搜索结果: 16-30 共查到“知识库 有机高分子材料其他学科”相关记录71条 . 查询时间(4.264 秒)
Aerosol-assisted synthesis of mesoporous organosilica microspheres with controlled organic contents
aerosol-assisted synthesis mesoporous material surfactant
2009/4/30
Periodic mesoporous organosilica (PMO) spherical particles with different organic contents were synthesized in one pot by reacting 1,2-bis(triethoxysilyl)ethane (BTSE) with tetraethylorthosilicate (TE...
Porous hydroxyapatite and biphasic calcium phosphate ceramics promote ectopic osteoblast differentiation from mesenchymal stem cells
calcium phosphate ceramics porous structure osteogenesis
2009/4/30
Because calcium phosphate (Ca–P) ceramics have been used as bone substitutes, it is necessary to investigate what effects the ceramics have on osteoblast maturation. We prepared three types of Ca–P ce...
Magneto-optical studies of low-dimensional organic conductors
periodic orbit resonance Fermi surface low-dimensional organic conductors
2009/4/30
Our periodic orbit resonance (POR) results on quasi-two-dimensional (q2D), highly anisotropic q2D and quasi-one-dimensional (q1D) organic conductors are reviewed together with our rotational cavity ma...
Theoretical study of the zero-gap organic conductor α-(BEDT-TTF)2I3
organic conductor α-(BEDT-TTF)2I3 massless Dirac fermion
2009/4/30
The quasi-two-dimensional molecular conductor α-(BEDT-TTF)2I3 exhibits anomalous transport phenomena where the temperature dependence of resistivity is weak but the ratio of the Hall coefficient at 10...
Experimental study of organic zero-gap conductor α-(BEDT-TTF)2I3
organic massless Dirac Fermions system transport phenomena zero mode
2009/4/30
A zero-gap state with a Dirac cone type energy dispersion was discovered in the organic conductor α-(BEDT-TTF)2I3 under high hydrostatic pressures. This is the first two-dimensional (2D) zero-gap stat...
Recent progress in high-pressure studies on organic conductors
organic conductor superconductivity charge-density-wave spin-density-wave
2009/4/30
Recent high-pressure studies of organic conductors and superconductors are reviewed. The discovery of the highest Tc superconductivity among organics under high pressure has triggered the further prog...
Organic superconductors with an incommensurate anion structure
organic superconductor incommensurate composite crystal Fermi surface
2009/4/30
Superconducting incommensurate organic composite crystals based on the methylenedithio-tetraselenafulvalene (MDT-TSF) series donors, where the energy band filling deviates from the usual 3/4-filled, a...
Tetrathiapentalene-based organic conductors
molecular conductor tetrathiapentalene cyclic voltammetry
2009/4/30
The synthesis, structure and properties of tetrathiapentalene-based (TTP) organic conductors are reviewed. Among various TTP-type donors, bis-fused tetrathiafulvalene, 2,5-bis(1,3-dithiol-2-ylidene)-1...
高分子聚胺PED的合成及废水硫酸根的吸附性能
环氧氯丙烷 二乙烯三胺 硫酸根 吸附性能
2009/4/9
以环氧氯丙烷和二乙烯三胺反应合成1种高分子聚胺(以下简称PED)，采用FTIR，DSC-TG，EDX和SEM等方法对产物进行结构表征，并考察合成的高分子聚胺PED水溶液中硫酸根离子的脱除能力。研究结果表明：聚合产物PED热稳定性随产物氨基含量增加而增大，热分解温度可达285 ℃；产物PED对硫酸根有很强的脱除能力，其中，产物投加量的增加和酸性条件均有利于硫酸根脱除率的提高；在中性和酸性溶液中(硫酸...
O，O-双十二酰基壳聚糖/聚乳酸复合膜中氢键的作用
有机高分子材料 酰基壳聚糖 聚乳酸
2009/3/12
研究了氢键对O,O-双十二酰基壳聚糖/聚乳酸(OCS/PLLA)溶液复合膜相容性的影响.结果表明,复合膜中氨基和羟基的伸缩振动谱带相对各纯组分均有明显的红移,OCS的氨基与PLLA的羰基之间存在强烈的氢键作用;随着OCS含量的增加,PLLA在2θ=16.7°和2θ=19.1°的结晶衍射峰往低角度略有偏移,峰强逐渐减弱;当OCS含量(质量分数)(?)60%时,PLLA的结晶衍射峰甚至消失,表明氢键使...
温度与载荷对GH4169/5CrMnMo界面接触换热的影响
界面温度 接触载荷 接触换热系数 经验关系式
2009/3/9
基于传热学基本原理建立合理简化的热接触模型。应用稳态法，通过自制的实验设备对GH4169高温合金与5CrMnMo模具钢的界面接触换热系数进行测量。根据实验数据归纳出接触换热系数的经验计算关系式，比较计算结果和实验结果。研究结果表明：接触界面温度变化范围为240~560 ℃，接触载荷能够达到15.68 MPa；接触换热系数随界面温度和接触载荷的增加呈现增大趋势，但在320 ℃和470 ℃附近出现换热...
磁头表面含氟三氯硅烷自组装膜的生长机理
磁头表面 氟三氯硅烷 自组装膜
2009/3/2
在磁头表面制备了1H,1H,2H,2H-四氢全氟辛烷基三氯硅烷(FOTS)自组装膜,采用X射线光电子能谱仪(XPS)、时间飞行二次离子质谱仪(TOF-SIMS)、接触角测量仪和原子力显微镜(AFM)对FOTS自组装膜进行表征,研究了自组装膜的生长机理.结果表明,FOTS自组装膜的生长经过了亚单层膜的低等覆盖、亚单层膜的中等覆盖、团聚和聚结四个阶段.其中第一层和第二层自组装膜的亚单层膜形态和生长方式...
项目简介：有机硅烷偶联剂在子午线轮胎胶料中有着特殊的补强功能和粘合性能，并能改善胶料的硫化特性，抗硫化还原特性，提高胶料的抗撕裂性能，降低磨耗，同时又能降低轮胎的滚动阻力，提高轮胎的制动性能，降低燃油，节约能源，是国际市场方兴未艾的新型环保绿色轮胎所必不可少的关键材料。有机硅烷偶联剂分子中同时存在两种性质和作用完全不同的官能团，在子午线轮胎胶料中，有机硅烷偶联剂的一端与白炭黑等无机材料起反应，形成...
海藻酸钙水凝胶对电刺激的响应行为
海藻酸钙水凝胶 电刺激响应 有机高分子材料
2009/2/16
以CaCl2为交联剂采用浸渍法制备了海藻酸钙水凝胶,研究了海藻酸钙水凝胶的溶胀吸水率及其电刺激响应行为.结果表明,在NaCl水溶液中,海藻酸钙水凝胶的平衡溶胀比随着NaCl溶液浓度的增大而增大,随着交联剂CaCl2溶液浓度的增大而减小.海藻酸钙水凝胶在NaCl水溶液中在非接触直流电场作用下向负极弯曲,其弯曲速度、弯曲偏转程度和应变随着外加电场强度的增大而增大,随着NaCl溶液离子强度的变化在离子强...