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1、...页眉纳米二氧化钛改性丙烯酸树脂皮革涂饰剂的研究摘要纳米二氧化钛，亦称纳米钛白粉。从尺寸大小来说，通常产生物理化学性质显著变化的细小微粒的尺寸在100纳米以下，其外观为白色疏松粉末。具有抗紫外线、抗菌、自洁净、抗老化功效，可用于化妆品、功能纤维、塑料、油墨、涂料、油漆、精细陶瓷等领域。本课题用超声波和分散剂协同分散金红石晶型纳米二氧化钛粉体，进行了分散剂的选择，通过悬浮液的稳定性的比较最终确定较佳的分散工艺：在纳米TiO2浓度为5％的条件下，分散剂六偏磷酸钠浓度0．3％、超声分散功率为540W，超声分散时间为30min。向四口烧瓶中加入水、十二烷基硫酸钠、OP-10、丙烯酸。搅拌15m
2、in(可先预先加热油浴到42℃)加入主单体（甲基丙烯酸甲酯，丙烯酸丁酯）总量的20%，乳化45min。升温到75℃，开始滴加引发剂，1小时加完。加剩余主单体同时在另一滴管中加N-羟基丙烯酰胺、丙烯酸，1小时同时加完，然后加引发剂，30min加完，加冷凝水。74-76℃保温2h。降温到50℃，加氨水调pH值(7~8)，制得丙烯酸树脂乳液，与纳米二氧化钛共混，制得改性后的乳液，应用于皮革，发现皮革耐黄变性增强，吸水率变化不大，物理机械性能及耐干湿擦强度均得到提高。关键词：纳米TiO2，分散，丙烯酸树脂，皮革涂饰剂....页脚...页眉Nano-titaniumDioxideModifiedAc
3、rylicResinLeatherFinishingStudiesABSTRACTTitaniumdioxide,alsoknownasnano-titaniumdioxide.Fromthesize,ittypicallyproducesasignificantchangeinphysicalandchemicalpropertiesofthefineparticlesizeof100nanometersorless,theappearanceofloosepowderiswhite.Withanti-ultraviolet,antibacterial,self-cleaning,ant
4、i-agingeffects,canbeusedincosmetics,functionalfibers,plastics,inks,coatings,paints,fineceramicsandotherfields.Thesubjectultrasonicanddispersantcoordinateddistributedrutiletitaniumdioxidepowdersweredispersantselectedthroughcomparisonofthestabilityofthesuspensiontofinalizeabetterdispersionprocess:In
5、thenano-TiO2concentrationof5%oftheconditions,adispersingagentconcentrationof0.3%sodiumhexametaphosphate,ultrasonicdispersingpowerof540W,ultrasonicdispersiontimewas30min.Intoafour-neckedflaskwasaddedwater,sodiumlaurylsulfate,OP-10,acrylicacid.Stirring15min(maybepre-heatedoilbathto42℃)addedtothemain
6、monomer(methylmethacrylate,butylacrylate)20%oftotal,emulsifying45min.Heatedto75℃,begandroppinginitiator1houradditionwascomplete.PlusanotherwhileremainingdroppermainmonomeraddedN-hydroxyacrylamide,acrylicacid,1hour,whiletheadditionwascomplete,thenaddingtheinitiator,30minadditionwascomplete,addconde
7、nsate.74-76℃insulation2h.Cooledto50℃,addingammoniatoadjustpH(7-8)togiveacrylicresinemulsion,blendedwithtitaniumdioxide,toobtainthemodifiedemulsionusedinleather,leatherfoundenhancedresistancetoyellowing,waterabsor
