碱式ZDDP抗氧化添加剂的合成

介绍了ＺＤＤＰ即碱式二异辛基二硫代磷酸锌的合成、性能及应用。结果表明，碱式二异辛基二硫代磷酸锌（碱式ＺＤＤＰ）具有优良的抗水解安定性能和抗氧化性能。     

液膜分离法清除废水中氨的实验室研究

通过缺锌、过量锌动物模型观察锌对大鼠呼吸道灌洗液中及血浆内皮素含量的影响。结果表明：（１）ＺＤ组大鼠支气管肺泡灌洗液中的ＥＴ、肿瘤坏死因子、一氧化氮和肺巨细胞杀菌力均低于自由喂养组。ＺＥ组的ＮＯ和ＢＡ也低于ＡＬ组。（２）ＺＤ组大鼠血浆ＥＴ、ＴＮＦ、ＮＯ均低于ＡＬ组。ＺＥ组血浆ＴＮＦ和ＮＯ也低于ＡＬ组提示缺锌可致支气管肺泡和血浆ＴＮＦ、ＮＯ减少，肺巨噬细胞杀菌活力减弱。     

二烷基二硫代磷酸锌盐中硫、磷、锌的测定

用湿法分解二烷基二硫代磷酸锌盐（ZDDP）样品，同时测定硫、磷、锌的含量。     

高能量密度材料TNAZ

ＴＮＡＺ具有能量密度高，热稳定性好，不吸潮等特性，感度与ＲＤＸ和ＨＭＸ相当，是一种有潜力的高能量密度材料。本文综述了ＴＮＡＺ的性能和国外研究进展。     

湿法炼锌中性浸出液中铜、镉的萃取分离无渣净化工艺

用ＡｃｏｒｇａＭ５６４０萃取剂对硫酸锌浸出液优先萃取分离铜．用二（２－乙基己基）二硫代磷酸（Ｄ２ＥＨＤＴＰＡ）和三辛胺（ＴＯＡ）协萃体系进行锌、镉分离．应用Ｄ２ＥＨＤＴＰＡ－甲苯体系时,镉完全萃取,但有机相中的镉很难反萃．应用Ｄ２ＥＨＤＴＰＡ－ＴＯＡ协萃体系时,镉能从硫酸锌溶液中选择性萃取,也能很容易地从有机相中反萃,实现镉与锌的分离．提出了从硫酸锌中性浸出液萃取分离铜、镉的无渣净化新工艺．     

二烷基二硫代磷酸锌在全钢载重子午线轮胎中的应用

研究二烷基二硫代磷酸锌在全钢载重子午线轮胎中的应用。结果表明,二烷基二硫代磷酸锌和偶联剂Si69并用对于提高全钢载重子午线轮胎胎面胶抗硫化返原性能和降低填料表面界面能均具有协同作用,有助于促进橡胶与填料的结合,硫化胶生热降低,并较好地平衡了抗焦烧性能和硫化特性。在相同用量下,添加二烷基二硫代磷酸锌的基部胶硫化特性和物理性能与添加促进剂DTDM和WK-7的基部胶相近,硫化胶生热降低,更环保,成本降低。     

烷基硫代磷酸锌硫化促进剂对天然橡胶老化性能影响研究

研究了烷基硫代磷酸锌和其他常用硫化促进剂对天然橡胶硫化胶的老化性能的影响.实验表明二异丙基二硫代磷酸锌能赋予天然橡胶硫化胶优良的耐热空气老化性能.     

二烷基二硫代磷酸锌生产工艺的改进

本文介绍了通过采用催化剂提高中间产物硫磷酸酯的收率，达到改进最终产品二烷基二硫代磷酸锌质量的方法。     

烷基硫代磷酸锌抗硫化返原的动力学研究

研究了二异丙基二硫代磷酸锌作为硫化促进剂在NR中抗硫化返原的硫化动力学原理.结果表明,该烷基硫代磷酸锌促进剂具有的抗硫化返原性的动力学内因,在于多硫键的后期变化过程中,二异丙基二硫代磷酸锌能够有效抑制多硫键变为改性链,从而使更多的多硫键转变为单、双硫键.     

