Synthesis and preservation performance of lanthanum-tannin complex from Cercis glabra Pampan

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2024-04-23 DOI:10.1016/j.ibiod.2024.105796

Weiqi Leng , Jingke Zhao , Minghao Wang , Jiayan Luo , Sheng He , Shengcheng Zhai , Jiangtao Shi , Islam Hafez , Xuefeng Zhang

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Abstract

This article explores the feasibility of rare earth element-tannin complexes as a wood preservative. The tannins (T) from Cercis glabra Pampan. are extracted, sulfonated (ST), and coordinated with lanthanum (La) elements to fabricate the complexes (La-T, and La-ST). Results show that two stable complexes, La-T and La-ST, are successfully formed by coordinating the La-ions with the phenolic hydroxyl groups in T and ST. Sulfonated tannins have a better adsorption capacity for lanthanum ions. The mass percentage of La in La-ST (36.50%) is higher than that in La-T (24.85%). The results of the white-rot decay test reveal that wood treated with La-T (1.98%) and La-ST (2.58%) preservatives has significantly lower weight loss rates compared to the untreated (28.94%). However, the brown rot decay test demonstrates that wood treated with La-T (62.68%) and La-ST (50.81%) only has slightly lower weight loss rates compared to the untreated (71.84%). Finally, the leaching of La-T and La-ST treated poplar wood was significantly lower than La self-treated ones. This novel approach can produce stable rare earth-wood preservatives and improve the wood's bio-durability and anti-leaching properties, thus remarkably enhancing the outdoor performance of modified wood products.

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从蕨类植物中提取的镧-单宁复合物的合成和防腐性能

本文探讨了稀土元素-单宁复合物作为木材防腐剂的可行性。提取、磺化（ST）蕨类植物中的单宁（T），并将其与镧元素（La）配位，制成络合物（La-T 和 La-ST）。结果表明，通过将 La 离子与 T 和 ST 中的酚羟基配位，成功地形成了两种稳定的络合物：La-T 和 La-ST。磺化单宁对镧离子有更好的吸附能力。La-ST 中 La 的质量百分比（36.50%）高于 La-T 中的质量百分比（24.85%）。白腐腐烂试验结果表明，使用 La-T（1.98%）和 La-ST（2.58%）防腐剂处理的木材的重量损失率明显低于未处理的木材（28.94%）。然而，褐腐腐烂试验表明，与未处理的木材（71.84%）相比，使用 La-T 防腐剂（62.68%）和 La-ST 防腐剂（50.81%）处理的木材的失重率仅略低。最后，La-T 和 La-ST 处理过的杨木的浸出率明显低于 La 自处理过的杨木。这种新方法可以生产稳定的稀土木材防腐剂，提高木材的生物耐久性和抗浸出性能，从而显著提高改性木制品的户外性能。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.