有机/无机纳米复合材料的制备及应用

有机/无机纳米复合材料是一种集有机、无机、纳米材料的诸多特性于一身的新型功能材料,正在成为一个新兴的极富生命力的研究领域,本文对有机/无机纳米复合材料的制备方法、应用进行了综述.     

天然高分子/无机纳米复合材料的研究进展

天然高分子/无机纳米复合材料是一种性能优异的新型材料.阐述了天然高分子/无机纳米复合材料的结构、制备方法及性能,介绍了各类天然高分子/无机纳米复合材料的发展状况,展望了其开发领域.     

有机/无机纳米复合材料的制备及其摩擦学性能研究展望

本文综述了有机 无机纳米复合材料的制备方法、特点及其摩擦学性能研究 ,指出了制备方法中的缺陷及目前存在的问题 ,并对有机 无机纳米复合材料今后的发展作了展望。     

有机／无机纳米复合材料的研究进展

有机／无机纳米复合材料是一种集有机、无机纳米材料的诸多特性于一身的新型复合材料,正在成为一个新兴的极富生命力的研究领域,本文对有机／无机纳米复合材料的发展历程、制备方法及应用进行了综述,并对其今后的发展作了展望。     

有机-无机纳米复合材料合成方法的发展

概述了近年来将有机聚合物嵌入层状无机物晶体夹层或坑道中,制备有机 无机纳米复合材料的新方法及有机 无机纳米复合材料的性能,讨论了层状无机物晶体的结构特点,并展望了有机 无机纳米复合材料的主要应用领域。     

聚苯乙烯系有机-无机纳米复合材料的研究进展

综述了近十几年来以聚苯乙烯为有机相的有机 -无机纳米复合材料的研究进展 ,介绍了 4种制备有机 -无机纳米复合材料的常用方法 ,对该领域的发展进行了初步的探讨     

有机／无机纳米复合材料的制备及其摩擦学性能研究展望

本文综述了有机／无机纳米复合材料的制备方法，特点及摩擦学性能研究，指出了制备方法中的缺陷及目前存在的问题，并对有机／无机纳米复合材料今后的发展作了展望。     

有机-无机纳米复合材料的制备与界面特性

有机－无机纳米复合材料是一种新型功能材料，本文综述了有机－无机纳米复合材料的界面特性、与界面效应相关的制备，并对有机－无机纳米复合材料的研究前景进行了展望。     

核壳型纳米复合材料的研究进展

核壳结构纳米复合材料因其独特的结构而呈现出诸多新奇的物理、化学特性,具有广阔的应用前景.系统地综述了近年来无机/无机、无机/有机、有机/无机3种类型的核壳结构纳米复合材料合成方法的研究进展与形成机理,重点阐述了它们在催化、生物医学、药物控制释放和光子晶体等领域的应用,最后展望了核壳结构纳米复合材料未来的发展方向.     

导电聚合物/无机纳米复合材料的研究进展

主要介绍了导电聚合物/无机纳米复合材料的制备方法,详细评述了各种制备方法的优缺点,总结了导电聚合物/无机纳米粒子复合材料性能的改善与应用领域,并展望了导电聚合物/无机纳米粒子复合材料的研究方向和应用前景.     

聚合物基有机-无机纳米复合材料研究及应用前景

分别阐述了聚合物基有机－无机纳米复合材料的制备方法，并介绍了不同纳米复合体系的应用现状，最后展望了聚合物基有机－无机纳米复合材料的应用前景。     

多面体低聚倍半硅氧烷纳米杂化材料制备方法研究进展

多面体低聚倍半硅氧烷(POSS)作为一种新型的有机-无机纳米杂化材料,在现代材料科学中显示出潜在的使用价值。不同取代基的POSS具有不同的反应活性,因此制备POSS基纳米复合材料的方法层出不穷。综述了以物理共混法和化学合成法制备POSS基纳米复合材料的研究进展,并展望了今后POSS基纳米杂化材料的发展前景。     

PEDOT∶PSS及其纳米复合材料热电性质的研究进展

近年来,随着能源危机的加剧,可以将热能与电能进行直接转换的热电材料得到了广泛的关注。在众多热电材料体系中,有机无机纳米复合热电材料具有独特优势。相比于无机材料,有机材料成本低、质量轻、机械柔韧性好、热导率较低。添加不同类型的添加材料构成纳米复合材料后,额外引入的声子-界面散射能进一步降低热导率,同时有机无机材料能带不匹配引起的载流子筛选效应进一步提升塞贝克(Seebeck)系数。因此,目前大量工作证明有机无机纳米复合热电材料有潜力获得高的热电优值(Figure of merit,ZT),在微型热电制冷器件、柔性可穿戴发电设备、温度传感器等领域均具有光明的应用前景。本文聚焦聚(3, 4-乙烯二氧噻吩)∶聚(苯乙烯磺酸盐)(PEDOT∶PSS)热电材料及以其为基底构成的纳米复合材料热电性能的研究工作,综述了提升PEDOT∶PSS热电性能的物理方法、化学试剂改性法等。进一步重点讨论了加入不同类型的无机填料的PEDOT∶PSS基纳米复合材料热电性质的研究进展,并揭示了其热电性能提升的内在机制。     

Effect of DMPA-clay-POSS content on thermal and mechanical properties of nanostructured ionomeric polyurethanes

Two series of ionomeric waterborne polyurethane (WBPU)/POSS-clay hybrid nanocomposites were synthesized using various amounts of a diol-functionalized polyhedral oligomeric silsesquioxane (POSS)/clay (Cloisite 15A) component with two different 2,2-dimethylol propionic acid (DMPA) contents (13.58 mole% and 23.89 mole%). The Tg of WBPU/POSS-clay hybrid nanocomposite was shifted towards higher temperatures in comparison to virgin WBPU and WBPU/clay nanocomposites. The thermal stability of the investigated WBPU/POSS-clay hybrid nanocomposites also dramatically improved compared to pristine WBPU and WBPU/clay nanocomposites. The higher Young's modulus of the WBPU/POSS-clay hybrid nanocomposites as a function of optimal POSS content suggests that the organic-inorganic hybrid networks are significantly reinforced by the inclusion of POSS.     

