摘要
以单宁、糠醇、乙二醛、环氧树脂为原料,在实验室条件下共缩聚制备天然单宁-糠醇-乙二醛-环氧树脂硬塑料,通过对其压缩强度、三点弯曲强度、布氏硬度的测试,表征塑料的力学性能,采用扫描电子显微镜观测塑料的微观结构,通过接触角和表面能测试表征塑料的疏水能力,通过差示扫描量热分析表征TFGE树脂的固化性能。结果表明:环氧树脂的加入增加了单宁-糠醇-乙二醛树脂的固化温度,增加了树脂的网状结构,使制备的单宁-糠醇-乙二醛-环氧树脂硬塑料与酚醛塑料相比,具备更高的布氏硬度、抗压强度、弯曲强度和疏水能力。
Natural plastic based on tannin-furfuryl alcohol-glyoxal-epoxy resin(TFGE)has been prepared by the co-condensation of tannin,furfuryl alcohol,glyoxal and epoxy resin under acidic condition in laboratory.The mechanical properties of the plastic were characterized by compressive strength,three-point bending strength and Brinell hardness tests.The microcosmic of the plastic was observed by scanning electron microscopy(SEM).The water resistance ability of the plastic was characterized by contact angle and surface energy tests.The curing property of TFGE resin was characterized by differential scanning calorimetry(DSC).The results show that the curing temperature of TFG resin and the network structure of the resin system increased by the addition of epoxy resin in tannin resin system.Thus,the cured TFGE plastic has higher Brinell hardness,compressive strength,flexural strength and better water resistance compared with phenolic plastics(PF).
作者
张俊
丰尚
席雪冬
杜官本
周晓剑
Zhang Jun;Feng Shang;Xi Xuedong;Du Guanben;Zhou Xiaojian(Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products,Southwest Forestry University,Kunming Yunnan 650233,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2020年第2期167-172,共6页
Journal of Southwest Forestry University：Natural Sciences
基金
国家自然科学基金青年基金(31800482)资助
西南林业大学科研启动基金(000033)资助
云南省农业联合专项(2018FG001-095)资助。
关键词
单宁
树脂
硬塑料
力学性能
环氧树脂
固化温度
tannin
resin
rigid plastic
mechanical property
epoxy resin
curing temperature
