杨木粉液化产物及其树脂制备工艺  

Preparation technology of poplar wood powder and its resin

作　　者：储呈浩 孙丰文[1,2] 郑家妍 巫佳杰[1] 

机构地区：[1]南京林业大学材料科学与工程学院,南京210037 [2]南京林业大学(泗阳)杨木加工利用技术研究院,江苏泗阳223700

出　　处：《林业工程学报》2016年第5期95-100,共6页Journal of Forestry Engineering

基　　金：江苏省科技支撑计划(BE2012425);江苏省产学研联合创新基金项目(BY2011013)

摘　　要：随着石油资源的不断匮乏,速生杨木这种可再生生物质资源逐渐被人们所重视,为制备可以替代传统树脂的新型树脂材料,解决当今能源危机问题,许多国家都在生物质资源利用方面做了研究。以杨木屑为原料,通过液化试验制备液化产物,再通过液化产物制备树脂,研究催化剂和液化剂用量、反应时间以及反应温度对液化产物所制树脂的影响,寻找较优制备条件。结果表明：液化反应在液固比为1.5的70%苯酚用量、聚乙二醇400的复合液化剂,4%浓硫酸催化剂用量,135℃的液化反应温度,120 min的液化反应时间条件下,可制备出效果较好的液化产物,其残渣率为7%,羟值为370 mg/g。通过液化产物制备树脂的较佳条件是：甲醛与液化产物摩尔比1.2,Na OH与液化产物摩尔比0.5,反应温度85℃反应时间120 min。在此条件下制得优质树脂,黏度为4 500-6 500 m Pa·s,固含量70%-80%。With the diminishing of fossil oil resource, the fast-growing poplar wood, which is a renewable biomass resource is gradually valued by people as an alternative to traditional resource. Liquefaction of poplar wood showed that the residue rate was significantly reduced with the increase of the sulfuric acid amount used in the liquefaction. But further increased the amount of sulfuric acid led to the increasing of residue rate and decreasing of hydroxyl value due to the repolymerization of lignin broken bond. When the reaction time was prolonged, the residue rate decreased while the hydroxyl value did not changed significantly. When the reaction time exceeded 80 min, the hydroxyl value decreased. When solid paraformaldehyde instead of formaldehyde solution was used to synthesize resin with liquefied wood, the viscosity and solid content of the resin increased. The viscosity of the resin significantly decreased as the increase of sodium hydroxide amount, while it had little effect on the solid content of the resin. Increasing reaction temperature and prolonging reaction time could promote the polymerization reaction and increased the viscosity of resulted resin, but their impacts on the solid content of the resin was small. The results showed that the optimum liquefaction condition was as follows： the liquid to solid ratio was 1.5, 70% phenol content of polyethylene glycol 400 composite liquefaction agent, sulfuric acid catalyst content was 4%, liquefaction temperature was 135 ℃ and liquefaction reaction time was 120 min. The resin synthesis condition was as follows ： the molar ratio of formaldehyde to liquefied wood was 1.2, the molar ratio of sodium hydroxide to liquefied wood was 0.5, reaction temperature was 85 %, and reaction time was 120 min. The viscosity arid solid content of the resin was 4 500-6 500 mPa. s and 70% -80%, respectively.

关 键 词：杨木 液化试验 液化产物 树脂 

分 类 号：TQ432[化学工程] S785[农业科学—林学]