Journal
CHEMICAL ENGINEERING JOURNAL
Volume 422, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.129499
Keywords
Green agriculture; Plant-wearable hydrogel; Self-powered system; Light fertilizer; Plant sensor; Smart farming
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This study introduces a versatile double-network hydrogel that can be used as a clean energy harvesting device, supercapacitor, and sensor. The material demonstrates significant improvements in mechanical stress and stretchability, showing great potential in modern agriculture systems.
Significant energy is consumed to produce the highest-yielding agriculture, which increases greenhouse gas emission and leads to climate change. Smart farming is expected to allow to enhance efficiency and sustainability via site-specific monitoring and managing of crops. This study is a first of its kind development of versatile double-network hydrogel that can serve as: 1) a clean energy harvesting device for self-powered light fertilizer for plants, 2) a supercapacitor for energy storage, 3) plant growth sensor, and 4) an ammonia sensor. Polyacrylic acid double-networked with the conductive nanofiller reduced graphene oxide and then coated with polyaniline are incorporated with double networking (PAA-RGO-PANI, PRP) that significant improved mechanical stress from 300 KPa to 1050Kpa. The excellent stretchability (650%) and strength makes it suitable for agriculturepurposed plant-wearable senor that satisfies the plant growth. The electrical performance of the triboelectric energy harvester (PRP-TENG) provides high power density at 424 mW/m2 from sound wave, wind, and mechanic pressure. The PAA-RGO-PANI supercapacitor can maintain a stable capacitance at 2330 mF cm-2 after 5000 cycles. The self-powered system combined with PRP-TENG and supercapacitor shows great potential in modern agriculture system.
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