The tlow distance and gelating time of the nanocomposites were shorter than that of the pure pf, which meet the standard of the pf used in frictional materials. compared to the pure pf, the silica7pf nanocomposites exhibited excellent heat stability only in nitrogen atmosphere, however, so do vermiculite / pf nanocomposites in both nitrogen and air atmospheres. compared to the brake pad based pf resin, the wear rate of the present one based with silica / pf nanocomposite decreased obviously, especially in high temperature
用烷基
銨ctab和kh - 560對蛭石進行有機化處理，通過原位聚合法制備了
酚醛樹脂接枝改性sio _ 2納米復合材料、
酚醛樹脂kh - 560改性sio _ 2納米復合材料、
酚醛樹脂ctab改性蛭石納米復合材料、
酚醛樹脂/ kh . 560改性蛭石納米復合材料，採用ftir 、 xrd 、 afm和tg分析與流動距離、凝膠化時間的測試，研究了所制備的
酚醛樹酯納米復合材料的結構、固化行為和熱穩定性能，並研究了以
酚醛樹酯納米復合材料為基體的剎車片摩擦磨損性能。
Ethyl vanillin was synthesized by the phase - transfer catalysis cteab and o - ethoxyphenol, which was prepared from pyroeatehol with an overall yield of 55. 2 %, and the factors in the reaction, such as phase - transfer catalysis and temperature, were discussed
摘要以鄰苯二
酚為原料，首先合成中間體鄰乙氧基苯
酚，然後以十六烷基三乙基溴化
銨為相轉移催化劑合成了乙基香蘭素，考察了相轉移催化劑的選擇及反應溫度，最後收率為55 . 2 % 。
The main chemicals used for disinfection purposes are halogenated compounds containing chlorine or iodine, alkalis such as sodium hydroxide or ammonium, phenols such as chlorhexidine acetate, aldehydes, such as the glutaraldehydes, ampholytes ( which may behave either as acids or as bases ), surfactants, and gases such as ethylene oxide
在消毒中使用的主要化合物是含有氯或碘的鹵代化合物、氫氧化鈉或銨之類的堿洗滌劑、氯己啶之類的酚類、戊二醛之類的醛、兩性電解質（可作為酸類或基底使用） 、表面活化劑及環氧乙烷之類的氣體。
