Enhanced water-induced shape memory and swelling characteristics of graphene oxide-cellulose nanofiber reinforced polyvinyl alcohol nanocomposites

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED

Journal of Vinyl & Additive Technology Pub Date : 2025-01-29 DOI:10.1002/vnl.22203

Lince Mathew Thomas, M. S Sreekanth

{"title":"Enhanced water-induced shape memory and swelling characteristics of graphene oxide-cellulose nanofiber reinforced polyvinyl alcohol nanocomposites","authors":"Lince Mathew Thomas, M. S Sreekanth","doi":"10.1002/vnl.22203","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <p>An efficient water-induced shape memory polymer (SMP) has been developed by incorporating graphene oxide (GO) and cellulose nanofibers (CNF) into polyvinyl alcohol (PVA) matrix. The resulting PVA/GO-CNF hybrid nanocomposite films at 1 wt% exhibit synergistic effect with superior water-induced shape memory performance, with 100% shape recovery within 37 sec. Moreover, these hybrid nanocomposite films at 1 wt% demonstrate superior mechanical strength of 77.9 MPa and an improved glass transition temperature (<i>T</i><sub>g</sub>) of 61.4°C in dry conditions. The synergetic effect of GO and CNF in PVA overcomes the limitations of other PVA-based SMPs in terms of mechanical properties, dimensional stability, and resistance to excessive swelling. Exposure to water significantly reduces <i>T</i><sub>g</sub> to 24.2°C, as confirmed by DSC analysis, which is attributed to the decrease in hydrogen bonding between PVA and 1 wt% GO-CNF caused by the swelling and plasticizing effect of water. Consequently, the shape recovery of the PVA/1 wt% GO-CNF occurs with a switching temperature activation due to the polymer chains' released strain energy. These findings suggest that these hybrid films hold the potential for expanding the applications of SMPs in biomedical and moisture-responsive application such as soft robotics and smart textiles, where water serves as the primary stimulus.</p>\n </section>\n \n <section>\n \n <h3> Highlights</h3>\n \n <div>\n <ul>\n \n <li>PVA/1 wt% GO-CNF hybrid film demonstrates 100% shape recovery in 37 sec.</li>\n \n <li>Water immersed PVA/1 wt% GO-CNF nanocomposites show a reduction in <i>T</i><sub>g</sub> to 24.2°C.</li>\n \n <li>PVA/1 wt% GO-CNF nanocomposite shows superior mechanical strength in dry conditions.</li>\n \n <li>Shape memory behavior is due to reduction in hydrogen bonding and plasticizing effect.</li>\n </ul>\n </div>\n </section>\n </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"31 3","pages":"728-755"},"PeriodicalIF":3.8000,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Vinyl & Additive Technology","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/vnl.22203","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}

引用次数: 0

Abstract

An efficient water-induced shape memory polymer (SMP) has been developed by incorporating graphene oxide (GO) and cellulose nanofibers (CNF) into polyvinyl alcohol (PVA) matrix. The resulting PVA/GO-CNF hybrid nanocomposite films at 1 wt% exhibit synergistic effect with superior water-induced shape memory performance, with 100% shape recovery within 37 sec. Moreover, these hybrid nanocomposite films at 1 wt% demonstrate superior mechanical strength of 77.9 MPa and an improved glass transition temperature (T_g) of 61.4°C in dry conditions. The synergetic effect of GO and CNF in PVA overcomes the limitations of other PVA-based SMPs in terms of mechanical properties, dimensional stability, and resistance to excessive swelling. Exposure to water significantly reduces T_g to 24.2°C, as confirmed by DSC analysis, which is attributed to the decrease in hydrogen bonding between PVA and 1 wt% GO-CNF caused by the swelling and plasticizing effect of water. Consequently, the shape recovery of the PVA/1 wt% GO-CNF occurs with a switching temperature activation due to the polymer chains' released strain energy. These findings suggest that these hybrid films hold the potential for expanding the applications of SMPs in biomedical and moisture-responsive application such as soft robotics and smart textiles, where water serves as the primary stimulus.

Highlights

PVA/1 wt% GO-CNF hybrid film demonstrates 100% shape recovery in 37 sec.
Water immersed PVA/1 wt% GO-CNF nanocomposites show a reduction in T_g to 24.2°C.
PVA/1 wt% GO-CNF nanocomposite shows superior mechanical strength in dry conditions.
Shape memory behavior is due to reduction in hydrogen bonding and plasticizing effect.

查看原文本刊更多论文

氧化石墨烯-纤维素纳米纤维增强聚乙烯醇纳米复合材料的水致形状记忆和膨胀特性

将氧化石墨烯（GO）和纤维素纳米纤维（CNF）掺入聚乙烯醇（PVA）基体中，制备了一种高效的水致形状记忆聚合物（SMP）。所得到的PVA/GO-CNF杂化纳米复合膜在1 wt%时表现出协同效应，具有优异的水致形状记忆性能，在37秒内可实现100%的形状恢复。此外，这些杂化纳米复合膜在1 wt%时表现出77.9 MPa的机械强度和干燥条件下玻璃化转变温度（Tg）的61.4℃。氧化石墨烯和CNF在PVA中的协同作用克服了其他PVA基SMPs在机械性能、尺寸稳定性和抗过度膨胀方面的局限性。DSC分析证实，接触水会显著降低Tg至24.2°C，这是由于水的膨胀和塑化作用导致PVA和1wt % GO-CNF之间的氢键减少。因此，由于聚合物链释放的应变能，PVA/1 wt% GO-CNF的形状恢复发生在开关温度激活下。这些发现表明，这些混合薄膜具有扩大SMPs在生物医学和水分响应应用（如软机器人和智能纺织品）中的应用的潜力，其中水作为主要刺激。PVA/1 wt% GO-CNF混合膜在37秒内显示出100%的形状恢复。水浸PVA/1 wt% GO-CNF纳米复合材料的Tg降低至24.2℃。PVA/1 wt% GO-CNF纳米复合材料在干燥条件下表现出优异的机械强度。形状记忆行为是由于氢键的减少和塑化效应。

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

Journal of Vinyl & Additive Technology 工程技术-材料科学：纺织

CiteScore

5.40

自引率

14.80%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Vinyl and Additive Technology is a peer-reviewed technical publication for new work in the fields of polymer modifiers and additives, vinyl polymers and selected review papers. Over half of all papers in JVAT are based on technology of additives and modifiers for all classes of polymers: thermoset polymers and both condensation and addition thermoplastics. Papers on vinyl technology include PVC additives.