Rahman Khandkar-Siddikur, Islam Md Nazrul, Rahman Md Mushfiqur, Hannan Md Obaidullah, Dungani Rudi, Khalil Hps Abdul
Forestry and Wood Technology Discipline, Khulna University, Khulna, 9208 Bangladesh.
Springerplus. 2013 Nov 23;2:629. doi: 10.1186/2193-1801-2-629. eCollection 2013.
This study deals with the fabrication of composite matrix from saw dust (SD) and recycled polyethylene terephthalate (PET) at different ratio (w/w) by flat-pressed method. The wood plastic composites (WPCs) were made with a thickness of 6 mm after mixing the saw dust and PET in a rotary type blender followed by flat press process. Physical i.e., density, moisture content (MC), water absorption (WA) and thickness swelling (TS), and mechanical properties i.e., Modulus of Elasticity (MOE) and Modulus of Rupture (MOR) were assessed as a function of mixing ratios according to the ASTM D-1037 standard. WA and TS were measured after 24 hours of immersion in water at 25, 50 and 75°C temperature. It was found that density decreased 18.3% when SD content increased from 40% to 70% into the matix. WA and TS increased when the PET content decreased in the matrix and the testing water temperature increased. MOE and MOR were reached to maximum for the fabricated composites (2008.34 and 27.08 N/mm(2), respectively) when the SD content were only 40%. The results indicated that the fabrication of WPCs from sawdust and PET would technically feasible; however, the use of additives like coupling agents could further enhance the properties of WPCs.
本研究通过平板压制法，以不同比例（重量/重量）由锯末（SD）和回收聚对苯二甲酸乙二酯（PET）制备复合基质。将锯末和PET在旋转式搅拌机中混合后，通过平板压制工艺制成厚度为6毫米的木塑复合材料（WPC）。根据ASTM D - 1037标准，评估了物理性能（即密度、含水量（MC）、吸水率（WA）和厚度膨胀率（TS））以及机械性能（即弹性模量（MOE）和断裂模量（MOR））随混合比例的变化。在25、50和75°C温度下，将材料浸泡在水中24小时后测量WA和TS。结果发现，当基质中SD含量从40%增加到70%时，密度下降了18.3%。当基质中PET含量降低且测试水温升高时，WA和TS增加。当SD含量仅为40%时，所制备的复合材料的MOE和MOR达到最大值（分别为2008.34和27.08 N/mm²）。结果表明，由锯末和PET制备WPC在技术上是可行的；然而，使用偶联剂等添加剂可以进一步提高WPC的性能。
