豆渣苯酚液化物合成热固性酚醛树脂的研究

Study on synthesis of thermosetting PF resin with liquefied soybean dregs in phenol

为了提高大豆豆渣的附加值,利用豆渣苯酚液化物与甲醛在碱性环境中进行反应,制取热固性酚醛树脂(PF)。考察了n(甲醛)/n(液化物)[即n(F)/n(L)]比值、n(氢氧化钠)/n(液化物)[即n(NaOH)/n(L)]比值、树脂化温度和树脂化时间对PF理化性能的影响;通过正交实验法,确定了树脂化合成的最佳工艺。研究结果表明,最佳树脂化合成的工艺条件为:n(F)/n(L)=1.8,n(NaOH)/n(L)=0.5,树脂化温度为72.5℃,树脂化时间为3h;将最佳工艺条件下制取的PF用于胶合板的压制,则所得胶合板的胶合强度符合GB/T9846-2004中Ⅱ类胶合板的标准要求。

In order to enhance the additional value of soybean dregs, the thermosetting phenolic resin （PF） was prepared by reaction between liquefied soybean dregs with phenol and formaldehyde in the alkaline environment. The influences of molar ratio of formaldehyde to liquefier[namely n（F）/n（L）], molar ratio of NaOH to liquefier [namely n （NaOH）/n （L）], resinification temperature and resinifieation time were investigated on PF physical and chemical properties. The optimal resinification synthetic technics were determined by an orthogonal test plan. The research result indicated that the optimal resinification synthetic technics were obtained when n（F）/n（L） was 1.8, n（NaOH）/n（L） was 0.5, resinification temperature was 72.5 ℃ and resinification time was 3 h. The PF which was prepared at optimal technics condition was used for plywood, the bonding strength of plywood met request of GB/T 9 846-2004 （ Ⅱ） standard.