共查询到19条相似文献,搜索用时 109 毫秒
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对异构十三醇聚氧乙烯醚上的环氧乙烷数(EO数)及用3个环氧丙烷数(3PO数)对其封端后的构效关系进行了对比性研究。对不同的异构十三醇聚氧乙烯醚及3PO封端的异构十三醇聚氧乙烯聚氧丙烯醚的表面张力、临界胶束浓度、润湿性质、泡沫性质、乳化力及浊点进行了测试,发现随着EO数的增加异构十三醇聚氧乙烯醚的最低表面张力(γcmc)、临界胶束浓度(cmc)、稳泡力、起泡力、润湿时间及浊点均增大。PO封端后,相较于封端前,其表面张力增大;临界胶束浓度、稳泡力、起泡力、乳化力及浊点均降低;EO数大于9时,封端后的润湿力相较于封端之前有所提高。最终结果表明聚醚的不同结构对其性能有不同的影响。 相似文献
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平均聚合度对十二烷基多苷性能的影响 总被引:3,自引:0,他引:3
研究了平均聚合度对十二烷基多苷的表面张力、起泡性能、增溶性能和分散性能的影响。得出的结论是:随着平均聚合度的增加,十二烷基多苷的表面张力变化不明显;分散性能先增加后下降;而起泡性能、增溶性能则相应减小。 相似文献
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十二烷基醇聚氧乙烯醚羧酸钠及其复配体系的泡沫性能 总被引:1,自引:0,他引:1
采用气流法研究了十二烷基醇聚氧乙烯醚羧酸钠(C12E3C)水溶液的泡沫性能,并考察了不同添加剂(氯化钠、聚合物、脂肪醇、烷醇酰胺)对泡沫性能的影响.结果表明,电解质的加入显著降低了泡沫的稳定性,泡沫半衰期从85 min降低至45 min,而起泡能力随电解质浓度的增加先增强后减弱;聚合物的加入降低了起泡能力,但明显增加泡沫稳定性;短链醇的加入可以明显提高溶液的起泡能力及泡沫稳定性,泡沫体积从218 mL最高可增至240 mL,泡沫半衰期从85 min最高可增至108 min;而不同链长的长链醇对泡沫性能影响效果不同;烷醇酰胺的加入则可以增加泡沫稳定性,但对起泡能力影响不大. 相似文献
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对自制的绿色表面活性剂N-十二烷基-N-甲基葡萄糖酰胺(MEGA-12)进行了物化性能以及初级生物降解性能的测试,结果表明其cmc为141.26 nlg/L,γcmc为27.52 mN/m;润湿力、乳化力与起泡稳泡性能均比同条件下烷基多苷(APG12/14)的表现优良;去污力与APG12/14相当;初级生物降解性在8 d内即可达到98.4%.研究了十二烷基硫酸钠(SDS)与MEGA-12在水溶液中的相互作用,实验发现SDS可以使MEGA-12的Krafft点降低,并改善其溶解性和溶液稳定性,但对其表面张力及cmc影响不大. 相似文献
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以淀粉和十二醇为原料采用一步法合成淀粉十二烷基苷表面活性剂.考察了反应时间、反应温度、催化剂和溶剂等因素对合成淀粉十二烷基苷的影响,并对淀粉十二烷基苷的产率、表面张力、泡沫性能和乳化性能等作了相应的分析检测.最优的合成工艺为:固定淀粉为40g、十二醇为41.3g、液体石蜡为20g、催化剂0.1g、反应时间6h、反应温度113℃,合成的淀粉烷基苷的表面活性为24.78Nn/m,产率为93.01%.外观为淡黄色. 相似文献
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影响十二烷基多糖苷的合成因素研究 总被引:3,自引:0,他引:3
采用交换法合成十二烷基葡萄糖苷,考察了催化剂、醇糖比、反应时间、反应温度及脱醇工艺等对反应结果的影响。结果表明,优惠工艺条件是:反应温度为110℃左右催化剂/葡萄糖摩尔比为0 01∶1、正丁醇/葡萄糖摩尔比为5∶1、十二醇/葡萄糖摩尔比为6∶1的条件下反应,经柱层析去除残留正十二醇,十二烷基多糖甙收率为85 5%,并测定了产品的表面张力和起泡性能。 相似文献
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新型商业洗衣用表面活性剂TERGITOL(?)^LA系列(LA-7和LA-9)是以植物来源的脂肪醇为起始剂,经烷氧基化反应制得的环保型非离子表活产品。文章研究了这两个产品的泡沫、润湿、乳化、凝胶范围和倾点等性能,并与传统商洗用脂肪醇聚氧乙烯醚(AEO-9)进行对比。结果显示,TERGITOL(?)^LA系列具有显著的快速破泡性能,较低的动态表面张力和优良乳化性能。相比AEO-9,LA系列倾点更低且无凝胶范围。因此,TERGITOL?LA-7和LA-9具有应用于商业洗衣产品的潜力。 相似文献
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Sulfosuccination of Methyl Ricinoleate and Methyl 12-Hydroxy Stearate Derived from Renewable Castor Oil and Evaluation of Their Surface Properties 下载免费PDF全文
Pandari Phani Kumar Peketi Ramesh Sanjit Kanjilal 《Journal of surfactants and detergents》2016,19(3):447-454
Sulfosuccination of castor oil-derived methyl ricinoleate and methyl 12-hydroxy stearate have been carried out in the present work. Synthesis involves malenization of secondary alcohol of methyl ricinoleate/methyl 12-hydroxy stearate followed by sulfonation of maleic monoester to generate double-headed dianionic surfactant with carboxylate and sulfosuccinate functionalities in the head group region. Various reaction conditions were optimized for maximum production of these two sulfosuccinates. Both compounds were evaluated for surface and detergency properties. The surface tension study indicated that the critical micelle concentration of sulfosuccinated methyl ricinoleate and methyl 12-hydroxy stearate is 0.26 and 0.11 mM, respectively. The detergency property of these two surfactants indicated that they were excellent in wetting time emulsification and Ca-tolerance. However, these two surfactants exhibited very poor foam height and foam stability. 相似文献
