二铁取代硅钨酸盐光解引发甲基橙的脱色

合成了SiW10Fe2的季胺盐(Fe2POM),并对其结构进行了表征.以Fe2POM为催化剂,研究了甲基橙的起始浓度、催化剂添加量、不同pH值等因素对光脱色速率的影响.利用异丙醇作为·OH捕获剂,探讨了甲基橙在Fe2POM-H2O2体系中的光化学脱色规律和机制.结果表明:体系在较宽的pH范围内具有高的光脱色活性,40—160mg/L初始质量浓度范围内,甲基橙的脱色速率随初始浓度降低而升高,脱色过程符合表观一级反应动力学规律.各体系的光脱色活性依次为:Fe2POM-H2O2单纯的Fe2POM>单纯的光照.     

氧化纤维素的制备研究

介绍了氧化纤维素 (DAC)的制备过程 ,用正交法探讨了以NaIO4 作氧化纤维素时反应温度、溶液pH值、氧化剂浓度、反应时间以及交互作用对DAC醛基含量的影响 ,找到了影响醛基含量的主要因素为反应温度、反应温度与NaIO4 的交互作用、反应温度与溶液 pH值的交互作用。初步确定了制备氧化纤维素的反应工艺 ,使醛基含量较高时的最佳反应条件为 :反应温度 3 5℃ ,反应时间 3h ,NaIO4 质量分数 6.78% ,pH值为 2时 ,醛基含量达 68.2 0 %。     

2,4-D/CMC接枝物纳米粒子的制备与缓释性能研究

以羧甲基纤维素钠（CMC）为基材，甲基丙烯酸甲酯（MMA）和二甲基二烯丙基氯化铵（DMDAAC）为改性单体，通过乳液聚合制备了CMC-g-P(MMA-DMDAAC)共聚物，采用自组装方法负载2,4-二氯苯氧乙酸（2,4-D）得到2,4-D/CMC-g-P(MMA-DMDAAC)纳米药物缓释体系。利用傅里叶红外光谱（FTIR）、差示扫描量热法（DSC）、热重分析（TGA）、扫描电镜（SEM）、粒度分析仪对其结构和形貌进行表征，并探究其载药性能和缓释性能。结果表明，2,4-D/CMC-g-P(MMA-DMDAAC)载药粒子呈笼状结构，粒度分布为160～425 nm；其载药率随着CMC∶MMA∶DMDAAC的摩尔比增大而提高，最高可达40.8%；其药物累计释放率随CMC∶MMA∶DMDAAC的摩尔比增大而降低，其释放行为符合Weibull模型，遵循Fick扩散机理。     

纤维素衍生物液晶相转变和织态结构

本文综述了纤维素衍生物液晶态相转变和织态结构。描述了纤维素衍生物从各向同性态向液晶态的转变过程和液晶态的织构特征。讨论了溶液浓度和温度对液晶相织构的影响。探讨了各种因素,如溶剂、取代基含量、外加力场和外加磁场等对液晶相的形成及织态结构的影响。     

药物中间体2-[(2′-氰基联苯-4-基)甲基氨基]-3-硝苯甲酸乙酯的制备

本文介绍了以3-硝基-2-叔丁氧甲酰氨基苯甲酸乙酯为原料，在碱性条件下与4-(2-氰基苯基)-1-溴甲苯发生亲核取代反应制备2-[(2′-氰基联苯-4-基)甲基氨基]-3-硝苯甲酸乙酯的方法，产品经核磁共振验证其结构，产品收率达83％。本合成工艺条件温和，适合工业化生产。     

Preparation of glycol derivatives of partially hydrogenated soybean oil fatty acids and their potential as lubricants

Glycol diesters and mixtures of mono- and diesters have been prepared from methyl esters of partially hydrogenated soybean oil fatty acids and diethylene, dipropylene, neopentyl and triethylene glycols. The catalyst used in these reactions was a mixture of calcium acetate/barium acetate (3∶1, w/w). The reactions were carried out under nitrogen with 0.5% catalyst at temperatures in the range of 190–275°C. Borated esters of mixed mono- and diesters were prepared with 0.33 equivalent of boric acid per 1.0 equivalent hydroxyl group on the ester. Refractive indices, viscosities, and flash and fire points were determined for diesters, mixed mono- and diesters, and mixed diesters and borated esters. The viscosities, flash points and fire points indicate that these esters can be used as a component of lubricating oils. Wear-prevention characteristics of mixed diesters and borated esters indicated that they can be used as antifriction additives in lubricating oils. Lecture presented at the joint meeting of the International Society for Fat Research and the American Oil Chemists' Society in Toronto, May 10, 1992.     

一步法合成5-甲基海因

以氰化钠、碳酸铵、乙醛等为原料，常压下一步反应得到５甲基海因，总收率７０２％。其最佳操作条件为：反应温度７５℃，反应时间３ｈ，原料碳酸铵与氰化钠之比为２∶１，酸化回流ｐＨ值为２，酸化回流时间２ｈ。     

Infrared study of salt free and salt treated cellulose pyrolysis under nitrogen atmosphere

The pyrolysis under nitrogen of salt free and salt treated cellulose was studied by infrared spectroscopy. The results confirm the unzipping mechanism suggested by DTA and TGA studies, and show this mechanism to apply to the untreated and salt treated samples. The results also show the unzipping to stop at the stage of char formation. The onset of this stage was found to occur after the volatilization of only 45–50% of the initial sample of the borax treated cellulose, compared with 65–70% of the KCl treated cellulose and 80–85% of the untreated cellulose.     

中国有机硅工业的发展空间

从中国的甲基氯硅烷建设热、金属硅对甲基氯硅烷生产的影响、下游产品的布局和发展、提高企业自主创新能力和知识产权保护意识、加强企业与．研究机构的合作、建立以企业为主体、产学研相结合的技术创新体系等几个侧面对中国有机硅工业的现状、存在问题及发展空间等进行了初步探讨。     

纤维素醚的特点、制备及在工业中的应用

综述了纤维素醚的种类、制备方法、性能和特点,以及纤维素醚在石油、建筑、造纸、纺织、医药、食品、光电材料及日化工业中的应用,介绍了一些具有发展前景的纤维素醚类衍生物的新品种并展望其应用前景。