近红外光刺激响应的膜作为牺牲层制备自支持膜
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- 英文论文题名：Near Infrared Light Stimulus-Responsive Film as A Sacrificial Layer for the Preparation of Free-Standing Films
- 论文作者：包春阳 ; 姜毅君 ; 孙俊奇
- 英文论文作者：Chunyang Bao ; Yi-Jun Jiang ; 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：自支持膜 ; 可降解 ; 牺牲层 ; 近红外光 ; 上转换纳米粒子
- 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：184k
- 原文格式：D
- 会议级别：全国
摘要
牺牲层法是制备自支持膜的一种常用方法,但是能在近红外光下降解的牺牲层尚未见报道。我们制备了一种能在980 nm近红外光下降解的层层组装膜,这种膜由含有带正电的邻硝基苄脂基团的季铵盐聚合物(PNBA-TEA),聚苯乙烯磺酸钠(PSS)、支化聚乙烯基亚胺(bP EI)和带负电的稀土上转换纳米粒子(UCNPs),构成结构为[(PNBA-TEA/PSS)*2/(b PEI/UCNPs)*3]*2的聚电解质复合物膜。该膜中的UCNPs可以将近红外光原位转化成紫外光,而PNBA-TEA又可在上述紫外光下降解并生成带负电的光解产物,该光解产物与PSS之间的静电排斥力能导致[(PNBA-TEA/PSS)*2/(b PEI/UCNPs)*3]*2复合膜的完全解离。当把[(PNBA-TEA/PSS)*2/(b PEI/UCNPs)*3]*2复合膜作为牺牲层,并在其上通过层层组装的方法继续生长50个周期的聚烯丙基胺盐酸盐(PAH)/聚丙烯酸(PAA)薄膜,可在近红外光照射后得到大面积且无缺陷的(PAH\PAA)*50自支持膜。近红外光可降解的牺牲层降解条件温和,并且可以非接触式作用,避免了在溶液中浸泡以实现降解的方法对上层膜结构可能造成的损伤,可以在未来运用于制备多种自支持膜。
It remains a challenge to fabricate sacrificial films that are stable in most of solvents and can be readily decomposed on demand. Here we fabricated a near-infrared(NIR) light decomposable sacrificial film by layer-by-layer(LbL) assembly of UV-light-decomposable poly((4-(2-bromoethoxy)-5-methoxy-2-nitrobenzyl acrylate) triethylammonium bromide)(PNBA-TEA), poly(sodium 4-styrene-sulfonate)(PSS), branched polyethyleimine(bPEI) and lanthanide-doped upconversion nanoparticles(UCNPs). In the [(PNBA-TEA/PSS)*2/(bPEI/UCNPs)*3]*2 films, UCNPs can convert NIR light into UV light, which can decompose PNBA-TEA. After immersing the NIR light-irradiated [(PNBA-TEA/PSS)*2/(bPEI/UCNPs)*3]*2 films in 0.1 M aqueous NaHCO_3 solution, the entire films will disintegrating because of the repulsive force between the negatively charged photoproduct of PNBA-TEA and PSS. Lb L-assembled(PAH/PAA)*50 films deposited on top of the NIR-light-decomposable [(PNBA-TEA/PSS)*2/(bPEI/UCNPs)*3]*2 films can be conveniently released to produce large-area and defect-free(PAH/PAA)*50 free-standing films. Because of the satisfactory stability and on-demand decomposable property, the [(PNBA-TEA/PSS)*2/(bPEI/UCNPs)*3]*2 films are promising as sacrificial layers for the fabrication of various free-standing films.
It remains a challenge to fabricate sacrificial films that are stable in most of solvents and can be readily decomposed on demand. Here we fabricated a near-infrared(NIR) light decomposable sacrificial film by layer-by-layer(LbL) assembly of UV-light-decomposable poly((4-(2-bromoethoxy)-5-methoxy-2-nitrobenzyl acrylate) triethylammonium bromide)(PNBA-TEA), poly(sodium 4-styrene-sulfonate)(PSS), branched polyethyleimine(bPEI) and lanthanide-doped upconversion nanoparticles(UCNPs). In the [(PNBA-TEA/PSS)*2/(bPEI/UCNPs)*3]*2 films, UCNPs can convert NIR light into UV light, which can decompose PNBA-TEA. After immersing the NIR light-irradiated [(PNBA-TEA/PSS)*2/(bPEI/UCNPs)*3]*2 films in 0.1 M aqueous NaHCO_3 solution, the entire films will disintegrating because of the repulsive force between the negatively charged photoproduct of PNBA-TEA and PSS. Lb L-assembled(PAH/PAA)*50 films deposited on top of the NIR-light-decomposable [(PNBA-TEA/PSS)*2/(bPEI/UCNPs)*3]*2 films can be conveniently released to produce large-area and defect-free(PAH/PAA)*50 free-standing films. Because of the satisfactory stability and on-demand decomposable property, the [(PNBA-TEA/PSS)*2/(bPEI/UCNPs)*3]*2 films are promising as sacrificial layers for the fabrication of various free-standing films.
引文
[1]Bao,C,Y.;Jiang,Y,J.;Sun,J,Q.Langmuir,2016,32,3393