HIPS/纳米蒙脱土复合材料的研究

添加不同种类，不同数量的纳米蒙脱土，混炼制得HIPS／纳米蒙脱土复合材料，以改善高抗冲聚苯乙烯（HIPS）的性能，测试了其力学性能，热稳定性性。结果表明，添加3％烘干的蒙脱土Cloisite 30A的HIPS／纳米蒙脱土复合材料具有较好的综合力学性能，可作为工程塑料使用；HIPS／纳米蒙脱土复合材料的热稳定性与阻燃性有所改善，添加5％烘干的蒙脱土Cloisite 15A的HIPS／纳米蒙脱土复合材料具有较好的阻燃性。     

EVOH／有机蒙脱土插层复合材料的制备与表征

将经有机化处理过的蒙脱土与EVOH熔融共混制备插层复合材料，并对该复合材料进行了XRD分析，分析结果表明：聚合物基体已经插入了有机蒙脱土片层间；复合体系中蒙脱土含量越小，蒙脱土被插开的片层间距越大；当复合体系中有机蒙脱土含量≤8％时，形成剥离型复合材料；当有机蒙脱土含量在8％～15％时，形成插层型复合材料；当有机蒙脱土含量大于15％时，复合材料中蒙脱土片层间距无明显变化。对EVOH与蒙脱土熔融共混过程的扭矩分析表明：该复合材料熔融混合9min之后，达到均匀混合和完全塑化的状态。     

偶联剂KH-550修饰蒙脱土及MC尼龙／蒙脱土复合材料的制备与性能研究

利用十六烷基三甲基溴化铵(CTAB)在水相中插层蒙脱土，再利用硅烷偶联剂KH-550与蒙脱土发生反应，制得有机蒙脱土。X射线衍射及傅立叶红外光谱测试结果表明：KH-550进入蒙脱土层间并与其层间羟基发生反应。用该有机蒙脱土成功制备了MC尼龙复合材料。复合材料的XRD、FT—IR和Molau实验结果表明：蒙脱土层间距扩大，MC尼龙(铸型尼龙)已进入蒙脱土层间；蒙脱土的加入改变了尼龙的晶型，当蒙脱土填充量为2％时，α／γ比例最大。同时，蒙脱土的加入提高了复合材料的韧性和热分解温度，使材料具有一定的阻燃性能。     

有机蒙脱土改性无溶剂环氧涂料的研究

利用熔融插层法将有机蒙脱土引入环氧树脂体系，制备出含有纳米分散蒙脱土的无溶剂环氧涂料。研究了有机蒙脱土和环氧树脂不同的插层工艺、有机蒙脱土在环氧树脂中插层和剥离的效果、以及通过改变有机蒙脱土的含量，对漆膜的性能的影响。分析有机蒙脱土在无溶剂环氧防腐蚀涂料中的作用并优化配方。研究证明，加入有机蒙脱土以后，在不增加无溶剂环氧涂料黏度和不降低漆膜力学性能的基础上，耐化学腐蚀性能有了明显提高。     

阻隔性聚合物/蒙脱土纳米复合材料的开发

介绍了聚合物／蒙脱土纳米复合材料的制备方法和主要特性，重点综述了阻隔性聚合物／蒙脱土纳米复合材料的开发进展，包括聚酰胺(PA)／蒙脱土纳米复合材料、聚对苯二甲酸乙二醇酯(PET)／蒙脱土纳米复合材料、聚苯乙烯(PS)／蒙脱土纳米复合材料、超高相对分子质量聚乙烯(UHMWPE)／蒙脱土纳米复合材料。     

蒙脱土在阻燃导静电橡胶输送带中的应用研究

对比未改性蒙脱土、氯丁胶乳改性蒙脱土和插层剂改性蒙脱土在阻燃导静电橡胶输送带胶料中的应用效果。结果表明，在输送带胶料中添加蒙脱土可改善胶料的阻燃性能；改性蒙脱土对胶料拉伸性能、阻燃性能和导电性能的改善效果比未改性蒙脱土好；插层剂改性蒙脱土对胶料性能的改善比氯丁胶乳改性蒙脱土显著。蒙脱土可以作为阻燃导静电输送带胶料的有效阻燃填充剂。     

