Preparation and Characterization of Chemically Crosslinked Polyvinyl Alcohol/Carboxylated Nanocrystalline Cellulose Nanocomposite Hydrogel Films with High Mechanical Strength

被引：9

作者：

Li, Bengang ^{[1
]}

Cao, Jianpeng ^{[1
]}

Cao, Xuzhi ^{[1
]}

Guo, Bin ^{[1
]}

Lu, Hongwei ^{[2
]}

机构：

[1] Nanjing Forestry Univ, Coll Sci, Nanjing 210037, Jiangsu, Peoples R China

[2] Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou 310018, Zhejiang, Peoples R China

来源：

JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS | 2016年 / 55卷 / 05期

基金：

中国国家自然科学基金;

关键词：

mechanical properties; nanocrystalline cellulose; nanocomposite hydrogel; polyvinyl alcohol; swelling behavior; thermal properties; MORPHOLOGY;

D O I：

10.1080/00222348.2016.1171068

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Chemically crosslinked polyvinyl alcohol (PVA)/carboxylated nanocry-stalline cellulose (PVA/CNCC) nanocomposite hydrogel films were fabricated by film-casting of PVA/CNCC mixture solutions and subsequent thermal-curing of the PVA with the CNCC. Gel fractions of the hydrogel films were measured to confirm the occurrence of crosslinking. Morphologies of the hydrogel films were characterized by polarized light microscopy and scanning electron microscopy (SEM). Thermal properties, swelling behavior and mechanical properties of the hydrogel films were investigated to evaluate the influence of CNCC content (10 approximate to 30% of PVA mass). Equilibrium water content of the hydrogel films was in the range of 40 approximate to 49%. At swelling equilibrium, the hydrogel films could be stretched to 3 approximate to 3.4times their original length, and their tensile strength was in the range of 7.9 approximate to 11.6MPa. The results show that the PVA/CNCC nanocomposite hydrogel films were both extensible and highly tough.

引用

页码：518 / 531

页数：14