本文選題：木質(zhì)素磺酸鈣　切入點(diǎn)：吸附　出處：《高分子學(xué)報(bào)》2016年03期

【摘要】：以木質(zhì)素磺酸鈣(LS-Ca)、丙烯酸(AA)為原料,乙二醇二甲基丙烯酸酯(EDMA)為交聯(lián)劑制備了木質(zhì)素磺酸鈣改性丙烯酸復(fù)合吸附樹脂(LSAA).采用紅外光譜、掃描電子顯微鏡、熱重分析、比表面分析和吸附實(shí)驗(yàn)對(duì)LSAA樹脂的性能進(jìn)行表征.結(jié)果顯示,LSAA樹脂的初始分解溫度為291.2℃,具有良好的熱穩(wěn)定性;表面粗糙,介孔豐富,樹脂表面有較豐富的羥基等活性基團(tuán).LSAA對(duì)甲基橙的吸附過程受p H值的影響,298 K,p H=3時(shí),24 h吸附量為188.33 mg/g;Langmuir和Freundlich方程均能較好地?cái)M合甲基橙在LSAA樹脂上的吸附等溫線,吸附動(dòng)力學(xué)過程符合準(zhǔn)二級(jí)動(dòng)力學(xué)方程,吸附為以物理吸附為主的放熱過程.KannanSundaram模型擬合說明,LSAA的吸附過程分為吸附劑表面吸附、孔道緩慢擴(kuò)散及小孔緩慢擴(kuò)散3個(gè)階段,直線都不經(jīng)過原點(diǎn),內(nèi)擴(kuò)散不是控制吸附過程的唯一步驟.
[Abstract]:The LSAA resin modified by calcium lignosulfonate was prepared from calcium lignosulfonate (LS-CaN), acrylic acid (AAA) and ethylene glycol dimethacrylate (EDMA) as crosslinking agent. The modified resin was characterized by infrared spectroscopy, scanning electron microscope and thermogravimetric analysis. The properties of LSAA resin were characterized by specific surface analysis and adsorption experiments. The results showed that the initial decomposition temperature of LSAA resin was 291.2 鈩，

本文編號(hào)：1689071