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粉体应用

应用
超微细滑石粉的表面改性及对聚丙烯性能的影哌/a>
利用力学性能、比表面?BET)等测试方法考察了钛酸酯偶联?NDZ-311)对滑石粉(Talc)的表面改性作用。研究发?在基体材料具有一定韧性的条件?经NDZ-311表面改性Talc能有效提高复合体系的冲击性能,与未改性Talc填充的复合材料相?其缺口冲击强度可提高57.7%。利用FT-IR、SEM等考察了无机刚性粒子增韧PP的结构形态及增韧机理,结果表明,NDZ-311在改性Talc过程?两者间除发生物理吸附作用外,还发生了化学作用,在Talc表面形成了牢固的包覆?改变了无机粒子的表面性能 Titanate coupling agent(NDZ-311) was used as surface modifier to treat Talc.The test of mechanical properties and BET of PP/POE composites demonstrated that NDZ-311 can considerably improve the Izod notched impact strength 57.7%.At the same time,the FT-IR spectrum analysis revealed that NDZ-311 bonds to the Talc surface by physical absorption and by chemical reaction.The NDZ-311 can change the surface properties of Talc,resulting in greater hydrophobic property of the surface and enhanced compatibility with......

4697

2007-07-31

应用
酯化改性纳米二氧化硅及其在聚酯漆中应用
采用液相萃取?通过四氢呋喃从水相中萃取出硅?经有机醇共沸蒸馏,制备了表面酯化改性纳米二氧化硅的醇分散液,其外观透明、均匀稳定,二氧化硅含量可高?5%,达到纳米级分散。研究了在少量纳米二氧化硅作用下,纳米复合聚酯涂膜的物理机械性能。结果表?少量纳米SiO2能提高涂膜的硬度、耐磨性和紫外吸收性能,不影响透明度 Silica was extracted from the sodium silicate solution to THF firstly,and then the nanosilica alcohol solution was prepared by distillation.The solution was stable,uniform and clear.The content of SiO2 could be up to 25%.SiO2/polyester composite film was obtained by mixing the nanosilica alcohol solution with the polyester.Performance tests of the composite film were carried out according to the national standard.The results showed that the nanosilica alcohol solution had a good compatibility with polyester......

3498

2007-07-31

应用
改性Si_3N_4陶瓷纳米粉体在丁腈橡胶中的应?/a>

4438

2007-06-04

应用
纳米活性碳酸钙在轮胎中的应?/a>
试验研究纳米活性碳酸钙在轮胎中的应用效果。结果表?在斜交轮胎胎侧和胎体帘布胶料配方中加??份纳米活性碳酸钙,并适当调整配方中炭黑和软化剂用?可改善胶料的物理性能和工艺性能;在子午线轮胎胎面胶配方中加入4份纳米碳酸钙,胶料的抗撕裂性能提高,耐磨性能和其它物理性能相当,挤出工艺性能得到改善;同时可以降低生产成本,具有一定的经济效益 The application of an active nano-calcium carbonate in tire was experimentally investigated.The results showed that the processibility of rubber compound and the physical properties of vulcanizate improved by adding 5~8 phr active nano-calcium carbonate in the sidewall and carcass ply compounds of bias ply tire and adjusting the addition level of carbon black and softener properly;the comparable tear strength,abrasion resistance and other physical properties of vulcanizate and the better extrudability were ... ...

4325

2007-05-28

应用
纳米碳酸钙增强聚丙烯纤维的研穵/a>
将分散剂、纳米碳酸钙和聚丙烯(PP)切片按一定比例混合纺丝制得改性PP纤维。并研究了改性PP纤维的结构与性能。结果表昍当分散剂与纳米碳酸钙的质量比??,纳米碳酸钙质量分数为0?%?改性PP纤维的断裂强度和初始模量最?分别??7,90?6 cN/dtex．纳米碳酸钙在改性PP纤维中分散均匀,且粒径为40?0 nm。与PP纤维相比,改性PP纤维的取向度变化不大,结晶度有所提高,但当纳米碳酸钙质量分数大于等?%?其结晶度下降明显 The modified PP fiber was prepared by blending a dispersant,nano-calcium carbonate and polypropylene(PP) chips at a specific ratio.The structure and properties of modified PP fiber were studied.The results showed that the breaking strength and initial modulus were maximized as 7.79 and 90.36 cN/dtex respectively when the mass ratio of the dispersant to nano-calcium carbonate was 1? and the content of nano-calcium carbonate was 0.3% by mass fraction.The nano-calcium car- bonate with particle size of 40-80μm......

3854

2007-05-28

应用
高岭土改性及其在FCC催化剂中的应?/a>
阐述了高岭土资源概况、高岭土改性技术现状以及改性高岭土在催化裂化催化剂中的应用,为高岭土资源的开发利用和开发具有独特功能的催化裂化催化剂提供新的思路 Modification of kaolin and its application in FCC catalyst were reviewed in this paper....

4054

2007-05-28

应用
超细碳酸钙表面接枝改性及其在橡胶中的应用
首先用硅烷偶联剂对超细碳酸钙粉体进行预处?在其表面形成接枝活性点;再让MMA在改性碳酸钙粒子表面经自由基聚合,形成超细碳酸?PMMA复合粒子。把接枝改性后的碳酸钙粒子填充于橡胶中,实验结果表明,碳酸钙粒子经表面接枝改性后,可提高与有机基体的相容?填充材料的力学性能优于未改性碳酸钙 In this paper,the superfine calcium carbonate was disposed by γ-methacryloxy-propyltrimethoxysilane first.Then the superfine CaCO3/PMMA composite particles were prepared through free-radical polymerization in the presence of superfine CaCO3.The modified superfine calcium carbonate then was filled into nature rubber.The results showed that the surface grafting CaCO3 powder could disperse more homogeneously in rubber and possess better mechanical properties than unmodified CaCO3. ...

4230

2007-03-18

应用
纳米碳酸钙在造纸工业中的应用
纳米碳酸钙作为一种纳米功能材?具有优良的物化特?在造纸工业中得到广泛的应用。本文综述了纳米碳酸钙的发展简史、制备技术和改性方法及其在造纸工业中的应用?..

4346

2007-01-21

应用
无机粉体改性塑料的研究进展
主要针对近几年来国内外关于无机粉体改性塑料技术的发展进行较详尽的综述,主要阐述了粉体粒子的超细化技术和表面改性技术的发展,以及无机粉体改性塑料机理研究的最新进展?..

3932

2007-01-21

应用
硫酸钡粉体在PVC-U复合材料中的应用
对硫酸钡粉体应用于PVC-U复合材料进行了初步研?着重论述了各组分对复合材料的力学性能和相对密度的影响,利用激光粒度测试仪对硫酸钡粉体进行了测?得到了粒径分布曲线和累计曲线。结果表?PVC树脂质量对复合材料的力学性能影响很大,对相对密度影响不?当硫酸钡用量相同?硫酸钡的活化与否与粒径大小对复合材料的相对密度影响不?当硫酸钡用量增加?复合材料拉伸强度降低,相对密度增加;随着DOP用量的增?复合材料的拉伸强度降?断裂伸长率显著增?相对密度下降?..

3839

2007-01-11

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