一种新型无机-有机硅铝复合絮凝剂的合成与表征  

Synthesis and characterization of a new inorganic-organosilicon-aluminum composite flocculant

作　　者：姚彬 张文存 张玉荣 王兰 YAO Bin;ZHANG Wen-cun;ZHANG Yu-rong;WANG Lan(Shaanxi Industrial Water Treatment Engineering Technology Research Center,Shaanxi Chemical Industry Research Institute Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]陕西化工研究院有限公司陕西省工业水处理工程技术研究中心,陕西西安710054

出　　处：《应用化工》2022年第3期759-763,共5页Applied Chemical Industry

基　　金：陕西省第二批“三秦学者”工业水处理工程技术创新团队[陕组通字(2020)45号]。

摘　　要：采用硅烷偶联剂γ-氨丙基三乙氧基硅烷作为硅源,与氯化铝在碱性条件下合成新型无机-有机硅铝复合絮凝剂。结果表明,最佳合成条件为:总铝浓度Al_(T)为0.2 mol/L,Si/Al摩尔比为0.6及碱化度B值为2.0时,合成的絮凝剂依然保持稳定状态。新型无机-有机硅铝复合絮凝剂的pH值与B值和Si/Al摩尔比均存在正相关性;Zeta电位与B值和Si/Al摩尔比均存在负相关性;絮凝剂中的有机组分和无机组分是以共价键结合在一起的;该絮凝剂呈现空间网状的密实结构,吸附架桥性能优越。A new inorganic-organic silicon-aluminum composite flocculant was synthesized by silane coupling agentγ-aminopropyltriethoxysilane and aluminum chloride under alkaline condition.The results show that the best synthetic conditions are as follows:the total aluminum concentration(Al_(T))is 0.2 mol/L,the molar ratio of Si/Al is 0.6 and the alkalization degree B value is 2.0.The pH value of the new inorganic-organic silicon-aluminum composite flocculant has positive correlation with B value and Si/Al molar ratio,and Zeta potential has negative correlation with B value and Si/Al molar ratio.The organic and inorganic components in the flocculant are bonded together by covalent bond,and the flocculant has a dense space network structure and excellent performance of adsorption and bridging.

关 键 词：絮凝剂 合成 Γ-氨丙基三乙氧基硅烷 硅烷偶联剂 表征 

分 类 号：TQ314[化学工程—高聚物工业] TQ253