油茶果壳/杨木/HDPE复合材料的制备及性能研究

Preparation and Properties Study of Tea Oil Camellia Shells/Poplar Wood/HDPE Composites

油茶果壳作为茶油加工的副产物,一直被视为农林废弃物。利用油茶果壳部分替代杨木制备木塑复合材料(WPC),是油茶果壳工业化利用的有效途径。采用挤出成型的方法,探究了不同质量油茶果壳替代杨木对WPC性能的影响。结果表明:随着油茶果壳替代杨木的比例由0增至1/2,制得的WPC弯曲强度和拉伸强度先增大后减小,当替代量为1/6时,其弯曲和拉伸强度最大,分别提高了5.39%和3.67%,冲击强度升高;WPC的热解起始温度变低,最大失重速率减少31.59%;储能模量逐渐减小,损耗角正切值和复数黏度增大;当油茶果壳替代量为1/2时,其7天吸水率降低了35.41%。用油茶果壳部分替代杨木制备WPC,既能保证抗弯强度,还能增强复合材料的冲击韧性、尺寸稳定性等。

As a by-product of camellia oil processing,tea oil camellia shells(TOCS)have been regarded as agricultural and forestry waste.Preparing wood plastic composites(WPC)with TOCS partially replacing poplar wood is an effective way to industrial utilization.In this paper,the method of extrusion forming was adopted to explore the effects of different weight replacement on properties of the WPC.The results showed that,as the replacement ratio from O to 1/2,the flexural strength and tensile strength increased firstly and then decreased.When the TOCS replacement ratio was 1/6,the flexural strength and tensile strength of WPC reached the maximum.The impact strength increased.The initial pyrolysis temperature was lower,the maximum rate of weight loss reduced by 31.59%.The storage modulus decreased gradually,the loss tangent and complex viscosity increased.The water absorption rate after 7 days reduced by 35.41%when replacement ratio was 1/2.Preparing WPC with TOCS partially replacing poplar wood can not only guarantee the bending strength,but also enhance the impact toughness and size stability.