探索纳米无机复合抗菌粉体制备工艺研究

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1、分类号——密级——单位代码：学号：’西北大学硕士学位论文指导教师董垂垂专业技术职务塾撞学科(专业)垡堂三茎答辩日期学位授予日期二OO五年五月采镶瓣勿全文公布一羔一摘要纳米无机复合抗菌粉体的制备工艺首次采用以Ag+沉淀物作为晶核，外包裹Ti、Zr等余属的氢氧化物沉淀和磷酸盐沉淀物的多步沉淀工艺，利用单因素和『F交试验法对制备工艺进行优化。最佳工艺条件是：原料液浓度1209／L：水解反应温度120℃：反应时fnjO．5h；反应沉淀物采取洗涤．乳化、普通烘箱干燥，80℃，3h：1100℃煅烧1．5h；组合分散剂ZA表面改性。粒径及外形分析表

2、明：粉体平均粒径50nm．粒子基本上呈球形且粒度分布较窄；由X射线荧光光谱分析得到产品的化学组成式为：Ag003Zro．18Ti0．33PollO0．34。抗菌试验表明：无外加光照，粉体浓度100mg／L时，对大肠杆菌、会黄色葡萄球菌和白色念珠菌均有较强的抗菌效果，30min内抗菌率达100％，克服了已有银系抗菌剂对真菌抗菌效果不佳、易变色及钛系抗菌剂需光照爿能发挥抗菌功效等缺点。本论文还初步探讨了以涂覆法制备抗菌纺织品，检测结果表明其具有较强的抗菌效果，进一步验证了陔粉体制备工艺的可行性与可靠性。关键词：无机抗菌剂，纳米复合材料，制

3、各，过程分析，抗菌纺织品ThePreparationTechnologyResearchonNanoInorganicCompositeAntibacteriaIPowderAbstractMultistepdepositionprocesshasbeenadoptedforthefirsttimeinthepreparationofnanoinorganiccompositeantibacterialpowder,Ag+ascrystalnucleus，packedoutsidebythehydroxidandphosphatepr

4、ecipitateOfTi、Zrmetaletc．．Theoptimalprocessconditionshavebeenfoundfromone-factorinfluencetestsandmulti-factororthogonaltests：theconcentrationofstuffwas1209／L；Hydroiyzationreactionternperaturewas120℃；Reactiontimewas0．5h；1100℃，1．5hourscalcinationandsurfacemodificationwith

5、compoundingdispersantZA．Theparticlesizeanalysisshowedthattheaveragediameterwas50nm，theparticlesweresphericityonthewholeandthesizedistributionwasquitenarrow；ThechemistryconstitutemodelwasobtainedbyXRF：Ag0．03Zrot5Ti0．33Po110o34testsshowedthatthepowderhas100％bactericidalac

6、tiononE,co虬S．auresandC．a曲icanswithin30minuteswithlOOmg／Lundertheconditionofdarkenvironment．TheproblemthattheAg—seriesinorganicantibacterialagenthasabadrestraining。‘effectonfungiandTi·‘seriesinorganicantibacterialagentmakeslesseffectundertheconditionofdarkenvironmentwere

7、successfullyresolved．Besides，theproblemofAg—antibacterialagenttarnishinghasbeenresolved．preparationprocessofantibacterialfabricwithsmear-Covertechniquehavebeenstudiedprimarilyinthispapectestsindicatedthatthefabrichasstrongkillingeffectsonfungi，andthefeasibilityandreliab

8、ilityofthepreparationprocessofthepowderhavebeenproved．JianhuaYi(ChemicalTechnology)DirectedbyProf．YueyuanHuang