复合改性蒙脱石/抗菌聚氨酯的制备及性能研究

Study on Preparation and Performances of the Modified Montmorillonite/Antibacterial Polyurethane

蒙脱石经硝酸银和十六烷基三甲基溴化铵改性后与聚氨酯复合制成抗菌材料。采用XRD对改性前后蒙脱石的结构进行了分析和表征,采用抑菌圈法对样品进行了抗菌性能检测和研究。结果表明,硝酸银和十六烷基三甲基溴化铵复合改性蒙脱石,可以形成不同面网间距的层状结构。十六烷基三甲基铵离子插层率达到59%,络合银离子插层率达到38%,两者协同发挥抗菌作用,既保证了优异的短期效果,又使得长期抗菌作用明显;抗菌效果与抗菌剂的含量成正比关系。从经济角度和生产成本考虑,实际生产中复合抗菌剂的添加量应以2.0%为宜。

Antibacterial polyurethane was prepared with montmorillonite modified by silver nitrate and CATB（hexadecyl trimethyl ammonium bromide）.The structure and antibacterial performances of samples were studied by XRD,inhibition zone method.The results showed that different crystal plane spacing of montmorillonite modified by silver nitrate and CATB may be formed.Intercalation ratio of montmorillonite was 59 % by CATB,and 38 % by Ag＋.Both short-term effect and long-term effect can formed because synergistic effect of CATB and Ag＋.Antibacterial effect is a proportional relation with content of antibacterial montmorillonite,the optimal content of that is 2.0 %.