Fabrication of Covalently Linked PAH/PVS Layer-by-layer Assembled Multilayers via a Post-photochemical Cross-linking Strategy

被引:4
作者
Ji Fanqin [1 ,2 ,3 ]
Zhang Yingwei [2 ,3 ]
Geng Yanling [1 ]
Zong Yingxia [1 ]
Wang Lei [1 ]
机构
[1] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, State Key Lab Inorgan Synth & Appl Chem, Qingdao 266042, Peoples R China
[2] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Beijing Engn Res Ctr Synth & Applicat Waterborne, Beijing 100029, Peoples R China
[3] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Beijing Lab Biomed Mat, Beijing 100029, Peoples R China
基金
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词
Post-infiltration; Photochemical cross-linking; Poly(allylamine hydrochloride)/poly(vinylsulfonic acid sodium salt); Multilayer; Layer-by-layer(LbL) assembly; POLYELECTROLYTE MULTILAYERS; ULTRATHIN FILMS; FACILE METHOD; AZIDO GROUPS; THIN-FILMS; POLYMER; ENCAPSULATION; DEPOSITION; TEMPLATES; RELEASE;
D O I
10.1007/s40242-016-5458-2
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A post-photochemical cross-linking strategy was successfully demonstrated to enhance the stability of polyelectrolyte poly(allylamine hydrochloride)(PAH)/poly(vinylsulfonic acid sodium salt)(PVS) multilayers. Conventional polyelectrolyte multilayers of PAH/PVS are usually fabricated through electrostatic layer-by-layer(LbL) assembly, resulting in poor stability, especially in basic solutions, which leads to the urgent demand for converting weak electrostatic interactions into covalent bonds to enhance the stability of the multilayers. This stability problem has been ultimately addressed by post-infiltrating a photosensitive cross-linking agent, 4,4'-diazostilbene-2,2'-disulfonic acid disodium salt(DAS), into the LbL assembled films to initiate the photochemical reaction to cross-link the multilayers. The obviously improved stability of the photo-cross-linked multilayers was demonstrated through experiments with basic solution treatments. Compared to the complete decomposition of uncross-linked multilayers in basic solution, over 74.4% of the covalently cross-linked multilayers were retained under the same conditions, even after a longer duration of basic solution treatment.
引用
收藏
页码:493 / 498
页数:6
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