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简述聚电解质-表面活性剂复合物为模板合成多级孔结构材料
聚电解质-表面活性剂复合物 多级结构 介孔二氧化碳 介孔沸石
2014/2/25
采用以聚电解质/表面活性剂复合物介晶为模板引导无机硅源前驱体组装的方法，首次合成了具有多级孔结构的介孔二氧化硅SBA-1的单晶颗粒。改变合成条件可调变多级孔结构介孔二氧化硅的形貌及结构，由此合成了一系列具有多级孔结构的介孔二氧化硅样品，并通过直接掺杂法合成了多级结构的介孔杂原子分子筛，并将其应用在催化反应中。将此方法应用于介孔沸石的合成中，成功合成了介孔沸石Silicalite-1。结果表明，聚电...
采用双酚A型WSR-615和缩水甘油胺型AG-80环氧树脂为基体，以Fe-Si磁性颗粒为填料，通过热压成型方法制备了高含量磁性Fe-Si颗粒/环氧树脂复合材料。研究了环氧树脂基体的玻璃化温度和冲击强度及Fe-Si磁性颗粒含量对Fe-Si/环氧树脂复合材料的冲击强度和磁化强度的影响及温度敏感性。研究结果表明：随着磁性颗粒含量的增加，Fe-Si/环氧树脂复合材料的冲击强度和磁性能增加。当磁性颗粒体积分...
基于划痕试验的碳纤维/环氧树脂复合材料制孔毛刺与撕裂缺陷形成机制
碳纤维/环氧树脂复合材料 划痕试验 毛刺 撕裂 制孔
2014/2/15
碳纤维/环氧树脂（C/EP）复合材料制孔毛刺和撕裂缺陷，对构件的装配精度影响较大。为了揭示C/EP复合材料制孔毛刺和撕裂缺陷的形成机制，采用微米划痕试验研究沿不同纤维方向切削加工时材料的破坏去除过程，并用FEI公司Quanta 200 环境扫描电镜对划切后的沟槽及切屑的形貌进行观察分析。结果表明：当划切方向与纤维方向垂直时，划切力最大，较易产生撕裂缺陷；当划切方向与纤维方向呈30°、45°和60°...
Investigation on flame retardancy, combustion and pyrolysis behavior of flame retarded unsaturated polyester resin with a star-shaped phosphorus-containing compound
Unsaturated polyester resin Thermal degradation Pyrolysis evolved gas analysis Flame retardancy
2013/11/21
The phosphorus-containing star-shaped flame retardant (TRIPOD-DOPO) was synthesized, while the
flame retardant unsaturated polyester resins (FR-UPRs) composites with various amounts of TRIPODDOPO wer...
Influence of surfactants on shear-thickening behavior in concentrated polymer dispersions
Shear-thickening Surfactant Styrene–ethylacrylate copolymer Viscosity
2013/11/10
Concentrated dispersions consisting of 310 nm poly(styrene–ethylacrylate) nanospheres and ethylene glycol, which exhibited pronounced shearthickening
behavior, were prepared in this work. The influen...
Preparation and mechanical properties of the magnetorheological elastomer based on natural rubber/rosin glycerin hybrid matrix
Natural rubber magnetorheological elastomers rosin glyceride wettability CI particle dispersion matrix by rheometer measurements
2013/10/17
To improve the mechanical properties of the natural rubber based magnetorheological elastomers (MREs), rosin glycerin ester was added into the carrier matrix to enhance wettability and dispersibility ...
采用直流电弧放电法制备高结晶性石墨烯, 利用乙醇助溶分散法得到石墨烯/聚苯胺电磁屏蔽复合材料, 研究不同掺杂比例的石墨烯/聚苯胺复合材料的电磁屏蔽性能。拉曼光谱分析表明: 由于石墨烯与聚苯胺之间的相互作用, 复合材料中聚苯胺特征峰比纯聚苯胺特征峰稍弱或向低频方向移动。复合物的电导率随石墨烯掺杂量的增加而增大, 当掺杂质量分数为25%时, 其电导率达到19.4 S/cm, 接近纯石墨烯电导率(20....
采用水相沉淀聚合-原位法合成银/聚丙烯腈(Ag/PAN)复合物, 通过测定其相对黏度, 系统地考察了反应物配比对Ag/PAN复合物分子量的影响。得到较理想的合成条件为, 丙烯腈(AN)单体浓度10%, AgNO3浓度0.6%, K2S2O8浓度2%。将所得复合物进行预氧化后得到纳米银/环化聚丙烯腈(Ag/C-PAN)复合物。通过FTIR分析复合物的组成, 并得到不同预氧化温度和时间下复合物的相对环...
Study of the particles' structure dependent rheological behavior for polymer nanospheres based shear-thickening fluid
Shear thickening Rheological properties Poly nanospheres Viscosity Mechanism
2013/9/16
A novel kind of shear thickening fluid (STF) was developed via dispersing poly(styrene–acrylic acid) (PS–AA) nanospheres into ethylene glycol (EG). By varying the structure characteristics of the PS–A...
Simulation of magneto-induced rearrangeable microstructures of magnetorheological plastomers
Magneto - induced the micro particle structure magnetorheological plastic macroscopic physics
2013/8/21
Magneto-induced microscopic particulate structures of magnetorheological plastomers (MRP) are investigated using particle-level dynamics simulation, as this is a basis for studying the macroscopic phy...
Facile synthesis of lanthanum hypophosphite and its application in glass-fiber reinforced polyamide 6 as a novel flame retardant
Development of flame retardant glass fibre polyamide composite materials mechanical properties thermal stability flame retardancy hypophosphorous acid lanthanum
2013/7/2
This work developed flame retarded glass fiber reinforced polyamide 6 (FR-GFPA) composites with excellent mechanical properties, thermal stability and flame retardancy using a novel flame retardant, l...
Soft magnetorheological polymer gels with controllable rheological properties
Magnetorheological plastic polyurethane swelling of the gel matrix carbonyl iron particles
2013/6/21
A series of magnetorheological (MR) gels consisting of plastic polyurethane matrix swollen by nonvolatile solvent in different weight fractions and carbonyl iron particles were prepared. Their magneto...
有机多孔聚合物的制备和性能研究进展
有机多孔聚合物 合成方法 气体存储与分离 非均相催化
2013/6/17
有机多孔聚合物是一类具有较大比表面积和永久孔结构的新型多孔材料. 由于其制备方法多样、孔径可调控、表面可修饰等特点以及在气体存储、分离及非均相催化等方面具有的应用价值, 近年来有关有机多孔聚合物的研究成为一大热点并且发展较快. 本文重点介绍了近两年在有机多孔聚合物的合成制备方法以及性能研究与应用方面的最新进展.
Magnetic Field-Induced Compressive Property of Magnetorheological Elastomer under High Strain Rate
Magnetorheological elastomers dynamic compression properties high strain rate the split hopkinson pressure bar system
2013/5/30
The dynamic compressive property of magnetorheological elastomer (MRE) under high strain rate was investigated using a modified split Hopkinson pressure bar system. Both the compressive properties in ...
Magneto-induced Microstructure Characterization of Magnetorheological Plastomers using Impedance Spectroscopy
Impedance spectroscopy magnetorheological plastic body the mechanism of microstructure the equivalent circuit model
2013/5/23
An impedance spectroscopy (IS) method is employed to investigate the magneto-induced microstructure mechanism of magnetorheological plastomers (MRP). The IS of MRP with two typical particle distributi...