自交联型阳离子水性聚氨酯的合成与表征

合成了不同有机硅改性的阳离子聚氨酯乳液,不同结构的有机硅的加入改善了漆膜的耐水性、耐酸碱及耐有机溶剂的性能,改善了漆膜光泽和手感,提高了漆膜耐热性,改变了乳液的粒径,提高了乳液的稳定性,但是,不同有机硅对产物性能的影响不同.红外光谱分析表明,异氰酸酯已经完全反应,产物中存在氨基甲酸酯.     

IPDI聚酯型水性聚氨酯的合成研究

以聚酯二元醇OxyesterT1136、异氟尔酮二异氰酸酯 (IPDI)、二羟甲基丙酸 (DMPA)为原料 ,采用内乳化法合成了阴离子型水性聚氨酯皮革涂饰。研究了影响乳液及成膜物性能的各种因素。结果表明 ,此种聚酯型水性聚氨酯有优异的机械性能和耐黄变、耐有机溶剂和水     

超低添加量高耐擦洗内墙涂料用乳液的研制

研究了具有超低乳液添加量高耐擦洗性能的内墙乳液,分析了主要影响耐擦洗性能的因素,包括玻璃化转变温度、乳液粒径、乳化剂类型或用量以及功能单体使用量等因素对耐擦洗性能的影响;实验结果显示乳液粒径(直径)在160 nm、采用乳化剂A-102且体系中酸含量占单体总量在2.8%~3.8%时效果最优,在此基础上,使用高分散性能的单体ZP(具有双羧基的含CH2 CH2的不饱和有机物)参与共聚,达到非常优异的耐擦洗性能。     

丙烯酸/12硅溶胶复合比对复合涂膜性能的影响

以丙烯酸乳液、硅溶胶为基本原料，通过添加偶联剂、闪蚀抑制剂等制备出有机／无机复合涂料，结合复合基料的微观结构，探讨了丙烯酸／硅溶胶的复合比对复合涂料的耐温性、耐有机溶剂性、耐盐水性等性能的影响。结果表明：复合涂膜的耐盐水、耐有机试剂、耐热性能均比纯丙烯酸涂膜大幅度提高；丙烯酸／硅溶胶复合基料固化膜随着其中硅溶胶含量的增加，硅溶胶成分有在涂膜表面富集的倾向，[第一段]     

常温干防腐蚀涂料系用水性树脂

简述了水性丙烯酸乳液、水性醇酸乳液和水性双组分环氧树脂在水性防腐蚀涂料中的应用，并进行了耐湿热性能和耐盐雾性能的比较。     

高矿化度油气田固井水泥用环氧乳液的制备及性能评价

采用相反转法制备了适用于高矿化度条件下固井水泥的E-20水性环氧乳液,并评价了乳液的稳定性和在水泥体系中的性能。结果表明:该乳液耐矿化度稳定性好,加入到水泥浆体系中,水泥浆具有较适宜的凝结时间,能有效地提高水泥的耐腐蚀性能和抗压强度。与市售乳液相比,制备的E-20环氧乳液综合性能更为优良,适用于高矿化度油气田固井水泥体系。     

环氧/酚醛树脂乳液3240玻璃布层压板的研制

介绍环氧／酚醛树脂乳液制造3240玻璃布层压板的配方和工艺，试验表明，采用这种制造方法可节约大量昂贵的有机溶剂，降低成本，减少环境污染，有利于生产的安全保护，对利用乳液工艺和有机溶剂工艺制造的配比相同的3240层压板的性能测试表明，两种层压板性能相当，其物理力学性能及电性能均达到GB1303－77标准的要求。     

环氧树脂改性丙烯酸自动沉积涂料的研究

以改性环氧树脂、甲基丙烯酸、苯乙烯、分子量调节剂等单体为主要原料,聚合生成了环氧-丙烯酸酯乳液。将所得的乳液与炭浆、氢氟酸和抗氧化剂等以一定的比例配成稳定的且具有反应活性的汽车底漆,并对钢板进行了涂装,得到附着力达1级,铅笔硬度为3H,抗苯乙烯时间达24h以上甚至108h,耐盐雾时间达350h的漆膜,并就环氧树脂含量对新型乳液综合性能、新底漆漆膜的厚度、抗有机溶剂时间和耐盐雾时间的影响进行了讨论。     

