Preparation of urea-containing starch-castor oil superabsorbent polyurethane coated urea and investigation of controlled nitrogen release

被引：47

作者：

Zhao, Chenhao ^{[1
,2
,3
]}

Tian, Hongyu ^{[1
]}

Zhang, Qiang ^{[3
]}

Liu, Zhiguang ^{[1
,3
]}

Zhang, Min ^{[1
,3
]}

Wang, Jun ^{[4
]}

机构：

[1] Shandong Agr Univ, Coll Recourses & Environm, Natl Engn Lab Efficient Utilizat Soil & Fertilize, Tai An 271018, Shandong, Peoples R China

[2] Yangzhou Univ, Coll Environm Sci & Engn, Yangzhou 225127, Jiangsu, Peoples R China

[3] Kingenta Ecol Engn Grp Co Ltd, State Key Lab Nutr Resources Integrated Utilizat, Linshu 276700, Peoples R China

[4] Taian Soil & Water Conservat Ecol Environm Monito, Tai An 271018, Shandong, Peoples R China

来源：

CARBOHYDRATE POLYMERS | 2021年 / 253卷

关键词：

Composite coating; Starch based superabsorbent polymer; Superabsorbent polyurethane; Urea; Controlled release fertilizer;

D O I：

10.1016/j.carbpol.2020.117240

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

With the aim of improving water absorption and controlled release performance of current controlled release fertilizers, a novel composite coating method for superabsorbent-polyurethane coated urea (SAPCU) was developed. Superabsorbent-polyurethane (SAPU) composite coating material was successfully formed through an insitu reaction, where castor oil polyurethane (COP) and superabsorbent polymer (SAP) were connected through urethane bonds with an optimal reaction ratio of SAP and PAPI as 2.5:1 (w w(-1)). The ideal nitrogen release and water absorption characteristics of SAPCU were achieved by adjusting the amount of COP and SAPU. The SAPCU had a high total nitrogen content (40.23-42.14 %), large swelling ratios (120-160 g water/g SAPU), and long nitrogen release period (60-150 days).

引用

页数：9

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