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Description: An emerging demand for high-yielding in agricultural productions calls for higher consumptions of energy and synthetic fertilizers, which lead to increased greenhouse gas emissions and water/soil pollutions. Smart farming provides promising solutions to alleviate these problems by enabling site-specific managing and monitoring of crops. Here, we design a smart-farming system composed of a novel multifunctional double-network hydrogel. This hydrogel can be developed into 1) a clean energy harvesting device (a triboelectric nanogenerator) for a self-powered LED lighting system, 2) a supercapacitor for energy storage, 3) a plant growth sensor, and 4) an ammonia sensor. The double-network hydrogel is composed of polyacrylic acid and conductive reduced graphene oxide, and coated with polyaniline (PAA-RGO-PANI). The hydrogel exhibits remarkable stretchability (650%) and mechanical strength (1050 kPa), satisfying the requirements of for plant growth sensors. Triboelectric nanogenerators made from the hydrogel shows clean energy harvesting potential, which provides high power density at 424 mW/m2 from sound wave, wind, and mechanic pressure. The supercapacitor can be stable at 2330 mF/cm2 after 5000 charge?discharge cycles. This self-powered smart farming system shows great potential in natural resource utilization and plant management in modern agriculture.

Keywords: Smart farming, Plant-wearable hydrogel, Self-powered system, Plant sensor
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Date: 2023-07-23
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Conference name: CSBE/SCGAB 2023 Annual Conference, Lethbridge, Alberta, 23-26 July 2023.
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Type: Poster
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Publication type: Text.Abstract
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Coverage: North_America
Language 1: en
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Rights: Canadian Society for Bioengineering
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