脂肪醇对聚硅氧烷乳液稳定性的影响

以八甲基环四硅氧烷、N-β-氨乙基-γ-氨丙基二甲氧基基硅烷等为原料，在氢氧化钾催化作用下，通过开环共聚合成了聚硅氧烷乳液，并就稳定剂长链脂肪醇对乳液稳定性的影响进行了较详细的研究，得到了较佳的合成工艺。     

硅氧烷乳液聚合过程中大颗粒形成机理研究：Ⅰ.阳离子型乳液的耐电解质…

探讨了二甲基聚硅氧烷阳离子型乳液耐电解质稳定性的影响因素。结果表明，加入少量的非离子型表面活性剂与阳离子型乳化剂并用进行乳液聚合，可以保护乳液粒子，防止由于电解质引的乳液粒子的相互凝聚而形成大颗粒。     

反应性乳化剂对有机硅-丙烯酸酯乳液共聚合的影响

有机硅改性丙烯酸酯;乳液聚合;反应性乳化剂对有机硅-丙烯酸酯乳液共聚合的影响     

聚硅氧烷大单体与丙烯酸酯乳液共聚合

乳液聚合;交联程度;聚硅氧烷大单体与丙烯酸酯乳液共聚合     

反应性乳化剂存在下的五元苯丙乳液共聚合

采用反应性乳化剂SE-10N,通过正交实验及单因素实验确定了以苯乙烯、甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸和丙烯腈为单体的五元无皂苯丙共聚乳液的组成及聚合工艺。所制得的无皂乳液稳定,其乳胶粒大小均匀,粒径为50~60nm,比同组成的有皂乳液乳胶粒的粒径稍小。乳液涂膜透明、硬度达H级;其硬度、耐水性及钙离子稳定性均较同组成有皂乳液的好。     

乳化剂初始位置对乳状液稳定性的影响

用自建悬滴动态界面张力仪测定了相同Tween60浓度但溶解位置不同时的甲苯-水动态界面张力,发现Tween60先溶在甲苯中的甲苯-水界面张力下降过程比Tween60先溶在水时快的多,并且前者的界面张力比后者低得多;同时发现在相同浓度下Tween60先溶在甲苯中制备的乳状液比Tween60先溶在水时稳定的多,文章将这两种现象联系起来,从Tween60形成胶束能力、分子扩散系数、溶解性以及界面组成差异等角度对乳化剂初始位置效应作了深入探讨。     

乳化剂对丙烯酰胺反相乳液共聚合的影响

丙烯酰亚胺乙酯基三甲基氯化铵;乳化剂;乳化剂对丙烯酰胺反相乳液共聚合的影响     

硅氧烷乳液聚合过程中大颗粒形成机理的研究Ⅱ．聚硅氧烷乳液的耐酸碱稳定性

研究了阴离子型与阳离子型聚硅氧烷乳液的耐酸碱稳定性。发现阴离子型乳液对酸碱都相当稳定，在乳液制备过程中，酸性催化剂不会引起乳液颗粒的凝聚；而阳离子型乳液的耐酸碱稳定性较差，尤其是引起乳液颗粒慢速凝聚的碱浓度下限值很低，碱是制备阳离子型乳液的催化剂，碱引起乳液颗粒的慢速凝聚是阳离子型乳液中大颗粒形成的主要原因。在乳液聚合过程中所发生的相当部分的乳化剂从水相向有机硅相的转移也是影响阳离子型乳液稳定性的一个重要因素。     

乙烯基聚硅氧烷共聚反应竞聚率的测定及其对复合粒子形态的影响

用Ｆｉｍｅｍａｎ－Ｒｏｓｓ法处理数据，测定了乙烯基聚硅氧烷（ＳＶ）与苯乙烯（ＳＴ）、甲基丙烯酸甲酯（ＭＭＡ）和甲基丙烯酸正丁酯（ｎ－ＢＭＡ）的共聚反应的竞聚率，结果为ｒＳＴ＝１．４５和ｒＳＶ＝１．０８，ｒＭＭＡ＝０．７８和ｒＳＶ＝２．０１，ｒｎ－ＢＭＡ＝０．４６和ｒＳＶ＝３．４９．以含ＳＶ的乳液作为种子进行烯类单体的乳液聚合，单体和ＳＶ共聚反应对复合粒子的形态有很大影响。     

种子乳液聚合方法制备聚苯乙烯—聚硅氧烷核壳粒子

采用种子乳液聚合的方法，制备以聚苯乙烯为壳、聚有机硅氧烷为核的弹性粒子、探讨了加料和引发方式对粒子的结构及形貌的影响，并对苯乙烯种子乳液聚合的机理进行了切步的讨论。     

