此,人造自修复材料的修复次数有限,且无法修复过大的损伤。在本工作中,我们利用层层组装方法,以氢键作用为成膜驱动力制备了可降解的透明性自修复聚丙烯酸(PAA)/聚环氧乙烷(PEO)膜。当该膜受到小损伤时,在酸性水溶液中浸泡即可修复膜的透明性和受损结构。当该膜受到过大的损伤而无法修复时,只需在水中浸泡就可以实现膜的降解,便于新的透明自修复膜的制备。可降解功能与可修复功能的集成将为设计和制备具有更高可靠性和更长使用寿命的透明膜材料提供全新的途径。
Different from living organisms, artificial materials can only undergo limited number of damage/healing processes and cannot heal severe damage. As an alternative to solve this problem, we report in this study the fabrication of erasable, optically transparent and healable films by exponential layer-by-layer assembly of poly(acrylic acid)(PAA) and poly(ethylene oxide)(PEO). The PAA/PEO films are highly transparent, capable of healing damages and erasing under external stimuli. The PAA/PEO films can heal damages such as scratches and cuts for multiple times in the same location by exposure to pH 2.5 water or humid N_2 flow. When the damage exceeds the capability of the films to repair, the damaged films can be conveniently erased from substrates to facilitate the replacement of the damaged films with new ones. The combination of healability and erasibility provides a new way to the design of transparent films with enhanced reliability and extended service life.
Different from living organisms, artificial materials can only undergo limited number of damage/healing processes and cannot heal severe damage. As an alternative to solve this problem, we report in this study the fabrication of erasable, optically transparent and healable films by exponential layer-by-layer assembly of poly(acrylic acid)(PAA) and poly(ethylene oxide)(PEO). The PAA/PEO films are highly transparent, capable of healing damages and erasing under external stimuli. The PAA/PEO films can heal damages such as scratches and cuts for multiple times in the same location by exposure to pH 2.5 water or humid N_2 flow. When the damage exceeds the capability of the films to repair, the damaged films can be conveniently erased from substrates to facilitate the replacement of the damaged films with new ones. The combination of healability and erasibility provides a new way to the design of transparent films with enhanced reliability and extended service life.
引文
[1]Wang,Y.;Li T.;Li,S.;Guo,R.;Sun,J.ACS Appl.Mater.Interfaces 2015,7:13597.