纳米碳酸钙在运动草坪纤维中的应用研究

利用硅烷偶联剂A和超分散剂B对纳米CaCO3进行干法表面处理,通过熔融纺丝的方式制得纳米CaCO3改性的线性低密度聚乙烯(LLDPE)运动草坪纤维.借助电子织物强力机、差示扫描量热仪、扫描电子显微镜等手段,研究了改性纳米CaCO3在纤维中的分散状况及其对纤维性能的影响.结果表明,填充硅烷偶联荆A和超分散剂B复配处理纳米CaCO3的纤维性能最好,断裂伸长率最多可达131%,比未填充纳米CaCO3时高22.8%;干热收缩率最低可达27%,比未填充纳米CaCO3时降低了5.2%;纤维的结晶度随着CaCO3填充量的增加有上升的趋势,由30.5%增加到32.5%;纳米CaCO3粒子在纤维中达到了较好的分散效果.

APPLICATION STUDY OF NANO-CALCIUM CARBONATE IN GYMNASTIC ARTIFICIAL TURF FIBERS

Nano-Calcium Carbonate (CaCO3) was modified with Silane coupling agent A and hyperdispersant B by dry surface modification. The linear low density polyethylene (LLDPE)/nano-CaCO3 gymnastic artificial turf fibers were prepared by melt spinning. The influences of nano-CaCO3 on the structure and mechanical properties of LLDPE fibers were determined by Electric Fabric Strength Tester, Differential Scanning Calorimetry(DSC) and scanning electron microscopy(SEM), etc. The results showed that the properties of fibers filled with nano-CaCO3 modified by complex treatment (A and B) were the best. The maximum value of elongation was 131%, and 22.8% higher than the fibers unfilled with nano-CaCO3. The lowest thermal shrinkage rate which was 27% decreased by 5.2% compared with samples unfilled with nano-CaCO3. The crystallinity of fibers increased from 30.5% to 32.5% with the amount of filled nano-CaCO3 increasing. The nano-CaCO3 particles could be dispersed in nano-size in fibers.