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酸/奇托桑粘合剂具有粘度控制,用于通过超分子自组装粘合木材
Lijian Cai1, Yutong Chen1, Zetan Lu1
1Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Northeast Forestry University, Harbin, PR China.
Carbohydrate polymers
|January 29, 2024
概括
一种新的酸/酸粘合剂为以石油为基础的木提供了一个可持续的,防水的替代品. 这种生物基粘合剂在合板,层状板和碎片板应用中表现出优越的强度.
科学领域:
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
- 木材科学 木材科学 木材科学
背景情况:
- 传统的木材粘合剂,如尿素甲,胺-尿素甲和树脂,是从石油中衍生而来的,并引起了环境问题.
- 现有的生物基粘合剂经常受到复杂的制造工艺,不一致的粘度和不充分的耐水性的影响.
- 作为木制品行业的替代品,对可持续的,高性能的生物基粘合剂有很大的需求.
研究的目的:
- 开发一种新的,可持续的,高性能的生物基木材粘合剂.
- 设计一种具有可控粘度和增强耐水性的酸/奇托桑粘合剂.
- 为了评估粘合剂在制造各种木制品中的性能,如合板,层 Veneer 木材和碎片板.
主要方法:
- 在室温下采用了一步溶解方法,利用超分子自我组装策略.
- 酸和奇托被结合起来,制造出生物基粘合剂配方.
- 这种粘合剂应用于贴面和木材颗粒 (细木和粗木) 上,用于制造不同的木制产品.
主要成果:
- 开发的酸/酸粘剂表现出受控的粘度和改善的耐水性.
- 用这种粘合剂粘合的合板样本显示干切削强度为2.1 MPa,湿切削强度为1.1 MPa,超过了中国国家标准 (GB/T 9846-2015,≥0.7 MPa).
- 成功地制造了合板,层状板和碎片板,这表明了广泛的适用性.
结论:
- 酸/奇托桑粘合剂是传统木材粘合剂的有希望的,可持续的替代品.
- 超分子自我组装策略使得创建一个室温,一个阶段的粘合剂具有理想的特性.
- 粘合剂的性能归因于与木细胞壁部件的机械互锁和交叉连接.
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