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超重力反应结晶法纳米碳酸钙浆料及粉料的表面处理 总被引:3,自引:0,他引:3
研究了脂肪酸盐A、水溶性铁酸酯偶联剂B(B1)以及铁酸酯偶联剂C对新型超重力反应结晶法所得的纳米CaCO3浆料及粉料的湿法表面处理的配方与工艺,确定了A体系的最佳改性时间为30~40min、改性温度为40~50℃、改性剂用量(质量分数)为3%~5%;B(B1)体系搅拌强度必须很高,改性时间30~40min,改性温度80℃左右,改性剂用量(质量分数)3%~5%;C体系的最佳改性时间为30~40min,改性剂用量(质量分数)为3%~5%。同时,采用红外光谱对改性前后的纳米碳酸钙进行了表征,表明改性刑已连接至CaCO3表面。最后,用分散稳定模型简要分析了改性机理。 相似文献
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p-Methylphenylalkylsulfide of various alkyl chain length as extractant were synthesized and the extraction of palladium was examined in terms of equilibrium and kinetics. Distribution ratio of Pd was independent of alkyl chain length. For aqueous chloride media, there was a significant difference in distribution ratios for the solution of NaC1 and HC1. The results of loading test and the slope analysis suggest that the extractant and Pd (Ⅱ) form 2:1 complex. Furthermore, the extraction rate based on the volume of aqueous phase was obtained in a stirred vessel, and the rate equation was presented. Unfortunately, it was difficult to construct surfactant liquid membrane system by use of the present extractant. 相似文献
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p-Methylphenylalkylsulfide of various alkyl chain length as extractant were synthesized and the extraction of palladium was examined in terms of equilibrium and kinetics. Distribution ratio of Pd was independent of alkyl chain length. For aqueous chloride media, there was a significant difference in distribution ratios for the solution of NaCl and HCl. The results of loading test and the slope analysis suggest that the extractant and Pd (Ⅱ)form 2:1 complex. Furthermore, the extraction rate based on the volume of aqueous phase was obtained in a stirred vessel, and the rate equation was presented. Unfortunately, it was difficult to construct surfactant liquid membrane system by use of the present extractant. 相似文献
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PP/湿法表面处理纳米CaCO3复合材料的力学性能研究 总被引:7,自引:1,他引:7
研究了自制水溶性钛酸酯偶联剂对新型超重力反应结晶法所得纳米碳酸钙浆料进行湿法表面处理的配方和工艺。系统研究了纳米CaCO3用量和表面处理剂种类对:PPA纳米CaCO3复合材料形态结构和力学性能的影响。结果表明,采用偶联剂处理的纳米CaCO3在基体中的分散优于脂肪酸盐。纳米CaCO3经表面处理,在低含量时(5~6份)即可对PP进行有效地增韧改性,偶联剂和脂肪酸盐处理的两种纳米CaCO3分别使PP冲击强度提高70%和50%,且拉仲强度保持不变。DSC和WAXD研究复合材料中PP的晶体结构发现,PP β-晶型的成核结晶与表面处理剂种类密切相关。 相似文献
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聚烯烃纳米复合材料研究进展Ⅰ. 聚烯烃/粘土纳米复合材料 总被引:11,自引:0,他引:11
介绍了聚烯烃/粘土纳米复合材料的形成理论,结构与表征,性能与应用,并对近年来聚乙烯/粘土,聚丙烯/粘土纳米复合材料的研究进展进行了综述。 相似文献
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纳米CaCO3对聚丙烯的增韧增强作用 总被引:2,自引:0,他引:2
用自制的脂肪酸盐和分散剂对超重力反应结晶法纳米CaCO3浆料进行湿法表面处理,在其质量分数为5%~6%时即可对聚丙烯进行增韧改性.SEM观察发现,该复合材料断面粗糙,基体发生了屈服形变.结晶性能研究表明,纳米CaCO3的加入对聚丙烯具有明显的异相成核作用,使得球晶变小,改善了复合材料的韧性. 相似文献
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