聚硅氧烷/甲基丙烯酸甲酯核壳结构复合粒子的制备

聚硅氧烷/甲基丙烯酸甲酯核壳结构复合粒子的制备;种子乳液聚合;核壳结构     

荧光探针法研究乳化剂对硅/丙核壳乳液聚合行为的影响

用荧光探针(芘)法测定了十二烷基硫酸钠(SDS)、烷基酚聚氧乙烯醚(OP-10),以及复配乳化剂的临界胶束浓度(CMC),并首次把荧光探针技术应用到硅/丙核壳乳液聚合反应的研究中.利用芘的I₁/I₃值,结合胶束微环境的极性变化规律和乳液聚合机理,探讨了乳化剂对聚合反应的影响.结果表明,荧光探针(芘)法可用于研究硅/丙乳液的聚合行为和确定乳化剂配比.通过粒径分析、透射电镜(TEM)对产品的结构进行了表征.     

乳化剂在双重乳液合成含胰岛素纳米胶囊中的作用

Insulin entrapped nanocapsules to use polylactide （PLA） as the encapsulating material were prepared through a modified water-in-oil-in-water （W/O/W） emulsification and solvent evaporation method, The average particle size of PLA nanocapsules obtained was decreased to （181.5 ± 8.4） nm, and capably adjusted from 180 to 370 nm by using different types and content of nonionic emulsifiers. The influence of emulsifiers on property of nanocapsules was discussed in detail. The effects of spans and tweens to modify the size of the nanocapsules were different, which can be due to the distribution of the surfactants on the inner interface between the inner water and oil of the double emulsion. The encapsulation efficiency and drug release of nanocapsules were affected obviously by the content and type of emulsifiers.     

Semicontinuous Emulsion Copolymerization of Vinyl Acetate and Butyl Acrylate Using Different Initiators and Different Chain Length Emulsifiers

The semicontinuous emulsion copolymerization of vinyl acetate and butyl acrylate (VAc/BuA) (85:15) initiated by thermal initiators ammonium persulfate (APS) and potassium persulfate (PPS) at 70°C in the presence of nonylphenol ethoxylates of varying chain lengths (NP-n) and acrylamide partially polymerized (Amol) was investigated. VAc-BuA copolymer latexes were synthesized as two different series in the glass reactor, in the first serie was initiated by APS and PPS was used as initiator in the second serie. The influence of the counterions or initiators and chain lenghts of non-ionic emulsifier on the properties of VAc-BuA copolymer latexes were determined by measuring Brookfield viscosities, weight average molecular weights (M̄_w), number average molecular weights (M̄_w), molecular weight distribution and surface tension of latexes to air. The results of copolymer latexes indicated that their physicochemical properties increased with the increasing chain length of nonionic emulsifier for two initiators.     

非离子乳化剂对淀粉接枝丙烯酰胺、丙烯酸反相乳液聚合反应的作用

接枝共聚;非离子乳化剂对淀粉接枝丙烯酰胺、丙烯酸反相乳液聚合反应的作用     

乳化剂对阳离子乳液聚合及乳胶粒性能的影响

以苯乙烯、丙烯酸丁酯为非离子单体,甲基丙烯酰氧乙基三甲基氯化铵（DMC）为阳离子单体,偶氮二异丁基脒盐酸盐（AIBA）为引发剂,十六烷基三甲基氯化铵（CTAC）和乙撑基双（十六烷基二甲基氯化铵）（G16—2—16）为乳化剂,采用半连续种子乳液聚合法进行阳离子乳液聚合。探讨了乳化剂的分子结构和用量对反应速率、单体转化率以及乳胶粒粒径、Zeta电位等的影响。结果表明：乳化剂的用量越大,反应速率越大,单体转化率越高,而乳胶粒粒径越小;使用G16—2—16作乳化剂时,单体转化率较高,乳胶粒粒径较大,Zeta电位较高。     

Template Polymerization-solvent Extraction：A New Method for Fabrication of Hollow Polysiloxane Particles

Hollow polysiloxane particles with diameters between 1.40 and 1.60 micrometres were fabricated by consecutive cocondensation of methyltrimethoxysilane and diphenyldimethoxysilane monomers onto polydiphenylsiloxane,subsequently removing the templated polydiphenylsiloxane by exposure to solvents.TEM and AFM measurement reveal that there are obvious hollow sphere structures for the polysiloxane microsphere particles.The hollow spheres are envisioned to have applications in areas ranging from dye-industry,catalysis,pharmaceutics to materials science.