聚酰胺-胺星形聚醚原油破乳剂的合成与性能

以1.0G、2.0G、3.0G 乙二胺为核制备了星形大分子聚酰胺-胺,并与环氧丙烷、环氧乙烷进行烷氧基化反应制备了一系列具有多分支结构的二嵌段聚醚类破乳剂。采用浊点法测定了系列破乳剂的亲水亲油平衡值,单滴法测量了降低油水界面膜强度的能力,针对油包水型原油乳状液进行了破乳性能研究。结果表明:该系列聚醚破乳剂具有良好的界面活性,对油包水型原油乳状液脱水率超过90%,具有良好的破乳性能和适应性;破乳剂起始剂聚酰胺-胺代数越高,分支越多,所合成的聚醚破乳剂性能越好;随着聚酰胺-胺的代数及破乳剂质量浓度的增加,油滴液膜排液时间缩短,半生命期减小,破裂速率常数增大。     

宽域改性乳化沥青研究

对国内常见沥青的感温性能、力学性能进行研究，对目前常用沥青改性剂SBS、SBR、EVA、PE与沥青改性配伍性及效果进行了研究，通过试验筛选出了SS／SBR改性剂和乳化剂，确定了宽域改性乳化沥青的配方和生产工艺。检测结果显示，该宽域改性乳化沥青产品5℃延度大于150cm，软化点大于75℃，提高了改性乳化沥青的性能。实现了沥青性能在感温性方面的宽域。     

国内乳化蜡的研究及应用进展

介绍了乳化石蜡的类型及制备方法,讨论了乳化剂、乳化温度、乳化时间及搅拌速率对乳化蜡稳定性的影响;评述了乳化蜡在国内纺织工业、人造板工业、造纸工业、上光剂、农业及乳化炸药等行业的研究及应用进展;分析了国内乳化蜡的市场前景,指出中国发展乳化蜡的方向是实现产品的系列化和规模化。     

新型表面活性剂2-十四烷氧基丙酸钠的制备及性能研究

以丙烯酸和十四醇为主要原料 ,首先合成了 2氯丙酸乙酯 ,然后制得了 2十四烷氧基丙酸钠 ;并对它的一些物化性能进行了测定。实验表明 ,2十四烷氧基丙酸钠是一种很好的乳化剂 ,并具有很好的稳泡能力     

丙烯腈／酯酸乙烯酯单体的室温引发浓乳液聚合

研究了丙烯腈 /醋酸乙烯酯单体的室温引发自加热的浓乳液聚合方法。探讨了聚合过程中主要参数对转化率和分子量的影响。最终得出 ,浓乳液聚合方法是实现室温引发、自加热聚合的首选方法。     

Dehydrogenation of 11α‐hydroxy‐16α, 17‐epoxyprogesterone by encapsulated Arthrobacter simplex cells in an aqueous/organic solvent two‐liquid‐phase system

BACKGROUND: Arthrobacter simplex cells immobilised in sodium cellulose sulfate/poly‐dimethyl‐diallyl‐ammonium chloride microcapsules were used for the microbial dehydrogenation of 11α‐hydroxy‐16α,17‐epoxyprogesterone to 11α‐hydroxy‐16α,17α‐epoxypregn‐1,4‐diene‐3,20‐dione in an aqueous/organic solvent two‐liquid‐phase system, which is a key reaction in the production of glucocorticoid pharmaceuticals. The aim of the study was to establish a suitable aqueous/organic solvent two‐liquid‐phase system for performing semi‐continuous production in an airlift loop reactor by encapsulated A. simplex cells with the addition of suitable surfactants to achieve a higher yield of the product. RESULTS: n‐Hexane was selected as the most suitable organic solvent. In optimised Tween‐80 emulsion feed mode the conversion in the airlift loop reactor was as high as 97.54% when the time of reaction was 2 h, and the reaction time was greatly shortened. In semi‐continuous production the cultivation with immobilised cells was carried out for five batches in total. The conversion in each batch was above 95% and the enzymatic activity still remained quite high after five batches of biotransformation. CONCLUSION: The results showed that performing the conversion by this method shortened the reaction time and increased the productivity, thus demonstrating the great potential of the method for the dehydrogenation of 11α‐hydroxy‐16α,17‐epoxyprogesterone. Copyright © 2008 Society of Chemical Industry     

微波技术制备吸水性无纺布

讨论了微波加热的基本原理及影响因素，研究了微波法制备缠绕着丙烯酸交联物的吸水性无纺布的生产工艺，讨论了AA浓度，引发剂用量，辐射时间，交联剂用量诸因素对无纺布相对吸水率的影响。通过正交实验得出最佳工艺条件及配方：微波功率485W，微波辐射时间30S，AA浓度35％，引发剂与单体摩尔比为0．05，交联剂用量为0．3％，与常规法相比，微波加热法优于常规加热法。     

阳离子聚合物乳液制备方法

综述了阳离子聚合物乳液制备方法 ,着重总结了近年来在无皂阳离子乳液聚合方面的研究成果     

多孔性共聚物粒子乳液的制备

首先合成了苯乙烯（Ｓｔ）－甲基丙烯酸甲酯（ＭＭＡ）共聚物种子乳液，然后进行Ｓｔ．ＭＭＡ和甲基丙烯酸（ＭＡＡ）的无皂种子乳液聚合，制得Ｐ（Ｓｔ－ＭＭＡ－ＭＡＡ）乳液，将该乳液在９０℃下依次用碱和酸处理３ｈ经透射电子显微镜表征，证实所得共聚物乳胶粒具有多孔结构。