天然纤维水镁石的深加工及抗菌性能研究

Studies on past-processing and antibacterial properties of natural fibrous brucite

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。

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.