○,○-二烷基硫代磷酰氯的制备——五硫化二磷法新工艺

O,O-二烷基二硫代磷酸(下简称烷基硫化物)及O,O-二烷基硫代磷酰氯、下简称烷基氯化物),是有机磷农药的重要中间体。新工艺采用催化法制备烷基硫化物,提高了产品     

氰尿酸钙/锌的制备及其在PVC制品中的应用

以氰尿酸、氢氧化钙和氧化锌为原料,去离子水为溶剂,分别合成了聚氯乙烯(PVC)用热稳定剂氰尿酸钙、氰尿酸锌。采用元素分析仪(EA)、傅里叶变换红外光谱仪(FTIR)、热失重分析仪(TG)以及扫描电镜(FESEM)对氰尿酸钙/锌进行了表征分析。通过烘箱热老化和刚果红测试考察了氰尿酸钙/锌对PVC制品热稳定性能的影响,并对热稳定机理进行了探究。结果表明,单独加入PVC质量1%的氰尿酸钙或氰尿酸锌,PVC制品的热稳定性要优于加入等量的硬脂酸钙或硬脂酸锌;氰尿酸钙/锌复配后表现出良好的协调作用,氰尿酸钙/锌最佳质量比为3∶1,热稳定时间达28 min,PVC试片在70 min完全锌烧;并且,环氧大豆油(ESBO)是一种非常适合氰尿酸钙/锌体系的辅助稳定剂,能够进一步提高PVC体系的热稳定性能。     

两种新型辅助热稳定剂的研究

采用静态热老化、脱氯化氢实验研究了自制的TS-5、TS-7辅助稳定剂在高锌钙比(质量比为1.25/0.25)的热稳定体系中的作用。结果表明:在180℃条件下,以TS-7作为辅助稳定剂制备的PVC试片具有良好的初期白度和较长的锌烧时间;TS-5和TS-7分别与季戊四(醇PER)复配能够综合改善所制PVC试片的热稳定性能,获得了良好的初期和中期(热老化20~30 min)白度和较长的锌烧时间(90 min)。改善了以PER辅助热稳定剂制备的PVC试片锌烧时间短(40 min),以D-山梨醇辅助热稳定剂制备的PVC试片白度不理想的缺点。     

Synthesis and characterization of water-soluble diazonium salts as contrast-enhancement materials

Water soluble aromatic diazonium double salts, p-diazodiphenylamine chloride zinc chloride (DZS-1) and p-diazoanisol chloride zinc chloride (DZS-2), have been evaluated as photobleachable dyes for contrast enhancement lithography. After testing the bleaching characteristics, aqueous solutions of DZS-1 and poly(vinyl alcohol) were used as a contrast enhancement material. Thermal stability, resist contrast, exposure parameters and other bleaching characteristics of the photobleachable membranes were investigated. A. commercial i-line photoresist was used to evaluate the contrast ratio of the DZS-1/PVA CEL layer. The contrast ratio obtained in this investigation is 1.67.     

Zinc compounds as flame retardants and smoke suppressants for rigid PVC

Abstract

The effect of the concentration of zinc hydroxy-stannate and zinc borate on the fire performance of rigid PVC formulations has been investigated. Fire testing was carried out using cone calorimetry as well as the limiting oxygen index (LOI) test. In addition, further testing was done to check that incorporation of the fire retardant additives did not have any detrimental effects on other properties of the formulated PVC, such as heat stability, colour or impact strength. The results demonstrated that zinc hydroxy-stannate is an excellent fire retardant and smoke suppressant at additions levels of 3 parts per hundred parts of PVC. Zinc borate did not have the excellent fire retardant properties of zinc hydroxy-stannate, but was found to be an efficient and cost-effective smoke suppressant, although the presence of free zinc oxide in the sample affected the thermal stability of the formulation.     

Synthesis and characterization of self-crosslinkable zinc polyacrylate latices at room temperature

The zinc ion self-crosslinkable polyacrylate latexes (PAs) cured at room temperature were synthesized by seeded semi-continuous emulsion polymerization with zinc oxide (ZnO) as crosslinker. The ZnO and methacrylic acid (MAA) mass contents, method of ZnO introduction in relation to the degree of crosslinking, and the properties of self-crosslinkable latices are examined and discussed. The characterization techniques such as Fourier transform infrared spectroscopy (FTIR), differential scanning calorimeter (DSC), transmission electron microscopy (TEM), and thermal gravimetric analysis (TGA) have been used to determine the structure and properties of PAs. The experimental results show that in a certain range, the average particle size decreases with an increase in the content of MAA, while the latex stability is undoubtedly improved. The optimum mass content of MAA is 12?% of the total monomers. The optimum amount of ZnO needed is 25?% (mole fraction) of MAA, and the optimum temperature of ZnO introduction is 60?°C. TEM analyses show that the latex particles are coarse spherical particles with surface enriched with comprising abundant carboxyl groups, and zinc ions are dissociated as zinc ammine complex in the aqueous phase. FTIR analyses confirm that the chelate crosslinking occurs between zinc ions and carboxylic acid during the film-forming process. The DSC results indicate that the glass transition temperature (T _g) of PAs increases as a function of the formation of a coordinate structure, and the obtained film exhibits excellent initial hardness and sandability. TGA analyses demonstrate that the introduction of ZnO evidently enhances the thermal stability of self-crosslinkable PAs.     

