Process Behavior and Application of Dynamic Self-adjusting Water-transferring composite coat-中国材料进展

文章信息/Info

作者:: Zhang Zengzhi; Zhang Limei; Zhao Jin; Li Genzhu; Research Institute of Ecological and Functional Materials, China Univ. of Mining and Technology (Beijing),

关键词:: water-transferring coat; water potential; water saving and planting; desertification controlling

摘要:: A kind of water-transferring composite used for water saving and planting in desertification controlling was prepared. It was composed of different proportions of polyacrylamide solutions and montmorillonite then coated on fibre. The micro-appearance of the coated fibre and the micro-structure of the coat were described by scanning electron microscope. The water desorption characteristics of the coat were detected by thermo-gravimetry. The water-transferring capabilities of the coated fibre with various soil moistures were analyzed by rapid moisture meter. The results show that montmorillonite grains disperse throughout the branches of polyacrylamide. Water transfer rate is determined by spatial continuity of the grains which is caused by dominant action of polyacrylamide on montmorillonite under different water potentials of the coat .The rate increases with soil moisture decreasing. The survival rate gets higher when the coat is applied to Picea asperata Mast. Self-adjustment of the composite coat to soil moisture provides appropriate water to plants.