共查询到19条相似文献,搜索用时 468 毫秒
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研究了天然植物的可溶性淀粉成分在洗发香波悬浮剂体系中的应用,结果表明:将天然植物的可溶性淀粉成分加入具硅油和珠光剂的洗发香波配方中,配方的泡沫性能不受影响,而稳定硅油的效果、增稠效果及去头屑性能大大提高.其中,0.8%天然植物可溶性淀粉成分和0.5%二氢化牛脂基邻苯二甲酸酰胺(TAB-2)的混合物对香波体系的各项性能和效果最好,因此是聚丙烯酸(Carbopol树脂)和肽白粉的最佳替代品. 相似文献
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本文讨论了一种新型酚醛片状模塑料的制备方法、增稠机理和制品性能。研究结果表明,当单独用氧化镁作增稠剂时增稠速度慢;当单独用氢氧化钙作增稠剂时增稠速度快,硅烷偶联剂能够催化酚醛片状模塑料的硬化和固化。同时还讨论了玻璃纤维含量和模压工艺对制品性能的影响。这些研究结果为生产优质的酚醛状模塑料提供了理论依据。 相似文献
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褐藻胶是一种亲水性天然高分子化合物,具有良好的增稠性、凝胶性和成膜性。本文介绍了褐藻胶在电池工业中作为碱性电池凝胶状锌阴极的凝胶剂、干电池隔离膜和去极化电解质、铅蓄电池的凝胶电介质和阴极板处理剂的使用原理和基本用法。 相似文献
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探讨了R6C电池正极配方和正极粉含水量对电池放电性能的影响,试验结果表明:正极配方中加入锰粉质量60%的EMD后,不论新电还是贮存电,其放电容量全部达到标准要求;试验结果还表明:43Ω,4h/d间放时间随EMD含量减少而递减,正极粉含水量在19%-20.5%间最适宜。 相似文献
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在相同的配方条件下,采用乳液聚合合成了St/BA/AN水性涂料乳液,考察了单体加料方式对乳液性能、乳胶粒子大小及分布、单体转化率的影响.结果表明:采用批量法和全滴加法不能制得性能优良的水性乳液,而半连续法制得的水性乳液性能优良,单体的转化率高达95%,涂膜效果好. 相似文献
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本文对免维护铅蓄电池用正负极配方中常用成分与搭配关系作了概述,认为目前沿袭普通蓄电池用配方致使其容量与寿命不能提高。作为负极应采用新的膨胀剂,改变硫酸钡、碳黑和有机物三者的应用比例关系,作为正极用添加剂宜少不宜多,应与其固化工艺作到良好配合。 相似文献
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介绍了有机复合酸在贵州习水发电厂3号锅炉清洗中的应用情况。该工艺采用羟基乙酸一柠檬酸复合有机酸清洗,双氧水钝化。清洗后除垢率达到了97.75%以上,腐蚀速度仅为1.1888g/m2.h,清洗效果良好。 相似文献
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The finite-element formulation of Poisson's equation has implicit natural boundary conditions that are not immediately obvious through introductory-course teaching methods. To prove the existence of these conditions, it is necessary to resort to more elaborate Galerkin techniques. In practice, to avoid going into the complex proofs of the Galerkin methods, introductory courses in numerical methods for electrical engineers gloss over the boundary conditions. The author presents a self-contained proof for the natural boundary conditions of the variational expression for elliptical field problems without recourse to the theory of weighted residuals. This allows educators to treat natural boundary conditions with greater rigor and thereby impart a better understanding of them in early courses in finite elements 相似文献
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在冶金企业中消耗无功功率比重最多的是感应电动机,约占60%以上,因此,研究如何提高冶金企业中电动机的自然功率因数,减少输送的无功负荷,降损节能,提高运行效率,很有必要。 相似文献
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This paper presents a new methodology for allocating transmission losses to the participants of a single energy market. The proposed approach is based on the incremental transmission loss concept and is implemented through two models: basic and extended. In the basic model, the total system losses are estimated through the linear DC load flow equations, while the extended model uses the exact AC formulation. The concept of center of losses is used; a fictitious bus in the system network where all transactions are compensated for transmission losses. Both models provide a sharing of transmission losses among generators and loads based on a predefined proportion, for instance 50%:50% for each participant class. Some important aspects related with the allocation fairness and transparency are illustrated by numerical applications with the IEEE Reliability Test System. The extension of this methodology to interconnected energy markets is treated in a companion paper. 相似文献
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This paper presents a new physical-flow-based mechanism for allocating the reactive power support requirements provided by the generators in multitransaction networks. The allocatable reactive support requirements are defined with respect to the support required for the network with no transactions in place. The requirements in the presence of the proposed transactions are formulated as the sum of two specific components-the voltage magnitude variation component and the voltage angle variation component. The formulation utilizes the multitransaction framework used for the allocation of losses. The formulation leads to a natural allocation as a function of the amount of each transaction. The physical interpretation of each allocation as a sensitivity of the reactive output of a generator is discussed. The extensive testing indicates that the allocation scheme approximates with good fidelity the actual net VAr outflow from each generator and is able to deal effectively with the nonlinearities due to the generator reactive power limits. The numerical results also indicate that the proposed scheme behaves in a physically reasonable and intuitive way 相似文献
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有机酸盐强化石灰石湿法烟气脱硫试验研究 总被引:6,自引:3,他引:3
在湍球塔设备中进行了有机酸盐强化石灰石湿法烟气脱硫的试验研究,对有机酸和有机酸盐强化石灰石湿法脱硫作了实验对比。结果显示,在脱硫系统中加入少量添加剂,既可以增加石灰石的溶解度,提高系统的脱硫率,也可以在较低的pH值下,防止结垢堵塞,增加系统运行的稳定性。己二酸钠和柠檬酸钠强化石灰石湿法烟气脱硫过程,可使系统脱硫率增加7%~9%,石灰石利用率提高近40%。根据实验结果,再考虑添加剂的市场价格,经过综合分析筛选,得出柠檬酸钠为性价比最好的添加剂。 相似文献
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