会变形的水凝胶

doi:10.3866/PKU.DXHX201911050

Abstract

Abstract:

This work is an innovative comprehensive experiment on the preparation of deformable hydrogels and the design as well as the adjustment of their complex shape deformations. A type of poly(N-vinylpyrrolidone)-polyacrylamide (PVP-PAAm) hydrogels with excellent mechanical properties are firstly prepared through free radical polymerization and cross-linking. Poly(sodium acrylate) (PNaAAc) contained in the hydrogels can complex with metal ions like Fe³⁺, leading to the increase of the cross-linking density of the hydrogels and hence the decrease of their swelling degrees. Through ion-transfer-printing (ITP) and newly developed ion-ink-printing (IIP) techniques, Fe³⁺ ions are introduced at different positions on one or both sides of hydrogels, changing the local cross-linking density and swelling degree of the surface of hydrogels. Upon swelling or deswelling, the hydrogels can undergo controllable and complex transformations from 1D to 2D, 2D to 3D and 3D to more complicated 3D shapes.

Key words: Deformable hydrogels, Stimuli-response, Ion-transfer-printing, Ion-ink-printing

MSC2000:

Shi Yunqi, Liang Min, Geng Tianyi, Chen Yuanyuan, Wang Huiliang. Deformable Hydrogels[J].University Chemistry, 2020, 35(4): 10-18.

Figures/Tables 13

References 21

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试剂及材料名称	纯度及规格	制造商
聚乙烯基吡咯烷酮(PVP)	分析纯，M_w = 58000	阿拉丁生化科技股份有限公司，中国
丙烯酸(AAc)	分析纯	阿拉丁生化科技股份有限公司，中国
丙烯酰胺(AAm)	分析纯	阿拉丁生化科技股份有限公司，中国
过硫酸钾(KPS)	分析纯	西陇化工股份有限公司，中国
N, N’-亚甲基双丙烯酰胺(BIS)	分析纯	北京伊诺凯科技有限公司，中国
无水氯化铁(FeCl₃)	分析纯	西陇化工股份有限公司，中国
氢氧化钠(NaOH)	分析纯	国药集团化学试剂有限公司，中国
罗丹明B	分析纯	阿法埃莎化学有限公司，中国
无水乙醇(Ethanol)	分析纯	北京市通广精细化工公司，中国

仪器名称	型号	制造商
分析天平	0.0001 g	梅特勒公司，瑞士
写字机器人	idraw	深圳市熊仔科技有限公司，中国
万能材料试验机	Instron 3366	Instron公司，美国
玻璃板	20 cm × 20 cm	睿展科技有限公司，中国

实验次数	实验内容	学时
第一次	课堂讲解实验、准备实验仪器	4
第二次	单体的提纯	4
第三次	水凝胶的制备	4
第四次	水凝胶机械性能的测试	4
第五次	可变形凝胶变形程度的测试	4
第六次	可变形凝胶变形的设计和调控	4
第七次	水凝胶的溶胀率/解溶胀率的测试	4
第八次	总结汇报	4

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