通过将单宁酸负载于多壁碳纳米管(MWCNT)表面,并与聚丙烯酸(PAA)、聚乙烯醇(PVA)及植酸(TA)通过氢键及π-π堆积等相互作用构建了PAA/PVA/MWCNT-TA复合导电水凝胶。采用扫描电镜(SEM)、和热重(TG)对PAA/PVA/MWCNT-TA复合导电水凝胶的结构与热稳定性进行表征,系统考察了其含水量、溶胀率、粘附性能、力学性能及导电传感性能。结果表明:MWCNT-TA的引入形成了稳定的结构骨架,赋予水凝胶均匀的多孔结构;当MWCNT质量分数为0.5%时,PAA/PVA/MWCNT-TA复合导电水凝胶的拉伸强度和断裂伸长率分别达到0.29MPa和218.28%,表现出良好的力学性能和抗疲劳性能。此外,其对多种基底表现出良好的粘附性,并具有稳定的导电性能和应变响应能力,可实现对人体关节运动的实时监测。在柔性可穿戴传感器领域具有良好的应用潜力。
By loading tannic acid onto the surface of multi-walled carbon nanotubes (MWCNTs) and integrating them with polyacrylic acid (PAA),polyvinyl alcohol (PVA),and phytic acid (TA) through interactions such as hydrogen bonding and π-π stacking,a PAA/PVA/MWCNT-TA composite conductive hydrogel was prepared.The structure and thermal stability of the PAA/PVA/MWCNT-TA composite conductive hydrogel were characterized using scanning electron microscopy (SEM) and thermogravimetric analysis (TG).Its water content,swelling ratio,adhesion properties,mechanical properties,and conductive sensing performance were systematically investigated.The results showed that the introduction of MWCNT-TA formed a stable structural framework,endowing the hydrogel with a uniform porous structure.When the mass fraction of MWCNTs was 0.5%,the tensile strength and elongation at break of the PAA/PVA/MWCNT-TA composite conductive hydrogel reached 0.29 MPa and 218.28%,respectively,demonstrating good mechanical properties and fatigue resistance.In addition,it exhibited strong adhesion to various substrates,along with stable electrical conductivity and strain-responsive capability,enabling real-time monitoring of human joint movements.The hydrogel holds promising application potential in the field of flexible wearable sensors.
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基金资助
陕西省重点研发计划(2025SF-YBXM-098);陕西省教育厅青年创新团队项目(25JP166);西安市科技局高校院所科技人员服务企业项目(2025JH-GXKJRC-0099);西安医学院博士科研启动基金项目(2025BS07);陕西高校青年创新团队建设项目(2022-85);陕西省体育局科研项目(20260980);陕西省大学生创新创业训练计划项目(S202511840081、S202611840090)
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