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粉体应用

应用
硅灰石改性及填充工程塑料ABS的研穵/a>
对硅灰石粉的表面改性效果及填充ABS塑料力学性能的研究表?不同的改性剂、改性剂用量、改性时间等工艺条件对硅灰石的改性效果有重要影响。经γ-(甲基丙烯酰氧?丙基三甲氧基硅烷改性后的硅灰石填充工程塑料ABS,增强了复合材料的刚性和熔体流动?其他力学性能虽有小幅下降,但不影响其在工程上的使用;同时降低了ABS塑料使用的成?在填充量?0%?可降低成?5% Surface modif ication of wollastonite and mechanical property of wollastonite-f illed ABS were studied.The results showed that different modifi cation reagent, quantity of modifi cation reagent, time of modifi cation would affect surface modifi cation of wollastonite. Wollastonite treated by γ-methacryloxypropyl trimethoxy silane f illed ABS can improve composite’s rigidity, but its other mechanical properties had little decline. Wollastonite- Filled ABS not only can reduce its cast ,but also didn’t effect ......

4449

2007-07-31

应用
纳米碳酸钙对SBR胶料性能的影哌/a>
试验研究纳米碳酸钙对SBR胶料性能的影响。结果表?单用纳米碳酸钙填充SBR?随着纳米碳酸钙用量的增大,胶料的硫化速度加快,硫化胶的硬度、拉伸强度和撕裂强度增大,回弹值减?耐磨性和抗湿滑性能提高;纳米碳酸钙与炭黑N330并用填充SBR?随着纳米碳酸钙用量的增大,胶料的硫化速度变化不大,硫化胶的拉伸强度和撕裂强度减?回弹值减?耐磨性下?抗湿滑性能提高?..

3755

2007-07-31

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......

4660

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......

3465

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>

4385

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 ... ...

4256

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......

3788

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....

4014

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. ...

4169

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?..

4281

2007-01-21

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