共查询到17条相似文献,搜索用时 93 毫秒
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将Gemini磺酸盐类表面活性剂与农药中常用的几种非离子型表面活性剂复配使用,成功研制出性能优良的20%虫酰肼悬浮剂、50%多菌灵悬浮剂及380g/L噁草酮悬浮剂。实验表明,使用Gemini磺酸盐类表面活性剂与非离子型表面活性剂复配后的产品乳化性能和稳定性得到很大的改善,协同效应明显,大大优于单独使用非离子型表面活性剂的产品。 相似文献
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20%虫酰肼悬浮剂的研究 总被引:1,自引:1,他引:0
20%虫酰肼悬浮剂(杀虫剂)的研制,实验室试验包括pH值、粘度、悬浮率、粒度、有效成份、稳定性及配方筛选。优惠配方如下(w/w):活性成份20%,润湿分散剂(A+B)10%,增调剂C0.4%-0.6%,防冻剂D5%,消注剂E1%和水。20%虫酰肼SC符合中国悬浮剂农药标准和需要。 相似文献
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叙述了采用反相高效液相色谱外标法,以甲醇-水作为流动相,用C18柱和紫外检测器(240nm),测定了20%虫酰肼悬浮剂的含量.结果表明:方法的标准偏差为:0.071;变异系数为:0.35%;平均回收率为:99.56%.线性相关系数为:0.9993. 相似文献
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采用湿式超微粉碎加工工艺,以悬浮率(≥90%)、筛析、热贮[(54±2)℃、14 d]稳定性为标准,通过对不同润湿分散剂、增稠剂、防冻剂、消泡剂的筛选.得到了20%虫酰肼·甲胺基阿维菌素苯甲酸盐悬浮剂的最佳制剂配方为虫酰肼19%,甲胺基阿维菌素苯甲酸盐1%,农乳500<'#>1%,宁乳34<'#>4%,NNO 0.9%,凸凹棒土1%,乙二醇5%,黄原胶0.1%,消泡剂0.2%,水补足至100‰.产品悬浮率≥90%,分散性良好,热贮稳定性合格. 相似文献
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通过对分散剂等助剂的筛选,确定了25%嘧菌酯悬浮剂的最佳配方,产品质量稳定,热贮(54℃±2℃)14d分解率小于5%,各项指标均达到悬浮剂标准。将国产的四种聚羧酸盐分散剂分别与进口助剂的性能进行了比较。研究结果表明,国产LG-3、GY-D1252和GY-D1256的分散性能良好,与进口助剂T36应用效果相当,制成的悬浮剂各项指标均达到标准,而国产RELAX-01助剂分散性能不理想。 相似文献
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Studies on Solution Behavior of Aqueous Mixtures of Nonionic Polymer in Presence of Cationic Surfactants
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The interactions of two gemini surfactants (16–s–16, s = 5, 6) and their conventional counterpart cetyltrimethylammonium bromide (CTAB) with polyethylene glycols (PEG 3000 and PEG 35000) have been investigated using conductivity, steady state fluorescence, viscosity and TEM techniques. The results indicate that there is no interaction between the PEG 3000/CTAB complex at lower polymer concentrations. However, a very weak interaction is observed at higher concentrations (0.5 and 1.0 wt% PEG 3000), while PEG 3000 and PEG 35000 interact with the gemini surfactants. Both critical aggregation concentration (CAC) and critical micelle concentration (CMC) increases with polymer concentration but are independent of the polymer molecular weight. From steady state fluorescence it is found that the addition of PEG results in no drastic decrease in the aggregation number (N) for all surfactants. This suggests that the atmosphere surrounding the polyion-bound micelles, with respect to the influence on the forces acting at the micelle surface, is equivalent to the counterion/water atmosphere surrounding free micelles. The relative viscosity (η r) results show an enhancement in η r for all the surfactants. The increase in η r is quite significant with gemini surfactants. Polymer-surfactant interaction also depends on the polymer molecular weight. Also, the interaction seems to affect both inter polymer–polymer association as well as chain expansion. Additionally the surfactant induced changes in the polymer conformation depicted by TEM study at the micro structural level confirmed previously observed interactions determined by different analytical techniques. 相似文献
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应用复配表面活性剂协同增效理论,对35%嘧菌酯悬浮剂的润湿分散剂进行筛选。结果表明:单十二烷基磷酸钾与NP-10间具有强烈的协同增效作用。使用单十二烷基磷酸钾与NP-10复配表面活性剂制备的35%嘧菌酯悬浮剂,热贮后在标准硬水中悬浮率达到96.5%,在3倍硬水中悬浮率达到90.1%,未出现析水分层现象,分解率仅为0.72%。较单一表面活性剂制备的35%嘧菌酯悬浮剂,产品性能有明显提高。复配表面活性剂的协同增效作用有利于提高35%嘧菌酯悬浮剂的稳定性。 相似文献
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介绍了陶瓷过滤机的工作原理,对陶瓷过滤机应用于磷精矿脱水中出现的产能不达标问题进行了分析并提出了改进措施。改进措施实施后,陶瓷过滤机产能逐步达到了设计值,为今后进一步提高其产能提供了可能的解决方法。 相似文献
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表面活性剂是分子中带有性质不同的亲水基和疏水基的两亲结构化合物,是与乳化、增溶、分散、润湿、起泡等界面现象有关的重要化学物质,是一种功能性精细化工产品。低聚表面活性剂是由联接基团通过化学键将两个或多个单体表面活性剂连接在一起,由此产生优异的表面活性等一系列的性质,从而得到了广泛的应用。本文介绍了其发展简史、研究进展及应用。 相似文献