超重力反应结晶法纳米碳酸钙浆料及粉料的表面处理

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。     

水性氯化物介质中对甲基苯烷基硫醚萃取钯的研究

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.     

锍阳离子液体在染料敏化太阳电池中应用

S144TFSI与S221I离子液体是一种新型的室温离子液体,其高沸点,不易挥发等优点使其能应用于染料敏化太阳电池中.测定了不同膜厚的TiO2光电极.不同体积比的S144TFSI与S221I组成的电解质体系以及添加剂TBP与LiI的加入对太阳电池性能的影响.实验表明.制取10 um左右厚度的TiO2电极.选取S144TFSI与S221I体积比为1:1的电解质,加入0.5 mol/L的TBP,0.2 mol/L的Lil能提高电池性能.     

锂离子电池用二氧化锡负极材料的研究进展

由于二氧化锡(SnO_2)具有价格低、理论比容量高和能量密度高等优点,其作为锂离子电池负极材料被广泛研究。概述了SnO_2基负极材料的储锂机理、发展现状及存在的问题。着重介绍了纳米化、与碳复合手段对改善SnO_2基负极材料电化学性能的作用,并对SnO_2基负极材料发展过程中遇到的挑战提出了建议和展望。     

水性氯化物介质中对甲基苯烷基硫醚萃取钯的研究

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.     

γ-甲基丙烯酰氧丙基甲基二甲氧基硅烷改性丙烯酸酯乳液的合成及性能研究

通过γ-甲基丙烯酰氧丙基甲基二甲氧基硅烷(KH571)与丙烯酸酯类单体进行聚合反应,采用水解抑制法合成出有机硅改性丙烯酸酯乳液。研究了聚合工艺、软硬单体配比、乳化剂用量和比例,以及有机硅单体、引发剂和水解抑制剂用量等因素对硅丙乳液聚合过程稳定性及产品性能的影响,找出了合成硅丙乳液的最佳工艺参数。同时利用红外光谱对共聚物结构特征进行了分析。     

PP／湿法表面处理纳米CaCO3复合材料的力学性能研究

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。     

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

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。     

纳米CaCO3对聚丙烯的增韧增强作用

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.