缩聚型有机硅模塑料及专用树脂问世

针对国内目前有机硅树脂制备模塑料存在的问题,江苏省常州市嘉诺有机硅有限公司日前开发成功一种缩聚型有机硅模塑料及其专用有机硅树脂。缩聚型有机硅模塑料是由有机硅树脂、填料和添加剂通过捏合、混炼、加热软化、冷却压片过程制得。专用有机硅树脂是将有机硅基本单体和有机     

有机硅防水处理技术

概述了几种用于混凝土结构的有机硅防水剂如水性有机硅防水剂、溶剂型有机硅防水剂、有机改性有机硅防水剂等。介绍了有机硅防水剂的特点及防水处理方法。     

有机硅LED封装材料的最新研究进展

综述了近年来LED封装用有机硅材料(包括苯基有机硅、环己烷基有机硅、含氟有机硅、含环氧基有机硅)以及有机硅复合材料(有机硅/无机纳米粒子复合材料、有机硅/环氧树脂复合材料)的研究进展,并对有机硅LED封装材料未来的研究方向进行了展望。     

我国有机硅纺织印染助剂的现状及今后课题

简述了 3种类型的有机硅纺织印染助剂 :非活性聚二甲基硅氧烷、活性聚有机硅氧烷和带有机反应活性基团的聚有机硅氧烷。着重介绍了 3种进口有机硅织物整理剂 :亲水型有机硅织物整理剂、氨基硅油及其微乳液、有机硅抗菌防霉整理 ,并提出了有机硅纺织整理剂今后开发的重点     

东爵有机硅集团有限公司总工程师郭平：

大家知道，改革开放30年来，中国的有机硅工业取得了令全球同行业刮目相看的成就。具体表现为两个方面：一是有机硅工业助推了国内诸多行业的发展和进步；二是有机硅工业在国内很多行业中能够充分得到广阔应用。因此，人们从不了解有机硅，到今天大多数人知道有机硅、推广有机硅，进而灵活应用有机硅这一系列的变化，是我们有机硅从业人员共同努力的结果。     

江西有机硅厂有机硅生产技术取得新突破

今年以来，中国化工集团公司江西有机硅厂在提升有机硅生产技术上下功夫，大胆实践，有机硅生产技术再次取得新突破，有机硅二甲含量提升5个百分点，奠定了在中国有机硅行业的领先地位。     

LED封装用硅树脂的研究进展

综述了用于LED封装材料的有机硅改性环氧树脂类和有机硅树脂材料的研究进展,介绍了有机硅改性环氧树脂的物理共混和化学共聚方法,以及使用有机硅树脂为LED封装材料的特色优势,有机硅树脂产品的制造工艺特点和目前现状,并展望了有机硅封装材料的未来可能的研究方向。     

永修打造亚洲有机硅产业领跑方阵

<正>为发展壮大有机硅产业,永修县与江西星火有机硅厂政企合作,全力打造以有机硅为主导的特色工业制造基地。该县绘制了有机硅产业树,全力开展有机硅产业招商,今年已签约有机硅项目16个,总投资39.96亿元;目前,全县有机     

有机硅在纺织品拒水整理上的应用

报告了有机硅在提高纺织品拒水性能上的研究进展,总结了有机硅在降低表面能,提高粗糙度,提供反应位点等方面的应用状况。重点介绍了有机硅类拒水整理剂、有机硅作为改性剂提高聚丙烯酸酯类和聚氨酯类拒水剂的性能、有机硅改性纳米颗粒提高织物表面粗糙度、有机硅改善异种物质间的相容性制备拒水复合材料以及有机硅起交联作用这几个方面的研究现状。阐述了有机硅在拒水应用上的优点,为有机硅在纺织品拒水整理上的应用提供参考。     

专利信息 有机硅系列化合物

环保型有机硅树脂的制备方法,有机硅树脂组合物及有机硅树脂成型体,有机硅改性丙烯酸酯/无机纳米复合乳液及其制备方法,     

佛山市顺德新城区降水中污染物的监测和分析

为掌握佛山市顺德新城区降水中污染物的情况,2015年7月至8月,文章作者分别在雨天进行了降水取样,对降水中的pH、电导率、常见阴离子(F-、Cl~-、NO_3~(2-)、SO_4~(2-))及部分重金属(铅和镉)进行监测分析。选择有相关数据的珠江三角洲和石家庄、厦门等地的降水中污染物的情况进行对比。结果表明,顺德新城区降水中的p H和部分阴离子浓度优于珠江三角洲平均值,酸雨类型属于硫酸和硝酸混合型;其水体洁净程度略差于石家庄;铅和镉的浓度也高于厦门,甚至部分超出了人体能直接接触的安全范围。     

