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稳定性二氧化氯的制备与其稳定性的研究 总被引:8,自引:0,他引:8
稳定性二氧化氯是国际上公认的高效安全低毒消毒剂,有广泛的发展前景。本文主要研究了以亚氯酸钠为原料制备稳定性二氧化氯,探讨了加水量与稳定性二氧化氯浓度之间的关系,同时对稳定性二氧化氯的稳定性也进行了初步探讨,这对推广应用稳定性二氧化氯很有实用价值 相似文献
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基于线性理论的液体射流稳定性研究通常有两种方法:时间模式和空间模式;为了研究液体射流时间模式与空间模式稳定性的关系,基于线性稳定性分析方法,给出了超空化条件下液体射流稳定性色散方程以及对应于时间模式和空间模式的色散方程求解过程;在此基础上,对超空化条件下的液体射流时间模式稳定性与空间模式稳定性进行了对比研究,并对时间模式稳定性与空间模式稳定性差异的影响因素进行了分析。研究结果表明,对于一个给定参数下的射流而言,在研究扰动波在射流表面的主控模式、射流的最不稳定频率以及射流的破碎尺度时,空间模式稳定性研究结果与时间模式稳定性研究结果具有一定的等价性;而在研究射流的扰动振幅时,空间模式稳定性研究结果大于时间模式稳定性研究结果;液体射流周围气体的旋转和可压缩性以及射流的超空化都会对空间模式最大扰动增长率与时间模式最大扰动增长率间的差异产生影响。 相似文献
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以乙醇为溶剂从茶叶中提取脂溶性茶色素,研究了温度、pH值、金属离子、氧化剂、还原剂、暗处存放和自然光下存放对脂溶性茶色素稳定性的影响。结果表明:温度对脂溶性茶色素的稳定性影响不大;弱酸性条件(pH=4.8~6.6)下,脂溶性茶色素的稳定性较好;K+、Cu2+、Zn2+、Mg2+、Al3+对脂溶性茶色素的稳定性影响较小,Fe3+、sn2+对脂溶性茶色素的稳定性影响明显;氧化剂对脂溶性茶色素的稳定性有影响;还原剂对脂溶性茶色素的稳定性影响不大;暗处存放对脂溶性茶色素的稳定性影响不大;自然光下存放对脂溶性茶色素的稳定性影响很大。 相似文献
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利用TURBISCAN稳定性分析仪测得的TSI值监测了驱油剂对W/O乳状液稳定性的影响,实验结果表明,随着表面活性剂和聚合物浓度的增加,TSI值均降低,乳状液稳定性增加;随着碱浓度的增大,TSI值先降低后增大,体系稳定性先增强后变弱,当碱浓度为900mg/L时,乳状液稳定性最好。 相似文献
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Jeong Hee Kim Hye Jo Min Kun Park Jin Kim 《Korean Journal of Chemical Engineering》2017,34(8):2236-2240
Guar gum is an effective agent for use as a natural adhesive ingredient that can be used to replace the hazardous ingredients of spirit gum. This study describes the possibility of using guar gum as a renewable substituent for cosmetic adhesive. An adhesive base and cosmetic adhesive containing guar gum were prepared by a two-step process. The samples were tested for safety (cell toxicity test and patch test), stability (centrifugation, cycling and viscosity), and effectiveness (tensile strength). The results from the MTT assay show that the growth activity of human fibroblast skin cells was over 89% in all concentrations of cosmetic adhesive containing guar gum. In addition, no special skin reactions were reported in the patch test prepared adhesive containing guar gum. Moreover, the stability test demonstrated proper stability of all adhesive samples: the composition stability, heat stability, and viscosity of the adhesive samples maintained stable conditions. The efficacy test confirmed the superiority of the guar gum adhesive samples over spirit gum concerning the tensile strength. This study demonstrated that guar gum may be a viable replacement for synthetic rosins and also as a substituent in cosmetic. 相似文献
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在制备乳液胶黏剂时经常要将乳液增稠。本文从减小乳液胶黏剂的表面张力、提高乳液胶黏剂的稳定性、为不使胶黏剂渗入被粘材料、为使胶黏剂涂复的厚度达到一定的要求等四个方面分析了增稠在乳液胶黏剂分子设计中的作用,并对乳液胶黏剂的增稠方法,内增稠和外增稠作了详细的介绍。 相似文献
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V. Rayatskas 《The Journal of Adhesion》1977,9(1):51-61
The characteristics of evaluation of heat resistance of adhesive joints, i.e. the stability loss temperature (TT8) is suggested. Theoretical base of this characteristic is that heat resistance should be regarded as durability, in dependence with loading and temperature change law.
Stability loss temperature is determined according to the principle of thermomechanical testing. The investigations showed that there is a relationship between stability loss temperature, loading and the thickness of the adhesive layer. This relationship for adhesive joints of soft materials has a hyperbolic form.
If for adhesive joints the principle of superposition of destructions (Bailey criterion) exists, then, having durability equations, the stability loss temperature may be determined by calculation. 相似文献
Stability loss temperature is determined according to the principle of thermomechanical testing. The investigations showed that there is a relationship between stability loss temperature, loading and the thickness of the adhesive layer. This relationship for adhesive joints of soft materials has a hyperbolic form.
If for adhesive joints the principle of superposition of destructions (Bailey criterion) exists, then, having durability equations, the stability loss temperature may be determined by calculation. 相似文献
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聚硅氧烷-酚醛环氧共混胶粘剂耐高温性能的研究 总被引:1,自引:0,他引:1
利用UYA(差热法)考察了聚硅氧烷.酚醛环氧共混胶粘剂的耐高温性能,利用FT-IR分析方法研究了该胶粘剂的结构,并用环一块型摩擦磨损试验机评价了采用这种胶粘剂制备的粘接固体润滑膜的摩擦学性能。结果表明,聚硅氧烷一酚醛环氧共混胶粘剂具备较好的耐高温性能。 相似文献
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我国的生物质资源丰富,将其快速热解成生物油,作为优质化工原料应用,可实现其高值高效应用。本文对以生物油制备的环境友好型生物油淀粉胶黏剂基本性能进行研究,结果表明,其湿胶合强度可达到国标Ⅱ类胶合板标准,其黏度可以满足胶合板工业化生产需求;生物油淀粉胶黏剂流变行为呈现出明显的剪切变稀特征,是典型的假塑性流体,流动活化能△Eη为9.67 kJ·mol-1,表明其具有良好的流动性和应用潜力;通过对比不同生物油加入量的BOS胶黏剂湿胶合强度、流变性和热稳定性的研究发现,生物油的加入可改善BOS胶黏剂的耐水性,促进其固化,并增强其热稳定性。 相似文献