文献类型：期刊文献

英文题名：A Novel Chitosan/Polyvinyl Pyrrolidone (CS/PVP) Three-Dimensional Composite and Its Mechanism of Strength Improvement

作者：Zeng, Minfeng[1];Xiao, Huiquan[1];Zhang, Xin[1];Sun, Xudong[1];Qi, Chenze[1];Wang, Baoyi[2]

机构：[1]Shaoxing Univ, Inst Appl Chem, Shaoxing 312000, Peoples R China;[2]Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China

年份：2011

卷号：50

期号：7

起止页码：1413

外文期刊名：JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS

收录：SCI-EXPANDED(收录号：WOS:000297728900004)、、EI(收录号：20122015013503)、Scopus(收录号：2-s2.0-84860743423)、WOS

基金：This work was supported by the Nature Science Foundation of Zhejiang Province, China (grant number Y4080448) and the Nature Science Foundation of China (grant number 10875079).

语种：英文

外文关键词：chitosan; hydrogen bonding; strength

外文摘要：Novel biodegradable three-dimensional (3D) composites with good mechanical properties have been prepared by coagulation of a chitosan/polyvinyl pyrrolidone (CS/PVP) solution in NaOH. For example, the strength and modulus of CS/PVP (1/1) were 82.5 MPa and 1.86 GPa, increasing 237% and 644% compared with CS, respectively. Scanning electron microscopy and Fourier transform infrared analysis suggest that the PVP component did not dissolve during the preparation process. The nonsolution of the composites is attributed to the extremely strong hydrogen bonding formed between the CS and PVP macromolecules. It was also found that there are synergistic effects between the formation of hydrogen bonding with PVP and cross-linking with glutaraldehyde (GA) for the improvement in the mechanical properties of CS. The mechanism of strength improvement has been discussed thoroughly from the aspects of free volume.