剑麻柄处理方法对剑麻纤维/脲醛树脂复合材料的性能影响

Influences of Treatment Methods for Sisal Stems on Properties of Sisal Fiber/Formaldehyde Resin Composites

采用碱处理、偶联剂处理、醋酸处理等方法 ,对剑麻柄进行处理 ,再与自行合成的脲醛树脂 (UF)进行捏合、模压 ,制成剑麻纤维 /脲醛树脂共混复合材料。研究了碱处理最佳工艺以及不同处理方法对复合材料的力学性能、耐磨性、耐水性、电性能和热性能的影响 ,并与木粉 /UF复合材料的性能进行了对比。结果表明 :剑麻柄的处理方法对复合材料的电性能、热性能和吸水性影响不大 ;采用乙酰化处理剑麻柄时 ,复合材料强度较高 ,耐磨性好 ,此时剑麻纤维 /UF复合材料的各项性能接近木粉

Sisal fiber/UF composites were made by blending sisal stems treated by alkali,coupling agents and acetic acid with UF resin synthesized by the author and molded at certain temperature.Effects of different treatment conditions by the alkali and treatment ways on the mechanical properties,wear resistance,water absorption,electrical properties and thermal performance were studied and compared with those of wood powder/UF composites.Results showed that the techniques treating sisal stems had little effect on electric properties,thermal performance and water absorption of the composites.When the sisal stems were treated by acetylation, the composites had higher strength and better wear resistance,and properties of sisal fiber/UF are close to those of wood powder/UF composites.