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Abd El Menam Eissa Manal El Hefnawy Samy Bader Mohamed Radwan Mohamed Deef Allah 《Journal of surfactants and detergents》2012,15(4):411-418
A novel series of three anionic polymeric surfactants was prepared by polymerization of sulfonated styrene and allyl esters of long chain fatty acid chlorides (decanoyl, lauroyl and palmitoyl chloride). The unique structural features of these surfactants were confirmed by different spectroscopic tools (IR and H-NMR). The surface properties of these compounds such as surface tension, interfacial tension, emulsion stability, wetting power, foam height, solubilization and dispersant properties in disperse dye systems were determined and evaluated. A comparative study was done between the chemical structures and surface properties of these compounds. Biodegradability and stability to hydrolysis in acidic and alkaline medium were also determined and evaluated. 相似文献
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松香基双羧酸盐双子表面活性剂的合成及性能 总被引:1,自引:0,他引:1
以脱氢枞胺及乙二胺四乙酸酐为原料简便合成了新型松香基双羧酸盐双子表面活性剂Na-DDEDTA,采用IR、 1H NMR 、 13C NMR 等光谱对其结构进行了确证,研究了其表面活性性能。Na-DDEDTA表面活性剂比常规表面活性剂Na-DMA具有较低的临界胶束浓度及表面张力,其临界胶束浓度CCMC及对应的表面张力分别为0.11 mmol/L及33.6 mN/m。两种表面活性剂的乳化性能相当,Na-DDEDTA泡沫性能比Na-DMA稍差,Na-DDEDTA亲水性更弱。松香基双子表面活性剂是一种良好的绿色化学品。 相似文献
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The properties of Alpha Olefin Sulphonate (AOS) and Alkyl polyglucosides (APG) were studied in the presence and absence of
nonionic polymers such as polyethylene glycol, poly vinyl pyrrolidone and methyl cellulose and hydroxy propyl cellulose. Properties
like surface tension, foaming, viscosity and emulsification were studied at a constant concentration of polymer (0.1%) and
varying concentrations of surfactant. It was found that at low surfactant concentrations there is an association between surfactant
and polymer at the liquid/air surface in the case of an anionic surfactant and a nonionic polymer, which is not seen in the
case of nonionic surfactants and nonionic polymers. A nonionic polymer reduces the surface tension of AOS by forming a surfactant-polymer
complex which in turn increases the foamability, emulsifying property and viscosity of solution. APG does not show any effect
on its surface tension in the presence of nonionic polymers but its foamability and emulsifying properties are improved. Reduction
in surface tension is not the only reason behind increased foamability in the presence of the polymer. Higher molecular weight
polymers give a rich, creamy foam because of increased viscosity in the surfactant solution as compared to lower molecular
weight polymers. 相似文献