發(fā)布時(shí)間：2018-01-22 03:52

  本文關(guān)鍵詞： 超細(xì)h-BN粉 無水乙醇 pH-Zeta電位 復(fù)合分散 分散機(jī)理　出處：《硅酸鹽通報(bào)》2017年04期 　論文類型：期刊論文

【摘要】：針對(duì)超細(xì)h-BN粉體易團(tuán)聚、與有機(jī)基體界面相容性較差的缺點(diǎn),研究了其在無水乙醇介質(zhì)中的分散工藝。首先在測(cè)定其pH-Zeta電位的基礎(chǔ)上,選取陰離子型(SA、OA、SDBS)、非離子型(PVP、KH570、司班85)和高分子型(PEG4000)分散劑進(jìn)行超聲分散研究。然后從以上幾種分散劑中選取三種分散劑進(jìn)行復(fù)合分散。實(shí)驗(yàn)發(fā)現(xiàn):在最佳配比下,復(fù)合分散體系較單分散劑分散效果明顯提升,PEG4000與SA的復(fù)合分散比最佳單分散劑的效果提升了18%;KH570與SA的復(fù)合分散體系比最佳單分散劑的效果提升了11%;推薦h-BN粉在無水乙醇中的分散工藝為:pH值為9時(shí),在560 W的功率下用SA(4wt%)與PEG4000(1wt%)或者SA(1wt%)與KH570(4wt%)復(fù)合超聲90 min。
[Abstract]:In order to solve the problem that ultrafine h-BN powders are easy to agglomerate and have poor compatibility with organic matrix, the dispersion process of ultrafine h-BN powders in anhydrous ethanol medium was studied. Firstly, the pH-Zeta potential was determined. The anion type SAA OA SDBSN, Nonionic type PVP KH 570 were selected. Then three dispersants were selected from the above dispersants for composite dispersion. Compared with monodispersant, the dispersion effect of the composite dispersion system increased by 18% compared with that of the best monodispersant of PEG4000 and SA. The effect of the composite dispersion system of KH570 and SA was improved by 11% than that of the best monodispersant. The dispersing process of h-BN powder in anhydrous ethanol was recommended as follows: the pH value of h-BN powder was 9:00. At a power of 560W, ultrasound was combined with SAH 4wt) and PEG40001wt) or SAH5704wt) for 90 mins.
【作者單位】： 南京工業(yè)大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：江蘇高校優(yōu)勢(shì)學(xué)科建設(shè)工程項(xiàng)目(蘇政辦發(fā)2011-6)
【分類號(hào)】：TB383.3;TQ128
【正文快照】： 1引言六方氮化硼(h-BN)是類似于石墨的片層白色粉末,俗稱“白石墨”[1]。由于其良好的導(dǎo)熱性以及耐熱性[2],廣泛以填料形式應(yīng)用于熱界面材料[3]之中。由熱界面材料的導(dǎo)熱模型可知[4-5],在填充量較大的情況下,填料的粒徑越小越容易形成導(dǎo)熱通路,利于熱的傳遞。然而填料的粒徑越

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本文編號(hào)：1453563