Preparation and Water Retention Properties of Montmorillonite Modified by EL-10 Emulsifying Agent  

作　　者：渠永平 zhang zengzhi li cuilan 

机构地区：[1]Research Institute of Ecological and Functional Materials, China University of Mining and Technology(Beijing, Beijing 100083, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2017年第4期806-811,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National High-tech Research and Development Program of China(863 Program)(No.2001AA322100);the National Natural Science Foundation of China(No.50772131);the Main Project of Ministry of Education of China(No.106086);the Fundamental Research Funds for the Central Universities of China University of Mining and Technology(Beijing)(No.2012YJ05)

摘　　要：Aiming at the problem of available water conservation in desertification ecological restoration, we prepared the water retention materials with montmorillonite（MMT） modified by Castor Oil Polyoxyethylene Ether（10）（EL-10） emulsifying vegetable waxes. The water retention property was studied in simulated desertification climate, and the materials were analyzed and characterized by UV-Vis, SEM, FTIR and XRD measurements. Moreover, a UV carbon arc lamp was used to test the resistance to aging. The experimental results show that the emulsion has good dispersity. Both the water retention property and the aging resistance performance of the modified clay were excellent. The lamellar structure and chemical composition of MMT had no obvious changes before and after modification. The surfaces of clay particles were coated uniformly with modified MMT, so the loose clay particles were cemented together by vegetable waxes. Meanwhile, the original big hydrophilic pores between the clay particles turned into capillary hydrophobic pores. So the clay particles formed a bonding layer which could inhibit water evaporation. Grass-planting experiment showed that reasonable mass ratio of vegetable waxes and EL-10 was 1：18. The materials not only had great water retention property but also maintained sound air permeability so that the germination rate of grass seed significantly increased from 8% to 52%.Aiming at the problem of available water conservation in desertification ecological restoration, we prepared the water retention materials with montmorillonite（MMT） modified by Castor Oil Polyoxyethylene Ether（10）（EL-10） emulsifying vegetable waxes. The water retention property was studied in simulated desertification climate, and the materials were analyzed and characterized by UV-Vis, SEM, FTIR and XRD measurements. Moreover, a UV carbon arc lamp was used to test the resistance to aging. The experimental results show that the emulsion has good dispersity. Both the water retention property and the aging resistance performance of the modified clay were excellent. The lamellar structure and chemical composition of MMT had no obvious changes before and after modification. The surfaces of clay particles were coated uniformly with modified MMT, so the loose clay particles were cemented together by vegetable waxes. Meanwhile, the original big hydrophilic pores between the clay particles turned into capillary hydrophobic pores. So the clay particles formed a bonding layer which could inhibit water evaporation. Grass-planting experiment showed that reasonable mass ratio of vegetable waxes and EL-10 was 1：18. The materials not only had great water retention property but also maintained sound air permeability so that the germination rate of grass seed significantly increased from 8% to 52%.

关 键 词：castor oil polyoxyethylene ether（10）（EL-10） vegetable waxes montmorillonite modification water retention properties 

分 类 号：TB34[一般工业技术—材料科学与工程]