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Coatings 2018, 8(2), 64; https://doi.org/10.3390/coatings8020064

Application of Graphene-Oxide-Modified Polyacrylate Polymer for Controlled-Release Coated Urea

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
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Received: 18 December 2017 / Revised: 3 February 2018 / Accepted: 5 February 2018 / Published: 8 February 2018
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Abstract

Polyacrylate polymer (PA) was modified with graphene oxide (GO) and the obtained composites were applied as coatings for controlled-release coated urea (CRU). The physicochemical properties of the different PA/GO coatings were characterized in detail and the nitrogen-release characteristics of the obtained CRU samples were determined in water at 25 °C. The experimental results revealed that addition of GO to PA reduced the swelling degree from 83.01% to 46.35% and improved its mechanical properties (the Young’s modulus was improved from 31.52 to 34.97 MPa and the glass transition temperature was increased from 4.21 to 6.11 °C), thus dramatically slowing down the cumulative nutrient release from the CRU fertilizer from 87.25% to 59.71%. These results suggest that GO enhances the properties of PA for CRU applications, which shows that GO-modified PA is a good coating material. View Full-Text
Keywords: polyacrylate polymer; graphene oxide; controlled-release coated urea; physical blending method polyacrylate polymer; graphene oxide; controlled-release coated urea; physical blending method
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Yuan, W.; Shen, Y.; Ma, F.; Du, C. Application of Graphene-Oxide-Modified Polyacrylate Polymer for Controlled-Release Coated Urea. Coatings 2018, 8, 64.

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