【摘要】 以天然纤维水镁石为主要原料,对其进行破碎、超细粉碎深加工,利用超细粉碎-表面改性一体化工艺技术将纤维水镁石超细粉体与少量Cu2+、Zn2+和Cu2+/Zn2+抗菌剂复合,制备出了具有灭菌率达99%的天然水镁石抗菌剂。将各型抗菌剂与聚丙烯(PP)、接枝聚丙烯熔融混炼后制成抗菌母粒,按一定比例与PP复合制备抗菌复合材料。结果表明,抗菌母粒添加量为10%(天然水镁石抗菌剂为5%)时,抗菌复合材料的力学性能最佳,抗菌复合材料的抗菌性能较好,对大肠杆菌和金黄色葡萄球菌的抑菌率都超过81%。此外,Cu2+/Zn2+复合纤维水镁石抗菌剂中存在Cu2+、Zn2+协同抗菌效应。更多还原

【Abstract】 Using the natural fibrous brucite as main raw materials,the ultrafine fibrous brucite powders were prepared through crushing and ultrafine grinding.The natural fibrous brucite antibacterial agents,with sterilizing rate up to 99%,through the composite of a small amount of antibacterial agents of Cu2+,Zn2+ or Cu2+/Zn2+ and natural fibrous brucite ultrafine powders by the integrative technique of ultrafine grinding and surface modification,were prepared.Copper-type,zinc-type and copper-zinc complex type antimicrobial agent were introduced into polypropylene to form an antimicrobial masterbatch,which was used in the antimicrobial composite materials.When the content of antimicrobial masterbatch was 10%(5% antimicrobial agent),the antimicrobial composite materials had the best mechanical property,the bactericite efficiency was above 81% to escherichia coli and staphylococcus aureus.Furthermore,in the copper-zinc complex type antimicrobial composite materials,synergic effect between copper and zinc ions was observed.更多还原