Natural Products Research Laboratory, Industrial Chemistry Unit, Department of Chemical Sciences, Olusegun Agagu University of Science and Technology, Okitipupa, Ondo State, Nigeria.
Department of Environmental Science and Natural Resources, National Open University of Nigeria, Ibadan Study Center, Ijokodo, Ibadan, Oyo State, Nigeria.
Sci Rep. 2022 Jun 22;12(1):10545. doi: 10.1038/s41598-022-14691-z.
250 µm particle size of wood and polyethylene (PE) materials were compounded at mixing proportions of 60/40, 70/30, and 80/20 (with an increase in polymer to decrease in wood content) and extruded using a single screw extruder at a temperature range of 110-135 °C. The particles of Gmelina Arborea, Tectona grandis, Cordia milleni, and Nauclea diderichii with recycled Polyethylene were compounded and compressed at 175 N/mm to produce biopolymer composites. The biopolymer composites were subjected to dimensional stability test at 24 h of the water soak method and the ability to withstand load-bearing capacity was investigated. The outcome of the results shows that extruded-compressive biopolymer composites had values ranging from 0.06-1.43 g/cm, 0.38-3.41%, and 0.82-6.85% for observed density, water absorption, and thickness swelling at 24 h of a water soak test. The mechanical properties values ranged from 0.28 Nmm-21.35 Nmm and 0.44-550.06 Nmm for flexural modulus and strength; and 191.43 Nmm-1857.24 Nmm and 0.35 Nmm-243.75 Nmm for tensile modulus and strength respectively. It was observed that moisture uptake and strength displayed by the composites vary accordingly in values obtained for wood species at different mixing proportions. As observed that the more polyethylene content is compounded to wood, the better its dimensional stability, and flexural and tensile properties. The wood particles of Cordia milleni compounded at a proportion of 60 to 40 (polyethylene/wood) performed best in dimensional stability and load-bearing capacity. This study confirmed the effect of methods on wood species and recycled PE for manufacturing wood polymer-based composite for both indoor and outdoor applications.
250 µm 粒径的木材和聚乙烯（PE）材料以 60/40、70/30 和 80/20 的混合比例（聚合物增加，木材含量减少）进行复合，并在 110-135°C 的温度范围内使用单螺杆挤出机挤出。将 Gmelina Arborea、Tectona grandis、Cordia milleni 和 Nauclea 的颗粒与回收的聚乙烯进行复合，并在 175 N/mm 的压力下压缩，以生产生物聚合物复合材料。将生物聚合物复合材料在水浸泡法 24 小时后进行尺寸稳定性测试，并研究其承受承载能力的能力。结果表明，挤出压缩生物聚合物复合材料的观察密度、吸水率和厚度膨胀率在水浸泡 24 小时时的值分别为 0.06-1.43 g/cm、0.38-3.41%和 0.82-6.85%。机械性能值分别为 0.28 Nmm-21.35 Nmm 和 0.44-550.06 Nmm，弯曲模量和强度；191.43 Nmm-1857.24 Nmm 和 0.35 Nmm-243.75 Nmm，拉伸模量和强度。观察到复合材料的吸湿性和强度值随不同混合比例下木材种类的变化而变化。观察到，与木材复合的聚乙烯含量越多，其尺寸稳定性、弯曲和拉伸性能越好。在比例为 60 到 40（聚乙烯/木材）的 Cordia milleni 木材颗粒中，在尺寸稳定性和承载能力方面表现最佳。本研究证实了方法对木材种类和回收 PE 的影响，用于制造用于室内和室外应用的木基聚合物复合材料。
