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首次采用超声与微波辅助合成方法制得数种高比表面积吸附纤维和树脂新材料。研究表明,1)分别以4,4’-二氯甲基-联苯(CMDP)、1,4-二氯甲基苯(XDC)以及FeCl3为单体和催化剂,采用超声辅助Fridel-Crafts烷基化自聚合反应制得比表面积可达1320m2/g的超高交联多孔吸附树脂新材料;2)以PP-ST-DVB基纤维为基体,分别采用超声或超声-微波辅助Fridel-Crafts后交联反应制得比表面积可达84.25m2/g和83.96m2/g的超高交联吸附纤维新材料。与现有多孔高分子骨架制备方法相比,这种多孔聚合物合成新技术可有效克服液固相接枝聚合反应中受热不均所带来的种种弊病,且具有促进溶解(溶胀)和反应时间大幅缩短的优点。 相似文献
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由大孔氯甲基化聚苯乙烯合成了含有悬挂醚键的甲氧基修饰的大孔交联树脂.通过化学分析(氯含量的测定)、红外光谱和元素分析等手段,确证甲氧基负载在聚苯乙烯骨架上,负载量为4.10mmol/g.测定了这种树脂对正己烷中苯酚的吸附等温线,表明其对正己烷中苯酚的吸附是放热的,随着温度的升高,吸附量逐渐降低,且吸附等温线可拟合成直线.通过吸附焓的计算、不同条件下吸附等温线的比较以及理论计算等方法,确证氢键是甲氧基修饰的大孔交联树脂吸附正己烷中苯酚的主要驱动力,树脂骨架上负载的醚氧原子与苯酚的酚羟基氢原子形成了强烈氢键. 相似文献
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通过Friedel-Crafts后交联及化学修饰反应,合成了乙酰苯胺基修饰的超高交联吸附树脂ZH-05,通过红外光谱(IR)和比表面及孔径分析(BET)对其结构进行表征.以Amberlite XAD-4树脂作为参照,通过等温吸附实验和吸附动力学实验探讨了ZH-05树脂对水溶液中苯酚和对氯苯酚的吸附性能和机理.结果表明,与XAD-4树脂相比,ZH-05树脂对苯酚和对氯苯酚均具有更佳的吸附性能.Langmuir和Freundlich方程均能较好拟合ZH-05树脂对苯酚和对氯苯酚的吸附等温线.ZH-05树脂对苯酚和对氯苯酚的吸附以焓推动的自发物理吸附过程为主,吸附过程放热;吸附符合准一级动力学吸附方程,颗粒内扩散是吸附过程的主要控制步骤. 相似文献
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Dr. Zhenjie Zhang Ha Thi Hoang Nguyen Prof. Dr. Stephen A. Miller Prof. Dr. Seth M. Cohen 《Angewandte Chemie (International ed. in English)》2015,54(21):6152-6157
Preparation of porous materials from one‐dimensional polymers is challenging because the packing of polymer chains results in a dense, non‐porous arrangement. Herein, we demonstrate the remarkable adaptation of an amorphous, linear, non‐porous, flexible organic polymer into a three‐dimensional, highly porous, crystalline solid, as the organic component of a metal–organic framework (MOF). A polymer with aromatic dicarboxylic acids in the backbone functioned as a polymer ligand upon annealing with ZnII, generating a polymer–metal–organic framework (polyMOF). These materials break the dogma that MOFs must be prepared from small, rigid ligands. Similarly, polyMOFs contradict conventional polymer chemistry by demonstrating that linear and amorphous polymers can be readily coaxed into a highly crystalline, porous, three‐dimensional structure by coordination chemistry. 相似文献
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聚合物孔材料的制备和应用研究已经成为聚合物科学和材料科学热点,制备聚合物孔材料的方法发展很快。本文综述了聚合物孔材料的制备方法,包括胶体晶模版法、水模版法、超临界二氧化碳发泡法、自组装法等。其中本课题组首次提出的无模版自组装法操作简单、无需模版、环境友好,具有广阔的发展前景。 相似文献
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Facile Construction of Structurally Defined Porous Membranes from Supramolecular Hexakistriphenylamine Metallacycles through Electropolymerization 下载免费PDF全文
Dr. Xing‐Dong Xu Dr. Chang‐Jiang Yao Li‐Jun Chen Guang‐Qiang Yin Prof. Yu‐Wu Zhong Prof. Hai‐Bo Yang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(15):5211-5218
The construction of well‐controlled porous materials is very challenging. Herein, we report the successful preparation of structurally defined porous membranes based on hexakistriphenylamine metallacycles through electropolymerization. The newly designed porous materials were characterized by the typical cyclic voltammograms, XPS, SEM, and TEM investigations. Further investigations revealed that the metallacycle‐based polymer films displayed a good size‐selective molecular‐sieving behavior. 相似文献
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Y. Ohtsu H. Fukui T. Kanda K. Nakamura M. Nakano O. Nakata Y. Fujiyama 《Chromatographia》1987,24(1):380-384
Summary Silicone polymer-coated silica gels modified with octadecyl and octyl groups (S/S-C18, S/S-C8), or “capsule-type silica gels” were developed as packing materials for reversed-phase liquid chromatography. They were obtained
by coating the surface of totally porous silica gel with a homogeneous silicone polymer film, and thereafter modifying the
coating polymer with octadecyl or octyl groups. Retaining the advantages of silica-based packings, they show strong resistance
of alkali-like organic porous polymeric materials. 相似文献
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反相浓乳液方法制备聚苯乙烯/二乙烯基苯结构型泡孔聚合物 总被引:4,自引:0,他引:4
通过反相浓乳液聚合方法制备了系列聚苯乙烯/二乙烯基苯(PS/DVB)泡孔聚合物.水作为分散相,其分散相体积分数可达90%;苯乙烯单体作为连续相,聚合后构成PS/DVB泡孔聚合物的结构骨架.用扫描电镜系统研究了乳化剂的浓度、分散相体积分数、添加不同沸点的溶剂等对泡孔聚合物断面形态的影响,并考察了泡孔聚合物对水和柴油的吸附情况.结果表明,不同工艺条件下可以制备出不同孔径的泡孔聚合物,加入不同沸点溶剂使得泡孔壁也形成了多孔结构. 相似文献
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Yang L Yang Z Cao W Chen L Xu J Zhang H 《The journal of physical chemistry. B》2005,109(23):11501-11504
The luminescence porous materials of CdTe or CdSe nanocrystals (NCs) were prepared by filling the corresponding NCs into the voids of colloidal crystal by co-deposition of polymer beads and NCs. After removing the beads with tetrahydrofuran (THF), the 3D-ordered porous materials of CdTe (or CdSe) NCs were obtained. The wavelength of maximum photoluminescence of the NCs porous material shows obvious red shift compared with their aqueous dispersion. Under the excitation of high-energy electron the porous materials of CdTe and CdSe NCs will emit photons that can be collected to form a cathode luminescence (CL) image. 相似文献
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