writer：Kaihao Wang, Dan Meng, Shuheng Wang, Jun Sun, Hongfei Li, Xiaoyu Gu, Sheng Zhang
keywords：植酸浸渍去木质素的木材显著提高木材阻燃性能
source：期刊
specific source：Industrial Crops and Products
Issue time：2022年

Introducing bio-based acid sources into the cellulose lumens is an effective way to enhance the flame retardant of wooden products. The wood was delignified at first and then phytic acid (PA) was adsorbed solely into the vessels of the wood. With only 8.0 wt% addition of PA, the highly flame retardant wood was obtained. The limiting oxygen index (LOI) of the treated sample was reached 37.2%, the sample also passed the V-0 grade in the UL-94 vertical burning test, and in the CONE test, the total heat release was reduced by 71.3% compared to that of the Natural wood sample. The flame retardant mechanism was probed and summarized as capture of the flaming radicals, the synergistic promotion on charring and suppression on heat and smoke release. After hot-pressing, the flame-retardant treated wood sample exhibited much enhanced mechanical properties, its tensile strength went up to 138 MPa and its bending strength reached 213 MPa, which are 6 times and 7.8 times higher than that of the Natural wood, respectively. This work provided a simple and environmental-friendly method to prepare flame retardant wood for furniture applications.

在纤维素管腔中引入生物基酸源是增强木制品阻燃的有效途径。木材首先被脱木素，然后植酸 (PA) 被单独吸附到木材的血管中。仅添加 8.0 wt% PA，即可获得高度阻燃的木材。处理后样品的极限氧指数（LOI）达到37.2%，样品在UL-94垂直燃烧测试中也通过了V-0级，在CONE测试中，总放热量相比降低了71.3%到天然木材样品。对阻燃机理进行了探索和总结，包括对燃烧自由基的捕获、协同促进炭化和抑制放热释烟。热压后，经过阻燃处理的木材样品表现出显着增强的机械性能，其抗拉强度达到138 MPa，弯曲强度达到213 MPa，分别是天然木材的6倍和7.8倍。这项工作为制备家具用阻燃木材提供了一种简单且环保的方法。