本文選題：腐植酸鈉 + 表面引發(fā)原子轉(zhuǎn)移自由基聚合��； 參考：《高分子材料科學(xué)與工程》2017年09期

【摘要】：采用新疆奇臺風(fēng)化煤為原料,通過表面引發(fā)原子轉(zhuǎn)移自由基聚合(SI-ATRP)方法制備腐植酸鈉-聚甲基丙烯酸甲酯接枝共聚物(HA-Na-PMMA),通過正交實(shí)驗(yàn)確定了SI-ATRP最佳合成工藝條件:反應(yīng)時(shí)間8 h,溴化亞銅∶溴化銅∶2,2-聯(lián)吡啶質(zhì)量比為20∶4∶20,物料質(zhì)量比∶體積比為1 g∶10 m L,反應(yīng)溫度80℃。通過SI-ATRP制備的HA-Na-PMMA的接觸角為84°,比HA-Na的接觸角增大了54°,表明HA-Na的SI-ATRP接枝共聚效果顯著。以HA-Na-PMMA為吸附劑,研究其對Cr(Ⅵ)的吸附性能,同時(shí)建立了HA-Na-PMMA對Cr(Ⅵ)的等溫吸附模型,研究了其吸附熱力學(xué)和吸附動(dòng)力學(xué)。HA-Na-PMMA對Cr(Ⅵ)具有良好的吸附性能,其等溫吸附模型符合Freundlich模型。吸附焓變?yōu)?0.2849 k J/mol,ΔGθ0,所以吸附是自發(fā)的放熱反應(yīng)。常溫下吸附速率常數(shù)KL為0.9113 mg/(g·min),表明其吸附動(dòng)力學(xué)模型遵循Langmuir模型和Bingham模型。
[Abstract]:Using weathered coal in Qitai, Xinjiang as raw material, The graft copolymer of sodium humate and poly (methyl methacrylate) (HA-Na-PMMA) was prepared by surface initiated atom transfer radical polymerization (SI-ATRP) method. The optimum synthetic conditions of SI-ATRP were determined by orthogonal experiment: reaction time 8 h, cuprous bromide: bromine 8 h. The mass ratio of cupric to bipyridine is 20: 4: 20, the mass ratio of material to material is 1 g / 10 mL, the reaction temperature is 80 鈩，

本文編號：1958263