Nanocomposite Polymer Hydrogels Reinforced by Carbon Dots and Hectorite Clay  

作　　者：MA Shuai ZHENG Hang CHEN Yanjun ZOU Jincheng ZHANG Chaocan WANG Yifeng 

机构地区：[1]School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2020年第2期287-292,共6页武汉理工大学学报（材料科学英文版）

基　　金：the National Natural Science Foundation of China(Nos.51873167 and 50803048);the 2018 National College Students Innovation and Entrepreneurship Training Program Project Funding(No.20181049701035)。

摘　　要：Herein, two nanoparticles with different dimensions, spherical carbon dots (C-dots) and sheetlike hectorite clay, were used as physical crosslinkers to fabricate C-dots-clay-poly(N-isopropylacrylamide)nanocompositehydrogels (coded as C-dots-clay-PNIPAm hydrogels). The mechanical properties, fluorescence features and thermal-responsive properties of the C-dots-clay-PNIPAm hydrogels were evaluated. The experimental results indicate that synergistic effects of C-dots and hectorite clay nanoparticles are able to significantly enhance mechanical properties of the hydrogels. The hydrogels can be stretched up to 1730%with strength as high as 250 kPa when the C-dots concentration is 0.1wt%and the clay concentration is 6wt%. The hydrogels exhibit complete self-healing through autonomic reconstruction of crosslinked network a damaged interface. The hydrogels show favorable thermal-responsive properties with the volume phase transition around 34℃. In addition, the hydrogels are endowed with fluorescence features that are associated with C-dots in the hydrogels. It can be expected that the as-fabricated C-dots-clay-PNIPAm hydrogels are promising for applications in sensors, biomedical carriers and tissue engineering.

关 键 词：polymer hydrogels NANOCOMPOSITE REINFORCEMENT carbon dots hectorite clay 

分 类 号：TQ427.26[化学工程]