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• 2018-11-12 09:46發(fā)布了問答

  除甲醛產(chǎn)品和方法有哪些

  　

  436人看過

• 2017-12-18 03:32發(fā)布了問答

  量子液晶屏于oled液晶屏哪個好

  　

  676人看過

• 2016-12-01 10:52發(fā)布了問答

  硅芯片極限終結(jié)：怎樣的替代品？ (1)

  　

  304人看過

• 2016-11-30 21:45發(fā)布了問答

  非晶硅 單晶硅 多晶硅 氧化硅 氮化硅 之間區(qū)別和聯(lián)系

  特別是后兩者和前三者之間是一種什么關(guān)系？ 是不是說 硅化物分為 非晶硅 單晶硅 多晶硅三類 而氧化硅氮化硅是硅化物其中的兩種？那么這么說的話 氧化硅氮化硅也就屬于前三類中的了，屬于哪一類？ 請回答的詳細通俗點。

  1163人看過

• 2012-08-16 00:03發(fā)布了問答

  精細陶瓷不容易碎嗎

  　

  530人看過

• 2012-05-13 03:02發(fā)布了問答

  量子點被強光轟擊，1個光子能出來2電子那叫什么效應(yīng)啊，原理呢

  真心希望得到解答，混分、打醬油的別來謝謝，好心人留下q

  376人看過

• 2011-05-16 00:26發(fā)布了問答

  求助，英文文獻翻譯！

  2. Experimental 2.1 Materials Nano-CaCO3 particles (D50: 30?70 nm by TEM (Fig. 1) and BET: ca.17m2·g-1) were supplied by Shanghai Zhuoyue Nanotech Corporation. Methyl methacrylate (MMA， Shanghai Lingfeng Chemicals) was purified ... 2. Experimental 2.1 Materials Nano-CaCO3 particles (D50: 30?70 nm by TEM (Fig. 1) and BET: ca.17m2·g-1) were supplied by Shanghai Zhuoyue Nanotech Corporation. Methyl methacrylate (MMA， Shanghai Lingfeng Chemicals) was purified by distillation under reduced pressure; potassium persulphate (K2S2O8， initiator， Shanghai Lingfeng Chemicals) was of chemical grade. Silane coupling agent A174 (γ-methacryloxypropyltrimethoxysilane) was purchased from Shanghai Yaohua Factory. Polyvinylchloride (PVC， WS-1000S) was supplied by Shanghai Chlor-Alkali Chemical Co.， Ltd. Fig. 1 Morphology of untreated CaCO3 nanoparticles. Fig. 2 Morphology of PMMA-coated CaCO3 nanoparticles. 2.2 PMMA emulsion polymerization on CaCO3 nanoparticles 2.2.1 Surface silanation of nano-CaCO3 particles The nano-CaCO3 particles were homogeneously dispersed in ethanol (solid content 20%) by a sonication dispersion equipment. The slurry was then heated to 80°C with stirring， and the silane coupling agent A174 (5%， calculated based on the weight of nano-CaCO3 particles) was added into the slurry. After the slurry was stirred for 120 min at 80°C， it was filtered and the filter cake was then dried at 120°C in low vacuum for 120 min to obtain silanated CaCO3 powders. 展開

  469人看過

• 2006-10-28 13:29發(fā)布了問答

  納米技術(shù)到底是什么樣的技術(shù)?通俗一點的

  　

  366人看過

• 2006-02-14 06:59發(fā)布了問答

  納米技術(shù)的定義

  　

  421人看過