Polysiloxane-consisting wood coating with photodynamic mold resistance

IF 2.4 3区农林科学 Q1 FORESTRY

European Journal of Wood and Wood Products Pub Date : 2025-01-13 DOI:10.1007/s00107-024-02195-8

Mrudul Velhal, Abhishek Kumar, Yaqoob Ali, Amrutha Dinesh, Shiren Wang, Hong Liang

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引用次数: 0

Abstract

Mold is a common cause of degradation and decay of wood furniture and structures, leading to health risks and loss of aesthetics. Several coating methods have been developed to bestow mold resistance to wood surfaces. However, few studies have utilized photodynamic inactivation (PDI) as the mold inhibition mechanism for wood coatings. In this study, a polysiloxane-based coating incorporated with Rose Bengal Lactone (RBL) as a photosensitizer was developed on poplar woods at loadings of 0.1, 0.2, and 0.4 mg ml^− 1. The polymeric coating was hydrophobic, with the highest water contact angle of 128.20° and demonstrated resistance to scratches during handling. The anti-mold performance was tested against the soft-rot fungus Chaetomium globosum. The polymer-coated wood samples were incubated with and without light irradiation. The dark cultures showed growth inhibition on the coated surface due to surface hydrophobicity and smoothness. Following irradiation by green light at 530 nm, complete inhibition of mold growth was observed at the end of two weeks at coating loadings above 0.2 mg ml^− 1. The photodynamic activity of the coating under visible light exposure was observed to be stable even after a period of 3 months. The coating developed here offers a viable solution for anti-mold applications under common lighting conditions.

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含聚硅氧烷的木材光动力防霉涂料

霉菌是木质家具和结构退化和腐烂的常见原因，导致健康风险和美学损失。已经开发了几种涂层方法来赋予木材表面抗霉菌性。然而，很少有研究利用光动力失活（PDI）作为木器涂料的抑霉机制。在这项研究中，在白杨木上以0.1、0.2和0.4 mg ml−1的负荷开发了一种含有玫瑰孟加拉内酯（RBL）作为光敏剂的聚硅氧烷基涂层。聚合物涂层具有疏水性，最高水接触角为128.20°，并且在处理过程中具有抗划伤性。对其对软腐菌毛毛菌的抑霉性能进行了试验。在光照和不光照条件下对涂覆聚合物的木材样品进行孵育。由于表面的疏水性和光滑性，暗培养物在涂覆表面表现出生长抑制作用。在绿光照射530 nm后，在两周结束时，当涂层负荷大于0.2 mg ml−1时，观察到霉菌生长完全受到抑制。在可见光照射下，涂层的光动力学活性即使在3个月后也保持稳定。这里开发的涂层为普通照明条件下的防霉应用提供了可行的解决方案。

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来源期刊

European Journal of Wood and Wood Products 工程技术-材料科学：纸与木材

CiteScore

5.40

自引率

3.80%

发文量

124

审稿时长

6.0 months

期刊介绍： European Journal of Wood and Wood Products reports on original research and new developments in the field of wood and wood products and their biological, chemical, physical as well as mechanical and technological properties, processes and uses. Subjects range from roundwood to wood based products, composite materials and structural applications, with related jointing techniques. Moreover, it deals with wood as a chemical raw material, source of energy as well as with inter-disciplinary aspects of environmental assessment and international markets. European Journal of Wood and Wood Products aims at promoting international scientific communication and transfer of new technologies from research into practice.