纳米纤维素增强双网络介导水凝胶的制备及性能

Preparation and properties of nanocellulose-enhanced dual network-mediated hydrogels

为了制备具有良好机械性能和导电性能的水凝胶,以聚乙烯醇(PVA)为基体,氯化钠和氧化石墨烯(GO)为介导材料,二甲基亚砜(DMSO)水溶液和甘油为有机溶剂的复合溶液,采用一锅法将其进行反复冻融制备复合水凝胶。通过控制纳米纤维素(CNC)悬浮液的添加量,研究其对复合水凝胶的性能影响,并对复合水凝胶的微观结构、机械性能和电学性能进行表征。结果表明:优化后的CNC-2/GO/NaCl/PVA具有良好的机械性能和优异的自恢复性能,其拉伸强度300 kPa,断裂伸长率297.01%。组装的传感器可以监测手指弯曲和应变发生,在人体运动监测传感设备中具有潜在应用前景。

In order to prepare the hydrogel with good mechanical and electrical conductivity,the composite hydrogel was prepared by repeatedly freezing-thawing in one pot with polyvinyl alcohol(PVA)as the matrix,NaCl and GO as the mediating materials,DMSO aqueous solution and glycerin as the solvent.The effect of nano cellulose(CNC)suspension on the properties of composite hydrogel was studied by controlling its addition amount,and the microstructure,mechanical properties and electrical properties of composite hydrogel were characterized.The results show that the optimized CNC-2/GO/NaCl/PVA has good mechanical properties and excellent self-recovery properties,the tensile strength is 300 kPa and elongation at break is 297.01%.The assembled sensor can monitor finger bending and strain occurrence,and has potential applications in human motion monitoring sensor equipment.