China
Africa
Explore chapters and articles related to this topic
Recent Developments in Computational Modeling of Viscoelastic Properties of Biocomposites
Published in Senthil Muthu Kumar Thiagamani, Md Enamul Hoque, Senthilkumar Krishnasamy, Chandrasekar Muthukumar, Suchart Siengchin, Vibration and Damping Behavior of Biocomposites, 2022
Renuka Sahu, Athul Joseph, Vishwas Mahesh, Vinyas Mahesh, Dineshkumar Harursampath
Using the viscoelastic theory given by Lodge, the viscoelastic behavior of biocomposites made up of high-density polyethylene (HDPE) matrix reinforced by wood particles was studied. This wood particle composite (WPC) is prepared using the process of thermoforming in which the WPC sheet is spread over the die and heated to its softening point. The Lodge’s integral viscoelastic model was used for determining the mechanical behavior of WPC. Then, nonlinear dynamic finite element approach was adopted to simulate the inflation of the sheet. The lagrangian description was adopted and large deformation with finite strain was considered. The continuum sheet was modeled using isoparametric linear triangular elements and the assumption of plane stress was made as the sheet’s thickness was less compared to other dimensions. Simulating an airflow load using the van der Waals gas equation, the formability of the WPC composite was studied. It was found that on increasing the wood particle content in the WPC, the elastic behavior becomes predominant making forming difficult. Stress-induced in the sheet was directly proportional to the wood particle content going as high as 8–9 times the stress generated in pure HDPE for WPC weight fraction 50% (shown in Figure 18.5) [45].
Ecofriendly Polymers: A Need of the Day
Published in Satish A. Dake, Ravindra S. Shinde, Suresh C. Ameta, A. K. Haghi, Green Chemistry and Sustainable Technology, 2020
Jayesh Bhatt, Monika Jangid, Rakshit Ameta, Suresh C. Ameta
The biocomposites developed by the use of renewable polymers and naturally available fibers like furfuryl alcohol, poly(lactic acid), gluten, starch, soy flour, etc., are gaining considerable attention these days because of their environment-friendly nature. Wood is a biologically derived biodegradable raw material and it requires minimum processing energy. Hazarika et al. [43] opined that wood polymer composites (WPC) have enormous advantages and it can improve the mechanical, physical, chemical as well as some other properties of the composite, which are suitable for different applications (outdoor and indoor). Such properties of the WPC can be improved to the desired extant by application of nanotechnology, cross-linking agents, flame retardants, grafting, etc. For example, flame retardants, which are obtained from gum of the plant Moringa oleifera can efficiently improve the flame retardancy and also some other properties of the composites.
Study of eco-friendly additives for wood-plastics composites: a step toward a better environment
Published in Badal Jageshwar Prasad Dewangan, Maheshkumar Narsingrao Yenkie, Novel Applications in Polymers and Waste Management, 2018
S. A. Puranik, Dinesh desai, Kintu jain
Till now, the wood-plastics composites (WPCs) were using 30-40% of wood or fillers. Remaining components were other chemicals including the base polymer material. But now the WPCs, with up to 90% wood fiber or wood flour content is gaining popularity. Wood filler, usually added in ratios of 40-60% of a given WPC formulation, adds stiffness, and decreases the tendency of plastic to creep. This, itself is an eco-friendly additive for the WPC. Thus, the demand for WPC is expected to rise in quest for minimal maintenance requirements, excellent weather ability, and high resistance to wear and tear in construction applications. Adding wood flour improves the mechanical properties of thermoplastics, but on the other hand, it increases the burning speed of the materials. This is one of the major disadvantages in WPCs.2
A review on waste wood reinforced polymer composites and their processing for construction materials
Published in International Journal of Sustainable Engineering, 2023
Katleho Keneuwe Khoaele, Oluwatoyin Joseph Gbadeyan, Viren Chunilall, Bruce Sithole
Wood plastic composite (WPC) refers to a blend of wood-based materials recovered from the sawmill industry, such as fibres, sawdust, lumber, veneer, or particles which are blended with biodegradable polymers such as thermoplastics or thermosetting from recycling to generate composite material (Friedrich 2022; Gardner, Han, and Wang 2015; Siddique et al. 2022). Though WPCs are low density, cost-effective, eco-friendly, recyclable, durable, stiff, good in strength, and low maintenance, their significant limit for polymers used requires processing conditions (pressure, melting temperature) that would not thermally decompose the wood filler as the wood decomposes around 220 °C (Srivabut et al. 2022). The properties of the composite comprise excellent stiffness, high strength, low thermal expansion, no catastrophic failure, and resistance to environmental and chemical factors (Amjad et al. 2021).
Processing of hybrid wood plastic composite reinforced with short PET fibers
Published in Materials and Manufacturing Processes, 2018
Srdjan Dragan Perisic, I. Radovic, M. Petrovic, A. Marinkovic, D. Stojanovic, P. Uskokovic, V. Radojevic
Flexural strength of composites also shows significant improvement of mechanical properties in WPC samples. As it can be seen from Fig. 7, the flexural strength increases linearly with surface modification of wood fibers and also with the addition of PET fibers, whereas sample without bonding agent and PET (curve 2) has about 60% lower flexural strength than samples with them (curve 4,5,6). The use of bonding agent improves interaction and adhesion between wood and matrix leading to better matrix to fiber stress transfer. The same effect is determined for addition of PET fibers which lead to an increased stress at failure and the higher values for flexural strength in the treated and no-treated samples. Wood fibers (cellulosic) are high modulus and strength material. An increase in mechanical properties demonstrates that MPTSM and TDI effectively functioned as bonding agent.
A circular economy use of waste wood sawdust for wood plastic composite production: effect of bio-plasticiser on the toughness
Published in International Journal of Sustainable Engineering, 2020
Nawadon Petchwattana, Phisut Naknaen, Borwon Narupai
Wood plastic composite (WPC) is widely known and used as a building material for the natural wood substitutions and waste utilisation. Its main compositions composed of the polymer matrix and wood sawdust (WS) or other natural fibres (Petchwattana et al. 2017; Prakash et al. 2018). In recent years, the new European bioeconomy strategy directs to promote the sustainable use of renewable resources such as wood and wood-based products. This aims to convert waste into new products or transform the industrial by-products into high value bio-based products (Sommerhuber, Welling, and Krause 2015; McCormick and Kautto 2013). Thus, WPC production is one of technologies which catagorized in the bioeconomy strategy.