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water-conducting Characteristics and Micro-dynamic Self-adjusting Behavior of Polyacrylamide/Montinorillonite coating

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Journal of Wuhan University of Technology(materials Science) 2015年第6期30卷 1191-1197页

作者：杜红梅张增志 WU Miaomiao ZHAO Jin Research Institute of Ecological and Functional materials China University of Mining & Technology(Beijing) Department of materials Science and Engineering China University of Mining & Technology(Beijing)

A water-conducting polyacrylamide/montmorillonite coating was prepared by *** coating was coated on fiber and then composited with polymer to form a composite film material that used for water saving and tree planting in arid and desert *** coating＇s water-conducting characteristics and dynamic self-adjusting behavior were investigated by Fourier transform infrared（FTIR）spectroscopy,thermal analysis（TG-DTA）,and environmental scanning electron microscopy（ESEM）.The results showed that the coating＇s water-conducting rate increased but water-retention capacity weakened with increasing montmorillonite *** water-loss rate was positively related to temperature and negatively related to soil *** potential greatly influenced the water-conducting rate of the coating during its water conduction *** the coating was at a low water potential,the montmorillonite particles interconnected and water was conducted quickly via montmorillonite layers,whereas when the coating was at a high potential,the montmorillonite particles disconnected and water was conducted slowly via the swelled polyacrylamide net *** rate can be regulated by changing the proportion of polyacrylamide and montmorillonite to guarantee a reasonable water supply for trees and make trees easier to ***,the survival rate of trees can be increased and the use of water resources can be significantly reduced.

关键词： desertification survival rate water saving composite material water potential coating

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