The influence of white mud on the water absorption, surface wettability, mechanical, and dynamic thermomechanical properties of core–shell structured wood-plastic composites

2021 ◽  
Author(s):  
Yu Xian ◽  
Cuicui Wang ◽  
Ge Wang ◽  
Leemiller Smith ◽  
Haitao Cheng
Keyword(s):  
Water Absorption ◽  
Thermomechanical Properties ◽  
Surface Wettability ◽  
Core Shell ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
White Mud

scholarly journals Thermal decomposition kinetics of core-shell structured wood-plastic composites: Effect of white mud loadings on the shell layer

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2747-2762
Author(s):  
Yu Xian ◽  
Cuicui Wang ◽  
Ge Wang ◽  
Leemiller Smith ◽  
Haitao Cheng
Keyword(s):  
Activation Energy ◽  
Thermal Decomposition ◽  
Decomposition Kinetics ◽  
Thermal Decomposition Kinetics ◽  
Core Shell ◽  
Shell Layer ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
White Mud ◽  
Kinetics Of

This study inspected the thermal decomposition kinetics of core-shell structured wood-plastic composite material with white mud loading in the shell. The thermal decomposition was studied via thermogravimetric analysis under nitrogen atmosphere. Experiments were performed at different heating rates of 5, 10, 20, 30, and 40 °C/min from ambient temperature to 700 °C. Multivariate linear regression analysis was applied to estimate the activation energy with the Flynn–Wall–Ozawa method, and the thermal aging life equations of composites were obtained as described in ASTM E1877 (2000). The results showed that the combustion characteristic parameters (T5%, Tp1, Tp2, and Tp3) increased at first and then decreased with increased white mud concentration. Accordingly, the average apparent activation energy (Ea) values of thermal decomposition with conversion rates ranging between 20% and 80% were 222 kJ/mol for high-density polyethylene (HDPE) shell layer and the average values of 201, 226, 201, 207, and 223 kJ/mol were achieved with white mud loading of 5, 10, 15, 20, and 25% in the shell layer, respectively. There were no remarkable dependencies among them. The service life tf (min) and the service temperature T (K) of the core-shell structured wood-plastic composites were experimentally determined.

Water Absorption and Swelling Behaviour of Wood Plastic Composites

2021 ◽  
pp. 195-212
Author(s):  
Sabarish Radoor ◽  
Jasila Karayil ◽  
Jyothi Mannekote Shivanna ◽  
Suchart Siengchin
Keyword(s):  
Water Absorption ◽  
Swelling Behaviour ◽  
Wood Plastic Composites ◽  
Plastic Composites

Study of Water Absorption Behavior in Wood Plastic Composites by Using Neutron Radiography Techniques

2003 ◽  
Vol 42 (5) ◽  
pp. 925-934 ◽  
Author(s):  
M. N. Islam ◽  
Mubarak A. Khan ◽  
M. K. Alam ◽  
M. A. Zaman ◽  
M. Matsubayashi
Keyword(s):  
Water Absorption ◽  
Neutron Radiography ◽  
Wood Plastic Composites ◽  
Plastic Composites

Properties of wood-plastic composites (WPCs) reinforced with extracted and delignified wood flour

Holzforschung ◽  
2014 ◽  
Vol 68 (8) ◽  
pp. 933-940 ◽  
Author(s):  
Yao Chen ◽  
Nicole M. Stark ◽  
Mandla A. Tshabalala ◽  
Jianmin Gao ◽  
Yongming Fan
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Mechanical Performance ◽  
Wood Flour ◽  
Hot Water ◽  
Sodium Chlorite ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
Acetone Water ◽  
Full Factorial Experimental Design

Abstract The water sorption and mechanical properties of wood-plastic composites (WPCs) made of extracted and delignified wood flour (WF) has been investigated. WF was prepared by extraction with the solvent systems toluene/ethanol (TE), acetone/water (AW), and hot water (HW), and its delignification was conducted by means of sodium chlorite/acetic acid (AA) solution. A 24 full-factorial experimental design was employed to determine the effects of treatments and treatment combinations. WPCs were prepared with high-density polyethylene (HDPE) and treated WF was prepared by means of extrusion followed by injection molding, and the water absorption characteristics and mechanical properties of the products were evaluated. WPCs produced with extracted WF had lower water absorption rates and better mechanical properties than those made of untreated WF. WPCs containing delignified WF had higher water absorption rates and improved mechanical performance compared with those made of untreated WF.

Influence of active inorganic fillers on the physical and mechanical properties of polyvinyl chloride wood-plastic composites when immersed

BioResources ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 789-804
Author(s):  
Qiang Jin ◽  
Lin Zhu ◽  
Jiedeerbieke Madiniyeti ◽  
Chunxia He ◽  
Li Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Water Absorption ◽  
Polyvinyl Chloride ◽  
Steel Slag ◽  
Physical And Mechanical Properties ◽  
Control Group ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
Inorganic Fillers

Hydration-active steel slag and slag micropowder were used as inorganic fillers with silane coupling agent (KH550) to prepare wheat straw/polyvinyl chloride wood-plastic composites (WPCs) by extrusion molding. A 35-day immersion and a pre-immersion test were carried out to analyze the influence of steel slag and slag micropowder on the physical and mechanical properties of the WPCs under wet conditions. Results showed the following: (1) KH-550 exhibited a good surface modification effect on the activated steel slag and slag micropowder, (2) an increase in the activated steel slag and slag micropowder content could effectively reduce the percent water absorption of the WPCs by 20% to 25% and the expansion by 20% to 24%, respectively, compared with the control group, but had a limited effect on the tensile strength retention, and (3) pre-immersion could effectively induce the synergistic reinforcement effect of the active fillers, resulting in reaching the saturated water absorption within 20 days. The water absorption and tensile strength were respectively 18% to 25% lower and 1.5% to 3% higher than those of the composites without pre-immersion. The results of this study could provide experimental data and theoretical references for the influence of hydration-active inorganic fillers on WPC properties.

scholarly journals The Comparison of Water Absorption Analysis between Counterrotating and Corotating Twin-Screw Extruders with Different Antioxidants Content in Wood Plastic Composites

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
Mohd Hafizuddin Ab Ghani ◽  
Sahrim Ahmad
Keyword(s):  
Water Absorption ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Wood Plastic Composites ◽  
Twin Screw Extruders ◽  
Plastic Composites ◽  
Study Results ◽  
Significant Difference ◽  
Twin Screw ◽  
Screw Extruders

Water absorption is a major concern for natural fibers as reinforcement in wood plastic composites (WPCs). This paper presents a study on the comparison analysis of water absorption between two types of twin-screw extruders, namely, counterrotating and corotating with presence of variable antioxidants content. Composites of mixed fibres between rice husk and saw dust with recycled high-density polyethylene (rHDPE) were prepared with two different extruder machines, namely, counterrotating and corotating twin screw, respectively. The contents of matrix (30 wt%) and fibres (62 wt%) were mixed with additives (8 wt%) and compounded using compounder before extruded using both of the machines. Samples were immersed in distilled water according to ASTM D 570-98. From the study, results indicated a significant difference among samples extruded by counterrotating and corotating twin-screw extruders. The counterrotating twin-screw extruder gives the smallest value of water absorption compared to corotating twin-screw extruder. This indicates that the types of screw play an important role in water uptake by improving the adhesion between natural fillers and the polymer matrix.

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