苯丙乳液复配改性树脂对水性金属漆性能的影响

苯丙体系乳液和树脂作为水性涂料的成膜物质,具有优异的耐候性、低成本等诸多优点。本文考察了两种苯丙乳液与改性树脂配比对水性金属漆光泽度、水滴角、硬度、附着力、耐中性盐雾等性能的影响。结果表明:苯丙乳液RY-1与改性树脂复配后,涂层的耐中性盐雾腐蚀性提高21. 3%,而光泽度、硬度、附着力等其它性能均受到抑制;乳液RY-2与改性树脂的复配比为1∶3时,水性金属漆的综合性能最佳。     

铜与氯化苄部分季铵盐化的聚4-乙烯吡啶的络合物催化漆酚氧化聚合 Ⅰ.催化作用与漆膜性能

用氯化苄部分季铵盐化的聚4—乙烯基吡啶与铜的络合物代替漆酶，并将其水溶液与漆酚调合，配制了和原生漆相似的“油包水珠”型乳液，其漆膜在34℃普通烘箱中放置7．5小时达表干，4天后硬度为0．84，不仅保持了原生漆膜硬度大、耐水、耐盐、耐酸和耐有机溶剂等特点，而且其耐碱能力（40％NaOH）大大超过原生漆（1％NaOH），耐热性能也有所提高。     

废聚苯乙烯泡沫塑料接枝丙烯酸丁酯改性白乳胶的研制

通过对聚苯乙烯泡沫塑料进行乳化研究，获得了稳定的聚苯乙烯乳液。再采用丙烯酸丁酯（BA）和功能单体对聚苯乙烯进行接枝改性，制成水乳型胶粘剂。研究了溶剂比、乳化剂与稳定剂用量、改性单体及功能单体的用量、引发剂及交联剂用量等因素对粘接性能的影响。     

Preparation of spherical nanocomposites consisting of silica core and polyacrylate shell by emulsion polymerization

Nanocomposite particles consisting of silica (inorganic core) and polyacrylate (organic shell) were prepared in a form of emulsion by a new and simple method—the emulsion polymerization of acrylic monomers in the presence of silica sol. The key technique of the present emulsion polymerization, which made the formation of the nanocomposites successful, is the usage of nonionic surfactant above its cloud point. The morphology of the composite was investigated by DLS, AFM, and TEM, which clearly showed formation of the core‐shell‐type particles. A transparent film was prepared by casting the emulsion, which showed high resistibility against organic solvents. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 659–669, 2006     

氟代聚丙烯酸酯改性聚氨酯复合乳液的制备及其疏水性

为了提高聚氨酯-丙烯酸酯复合乳液的耐水性和耐溶剂性,将聚氨酯溶液作为反应介质,以丙烯酸十二氟庚酯(FA)和丙烯酸羟丙酯为单体,偶氮二异丁腈为引发剂,在溶液中进行聚丙烯酸酯自由基聚合,然后用N-甲基二乙醇胺进行亲水基扩链,通过溶液聚合相转化法制得新型阳离子氟代聚丙烯酸酯改性聚氨酯复合乳液。通过红外光谱、透射电镜、光电子能谱仪和接触角测定仪分别对复合乳液的结构、乳胶粒形态、膜表面的化学元素组成及疏水性进行了研究。结果表明,含氟链段成功接入了大分子链中,乳液形成稳定的核-壳结构,在膜材料表面形成了主要由含氟丙烯酸酯链段组成的界面,FA的引入可使复合乳液胶膜与水的接触角(PUA膜与水的接触角)由65°提高至98°。     

0.3%印楝素乳剂的开发研究

以印楝素原药(含量≥10%)为原料,制备0.3%印楝素乳剂。经溶剂、乳化剂、稳定剂等选择性试验,确定最佳配方和质量技术指标。     

5％高效氯氰菊酯水乳剂的研制

通过对一系列溶剂、乳化剂、助剂的筛选,配制了一种环境友好型农药制剂——5％高效氯氰菊酯水乳剂,确定了其最佳配方和制备方法,并对水乳剂的质量指标和性能进行了测试.结果表明:最佳配方下制备的产品质量稳定,各项指标均符合水乳剂的要求.     

