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材料导报  2021, Vol. 35 Issue (22): 22193-22199    https://doi.org/10.11896/cldb.20090133
  高分子与聚合物基复合材料 |
基于原位浸渍法的酚醛树脂改性杉木木材研究
李萍1, 张源2, 吴义强2, 袁光明2, 李贤军2, 左迎峰2
1 中南林业科技大学家具与艺术设计学院,长沙 410004
2 中南林业科技大学材料科学与工程学院,长沙 410004
Study on Phenol Formaldehyde Resin Modified Chinese Fir Wood Based on In-situ Impregnation Method
LI Ping1, ZHANG Yuan2, WU Yiqiang2, YUAN Guangming2, LI Xianjun2, ZUO Yingfeng2
1 College Furniture and Art Design, Central South University of Forestry and Technology, Changsha 410004, China
2 College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004,China
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摘要 以苯酚、甲醛和氢氧化钠为改性剂,通过原位浸渍法对杉木木材进行了改性研究。探讨了浸渍压力、浸渍温度、浸渍时间和原位固化温度对改性杉木木材浸渍效果、强化效果和尺寸稳定效果的影响,并对改性杉木木材的化学结构、内部形貌、结晶结构和耐热性能进行了表征。结果表明,浸渍压力为0.5 MPa、浸渍温度为50 ℃、浸渍时间为32 h和原位固化温度为80 ℃时,改性杉木木材的浸渍效果、强化效果和尺寸稳定效果最佳。苯酚与甲醛在杉木木材中发生原位反应,既填充了杉木木材内部纹孔、细胞腔和细胞间隙,又与杉木木材中反应性羟基形成了氢键和化学键结合,从而有效提高了杉木木材的力学性能和耐水性能。酚醛树脂的浸入扰乱了杉木木材中纤维素结晶区定向排序良好的微纤丝,减弱了纤维素分子链的分子间作用,导致杉木木材中纤维素结晶度有一定程度降低。经过酚醛树脂原位浸渍改性后,改性杉木木材的耐热性能显著提高,可显著提高杉木制品的使用安全性。
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李萍
张源
吴义强
袁光明
李贤军
左迎峰
关键词:  杉木木材  酚醛树脂  原位浸渍法  强化  尺寸稳定化  热稳定性    
Abstract: Chinese fir wood was modified by in-situ impregnation method with phenol, formaldehyde and sodium hydroxide as modifiers. The effects of impregnation pressure, impregnation temperature, impregnation time and in-situ curing temperature on impregnation effect, strengthening effect and dimension stabilization effect of modified Chinese fir wood were discussed. And the chemical structure, internal morphology, crystalline structure and heat resistance of modified Chinese fir wood were characterized. The results showed that the modified Chinese fir wood had the best impregnation effect, strengthening effect and dimensional stability effect when the impregnation pressure was 0.5 MPa, the impregnation tempe-rature was 50 ℃, the impregnation time was 32 h and the in-situ curing temperature was 80 ℃. In-situ reaction of phenol and formaldehyde in Chinese fir wood not only fills the internal pits, cell cavities and cell interstices, but also forms hydrogen bonds and chemical bonds with reactive hydroxyl groups in Chinese fir wood, which effectively improved the mechanical properties and water resistance. The immersion of phenol formaldehyde resin disturbed the well-ordered microfibrils in the cellulose crystalline zone of Chinese fir wood, weakened the intermolecular interaction of cellulose molecular chains, and reduced the crystallinity to a certain extent. After in-situ impregnation modification with phenol formaldehyde resin, the heat resistance of modified Chinese fir wood was significantly improved, and the use safety of Chinese fir products was significantly improved.
Key words:  Chinese fir wood    phenol formaldehyde resin    in-situ impregnation    strengthen    dimensional stability    thermal stability
出版日期:  2021-11-25      发布日期:  2021-12-13
ZTFLH:  S781.7  
基金资助: 湖湘青年英才计划(2019RS2040);国家自然科学基金(31770606);湖南省科技重大专项(2017NK1010)和湖南省教育厅科学研究项目(17C1500)
通讯作者:  zuoyf1986@163.com   
作者简介:  李萍,中南林业科技大学,讲师。2020年毕业于中南林业科技大学,获得工学博士学位。主要从事木材功能性改良及应用研究。左迎峰,中南林业科技大学,副教授。2014年毕业于东北林业大学,获工学博士学位。同年加入中南林业科技大学材料科学与工程学院工作,主要从事木材功能性改良及生物质复合材料研究。
引用本文:    
李萍, 张源, 吴义强, 袁光明, 李贤军, 左迎峰. 基于原位浸渍法的酚醛树脂改性杉木木材研究[J]. 材料导报, 2021, 35(22): 22193-22199.
LI Ping, ZHANG Yuan, WU Yiqiang, YUAN Guangming, LI Xianjun, ZUO Yingfeng. Study on Phenol Formaldehyde Resin Modified Chinese Fir Wood Based on In-situ Impregnation Method. Materials Reports, 2021, 35(22): 22193-22199.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20090133  或          http://www.mater-rep.com/CN/Y2021/V35/I22/22193
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