Preparation and properties of hydrogel based on sawdust cellulose for environmentally friendly slow release fertilizers

被引：52
作者：
Zhang, Xiao [1 ]
Liu, Yanlu [1 ]
Lu, Panfang [1 ]
Zhang, Min [2 ]
机构：
[1] Shandong Agr Univ, Coll Chem & Mat Sci, Tai An 271018, Shandong, Peoples R China
[2] Shandong Agr Univ, Coll Resources & Environm, Natl Engn Lab Efficient Utilizat Soil & Fertilize, Natl Engn Res Ctr Slow Controlled Release Fertili, Tai An 271018, Shandong, Peoples R China
来源：
GREEN PROCESSING AND SYNTHESIS | 2020年 / 9卷 / 01期
基金：
国家重点研发计划;
关键词：
sawdust; slow-release nitrogen fertilizer; water absorbency; swelling behavior; release behavior; SUPERABSORBENT POLYMER; NITROGEN-FERTILIZER; SWELLING BEHAVIORS; WATER-RETENTION; NPK FERTILIZER; ACID-CO-ACRYLAMIDE); COMPOSITES; STARCH; ACID; FABRICATION;
D O I：
10.1515/gps-2020-0015
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A novel hydrogel slow-release nitrogen fertilizer based on sawdust with water absorbency was prepared using grafting copolymerization. Urea was incorporated as nitrogen source in a hydrogel fertilizer. Potassium persulfate (KPS) and N,N'-methylenebis acrylamide (MBA) were used as the initiator and cross-linker, respectively. The structure and properties of the samples were characterized by XPS, EDS, SEM, XRD and FTIR. The effects of various salt solutions, ionic strength and pH on swelling behavior were discussed. The results showed that the largest water absorbency of the sample reached 210 g/g in distilled water. In addition, the sample had the good nitrogen release property. Thus, the novel environmentally friendly hydrogel fertilizer may be widely applied to agricultural and horticultural fields.
引用
收藏
页码：139 / 152
页数：14
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