Thermoresponsive nanocomposite hydrogels with improved properties based on poly(N -vinylcaprolactam)
Thermoresponsive nanocomposite hydrogels with improved properties based on poly(N -vinylcaprolactam)
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DOI：
10.1016/j.mtcomm.2020.101041
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发表时间：
2020-09-01
影响因子：
3.8
通讯作者：
Licea-Claverie, Angel
中科院分区：
文献类型：
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作者：
Cerda-Sumbarda, Yadira D.;Dominguez-Gonzalez, Carolina;Licea-Claverie, Angel
在这项工作中，聚（N-乙烯基己内酰胺）（PNVCL）水凝胶填充纳米凝胶作为软填料和纳米粘土作为硬填料，以产生增强材料。它们是通过自由基光聚合制备的，纳米粒子负载量高达1重量%，添加化学交联剂。介绍了填料和交联剂对复合材料热性能、溶胀性能和力学性能的影响。结果表明，通过机械压缩测试，溶胀的水凝胶的杨氏模量在170-4500 KPa之间，使用纳米凝胶填料获得的值更高。另一方面，通过从室温加热到37摄氏度，水凝胶的热收缩率高达50%，而杨氏模量增加2.1倍。标题纳米复合水凝胶作为响应性生物材料显示出潜在的应用前景。
In this work poly(N-vinylcaprolactam)(PNVCL) hydrogels were filled with nanogels as soft fillers and with nanoclays as hard fillers to yield reinforced materials. They were prepared by radical photopolymerization with nanoparticle loads of up to 1 wt%, adding a chemical crosslinker. The effect of the fillers and crosslinker in the thermal, swelling and mechanical properties is described. Results show that Young's moduli of swelled hydrogels are between 170-4500 KPa by mechanical compression tests, the higher values obtained by using nanogel fillers. On the other side the thermal shrinkage of the hydrogels by heating from room temperature to 37 degrees C is up to 50 %, while the Young modulus increases 2.1 times. The title nanocomposite hydrogels show potential application as responsive biomaterials.