用色素取代硬脂酸锌抑制PVC蔬菜大棚膜初期着色性

讨论了ＰＶＣ蔬菜大棚膜生产中有关热稳定的物理学机理,评价了硬脂酸锌的热稳定作用。根据色度学原理设计了用色素取代硬脂酸锌,抑制了ＰＶＣ蔬菜大棚膜生产中初期着色的方案,批量试生产证明：该方法简便实用,能有效地防止“锌烧”。     

多元醇对聚氯乙烯热稳定作用的影响

采用静态热老化法、动态热老化法、刚果红变色法、红外光谱分析(FT-IR)、热失重分析(TGA)等现代仪器分析方法,评价了多元醇单独使用以及与硬脂酸锌(ZnSt2)复配使用时,对聚氯乙烯(PVC)的热稳定作用,并研究其协同作用机理。结果表明,多元醇单独使用时,能吸收聚氯乙烯受热分解产生的氯化氢(HCl),改善PVC的初期着色性,随着多元醇含量的增加,PVC热稳定时间延长。当硬脂酸锌与山梨糖醇复配含量为(0.7/0.4)份时,PVC的静态热稳定时间从15 min增加到21 min,热失重第一阶段试样残留量由44.97%增加到49.78%,表明山梨糖醇与ZnSt2复配能与降解产生的ZnCl2络合,缓解"锌烧"现象,改善了PVC的长期热稳定性。     

用盐桥支撑双分子层脂膜模拟研究锌离子跨细胞膜输运

采用盐桥支撑技术制备镶嵌胆固醇的双分子层卵磷脂(脑磷脂)膜,对膜配方、双分子层脂膜的稳定性、离子通透性、双层膜中胆固醇对离子通透性的影响等进行了研究,得到了最佳制膜工艺,并利用实验制备的双分子层脂膜模拟研究锌离子跨细胞膜的输运过程,建立了锌离子跨细胞膜的吸附．扩散模型,其计算值与实验值基本吻合。     

Zinc(II) Complexes of Amino Acids as New Active Ingredients for Anti-Acne Dermatological Preparations

Zinc compounds have a number of beneficial properties for the skin, including antimicrobial, sebostatic and demulcent activities. The aim of the study was to develop new anti-acne preparations containing zinc–amino acid complexes as active ingredients. Firstly, the cytotoxicity of the zinc complexes was evaluated against human skin fibroblasts (1BR.3.N cell line) and human epidermal keratinocyte cell lines, and their antimicrobial activity was determined against Cutibacterium acnes. Then, zinc complexes of glycine and histidine were selected to create original gel formulations. The stability (by measuring pH, density and viscosity), microbiological purity (referring to PN-EN ISO standards) and efficacy of the preservative system (according to Ph. Eur. 10 methodology) for the preparations were evaluated. Skin tolerance was determined in a group of 25 healthy volunteers by the patch test. The preparations containing zinc(II) complexes with glycine and histidine as active substances can be topically used in the treatment of acne skin due to their high antibacterial activity against C. acnes and low cytotoxicity for the skin cells. Dermatological recipes have been appropriately composed; no irritation or allergy was observed, and the preparations showed high microbiological purity and physicochemical stability.     

氰尿酸镧的协同作用及其复合稳定剂的研究

以氰尿酸、硝酸镧、氢氧化钠为原料合成了氰尿酸镧,通过刚果红试纸法研究了氰尿酸镧与硬脂酸钙、硬脂酸锌、季戊四醇、β-二酮对PVC热稳定性的协同作用;以协同作用为依据,合成了3组复合稳定剂,并且研究了这3组稳定剂的热稳定性、变色性。结果表明:氰尿酸镧与硬脂酸钙、硬脂酸锌、季戊四醇之间有明显的协同作用,但与β-二酮协同作用不明显;复合稳定剂a在热稳定性试验中比另外两组效果好,而复合稳定剂c在变色性方面比另外两组效果都好。