基于聚N-异丙基丙烯酰胺的光热响应水凝胶的制备与表征
Preparation and Characterization of Photothermal Response Hydrogels Based on Poly(N-isopropylacrylamide)
董桂芳 1周展鹏 2胡梦亭 1曾小平 1王大威 1王玮 2吴江渝1
作者信息
- 1. 武汉工程大学材料科学与工程学院,武汉 430205
- 2. 华中科技大学材料科学与工程学院,武汉 430074
- 折叠
摘要
通过一锅法制备了含有氧化石墨烯(GO)的聚N-异丙基丙烯酰胺(PNIPAM)/聚乙烯醇(PVA)光热响应纳米复合水凝胶,并对产物的形貌、结构及性能进行了表征.研究了PVA对PNIPAM/PVA水凝胶透光率的影响,以及GO含量对PNIPAM/PVA/GO水凝胶力学性能和光热响应的影响.结果表明,在PNIPAM水凝胶中引入PVA后,并未影响低临界溶解温度(LCST),LCST值仍为32 ℃;扫描电子显微镜表明GO/PNIPAM/PVA纳米复合水凝胶结构紧密,孔洞大小均一;当GO含量为NIPAM质量的0.89％时,制备的GO/PNIPAM/PVA水凝胶具有最佳力学性能,拉伸强度为40.1 kPa,断裂伸长率可达335.6％;近红外光(NIR)照射GO含量为NIPAM质量的1.11％的GO/PNIPAM/PVA水凝胶150 s,其温度能从17.2 ℃升到42.5 ℃,具有优异的光热性能.
Abstract
Poly(N-isopropylacrylamide)(PNIPAM)/poly(vinyl alcohol)(PVA)photothermal responsive nanocomposite hydrogels containing graphene oxide(GO)were prepared by a one-pot method,and the morphology,structure,and properties of the products were characterized in this study.The effect of PVA on the transmittance of PNIPAM/PVA hydrogel and the effect of GO content on the mechanical properties and photothermal response of PNIPAM/PVA/GO hydrogel were studied.The results showed that the introduction of PVA into PNIPAM hydrogel did not affect its lower critical solution temperature(LCST)value,and the LCST value was still 32 ℃.Scanning electron microscopy results showed that the GO/PNIPAM/PVA nanocomposite hydrogel had a compact structure and uniform pore size.When the GO content is 0.89％of the mass of NIPAM,the prepared GO/PNIPAM/PVA hydrogel has the optimal mechanical properties,the tensile strength is 40.1 kPa,and the elongation at break can reach 335.6％.The GO/PNIPAM/PVA hydrogel with GO content of 1.11％of NIPAM mass was irradiated by near-infrared light(NIR)for 150 s,and its temperature could rise from 17.2 ℃ to 42.5 ℃,showing excellent photothermal performance.
关键词
N-异丙基丙烯酰胺/聚乙烯醇/氧化石墨烯/光热响应Key words
N-isopropylacrylamide/Poly(vinyl alcohol)/Graphene oxide/Photothermal response引用本文复制引用
出版年
2024
NETL
NSTL
万方数据