聚丙烯／有机蒙脱土复合材料的制备、结构及性能

以改性聚丙烯作增容剂，用熔融插层法制备了聚丙烯／有机蒙脱土复合材料，研究了有机蒙脱土对复合材料力学性能的影响，并用X射线衍射研究了复合材料的结构。结果表明：增容剂增加了聚丙烯与蒙脱土片层之间的作用力，使蒙脱土片层间距增大，在聚丙烯基体中分散更好，因而使聚丙烯／有机蒙脱土复合材料的缺口冲击强度大幅度提高，当蒙脱土含量达5％时，缺口冲击强度提高120％，并且拉伸性能下降不大，约下降5％，其中有机蒙脱土TJ4的增韧效果最好。     

聚乙烯/蒙脱土纳米复合材料的制备及性能研究

以蒙脱土／十六烷基三甲基溴化铵作为前驱物负载Ziegler-Natta催化剂，通过插层原位聚合的方法制备了聚乙烯／蒙脱土纳米复合材料。对聚乙烯／蒙脱土纳米复合材料的制备规律进行了研究。用透射电镜、扫描电镜、XRD，DSC等手段研究了结构和性能的相互关系，以及蒙脱土的含量对复合材料熔点与结晶行为的影响。研究表明：蒙脱土的片层结构被破坏，并以纳米级均匀分散在聚合物基体中。蒙脱土的质量分数为3％左右时，聚乙烯／蒙脱土纳米复合材料具有优良的综合性能。     

阴离子开环聚合制备尼龙6/蒙脱土复合材料及其性能研究

以十六烷基三甲基溴化铵为有机插层剂对无机蒙脱土进行处理制得有机蒙脱土（OMMT），然后采用阴离子开环聚合，制备了尼龙6／蒙脱土复合材料。用FT-IR、TG和XRD对有机蒙脱土的插层情况进行了表征。结果表明，插层剂已插入蒙脱土片层中；当OMMT用量为2％时，复合材料的熔点最高，结晶度最大，力学性能最好。     

功能化聚乙烯蜡／有机蒙脱土插层复合母粒的研制

用两种不同改性剂与蒙脱土进行离子交换制得了两种有机蒙脱土，用功能化聚乙烯与有机蒙脱土进行熔融插层复合制备了功能化聚乙烯蜡/有机蒙脱土插层复合母粒，用X-射线衍射，傅立叶红外光谱，热重分析，差示扫描量热和抽提实验等对所得有机蒙脱土和功能化聚乙烯蜡/有机蒙脱土插层复合母粒的结构与性能进行表征。结果表明，有机蒙脱土层间距的增大和功能化聚乙烯蜡的极性活性官能团使得功能化聚乙烯蜡可以被插入到有机蒙脱土的夹层之间，甚至与层间的有机改性剂形成共价键而不被有机溶剂抽提出来。     

纳米蒙脱土改性水性聚氨酯的研究进展

纳米蒙脱土因其特殊结构而在制备纳米复合材料领域起着举足轻重的作用。本文综述了纳米蒙脱土改性水性聚氨酯的制备方法、结构表征及国内外最新研究进展。     

有机修饰钛交联粘土对染料废水的脱色性能研究

以甲基橙溶液为模拟染料废水,研究了十六烷基三甲基溴化铵修饰的钛交联粘土对染料废水的脱色性能。结果表明:有机修饰钛交联粘土对染料废水的脱色性能较原土、钠改性蒙脱土、钛交联粘土有显著提高。在室温条件下,当吸附剂用量为2.0g/L,脱色时间为40min,溶液pH值在4～8之间时,甲基橙的脱色率达95%以上。     

环氧树脂/蒙脱土纳米复合涂料防腐性能的研究进展

环氧树脂涂料在防腐领域中应用广泛,但仍需进行改性以满足应用需求,一个比较经济、有效的途径就是添加纳米填料。蒙脱土片层分散在环氧树脂基料中时,能有效阻隔腐蚀性介质穿过涂膜,进而提高纳米复合涂料的防腐性能。简单介绍了蒙脱土的结构,环氧树脂/蒙脱土纳米复合涂料的制备方法。综述了近年来环氧树脂/蒙脱土纳米复合涂料防腐性能的研究进展。     

