聚羧基/甲基倍半硅氧烷纳米杂化乳液的合成与表征

摘要

以甲基三乙氧基硅烷(M T ES)为前驱体,γ-氨丙基三乙氧基硅烷(K H550)和马来酸酐(MA)制得羧基硅烷(CTES)为改性剂,氢氧化钠(NaOH)为催化剂,脂肪醇聚氧乙烯醚(AEO3/AEO9)为复合乳化剂,通过水解-缩合反应在水溶液中制得了一系列聚羧基/甲基倍半硅氧烷(PCM SQ)纳米杂化乳液.研究了乳化剂用量、催化剂浓度和油水比对PCM SQ纳米球平均粒径和微观形态的影响.用FTIR、XPS、DLS、SEM 和 TGA 等对PCMSQ纳米球的结构、粒径、微观形态和耐热稳定性进行测定.结果表明,PCM SQ纳米球具有预期的结构和良好的耐热稳定性,且当w(AEO3/AEO9)为0.36% ~0.54%,NaOH浓度为25~50 mmol·L -1和油水比为1:10~1:12时,制得的PCM SQ平均粒径介于100~200 nm、大小均一,呈单分散性且球形度规整.%A sort of Polycarboxyl/methylsilsesquioxane(PCMSQ)nano-hybrid emulsions were prepared via hydrolytic condensation method of methyltriethoxysilane(M TES)and carboxy silane(CTES)which was first fabricated by γ-aminopropyltriethoxysilane(KH550) with maleic anhydride(MA),and sodium hydroxyl as the catalyst,primary alcobol ethoxy-late(AEO3/AEO9)as mixed emulsifiers.Effects of the emulsifier doses,the catalyst concen-tration and the oil/water ratio were discussed.Structure,particle size,micromorphology and thermal stability of PCMSQ nanospheres were investigated by FTIR,XPS,DLS,SEM and TGA.Results indicated that structure of the PCMSQ was consistent with the expectant out-come and thermal stability of the PCMSQ nanospheres was excellent.When w(AEO3/AEO9)is 0.36% ~0.54%,NaOH concentration is 25~50 mmol·L -1and oil/water ratio is 1:10~1:12,average particle sizes of the PCMSQ nanospheres were ranged of 100~200 nm.Mean-while these PCMSQ nanospheres with the uniform average diameter and monodisperse, which were regularly spheres.