文章摘要
丙烯酸原位聚合改性纤维素纳米晶体/聚乙烯醇复合膜的制备及性能
Preparation and Properties of Cellulose Nanocrystalline and Polyvinyl Alcohol Modified by Poly(acrylic acid)Films
  
DOI:10.16865/j.cnki.1000-7555.2018.02.027
中文关键词: 聚乙烯醇  改性  纳米纤维素晶体  聚丙烯酸  耐水  力学性能
英文关键词: polyvinyl alcohol  modified  cellulose nanocrystals  poly(acrylic acid)  water stability  mechanical properties
基金项目:国家自然科学基金资助项目(31570578);中央高校基本科研业务费专项资金(JUSRP51622A);江苏高校优势学科建设工程(PAPD)
作者单位
洪铮铮,蒋 学,王鸿博,高卫东 江苏省功能纺织品工程技术研究中心 生态纺织教育部重点实验室(江南大学) 江南大学纺织服装学院,江苏 无锡 214122 
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中文摘要:
      利用丙烯酸原位聚合和纤维素纳米晶体与聚乙烯醇复合制备聚乙烯醇-聚丙烯酸-纤维素纳米晶体(PVA-(PAACNC))复合膜。通过傅里叶变换红外光谱、扫描电子显微镜分析、接触角测试、拉伸试验和透光率测试考察了CNC和PAA的共同添加对复合膜结构形态、耐水性、力学性能和透明性的影响。结果表明,与纯PVA膜相比,改性复合膜仍然保持较高的透光率,在可见光低波段最低只降低5.6%;表面疏水性得到改善,接触角提高了40°以上;只用CNC改性时,所得的PVA-CNC复合膜中CNC的团聚现象比较严重,且力学性能对环境湿度非常敏感;同时用PAA和CNC改性时,所得复合膜中CNC的团聚现象得到明显抑制,在100RH%湿态环境下仍保持较好的力学性能,且断裂伸长率大幅提高。
英文摘要:
      In order to improve the water stability and mechanical properties of polyvinyl alcohol (PVA ) films, PVA-(PAA-CNC) composite films were prepared with polyvinyl alcohol and cellulose nanocrystals (CNC) which were modified with poly(acrylic acid) . The structure of the composite films was characterized by Fourier transform infrared spectroscopy (FT-IR)and scanning electron microscopy(SEM). The physical characteristics of the films, including the water stability, mechanical and transparency properties, were investigated by contact angle test, tensile test and transmittance test. The results show that compared with pure PVA films, PVA-(PAA-CNC) composite films maintain a high transmittance in the visible light band with only 5.6% decreased and the surface hydrophobicity of the films are improved with the contact angle increased by 40°. When PVA is modified with CNC alone, the agglomeration of CNC in the PVA-CNC films is obvious, and the mechanical properties of the films are sensitive to environmental humidity. When PVA is modified with CNC and PAA, the agglomeration is significantly inhibited, meanwhile it can maintain good mechanical properties under 100RH% wet condition with its elongation at break greatly improved.
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