Wang Ke, Sun Xiaoyan, Long Bibo, Li Fayong, Yang Chong, Chen Junjia, Ma Chunping, Xie Dong, Wei Yen
Institute of Bioengineering and Guangdong Biomaterials Engineering Technology Research Center, Guangdong Academy of Sciences, Guangzhou 510316, China.
Department of Chemistry and the Tsinghua Center for Frontier Polymer Research, Tsinghua University, Beijing 100084, China.
ACS Omega. 2021 Nov 16;6(47):32327-32333. doi: 10.1021/acsomega.1c05725. eCollection 2021 Nov 30.
Biodegradable mulch films are supposed to be a prospective substitute for poly(ethylene)-based mulch films in the field of sustainable agriculture. Among them, weeding mulch films play significant roles. However, the large-scale production of weeding mulch films through the traditional high-temperature film blowing process would often cause serious pollution due to the diffusion of herbicides in the surroundings. Herein, a green and facile coating approach is developed to produce biodegradable weeding mulch films. In our strategy, a herbicide was added into a poly(vinyl alcohol) aqueous solution with dopamine in it. After the subsequent low-temperature coating procedure on a biodegradable poly(butylene adipate--terephthalate)/poly(lactic acid) film, effective weeding mulch films were obtained. The morphology, structure, and mechanical property test results revealed the robustness and stability of the coating, and the pot experiments clearly demonstrated the effective weed suppression ability of the obtained weeding films. Evidently, this strategy to produce biodegradable weeding mulch films is green and facile, exhibiting great prospects in the large-scale production of weeding mulch films and other functional biodegradable mulch films.
在可持续农业领域，可生物降解地膜有望成为聚乙烯基地膜的替代物。其中，除草地膜发挥着重要作用。然而，通过传统高温吹膜工艺大规模生产除草地膜时，由于除草剂在周围环境中的扩散，常常会造成严重污染。在此，我们开发了一种绿色便捷的涂层方法来生产可生物降解除草地膜。在我们的策略中，将一种除草剂添加到含有多巴胺的聚乙烯醇水溶液中。随后在可生物降解的聚（己二酸丁二醇酯-对苯二甲酸酯）/聚乳酸薄膜上进行低温涂层处理后，得到了有效的除草地膜。形态、结构和力学性能测试结果表明涂层具有坚固性和稳定性，盆栽实验清楚地证明了所得除草膜具有有效的除草能力。显然，这种生产可生物降解除草地膜的策略绿色便捷，在除草地膜和其他功能性可生物降解地膜的大规模生产中展现出巨大前景。
