摘要
采用溶液共混法制备聚乙烯醇/凹凸棒石复合材料,探讨凹凸棒石用量和戊二醛用量对复合材料性能的影响。通过傅里叶变换红外光谱(Fourier transform-infrared spectra,FT-IR)、扫描电子显微镜(scanning electron microscopy,SEM)及力学性能测试等对聚乙烯醇/凹凸棒石复合材料进行了分析和表征。力学性能实验结果表明:聚乙烯醇与凹凸棒石共混明显改善了复合材料的力学性能,当凹凸棒石用量为聚乙烯醇用量的1.6%(质量分数,下同)、戊二醛用量为聚乙烯醇用量的4%时,制备的聚乙烯醇/凹凸棒石复合材料力学性能较好,拉伸强度为22.97 MPa,断裂伸长率为199.17%。FT-IR和SEM分析结果表明:复合材料中聚乙烯醇和凹凸棒石之间存在强烈的相互作用和良好的相容性。复合材料的热稳定性高于聚乙烯醇膜。
Attapulgite （AT） was dispersed into polyvinyl alcohol （PVA） matrix to obtain PVA/AT composites through blending method with different compositions, which were investigated with different amounts of AT and glutaraldehyde （relative to the mass of PVA）. The composites were characterized by Fourier transform infrared spectroscopy （FT-IR）, scanning electron microscopy （SEM） and universal matertial testing machine. The mechanical properties of the PVA/AT composites were optimized. The tensile strength and elongation at break of the composite prepared by adding 1.6% AT and 4% glutaraldehyde were 22.97 MPa and 199.17%, respectively. The results indicated that the FT-IR characteristic peaks of PVA/AT composites appeared when introducing AT, and the mechanical performance of blend films was improved due to the strong interaction between PVA and AT. The thermostability of PVA/AT composites was better than that of the PVA film.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2015年第17期109-113,共5页
Food Science
基金
湖北省教育厅科学技术研究计划青年人才项目(Q20141905)