易分散改性蒽醌的制备工艺研究

选用适宜溶剂将蒽醌溶解,再用转相法对油相进行乳化,制备O/W型蒽醌乳液,提高其在蒸煮液中的分散性。研究了溶剂种类、乳化剂配比、乳化温度及时间、转相温度等各种因素对乳液性能的影响。结果表明,最佳乳化条件为:苯乙酮为溶剂,Span和Tween系列复配乳化剂,转相温度90~95℃,乳化时间40~50 min。此条件下制备的蒽醌乳液分散均匀,平均粒径仅为0.26μm,贮存稳定性可达60 d以上。     

乳液型清蜡剂的研究及效果评价

本文结合油井结蜡的特点和清蜡剂的研究进展,综合考虑清蜡剂使用的安全性和环保性,通过有机溶剂和表面活性剂复配的方法,制备出毒性低、不易燃、密度较大、清蜡速率高的乳液型清蜡剂。     

Effect of solvent type on preparation of ethyl cellulose microparticles by solvent evaporation method with double emulsion system using focused beam reflectance measurement

The purpose of this study was to investigate the effect of solvent type on the solidification rate of ethyl cellulose (EC) microparticles and particle size/distribution of emulsion droplets/hardened microparticles during the solvent evaporation process using focused beam reflectance measurement (FBRM). EC microparticles were prepared with a water‐in‐oil‐in‐water solvent evaporation method using various solvents, including dichloromethane, dichloromethane–methanol (1:1), ethyl acetate and chloroform. The particle size/distribution of the emulsion droplets/hardened microparticles was monitored using FBRM. The morphology of EC microparticles was characterized using scanning electron microscopy (SEM). The transformation of the emulsion droplets into solid microparticles for all solvents occurred within the first 10–90 min. The square weighted mean chord length of EC microparticles prepared using chloroform was smallest, but the chord count was not the highest. The chord length distribution (CLD) measured by FBRM showed that a larger mean particle size gave longer CLD and a lower peak of particle number. SEM data revealed that the morphology of microparticles was influenced by the type of solvent. FBRM can be employed for online monitoring of the shift in the microparticle CLD and detect transformation of emulsion droplets into solid microparticles during the solvent evaporation process. The microparticle CLD and transformation process were strongly influenced by solvent type. © 2017 Society of Chemical Industry     

Electrochemical polymerization of pyrrole in supercritical carbon dioxide-in-water emulsion

Supercritical carbon dioxide is an environmentally benign solvent but its low polarity limits electrochemical reactions in it. We now report the electrochemical polymerization of pyrrole in a supercritical carbon dioxide-in-water (C/W) emulsion in the presence of a surfactant. Black polypyrrole films were formed on Pt electrodes, whose conductivity was comparable with non-oriented polypyrrole prepared in conventional solvents. The structure of the polypyrrole films was confirmed by IR and Raman spectroscopic measurements. p-Toluenesulfonic acid was a suitable supporting electrolyte among the electrolytes examined for the electrochemical polymerization in the C/W emulsion. A typical nodular morphology was observed on the basis of the SEM and AFM measurements. Confocal scanning microscope revealed the formation of a fine uneven texture on the film prepared in the C/W emulsion.     

亚微米级复合材料微粒合成研究

在乙醇-水混合溶剂中,用过硫酸钾(KPS)作为引发剂,通过乳液聚合作用来合成直径为375nm的聚苯乙烯(PSt)微球,并作为种子用于种子乳液聚合.用PEGm大分子单体作为稳定剂、偶氮二异丁腈作为引发剂,采用种子乳液聚合法,聚合苯乙烯和丙烯腈,制得特殊形态的亚微米尺寸的PEGm接枝共聚复合颗粒PEGm-g-PSAN.扫描电子显微镜(SEM)显示苯乙烯和丙烯腈同时促成了特殊形态.苯乙烯和丙烯腈的浓度、总单体浓度、引发剂类型和单体加入方式显著影响复合聚合物颗粒的形态.