A novel wheat straw cellulose-based semi-IPNs superabsorbent with integration of water-retaining and controlled-release fertilizers

作者：Li Xiaodi; Li Qian^*; Su Yuan; Yue Qinyan; Gao Baoyu; Su Yi

来源：Journal of the Taiwan Institute of Chemical Engineers, 2015, 55: 170-179.

DOI：10.1016/j.jtice.2015.04.022

• Wheat straw
• Semi-IPNs
• Slow release
• Water absorbency
• Fertilizer

A novel semi-interpenetrating polymer networks (semi-IPNs) superabsorbent resin with slow-release nitrogen and phosphorus fertilizer (WSC-g-PAA/PVA/NP), based on wheat straw cellulose-g-poly poly (acrylic acid) (WSC-g-PAA) network and linear polyvinyl alcohol (PVA) was prepared by solution polymerization. Urea and dipotassium hydrogen phosphate were introduced to supply nitrogen and phosphorus nutrients, respectively. The novel semi-IPNs SAR was characterized by methods of FTIR, SEM and TGA. The water absorbency under different conditions and the slow-release behavior of WSC-g-PAA/PVA/NP were studied. The semi-IPNs SAR synthesized under optimized condition not only showed excellent water absorbency of 198.5 g/g in distilled water and 26.3 g/g in 0.9 wt% NaCl solution, but also could significantly lessen the leaching losses of fertilizers and enhance the water-retention capacity of soil. It could be concluded that the product with water holding and slow-release property, being economical and friendly to environment, had great potential to be used in agriculture and horticultural.

• 出版日期2015-10
• 单位山东财经大学; 山东大学