基于胺改性高岭石的新型阻垢剂抑制碳酸钙垢效果评估及机制  

Evaluation and mechanism of scale inhibition effect of new scale inhibitor based on amine modified kaolinite on calcium carbonate

作　　者：乔时轩 陈友媛[1,2,3] 李养沛 李佳兴 彭涛[4] 梁军 QIAO Shi-xuan;CHEN You-yuan;LI Yang-pei;LI Jia-xing;PENG Tao;LIANG Jun(College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China;Key Laboratory of Marine Environment and Ecology,Ministry of Education of China,Ocean University of China,Qingdao 266100,China;Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering,Ocean University of China,Qingdao 266100,China;China Institute of Geotechnical Investigation&Surveying,Beijing 100007,China)

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100 [2]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100 [3]中国海洋大学海洋环境与地质工程重点实验室,山东青岛266100 [4]建设综合勘察研究设计院有限公司,北京100007

出　　处：《应用化工》2023年第9期2519-2523,共5页Applied Chemical Industry

基　　金：国家重点研发计划课题(2018YFE0111300-3)。

摘　　要：对高岭石进行胺改性,并负载羧甲基环糊精,制备新型碳酸钙阻垢剂K-CD。通过Ca^(2+)滴定实验、静态阻垢实验、动态堵管实验、分子动力学模拟深入分析了K-CD的阻垢作用。结果表明,K-CD能够延缓碳酸钙的沉淀速率和沉淀时间,阻垢率达90%,比羧甲基-β-环糊精的效能高9.3%;分子动力学模拟表明,胺改性高岭石主要吸附作用面为(001),可吸引碳酸钙晶核,抑制Ca^(2+)与碳酸根的成核过程,并能够吸附至碳酸钙晶核的活性位点,使其晶格发生畸变,抑制了碳酸钙的聚集过程,达到了阻垢作用。A novel CaCO 3 scale inhibitor(K-CD)was successfully prepared by amine modification of kaolinite and loading carboxymethyl cyclodextrin onto the surface of kaolinite.The scale inhibition effect of K-CD was deeply analyzed by Ca 2+titration experiment,scale inhibition experiment,molecular dynamics simulation and quantum chemistry calculation.The results show that K-CD can decrease the precipitation rate and delay the occurrence of CaCO_(3) precipitation.Its scale inhibition efficiency is up to 90%,which is 9.3%higher than that of carboxymethyl cyclodextrin.Molecular dynamics simulations show that the main adsorption surface of amine modified kaolinite is(001)surface,which can attract calcium carbonate crystal nucleus.The nucleation process of Ca^(2+)and carbonate,attached onto the active site of calcium carbonate crystal nucleus,caused lattice distortion,inhibited the aggregation process of calcium carbonate,and achieved scale inhibition.

关 键 词：碳酸钙垢 绿色阻垢剂 晶体成核聚集 分子动力学模拟 

分 类 号：TQ085.412[化学工程]