合成工艺对热解油改性酚醛树脂老化性能影响  

Effects of synthesis technology on aging performance of phenol-formaldehyde resin modified by bio-oil

作　　者：虞宇翔 徐平平 邢靖晨 常建民[1] YU Yuxiang;XU Pingping;XING Jingchen;CHANG Jianmin(College of Wood Science and Technology, Beijing Forestry University, Beijing 100083, China)

机构地区：[1]北京林业大学材料科学与技术学院,北京100083

出　　处：《化工进展》2019年第3期1530-1537,共8页Chemical Industry and Engineering Progress

基　　金：泰山学者优势特色学科人才团队(2015162);北京市科委项目(Z161100001316004)

摘　　要：利用热解油部分替代苯酚改性酚醛(PF)树脂,旨在改善树脂韧性和耐水性,从而提高树脂老化性能。b本文利用紫外光老化仪,研究了热解油替代苯酚比例、氢氧化钠(NaOH)添加量(占苯酚质量比)和反应温度对热解油改性酚醛(BPF)树脂老化性能的影响,考察了不同合成工艺制备的BPF树脂胶合板和胶膜随老化时间的胶合强度和表观构造变化,利用傅里叶红外光谱(FTIR)和固体核磁共振(NMR)分析了BPF树脂的老化行为。研究结果表明,胶合强度损失率和树脂胶膜表观结构老化程度,随着热解油替代苯酚比例和反应温度的增大而减小;随着NaOH添加量的增多,胶合强度损失率变化不大,但胶膜表观结构老化程度先减小后增大。FTIR和13C NMR分析得出,老化960h后树脂的亚甲基和醚键峰强减小,醛、酮和羧酸等含氧官能团的峰强增大。Bio-oil was added as a substitute of phenol for phenol-formaldehyde (PF) resin to enhance the toughness and water resistance, thus improving the aging performance. The effects of the substitute rate of bio-oil to phenol, addition of sodium hydroxide (NaOH) and reaction temperature on the aging performance of bio-oil phenol-formaldehyde (BPF) resin were examined using UV weathering. The variations on bonding strength of plywood and microstructure of cured resin were measured. The changes in the chemical structure of cured BPF resin were analyzed by the Fourier transform infrared spectroscopy (FTIR) and solid-state nuclear magnetic resonance (NMR) to understand the aging behavior of BPF resin. Results showed that the decrease rate of bonding strength of plywood and aging degree of cured resin were reduced with the increase of the substitute rate of bio-oil to phenol and reaction temperature. As the growing addition of NaOH, the decrease rate of bonding strength changed little, but the aging degree of cured resin decreased first then increased. After aging 960h, the peak strength of methylene and ether bonds decreased, while the peak strength of aldehyde, ketone and carboxyl acids increased.

关 键 词：合成工艺 热解油 酚醛树脂 老化性能 

分 类 号：TQ322[化学工程—合成树脂塑料工业]