Gul Waheed, Shah Syed Riaz Akbar, Khan Afzal, Pruncu Catalin I
Department of Mechanical Engineering, Institute of Space Technology, Islamabad 44000, Pakistan.
Department of Mechatronics Engineering, University of Engineering and Technology, Peshawar 25120, Pakistan.
Polymers (Basel). 2021 Jan 25;13(3):371. doi: 10.3390/polym13030371.
The main purpose of this research work is to characterize zinc oxide-urea formaldehyde nano resin and identify the physical performance of medium-density fiberboard (MDF). Considering the dry weight of natural fibers, the ZnO nanoparticles were added to urea formaldehyde (UF) glue at four levels-0.0%, 1.0%, 2.0% and 3.0%-and their effects were investigated in terms of the physical properties of MDF. The surface morphology and crystalline structure of ZnO, UF and UF-ZnO nanofillers were characterized using Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD) analysis and significant improvements were achieved as a result of the addition of nanoparticles. Thermal properties were analyzed by means of differential scanning calorimetry (DSC) and thermogravemetric analysis (TGA) and it was observed that increasing the concentration of ZnO nanoparticles ultimately enhanced the curing of UF-ZnO nanofillers. Finally, density, thickness swelling and water absorption properties were investigated and it was observed that thickness swelling and water absorption properties were improved by 38% and 12%, respectively, when compared to control MDF.
本研究工作的主要目的是对氧化锌-脲醛纳米树脂进行表征，并确定中密度纤维板（MDF）的物理性能。考虑到天然纤维的干重，将氧化锌纳米颗粒以0.0%、1.0%、2.0%和3.0%四个水平添加到脲醛（UF）胶中，并就其对中密度纤维板物理性能的影响进行了研究。使用扫描电子显微镜（SEM）和X射线衍射（XRD）分析对氧化锌、脲醛和脲醛-氧化锌纳米填料的表面形态和晶体结构进行了表征，添加纳米颗粒后取得了显著改善。通过差示扫描量热法（DSC）和热重分析（TGA）对热性能进行了分析，观察到增加氧化锌纳米颗粒的浓度最终增强了脲醛-氧化锌纳米填料的固化。最后，对密度、厚度膨胀和吸水性能进行了研究，观察到与对照中密度纤维板相比，厚度膨胀和吸水性能分别提高了38%和12%。
