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1、本科毕业设计(论文)玻璃微珠的改性学院专业年级班别学号学生姓名指导教师空心玻璃微珠的改性摘要空心玻璃微珠具冇屮空、质轻、密度小、粒径均匀等优点,通过对其进行表面改性,可以得到质轻、易回收的功能微珠。一般的玻璃微珠是绝缘体,若对其表面进行化学镀银,则使其具冇良好的导电性能。空心玻璃微珠这种超细粉体材料,其比表面积较大,在其表面进行化学镀银会容易降低镀液的稳定性,因此选择合适的化学镀工艺非常重要。本实验研究了玻璃微珠表而化学镀银不同的工艺参数,选择葡萄糖作为述原液,银氨溶液为主盐溶液,选择碱洗、粗化、每攵化、活化的预处理步骤,然后对预处理后的玻璃微珠实施化学镀银。对预处理每个步骤都进
2、行优化,并利用正交试验对镀银过程的条件进行最优化。通过万能电用表对其进行压实电阻检测,得出最优方案:预处理毎个步骤进行的时间均为lOmim粗化剂用10g/L亚硫酸钱水溶液,敏化剂SnCh溶液定为20g/L,活化时AgNO3浓度为10g/L。镀银过程中条件确定为:温度常温(25°C),反应时间为lh,葡萄糖浓度为15g/L,PII值为12o最优方案得出的实验成品压实屯阻检测为0.1Q。结果显示:本实验正交优化的方法能够制得导电性能较好的镀银空心玻璃微珠。关键词:玻璃微珠,改性,化学镀银,导电性能AbstractAsakindoffinepowdermaterials,cenosph
3、ereisendowedwithmanycharacteristics,suchashollow,lightweight,smallsizeandnon-toxicity.Usually,glassbeadsisaninsulator,ifcarriedtoitssurfacesilverplating,ithasagoodelectricalconductivitycenospheres9specificsurfaceishigh,sothebathstabilizationisreducedwhiledoingelectrolessplatinhe.Soitisimporta
4、nttoselectfeasibleprocessofelectrolessnickelplatingtocontrolthebathstabilization,depositionspeedatsomeextentanddispersingofcenospheresinthebathuniformly.Thisstudybasedonmanyglassbeadsmodifiedelectrolessplatingmethods-Pretreatmentprogramforhollowglassbeadsarealkalinecleaning,coarsening,sensiti
5、zation,activation.Andsilverplatingwithsilverammoniasolutionandglucose.Optimizethepretreatmentbysinglefactorexperimentbuttheelectrolessplatingbyorthogonaltest.Andtestingthecompactresistancebythemultimete匚Theoptimaltechnologicalconditionsareobtained,eachpretreatmentprogramtimeis10min,coarsening
6、using10g/Lammoniumsulfitesolution,SnC12solutionat20g/L,concentrationofAgNO3at10g/L.Intheprocessofsilverplatingconditionsidentifiedas,temperatureundernormaltemperature(25°C),reactiontimeof1h,concentrationsofglucoseat15g/L,thePHof12.Theexperimentalproductsofthisoptimalschemecompactionresistance
7、detectingat0.1Q.Theresultsshowedthat:theorthogonalexperimentmethodcanobtainbetterconductivepropertiesofsilverplatedhollowglassbeads.Keyword:Glassbeads,modification,electrolesssilverplating,Conductivity1绪论11.1弓丨言11.2玻璃微珠表面改性技术11.2.1表面化学改性11.2.