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改性聚乙烯基酒精基双层涂层控制释放酸肥的释放和降解机制

Teng Sun¹, Dekang Zhan¹, Xiangzhu Wang¹

¹Laboratory of Green & Smart Chemical Engineering in Universities of Shandong, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.

|April 27, 2024

概括

这项研究开发了一种新的生物降解聚合物薄膜,使用经过修改的聚乙醇,聚乙烯利和酸盐与生物炭合,用于控制释放酸盐肥料. 新的膜增强了肥料的寿命和生物降解性.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
农业科学农业科学

背景情况:

控制释放肥料 (CRF) 对于高效的营养提供和环境保护至关重要.
提高CRF薄膜材料的缓释性能和生物降解性仍然是一个关键的挑战.
开发可持续和环保的替代传统化肥是一种持续的研究重点.

研究的目的:

开发一种新的以水为基础的可生物降解聚合物薄膜,用于控制释放酸肥料 (CRPF).
为了提高CRF薄膜材料的缓释性能和生物降解性.
为了研究生物炭 (BC) 和酸盐 (CTS) 对改性聚乙醇 (PVA) 和聚乙烯 (PVP) 薄膜的特性的影响.

主要方法:

用BC和CTS (PVA/PVP-CTS_aBC_b) 添加剂的修饰PVA/PVP薄膜的制备.
使用应力-张力测试,SEM,FTIR,XRD和TGA进行薄膜性质的表征.
用PVA/PVP-CTS_8%BC_7%作为薄膜涂层对CRPF的控制释放性能和生物降解性的评估.

主要成果:

添加CTS提高了PVA/PVP膜的应力和耐水性.
生物炭 (BC) 的添加增加了结晶性,减少了断裂延长,提高了生物降解性.
在PVA/PVP-CTS_8%BC_7%膜上,28日释放率为30%,120天后降解率为35%.
控制释放CRPF的使用寿命显著延长.

结论:

开发的PVA/PVP-CTS_8%BC_7%膜为CRPF提供了改进的缓释性能和增强的生物降解性.
CTS和BC的组合有效地改变了用于农业应用的聚合物薄膜特性.
这项研究为在CRF中应用水性可降解聚合物材料提供了有价值的数据.

关键词:

生物炭使用的兴奋剂可生物降解性生物降解性有控制释放的释放.双层薄膜是一种双层薄膜.酸盐肥料酸盐肥料是一种聚乙烯酒精的使用情况

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