新型酚醛树脂改性大豆蛋白基胶黏剂的研究

doi:10.3969/j.issn.0253-2417.2016.01.017

林产化学与工业 ›› 2016, Vol. 36 ›› Issue (1): 119-126.doi: 10.3969/j.issn.0253-2417.2016.01.017

新型酚醛树脂改性大豆蛋白基胶黏剂的研究

吴志刚^1,2, 杜官本^1,2, 雷洪², 王辉², 席雪冬², 曹明², 廖晶晶²

1. 北京林业大学材料科学与技术学院, 北京 100083;
2. 西南林业大学;云南省木材胶黏剂及胶合制品重点实验室, 云南昆明 650224

收稿日期:2014-12-05 出版日期:2016-02-25 发布日期:2016-03-18
通讯作者: 杜官本,教授,博士生导师,主要从事木材胶黏剂、木质复合材料和木材表面处理等研究;E-mail:guanben@swfu.edu.cn。 E-mail:guanben@swfu.edu.cn
作者简介:吴志刚(1986-),男,江西宜春人,博士生,研究方向为木材胶黏剂与木质复合材料
基金资助:
林业公益性行业科研专项(201304505);"十二五"国家科技支撑计划资助(2012BAD24B03);云南省中青年学术带头人后备人才项目资助(2011HB024)

Modification of Soy Protein-based Adhesives by a New Phenol Formaldehyde Resin

WU Zhi-gang^1,2, DU Guan-ben^1,2, LEI Hong², WANG Hui², XI Xue-dong², CAO Ming², LIAO Jing-jing²

1. College of Matericals Science and Technology, Beijing Forestry University, Beijing 100083, China;
2. Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products;Southwest Forestry University, Kunming 650224, China

Received:2014-12-05 Online:2016-02-25 Published:2016-03-18

摘要/Abstract

摘要： 以脱脂大豆粉为原料制备大豆蛋白基胶黏剂(豆胶,S),以普通甲醛制备的酚醛树脂(PF₁)和高浓度甲醛制备的酚醛树脂(PF₂)为交联剂,使用前将两者直接混合得酚醛树脂改性豆胶(PF₁/S、PF₂/S)。利用差示扫描量热(DSC)、红外光谱(FT-IR)、动态热机械性能(DMA)和核磁共振碳谱(¹³C NMR)分析对产品性能进行了测试与表征。结果表明:等物质的量之比条件下,高浓度甲醛较之普通甲醛制备的酚醛树脂改性豆胶胶合板干、湿剪切强度分别提高4.3%和11.6%,并且强度稳定性好;动态DSC分析表明,PF₂可以降低豆胶体系的固化温度和活化能,与豆胶的交联反应较容易;¹³C NMR分析表明,PF₂体系羟甲基达88.73%,明显高于PF₁的80.91%;FT-IR分析证实酚醛树脂与豆胶中的氨基发生反应,并且PF₂反应效率更高;DMA分析表明,PF₂/S能够改善胶合产品的力学性能和热稳定性,降低豆胶的固化反应起始温度,提高固化反应速率。

关键词: 高浓度甲醛, 酚醛树脂, 豆胶, 固化性能

Abstract: Soy-based adhesive (S) was prepared by use of defatted soy flour as feedstock, and new phenol formaldehyde resins were synthesized by using common formaldehyde and high concentration formaldehyde (PF₁, PF₂) as crosslinker agent.S and PF₁, or PF₂ were then directly blended to form the modified S.The structure and the performance of these adhesives were subsequently characterized by differential scanning calorimetry (DSC), infrared spectrum (FT-IR), dynamic thermal mechanical properties (DMA) and nuclear magnetic resonance (¹³C NMR), respectively.It was found that with the same molar ratio, plywood of S crosslined by PF₂ showed better bonding performance and strength stability.Their dry and wet strengths increased by nearly 4.3% and 11.6% compared with those crosslined by PF₁, respectively.Dynamic DSC analysis showed that PF₂ was easy to react with S by decreasing the activation energy of adhesives system.¹³C NMR showed that the hydroxymethyl content PF₂ system was 88.73%, which was significantly higher than the 80.91% of PF₁.FT-IR analysis confirmed that the phenol formaldehyde resin reacted with amino of S, and PF₂ showed much more efficient than PF₁.The DMA results showed that PF₂ could improve the mechanical performance and thermal stability of the final product, reduce the onset curing temperature and curing temperature, and accelerate the curing reaction rate of modified S.

Key words: high concentration formaldehyde, phenol formaldehyde resin, soy-based adhesive, curing performance

中图分类号:

TQ35

吴志刚, 杜官本, 雷洪, 王辉, 席雪冬, 曹明, 廖晶晶. 新型酚醛树脂改性大豆蛋白基胶黏剂的研究[J]. 林产化学与工业, 2016, 36(1): 119-126.

WU Zhi-gang, DU Guan-ben, LEI Hong, WANG Hui, XI Xue-dong, CAO Ming, LIAO Jing-jing. Modification of Soy Protein-based Adhesives by a New Phenol Formaldehyde Resin[J]. Chemistry and Industry of Forest Products, 2016, 36(1): 119-126.

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新型酚醛树脂改性大豆蛋白基胶黏剂的研究

Modification of Soy Protein-based Adhesives by a New Phenol Formaldehyde Resin

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