摘要
以二甲基亚砜(DMSO)为增塑剂,通过熔融共混法制备了一种新型热塑性淀粉(TPS),研究不同增塑剂含量对材料结构和性能的影响,并与甘油及甘油/水复合增塑淀粉体系进行了比较.FTIR结果显示,DMSO能够与淀粉产生强烈而稳定的氢键相互作用.WAXD和SEM的研究结果表明,DMSO的加入破坏了淀粉的有序结构,实现了淀粉的塑化,形成均一的非晶连续相.同甘油及甘油/水增塑体系相比,DMSO与淀粉的羟基形成更为稳定的氢键,能够有效抑制淀粉的重结晶.动态力学和拉伸力学性能测试结果表明,经过DMSO的增塑,有效降低了淀粉的玻璃化转变温度,改善了材料的韧性,增塑效率要好于甘油及甘油/水复合增塑体系.
A novel thermoplastic starch was prepared by melting processing method using dimethyl sulfoxide （DMSO） as a plasticizer. The effect of the plasticizer was investigated by a combination of FTIR, XRD, SEM, DMA and tensile testing techniques, and was compared with the more conventional plasticizers, glycerol and glycerol/water. FTIR analysis show that DMSO act as a hydrogen bond acceptor and can form stable hydrogen bonds with starch. XRD and SEM results indicate that the crystalline of starch is destructed and the starch granules transferred to a continuous amorphous phase. It was found that the DMSO could more effective- ly restrain the retrogradation than the plasticizers, glycerol and glycerol/water, due to the stronger hydrogen bonds. The mechanical analysis showed that the effect of the DMSO was better than glycerol and, glycerol/water.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第8期1662-1667,共6页
Chemical Journal of Chinese Universities
基金
中国科学院方向性项目(批准号:KTCX-YW-208)资助
关键词
热塑性淀粉
二甲基亚砜
氢键
Thermoplastic starch
Dimethyl sulfoxide（DMSO）
Hydrogen bond
