抗菌纳米ZnO对聚丙烯的增韧增强及抗菌作用研究.pdfVIP

抗菌纳米ZnO对聚丙烯的增韧增强及抗菌作用研究 卢秀萍 天津科技大学材料科学与化工学院，天津300222 摘要：采用偶联剂处理法对抗菌纳米ZnO表面进行改性，制备PP/抗菌纳米ZnO复合材料，研究抗菌纳米ZnO对 PP的增韧增强及抗菌作用。结果表明：改性抗菌纳米ZnO不仅对PP有明显的增韧增强作用，又可赋予PP复合材料 优良的抗菌性能。抗菌纳米ZnO用量为3％时，复合材料的拉伸强度、断裂伸长率、球压硬度、缺口和无缺口冲击强 度、维卡软化温度分别较纯PP提高7.9MPa(38.2％)、137.5％、9.5MPa(12.1％)、4.4kJ·m-2(75.9％)和8.6kJ ·m-2(38.1％)、14.4℃；复合材料对大肠杆菌和金色葡萄球菌的抑菌率分别达到90.8％和88.2％。 关键词：改性抗菌纳米ZnO；聚丙烯；复合材料;增韧增强；抗菌性能 Researchontoughening,strengtheningandantibacterialeffectsof antimicrobialnano-ZnOonpolypropylene LUXiuping CollegeofMaterialScienceandChemistryEngineering,TianjinUniversityofScienceand Technology,Tianjin300457,China Abstract:Antibacterialnano-ZnOwassurfacemodifiedbycouplingagentandthenusedtopreparePP/antibacterial nano-ZnOcomposites.Toughening,strengtheningandantibacterialeffectsofantimicrobialnano-ZnOonpolypropyl enewereinvestigated.Theresultsshowthatantibacterialnano-ZnOcannotonlyimprovethestrengthandtoughness ofPP,butalsoprovideexcellentantimicrobialpropertyforPPcomposites.Atanano-ZnOloadingof3％,theten silestrength,breakingelongation,ballhardness,notched(no-notched)impactstrengthandVicatsofteningtem peratureofthecompositeincreased7.9MPaor38.2％,137.5％,9.5MPaor12.1％,4.4kJ ·m-2or75.9％ (8.6kJ·m-2or38.1％)and14.4℃ thanthoseofpurePPrespectively.Bacterialresistanceofthecompositesto colonbacillusandgoldenstaphylococcuswere90.8％ and88.2％,76.24％. Keywords:modifiedbacterialresistantnano-ZnO;polypropylene;composite;tougheningandstrengthening; bacterialresistance ？司；大肠葶 ·天津科技： }的缺口冲击强 ZnO用 量 的j 即随抗菌纳米 菌性能 r量的增长而{ 抑菌率趋于1 时女肠杆菌和