Regulating the self-assembly of PS-b-PNIPAm block copolymers enables dual-responsive shape memory hydrogel

IF 5.8 2区化学 Q1 POLYMER SCIENCE

European Polymer Journal Pub Date : 2025-04-08 DOI:10.1016/j.eurpolymj.2025.113933

Yan Wang , Jie Zhang , Jianlei Lu , Nan Hai , Jiawei Zhang

{"title":"Regulating the self-assembly of PS-b-PNIPAm block copolymers enables dual-responsive shape memory hydrogel","authors":"Yan Wang , Jie Zhang , Jianlei Lu , Nan Hai , Jiawei Zhang","doi":"10.1016/j.eurpolymj.2025.113933","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, we developed a poly(styrene-<em>b</em>-<em>N</em>-isopropyl acrylamide) (PS-<em>b</em>-PNIPAm) block copolymer-incorporated hydrogel with cooling/water dual-responsive shape recovery performance. Three kinds of PS-<em>b</em>-PNIPAm block copolymers with different chain lengths of PNIPAm were prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization, and the block copolymers could self-assemble into micelles with PNIPAm as the outer layer in water. Hydrogels were then prepared by introducing the micelles formed by the block copolymers into the polyacrylamide (PAM) network. The collapse of PNIPAm chains could be promoted by both temperature and salt, which acted as temporary crosslinks to stabilize temporary shapes, enabling cooling- and water-stimulated shape recovery. Moreover, fluorescent information could be encoded on the surface of the hydrogel and encrypted by the shape changes of the hydrogel during the shape fixing process, with the information revealed under UV irradiation after the shape recovery process, achieving information security. This approach could accelerate the evolution of shape memory hydrogels and broaden their applications across diverse fields.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":"232 ","pages":"Article 113933"},"PeriodicalIF":5.8000,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Polymer Journal","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0014305725002216","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, we developed a poly(styrene-b-N-isopropyl acrylamide) (PS-b-PNIPAm) block copolymer-incorporated hydrogel with cooling/water dual-responsive shape recovery performance. Three kinds of PS-b-PNIPAm block copolymers with different chain lengths of PNIPAm were prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization, and the block copolymers could self-assemble into micelles with PNIPAm as the outer layer in water. Hydrogels were then prepared by introducing the micelles formed by the block copolymers into the polyacrylamide (PAM) network. The collapse of PNIPAm chains could be promoted by both temperature and salt, which acted as temporary crosslinks to stabilize temporary shapes, enabling cooling- and water-stimulated shape recovery. Moreover, fluorescent information could be encoded on the surface of the hydrogel and encrypted by the shape changes of the hydrogel during the shape fixing process, with the information revealed under UV irradiation after the shape recovery process, achieving information security. This approach could accelerate the evolution of shape memory hydrogels and broaden their applications across diverse fields.

Abstract Image

查看原文本刊更多论文

调节PS-b-PNIPAm嵌段共聚物的自组装使双响应形状记忆水凝胶成为可能

在这项研究中，我们开发了一种具有冷却/水双响应形状恢复性能的聚（苯乙烯-b- n -异丙基丙烯酰胺）（PS-b-PNIPAm）嵌段共聚物水凝胶。采用可逆加成-破碎链转移（RAFT）聚合法制备了3种不同PNIPAm链长的PS-b-PNIPAm嵌段共聚物，该嵌段共聚物在水中以PNIPAm为外层可自组装成胶束。然后将嵌段共聚物形成的胶束引入聚丙烯酰胺（PAM）网络中制备水凝胶。温度和盐都可以促进PNIPAm链的崩溃，它们作为临时交联来稳定临时形状，从而实现冷却和水刺激下的形状恢复。此外，荧光信息可以在水凝胶表面进行编码，并在形状固定过程中利用水凝胶的形状变化进行加密，在形状恢复过程后在紫外线照射下暴露，实现信息安全。这种方法可以加速形状记忆水凝胶的发展，拓宽其在不同领域的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

European Polymer Journal 化学-高分子科学

CiteScore

9.90

自引率

10.00%

发文量

691

审稿时长

23 days

期刊介绍： European Polymer Journal is dedicated to publishing work on fundamental and applied polymer chemistry and macromolecular materials. The journal covers all aspects of polymer synthesis, including polymerization mechanisms and chemical functional transformations, with a focus on novel polymers and the relationships between molecular structure and polymer properties. In addition, we welcome submissions on bio-based or renewable polymers, stimuli-responsive systems and polymer bio-hybrids. European Polymer Journal also publishes research on the biomedical application of polymers, including drug delivery and regenerative medicine. The main scope is covered but not limited to the following core research areas: Polymer synthesis and functionalization • Novel synthetic routes for polymerization, functional modification, controlled/living polymerization and precision polymers. Stimuli-responsive polymers • Including shape memory and self-healing polymers. Supramolecular polymers and self-assembly • Molecular recognition and higher order polymer structures. Renewable and sustainable polymers • Bio-based, biodegradable and anti-microbial polymers and polymeric bio-nanocomposites. Polymers at interfaces and surfaces • Chemistry and engineering of surfaces with biological relevance, including patterning, antifouling polymers and polymers for membrane applications. Biomedical applications and nanomedicine • Polymers for regenerative medicine, drug delivery molecular release and gene therapy The scope of European Polymer Journal no longer includes Polymer Physics.