壳聚糖/PVA/纳米SiC复合膜制备及力学性能研究  

Preparation and mechanical properties of chitosan/PVA/nano SiC composite film

作　　者：张伟刚 苏心如 田清泉 Zhang Weigang;Su Xinru;Tian Qingquan(Xi'an Manareco New Materials Co.,Ltd.,Xi'an 710077,Shaanxi,China;College of Chemistry and Materials Science,Weinan Normal University,Weinan 714099,Shaanxi,China)

机构地区：[1]西安瑞联新材料股份有限公司,陕西西安710077 [2]渭南师范学院化学与材料学院,陕西渭南714099

出　　处：《中国胶粘剂》2025年第4期60-65,共6页China Adhesives

基　　金：教育部产学合作协同育人项目(231104082015300);渭南师范学院科研项目(2025HX020)。

摘　　要：以纳米SiC为增强体,丙三醇/聚乙二醇为增塑剂,通过流延成型法制备了壳聚糖/聚乙烯醇(PVA)/纳米SiC复合膜。分别考察了增塑剂和纳米SiC的添加量对复合膜的结构、力学性能的影响。研究结果表明:(1)增塑剂能增强共混膜上的氢键作用强度,并且随着纳米SiC的增加,共混膜中的交联反应有所减少。(2)增塑剂增强了复合膜内交联反应,破坏了复合膜原有的晶体结构,形成新的交联网状结构,从而降低了复合膜的结晶度。通过对比壳聚糖/PVA和SiC的XRD图,表明成功制备了复合膜。(3)增塑剂及纳米SiC的添加均提高了复合膜的力学性能。当增塑剂添加量为20%时,复合膜的力学性能较好。当纳米SiC的添加量为0.02~0.03 g时,复合膜的拉伸强度较大,最高达到37.2 MPa,断裂伸长率达到136%。(4)复合膜的吸水率随纳米SiC含量增加而呈现先增大后降低的变化趋势,纳米SiC颗粒的添加改变了复合膜吸水基团的亲水性。Chitosan/polyvinyl alcohol(PVA)/nano SiC composite film was prepared by flow casting method using nano SiC as reinforcement and glycerol/polyethylene glycol as plasticizer.The effects of adding plasticizer and nano SiC on the structure and mechanical properties of composite film were investigated separately.The research results showed that,(1)Plasticizer could enhance the strength of hydrogen bonding on the composite film,and with the increase of nano SiC,the cross-linking reaction in the composite film was reduced.(2)Plasticizer enhanced the cross-linking reaction within the composite film,disrupted the original crystal structure of the composite film,and formed a new cross-linked network structure,thereby reducing the crystallinity of the composite film.By comparing the XRD patterns of chitosan/PVA and SiC,it was shown that the composite film had been successfully prepared.(3)The addition of plasticizer and nano SiC improved the mechanical properties of the composite film.When the amount of plasticizer added was 20%,the mechanical properties of the composite film were optimal.When the amount of nano SiC added was 0.02-0.03 g,the tensile strength of the composite film was relatively high,reaching a maximum of 37.2 MPa,and the elongation at break reached 136%.(4)The water absorption rate of the composite film showed a trend of first increasing and then decreasing with the increase of nano SiC content,and the addition of nano SiC particles changed the hydrophilicity of the water absorbing groups in the composite film.

关 键 词：壳聚糖 PVA 纳米SIC 增塑剂 复合膜 制备 力学性能 

分 类 号：TQ321.2[化学工程—合成树脂塑料工业]