超临界CO_(2)制备TPU/SiO_(2)复合泡沫及其性能研究  

Study on preparation and properties of TPU/SiO_(2) composite foam by supercritical CO_(2)

作　　者：邬明杰 邵亮[1] 樊永康 张紫薇 谢松军 WU Ming-jie;SHAO Liang;FAN Yong-kang;ZHANG Zi-wei;XIE Song-jun(College of Chemistry and Chemical Engineering,Key Laboratory of Chemical Additives for China National Light Industry,Shaanxi University of Science&Technology,Xi′an 710021,China;Jihua 3513 Industrial Co.,Ltd.,Xi′an 710026,China)

机构地区：[1]陕西科技大学化学与化工学院,中国轻工业轻化工助剂重点实验室,陕西西安710021 [2]际华三五一三实业有限公司,陕西西安710026

出　　处：《陕西科技大学学报》2024年第3期91-97,共7页Journal of Shaanxi University of Science & Technology

基　　金：陕西省科技厅创新能力支撑计划项目(2021TD-16);陕西省教育厅服务地方专项科技计划项目(23JC018);陕西省西安市科技计划项目(22GXFW0001)。

摘　　要：采用热塑性聚氨酯弹性体(TPU)作为基体,纳米二氧化硅(SiO_(2))充当填料,超临界二氧化碳(scCO_(2))为发泡剂,通过简单的物理共混的方式以及scCO_(2)发泡设备制备了TPU/SiO_(2)复合发泡材料;探究了不同SiO_(2)含量对复合发泡材料的影响.结果表明,纳米SiO_(2)粒子在TPU基体中有良好的分散性,所制备的TPU/SiO_(2)复合发泡材料混合均匀;纳米SiO_(2)粒子的添加调控了复合材料的发泡行为,使其泡孔尺寸稳定、分布范围从60~180μm下降至20~40μm.SiO_(2)粒子有效提高了TPU基体的结晶性,从而使得回弹从40上升至42,硬度从45.3 Shore C上升至54.38 Shore C;抗张强度从1.18 MPa上升至4.19 MPa,断裂伸长率从237.25%上升至460.03%.Using thermoplastic polyurethane elastomer(TPU)as matrix,nano-silica(SiO_(2))as filler and supercritical carbon dioxide(scCO_(2))as foaming agent,TPU/SiO_(2) composite foaming materials were prepared by simple physical blending and scCO_(2) foaming equipment.The effects of different SiO_(2) contents on the composite foaming materials were investigated.The results show that the nano-SiO_(2) particles have good dispersion in the TPU matrix,and the prepared TPU/SiO_(2) composite foaming material is uniformly mixed.The addition of SiO_(2) particles regulates the foaming behavior of the composites,making the cell size stable and the distribution range decreased from 60~180μm to 20~40μm.The SiO_(2) particles effectively improved the crystallinity of the TPU matrix,so that the rebound increased from 40 to 42,and the hardness increased from 45.3 Shore C to 54.38 Shore C;the tensile strength increased from 1.18 MPa to 4.19 MPa,and the elongation at break increased from 237.25%to 460.03%.

关 键 词：热塑性聚氨酯弹性体 纳米二氧化硅 二氧化碳 超临界发泡 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]