Metabolism of trideuterated iso-lignoceric acid in rats in Vivo and in human fibroblasts in culture

Saturated very long chain fatty acids (fatty acids with greater than 22 carbon atoms; VLCFA) accumulate in peroxisomal disorders, but there is little information on their turnover in patients. To determine the suitability of using stable isotope-labeled VLCFA in patients with these disorders, the metabolism of 22-methyl[23,23,23-²H₃]tricosanoic (iso-lignoceric) acid was studied in rats in vivo and in human skin fibroblasts in culture. The deuterated iso-VLCFA was degraded to the corresponding 16- and 18-carbon iso-fatty acids by rats in vivo and by normal human skin fibroblasts in culture, but there was little or no degradation in peroxisome-deficient (Zellweger’s syndrome) fibroblasts, indicating that its oxidation was peroxisomal. Neither the 14-, 20-, and 22-carbon iso-fatty acids nor the corresponding odd-chain metabolites could be detected. In the rat, the organ containing most of the iso-lignoceric acid, and its breakdown products, was the liver, whereas negligible amounts were detected in the brain, suggesting that little of the fatty acid crossed the blood-brain barrier. Our data indicate that VLCFA labeled with deuterium at the ω-position of the carbon chain are suitable derivatives for the in vivo investigation of patients with defects in peroxisomal β-oxidation because they are metabolized by the same pathways as the corresponding n-VLCFA. Moreover, as iso-VLCFA and their β-oxidation products are readily separated from the corresponding n-fatty acids by normal chromatographic procedures, the turnover of VLCFA can be more precisely measured. A preliminary report of part of this work (Reference 18) was presented at the 5th International Symposium on the Synthesis and Applications of Isotopes and Isotopically Labelled Compounds, Strasbourg, France, June 20–24, 1994.     

高效液相色谱法分析化妆品中微量成分的研究进展

综述了高效液相色谱法在化妆品中防腐剂、防晒剂中紫外线吸收剂以及性激素的检测等几个方面的应用;同时,介绍了分析所用的色谱柱、流动相、使用的检测手段以及样品的提取方法;最后针对目前存在的问题,提出了高效液相色谱用于化妆品中微量成分分析的研究方向和发展前景。     

Denitrification in shallow groundwater in a coastal agricultural area in Japan

In a coastal agricultural area in the central part of Japan (Shizuoka), we found decreasing nitrate concentration with depth in a shallow groundwater, where the depth to water table varied between 0.6 and 1.2 m below ground surface. High nitrate concentrations (5–29 mg N L^–1) were often observed in the upper layer (0–2 m) of the groundwater, but the concentration decreased to less than 1 mg N L^–1 in the deeper layer. Ammonium was scarcely detected, and the concentration of dissolved oxygen was usually low (< 1 mgO₂ L^–1) in the groundwater. Nitrate in the groundwater often had very heavy nitrogen stable isotope ratios (>20{}). There was a negative relationship between nitrogen stable isotope ratio of nitrate and its concentration. When nitrate was injected into the groundwater with acetylene and bromide (a conservative tracer), nitrate concentration decreased to 20% of the initial level within 5 days, accompanied by the increase in nitrite and nitrous oxide concentration and a little change in bromide concentration. These results indicate that microbial denitrification plays a potential role in the decrease of nitrate in shallow groundwater at the study site.     

我国硝酸工业生产技术新进展

系统叙述了我国硝酸工业2000-2007年生产现状及主要技术成果,尤其指出了国产"四合一"机组的成功投运,使我国硝酸国产化装置取得较大的进步,表现在吨酸的铂耗、氨耗和能耗等方面接近国外引进装置水平,同时介绍了国外双加压法硝酸生产技术的进展.我国已成为硝酸生产大国,仍需以先进的技术改造和发展我国硝酸工业,确保我国硝酸工业健康有序地发展,加快从硝酸生产大国向强国迈进的步伐.