本文選題：氟硅酸廢水 + 沉淀白炭黑　； 參考：《化工新型材料》2017年02期

【摘要】：以氟硅酸廢水和氫氧化鋁為原料通過化學(xué)沉淀法制得沉淀白炭黑;以月桂酸鈉為改性劑對所制得的白炭黑進(jìn)行了表面改性,考察了月桂酸鈉添加量和改性時(shí)間對白炭黑疏水性和分散性的影響。采用場發(fā)射掃描電子顯微鏡(FE-SEM)、傅里葉變換紅外光譜儀(FT-IR)、激光粒度分析儀、X射線衍射分析儀(XRD)等對改性前后的白炭黑樣品的表面形貌、結(jié)構(gòu)性能及分散性等進(jìn)行了表征和分析。結(jié)果表明:當(dāng)改性劑月桂酸鈉添加量為2%,改性時(shí)間為40min時(shí),可制得接觸角為132.5°的疏水性白炭黑。改性后白炭黑樣品的平均粒徑(D50)從32.4μm減小至790nm,比表面積(BET值)從75m~2/g增加到165m~2/g,吸油值(DBP值)從2.25mL/g增加到3.12mL/g。改性后白炭黑樣品的分散性和穩(wěn)定性明顯增加,團(tuán)聚現(xiàn)象減少。
[Abstract]:Silica precipitated by chemical precipitation was prepared from fluorosilicic acid wastewater and aluminum hydroxide, and surface modification of silica was carried out with sodium lauric acid as modifier. The effects of sodium laurate addition and modification time on the hydrophobicity and dispersion of silica were investigated. The surface morphology, structure and dispersity of silica samples before and after modification were characterized and analyzed by field emission scanning electron microscope (SEM), Fourier transform infrared spectrometer (FTIR) and X-ray diffraction analyzer (XRD). The results showed that the hydrophobic silica with contact angle of 132.5 擄could be prepared when the amount of sodium laurate was 2 and the modification time was 40min. The average particle size of modified silica decreased from 32.4 渭 m to 790 nm, and the specific surface area (BET) increased from 75m~2/g to 165 mg / g, and the oil absorption value increased from 2.25mL/g to 3.12 mL / g. The dispersion and stability of the modified silica samples increased obviously, and the agglomeration decreased.
【作者單位】： 合肥工業(yè)大學(xué)化學(xué)與化工學(xué)院;
【分類號】：TQ127.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 郝書峰;鄭治祥;范衛(wèi)青;徐光青;呂s，

本文編號：1891930