纳米无机粒子补强天然橡胶的研究 (Ⅲ)纳米粘土/天然橡胶复合材料的研究

粘土是天然纳米片层材料,将改性后的纳米粘土采用插层法将聚合物基体或聚合物单体插入片层中,共聚共凝,制备的纳米粘土/聚合物复合材料表现出优异的综合性能,是近来研究的热点.本文综述了纳米粘土的改性以及插层法制备纳米粘土/天然橡胶复合材料的研究进展.     

蒙脱土的改性方法及阻燃应用的研究进展

蒙脱土是最具商业用途的无机高分子化合物。介绍了蒙脱土的化学组成、理化性质和改性方法,综述了改性蒙脱土阻燃高分子材料的研究进展。     

Sorption Properties of Organo Modified Montmorillonite Clay for the Reclamation of Chromium (VI) from Waste Water

Silicon - The natural Montmorillonite (Mt) clay was modified with three newly synthesized cationic surfactants such as 2-(dodecanoyloxy)-N,Nbis(2-hydroxyethyl)-N(oxiran-2-ylmethyl)ethane-1-ammonium...     

Effect of fiber‐forming conditions and type of MMT modifier on the structure and properties of multifunctional polyimideamides nanocomposite fibers

The effect of fiber‐spinning conditions on the structure, sorption, and strength properties of polyimideamides (PIA) nanocomposite fibers has been examined. Montmorillonite (MMT) modified with octadecylamine was used as a nanoadditive. The properties of fibers containing differently modified MMT were compared. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 2940–2944, 2007     

Organo Modified Nanoclay/Sawdust Mixtures for Hydrocarbon Removal from Water

Silicon - Organo modified nanoclay (OMNC) and OMNC/sawdust mixture were prepared and applied for hydrocarbon removal from water. Montmorillonite and sawdust were used as raw materials while cetyl...     

New polylactide-layered silicate nanocomposites. 2. Concurrent improvements of material properties, biodegradability and melt rheology

Our continuing research on the preparation, characterization, materials properties, and biodegradability of polylactide (PLA)-layered silicate nanocomposites has yielded results for PLA-montmorillonite nanocomposites. Montmorillonite modified with trimethyl octadecylammonium cation was used as an organically modified layered silicate for the nanocomposites preparation. The internal structure of the nanocomposites in the nanometer range has been established by using wide-angle X-ray diffraction and transmission electron microscope analyses. All the nanocomposites exhibited superior improvement of practical materials properties such as storage modulus, flexural modulus, flexural strength, heat distortion temperature, and gas barrier property as compared to that of neat PLA. The biodegradability of neat PLA and a representative nanocomposite was also studied under compost, and the rate of biodegradation of neat PLA significantly increased after nanocomposites preparation. The melt rheology of neat PLA and various PLACNs was also studied.     

Synthesis and characterization of some polyacrylate/montmorillonite nanocomposites by in situ emulsion polymerization using redox initiation system

Intercalated modification of Montmorillonite clay (MMT) with three different amino acids—Alanine, Leucine, and Phenylalanine—in the presence of hydrochloric acid followed by surface modification by methyl triethoxy silane coupling agent to produce double modified Montmorillonite clay which is characterized by X‐ray diffraction (XRD) and Thermogravimetric analysis (TGA). The data shows an increase in d‐spacing of modified clay as a result of cationic exchange. Double modified MMT clay was used in the preparation of Polyacrylate/clay nanocomposites by using an in situ redox emulsion polymerization of polyglycidylmethacrylate (PGMA) and polymethylmethacrylate (PMMA). The structure and properties of the prepared nanocomposites were achieved by XRD, TGA, and SEM. The results show that all weight loses temperatures for the nanocomposite samples are higher than that of pure polymer in both PGMA and PMMA. It is also obvious that the increasing in the clay content plays an effective role in the increasing of thermal stability of these materials. SEM shows that the clay is more homogenously dispersed in PMMA than in PGMA matrix. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009