共查询到20条相似文献,搜索用时 62 毫秒
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以硅酸钠为前驱体,制备得到硅溶胶,然后采用原位聚合法一步合成了聚硅酸/聚丙烯酰胺复合絮凝剂,通过红外光谱对合成产物的结构进行了表征。采用透光率、化学需氧量去除率对絮凝剂的絮凝效果进行了表征,并探讨了聚硅酸pH值、老化时间、聚合反应温度和时间等合成条件对絮凝效果的影响。结果表明,当硅酸钠浓度为0.5 mol/L、聚硅酸pH=5、老化时间为24 h、丙烯酰胺为5 g、引发剂用量为0.3 g,聚合反应温度为70 ℃、时间为90 min时,得到的聚硅酸/聚丙烯酰胺絮凝剂的絮凝效果最佳。 相似文献
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利用物理复合的方法制备聚丙烯酰胺(PAM)-聚硅酸锌(PSZ)复合絮凝剂。结果表明,聚丙烯酰胺-聚硅酸锌絮凝剂在复配比例为V (PAM): V (PSZ)=1.0、投加量为0.10 mL、模拟水样pH为8左右时,对高岭土模拟废水絮凝效果最好,脱色率达91.2%,均高于聚丙烯酰胺和聚硅酸锌单独使用的效果(最高脱色率分别达87.66%和89.78%);而且,在中性和碱性范围内,这种复合絮凝剂受pH影响较小。三种絮凝剂应用于四种工业废水的脱色处理结果表明,聚丙烯酰胺-聚硅酸锌复合絮凝剂的脱色率也均比单一絮凝剂要高。 相似文献
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研究了阳离子聚丙烯酰胺复合Ti~(4+)的絮凝性能,通过对絮凝性能进行评价,得出复合絮凝剂加入量对絮凝效果的影响以及对实际水样的絮凝效果。 相似文献
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以白油为连续相、丙烯酰胺为分散相、S—80为乳化剂、K_2S_2O_8—Na_2SO_3为催化剂合成了较稳定的聚丙烯酰胺反相乳液。聚合物分子量在200~400万,水解度可控。同时,对于搅拌剪切和乳化剂用量对乳液的影响也做了初步探索。 相似文献
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杨清华 《化工标准.计量.质量》2011,(12):26-26
聚丙烯酰胺具有良好的降滤失、絮凝、增稠以及降摩擦阻等特性,因此在钻井、采油、调剖、压裂等方面已经得到了广泛应用。本文简单的阐述了水溶液聚合制聚丙烯酰胺方法以及反相乳液聚合制聚丙烯酰胺的方法。 相似文献
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杨清华 《中国石油和化工标准与质量》2011,31(12):26
聚丙烯酰胺具有良好的降滤失、絮凝、增稠以及降摩擦阻等特性,因此在钻井、采油、调剖、压裂等方面已经得到了广泛应用。本文简单的阐述了水溶液聚合制聚丙烯酰胺方法以及反相乳液聚合制聚丙烯酰胺的方法。 相似文献
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通过电泳漆液转换,解决电泳涂装中的换色问题。经大量的技术准备和周密的实施过程,投产运行一年多,证明该换色技术是完全可行的。 相似文献
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:汽车涂装中的前处理和阴极电泳是涂装工艺中的两项重要工序,控制好其工艺参数的变化及严格现场管理,有利于提高漆膜的各项物化性能。举例说明并介绍了该厂的前处理和电泳涂装生产线的日常管理要点。 相似文献
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就电泳涂装的工艺特点进行简要介绍,并对这一工艺在内藏式油箱涂装上应用的可行性、技术经济性进行分析。此方法比较经济、可靠。 相似文献
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《国际聚合物材料杂志》2012,61(8):621-632
Organic coating using electrodeposition method has attracted substantial attention in the last few years. This method of coating provides many advantages, including surface smoothness, less environmental pollution, and good performance of protection against corrosion. In the current investigation, an electrodeposition method was used to coat a uniform layer of epoxy resin on phosphated stainless steel plate. Epoxy resin was converted to cationic tertiary type amine resin. This cationic epoxy resin, which contains ammonium group in the end of the polymer chain, was synthesized by ring-opening reaction of an epoxy resin with secondary amine in the presence of a proton donor. The so prepared cationic resin was dispersed in water, giving an emulsion containing charged polymer particles. A layer of resin was successfully electrodeposited on the phosphated stainless steel plate and physical properties of the layer were studied. A detailed study aiming to obtain reliable information of coating properties was carried out. The effect of a number of factors, including electrodeposition voltage, electrodeposition time, pH value of the emulsion, solvent content, resin Epoxy Equivalent Weight (E.E.W.) resin concentration, and bath temperature on deposition yield and coating adhesion was studied with a view to optimize these factors. Variables affecting the rupture voltage were also investigated. 相似文献
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采用化学气相沉积方法,在石墨基体上,在1623K,666Pa的条件下制备了SiC含量从0 ̄100wt%全范围变动的C-SiC复合涂层材料,X-射线衍射表明,当SiC含量代于34wt%时,SiC以(220)面择优取向,而当含量高于34wt%时,SiC以(111)面择优取向。本文还对复合涂层的密度及硬度等性能做了测试。 相似文献
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ELECTROPOLYMERIZATION OF 2-AMINO-4-PHENYLTHIAZOLE AND CHARACTERIZATION OF THE OBTAINED POLYMER FILMS
《国际聚合物材料杂志》2012,61(11):941-958
Electrochemical oxidative polymerization of 2-amino-4-phenylthiazole on platinum electrode in acid medium was carried out. Different reaction parameters were investigated such as current density, acid concentration, monomer concentration, and temperature with duration of time. The orders of the electropolymerization reaction were found to be 1.06, 1.10, 1.16 with respect to current density, acid concentration, and monomer concentration, respectively. The apparent activation energy (Ea) was found to be 61.04 kJ mol?1. The obtained polymer films were characterized by IR, UV, 1H-NMR, elemental analysis, thermogravimetric analysis, and cyclic voltammetry. The mechanism of the electrochemical polymerization reaction has been also discussed. Surface morphology of the obtained polymer film was characterized by X-ray diffraction and scanning electron microscopy. 相似文献
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混杂纤维浆状模塑(JMC)复合材料及其成型工艺 总被引:1,自引:0,他引:1
本文提出一种浆状模塑料的复合材料作成型工艺,以广泛适用开发和扩充新的增强材料广谱混杂使用,是一种环保,可持续发展而又易实现机械化的新工艺。 相似文献
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溶液配比及电参数对钛阴极微弧电沉积氧化铝涂层的影响 总被引:1,自引:0,他引:1
用阴极微弧电沉积在钛表面生成Al2O3涂层,探讨溶液组成、放电电压及时间对涂层形貌、相组成及生长速率的影响。结果表明:涂层由α—Al2O3和γ—Al2O3组成。随溶液中Al(NO3)3含量的增加。α—Al2O3含量和涂层生长速率均先增后减。电导率决定了Al(NO3)3的摩尔浓度为0.2mol/1时是较佳值。乙醇与水的体积比对溶液的起弧影响很大,过高的含水量因溶剂效应大而不利于阴极微弧电沉积。随电压升高,涂层的生长速率增加,α—Al2O3的含量增加。400V时,α-Al2O3含量可达76%。延长放电时间,涂层的生长速率亦先快后慢。120min时,涂层厚度可达100μm。 相似文献