有机-无机纳米复合材料的合成、性质及应用前景

综述了近年来有机-无机纳米复合材料的合成、性质以及应用等方面的发展概况。     

Preparation of novel nano-adsorbent based on organic-inorganic hybrid and their adsorption for heavy metals and organic pollutants presented in water environment

The nanocomposites based on organic-inorganic hybrid have been attracting much attention due to their potential applications used as new type of functional materials, such as colloidal stabilizers, electro-optical devices, and nanocomposites materials. The organic-inorganic hybrid of poly(acrylic acid-acrylonitrile)/attapulgite, P(A-N)/AT nanocomposites, were prepared by using in situ polymerization and composition of acrylic acid (AA) and acrylonitrile (AN) onto modified attapulgite (AT) nanoparticles. The resulting P(A-N)/AT nanocomposites were transformed into novel nano-adsorbent of poly(acrylic acid-acryloamidoxime)/attapulgite by further functionalization, i.e. P(A-O)/AT nano-adsorbent. The adsorption properties of P(A-O)/AT toward metal ions were determined, and the results indicated that the adsorbents with nanocomposite structure held a good of selectivity to Pb(2+) among numerous metal ions. The maximum removal capacity of Pb(2+) was up to 109.9 mg/g and it is notable to see that the adsorption removal of P(A-O)/AT nano-adsorbent for Pb(2+) could achieve more than 96.6% when the initial concentration of Pb(2+) was 120.0 mg/l. The kinetics, isotherm models, and conductivity were introduced to study the adsorption mechanism of P(A-O)/AT for Pb(2+) and it was concluded that it could be chemisorptions process and the best coordination form took place when AO:AA:Pb(2+) = 1:1:1. In addition, after simply treated with CTAB, P(A-O)/AT nano-adsorbent showed better adsorption properties for phenol than the same kinds of materials.     

Synthesis and characterization of polyaniline/MCM-41 nanocomposites and their photocatalytic activity

The novel organic-inorganic nanocomposites were synthesized via in-situ polymerization of polyaniline (PANI) with mesoporous silica (MCM-41) for methylene blue (MB) dye degradation under visible light. The synthesized PANI/MCM-41 nanocomposites were characterized through Fourier transform infrared (FTIR), X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM), and UV-visible studies. The structural and optical properties confirmed the interaction between PANI and MCM-41. The photocatalytic experiments showed that the MB dye was efficiently degraded by approximately 70% under light irradiation over the surface of the PANI/MCM-41 nanocomposites. The degradation might occur due to the efficient charge separation of the e(-)-h+ pairs at the interface of PANI and MCM-41 in the excited state under light irradiation.     

Hybrid organic-inorganic ZnS-loaded nanocomposite films for stable optical coatings

Nanocomposite films consisting of a sol-gel hybrid organic-inorganic matrix incorporating ZnS nanocrystals (NCs) have been developed. The nanocomposites films have high visible transparency, enhanced refractive index and photochemical stability. Usage of the diphenyldimethoxysilane and of the ZnS NCs at different concentrations allowed tuning the optical characteristics. Hybrid matrix, NCs and nanocomposite films were characterized by X-Ray Diffraction, High Resolution Transmission Microscopy, spectroscopic ellipsometry, UV-visible and Fourier Transform Infrared Spectroscopy. Applications of nanocomposite films are being investigated as a stable coating for optical purposes.     

Large-scale synthesis of organophilic zirconia nanoparticles and their application in organic-inorganic nanocomposites for efficient volume holography

We present a multigram scale, one-step nonaqueous synthesis route to monodisperse, highly crystalline ZrO(2) nanoparticles. The nanoparticles can be stabilized in nonpolar solvents via a simple functionalization procedure using only minute amounts of organic stabilizers. Their great potential in materials applications is demonstrated by the fabrication of organic-inorganic nanocomposites that can be selectively photopolymerized to inscribe extremely effective and volume holographic gratings with the highest refractive index contrast (n(1) of up to 0.024) achieved so far.     

Hybrid Intercalative Nanocomposites

This review focuses on organic-inorganic hybrid nanocomposites, a research area that has made rapid progress in recent years. Inorganic components (hosts) include both natural materials (clays, silicates, smectites, layered phosphates, and others) and compounds prepared by different synthetic techniques. Into their interlayer spaces, various organic guests—solvents, monomers, and polymers—can be intercalated. Among the hybrid nanocomposites analyzed in detail are those based on polyconjugated electrically conducting polymers, such as poly(aniline) and poly(pyrrole), and various mineral matrices. Particular attention is paid to polymer-metal chalcogenide nanocomposites and their applications as semiconducting materials. One of the most common and practically important intracrystalline processes in the fabrication of hybrid nanocomposites is the incorporation of monomer molecules into pores of the host, followed by controlled internal transformations into polymer, oligomer, or hybrid-sandwich products (in situ postintercalative transformations). This approach is often called “ship-in-the-bottle” polymerization. Another widely used approach is the incorporation of macromolecules into layered host lattices from solutions or melts. This process offers the possibility of producing graphite intercalation compounds and inorganic-organic multilayer composites, including self-assembled nanocomposites in the form of (P/M) _n multilayers, where M and P are oppositely charged inorganic and polymer nanolayers.