College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, Liaoning, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, Liaoning, China; Key Laboratory of Arable Land Conservation (Northeast China), Ministry of Agriculture, Shenyang 110866, Liaoning, China.
College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, Liaoning, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, Liaoning, China; Key Laboratory of Arable Land Conservation (Northeast China), Ministry of Agriculture, Shenyang 110866, Liaoning, China.
Carbohydr Polym. 2020 Apr 15;234:115925. doi: 10.1016/j.carbpol.2020.115925. Epub 2020 Jan 27.
Inorganic matter modifications were used to improve the hydrophobic properties and slow-release effects of water-based copolymer films. Water-based copolymers were prepared by aqueous polymerization of polyvinyl alcohol, starch, chitosan, and sodium carboxymethyl cellulose, and then, zeolite powder, volcanic ash or biochar were added to prepare the inorganic matter modified water-based copolymer films. The results showed that the inorganic matter modified water-based copolymer films had enhanced thermal stability, reductions in O-H and water vapour permeability, and increased crystallinity and roughness. Compared with water-based copolymer films, the water absorption capacities of the zeolite powder modified water-based copolymer films, volcanic ash modified water-based copolymer films, and biochar modified water-based copolymer films were reduced by 42.8 %, 50.0 % and 39.0 %, and their ammonium permeability was reduced by 53.0 %, 12.1 % and 1.1 %, respectively. Inorganic matter modified water-based copolymer films have properties that make them suitable for use in preparing slow-release coating materials.
采用无机物改性的方法，改善了水基共聚物薄膜的疏水性和缓释效果。以聚乙烯醇、淀粉、壳聚糖和羧甲基纤维素钠为原料，通过水溶液聚合制备水基共聚物，然后加入沸石粉、火山灰或生物炭，制备无机物改性的水基共聚物薄膜。结果表明，无机物改性的水基共聚物薄膜的热稳定性增强，O-H 和水蒸气透过率降低，结晶度和粗糙度增加。与水基共聚物薄膜相比，沸石粉改性水基共聚物薄膜、火山灰改性水基共聚物薄膜和生物炭改性水基共聚物薄膜的吸水率分别降低了 42.8%、50.0%和 39.0%，铵透过率分别降低了 53.0%、12.1%和 1.1%。无机物改性的水基共聚物薄膜具有适合制备缓释包衣材料的性能。
