• Title/Summary/Keyword: the agriculture

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Preparation and Characterization of Hydrophobic Coatings from Carnauba Wax/Lignin Blends

  • BANG, Junsik;KIM, Jungkyu;KIM, YunJin;OH, Jung-Kwon;YEO, wanmyeong;KWAK, Hyo Won
    • Journal of the Korean Wood Science and Technology
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    • v.50 no.3
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    • pp.149-158
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    • 2022

  • To realize the infinite possibilities of materials derived from wood, it is necessary to overcome the weak moisture stability of wood. Thus, the development of an eco-friendly hydrophobic coating agent is essential, and of these, woody biomass-based materials are strongly attractive as coatings. In this study, eco-friendly hydrophobic wood coatings were prepared using carnauba wax purified from palm leaves and sprouts, and kraft lignin. The physicochemical properties of the carnauba wax/lignin blends according to the ratio of carnauba wax and lignin were observed by morphology and functional group change. In addition, the coating performance of carnauba wax/lignin blend coatings was confirmed by measuring the contact angle change. It was found that the addition of lignin could accelerate the atomization of wax particles, and that micro-roughness can be realized when applied to the actual wood surface, to ensure that the coating effect over time lasts longer. In addition, it was confirmed that the addition of lignin increases the hydrogen-bond-based interaction with the wood of the coating, thereby providing better coating stability and increasing the durability of the coating solvent under friction. The carnauba wax/lignin paint developed in this way is eco-friendly because all components are made of wood-based raw materials and have an excellent affinity with wood surfaces. Therefore, it is expected to be applicable to the coating process of wood-plastic composites and timber composites.

  • https://doi.org/10.5658/WOOD.2022.50.3.149 인용 PDF KSCI

Occurrence of Alternaria dianthi on Carnation in Korea (한국에서 카네이션에 발생하는 Alternaria dianthi)

  • Yu, Seung-Hun;Kang, Hi-Wan;Lee, Hyang-Burm;Kim, Hong-Gi
    • The Korean Journal of Mycology
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    • v.17 no.4
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    • pp.229-232
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    • 1989

  • A blight disease of carnation (Dianthus caryophyllus L.) caused by Alternaria dianthi was found in greenhouses and vinylhouses in southern Korea. In severely affected beds, many carnation plants were blighted and died. The growth of the fungus id vitro was optimum between 24 and $28^{\circ}C$. In controlled inoculations, A. dianthi caused lesions on leaves and stems of carnation plants.

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