National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University , Tai'an, Shandong 271018, China.
Department of Soil and Water Science, Tropical Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida , Homestead, Florida 33031, United States.
ACS Appl Mater Interfaces. 2017 May 10;9(18):15868-15879. doi: 10.1021/acsami.7b02244. Epub 2017 Apr 28.
The development of efficient biobased controlled-release fertilizers has captured much research attention because of the environmental concerns and food scarcity problems. In this work, a biomimetic superhydrophobic biobased polyurethane-coated fertilizer (SBPF) was successfully fabricated by increasing surface roughness and reducing surface energy of polyurethane (PU) coating. The green PU coating was synthesized from low-cost, biodegradable, and renewable cottonseed oil. The nutrient release longevity of SBPF revealed 2-fold enhancement compared with the normal biobased PU-coated fertilizer (BPF). The significant improvement of nutrient release characteristics can be attributed to the atmosphere "outerwear" which ensured the nonwetting contact of water with superhydrophobic surfaces in gas state instead of in liquid state. The new concept introduced in this study can inform the development of the next generation of biobased controlled release fertilizers.
由于环境问题和粮食短缺问题，高效的生物基控释肥料的开发引起了广泛的研究关注。在这项工作中，通过增加表面粗糙度和降低聚氨酯（PU）涂层的表面能，成功制备了仿生超疏水生物基聚氨酯涂层肥料（SBPF）。绿色的 PU 涂层是由低成本、可生物降解和可再生的棉籽油合成的。与普通的生物基聚氨酯涂层肥料（BPF）相比，SBPF 的养分释放寿命延长了 2 倍。养分释放特性的显著改善归因于大气“外衣”，它确保了在气体状态下，水与超疏水表面的非润湿接触，而不是在液体状态下。本研究中引入的新概念可以为下一代生物基控释肥料的开发提供信息。
