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开发可行的聚类型的聚 (?? 乙烯醇) 一次性粘合剂,具有高耐水性和粘合性能.
Dandan Xu1, Chunyin Li2, Yuchen Zhou1
1College of Chemistry and Material Engineering, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China.
Langmuir : the ACS journal of surfaces and colloids
|November 21, 2024
概括
环境友好的聚乙醇 (PVA) 粘合剂在木材应用中得到了改进. 一种新的交联PVA (CPVA) 粘合剂表现出增强的防水和防性,符合国家木材复合材料标准.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 粘合剂技术 技术 粘合剂技术
背景情况:
- 聚乙醇 (PVA) 是一种水溶性聚合物,有可能成为环保粘合剂.
- 目前的PVA粘合剂在防水和防性方面存在局限性,这限制了它们在木材行业的使用.
研究的目的:
- 开发一种新的聚类型PVA粘合剂 (CPVA),其粘合性,防水性和防性得到改善.
- 评估CPVA作为一种可持续替代形式基木材粘合剂的性能.
主要方法:
- 通过与酸 (CA) 交叉链接PVA合成CPVA.
- 使用富里埃变换红外光 (FTIR) 和X射线光电子谱学 (XPS) 进行交联反应的表征.
- 粘合性质的评估,包括水溶性,粘合强度 (干燥,温水,热水) 和对各种基质的粘合.
主要成果:
- 通过FTIR和XPS证实了CPVA的交联结构.
- CPVA1 (1:1 CA/PVA比) 的水溶性较低 (浸泡24小时后5%).
- 用CPVA1粘合的合板符合中国国家木材粘合剂标准GB/T 9846-2015,其强度为1.06 MPa (干燥),1.52 MPa (热水) 和1.45 MPa (热水).
- 此外,CPVA在室温下对玻璃和钢具有粘附性.
结论:
- 合成的CPVA粘合剂具有出色的粘合强度,耐水性和防性.
- CPVA为木制复合材料提供了一个有前途的非甲替代品.
- 这种发展有助于创造更可持续,更耐用的木制品.
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