Regenerated waste tire powders as fillers for wood fiber composites

Waste rubber retains good elasticity and can be regenerated for use in special applications. In this research, wood fiber composites were made with waste tire powders (WTPs) as functional fillers. The physical-mechanical properties of the wood-rubber composite (WRC) panels, i.e., inner bond (IB) strength, static bending modulus (MOE), strength (MOR), and thickness swelling (TS) were assessed. The surface micro-morphology of the WRC panels was quantitatively analyzed and was graphically simulated with Matlab software. The results showed that WTPs decreased the mechanical strength and modulus of the hybrid composites, which was caused by the weak fiber/WTP interfacial adhesion. The addition of WTPs roughened the surface of composite panels. However, WRC panels showed improved hygroscopic stability and flexibility compared to pure wood fiber composites. Sanding can flatten the rougher WRC panel surface; however, it brings tiny pits to the surface that are caused by loss of rubber powders. Surface overlaying with resin impregnated paper was found to be effective to cover the tiny pits. This study showed that it is feasible to make value added rubber filled wood fiber composites with satisfactory performance.

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Improvement of Performance Profile of Acrylic Based Polyester Bio-Composites by Bast/Basalt Fibers Hybridization for Automotive Applications

Journal of Composites Science ◽

10.3390/jcs5040100 ◽

2021 ◽

Vol 5 (4) ◽

pp. 100

Author(s):

Anjum Saleem ◽

Luisa Medina ◽

Mikael Skrifvars

Keyword(s):

Hybrid Composites ◽

Flexural Modulus ◽

Basalt Fiber ◽

Fiber Composites ◽

Fiber Reinforced ◽

Basalt Fibers ◽

Bast Fiber ◽

Bast Fibers ◽

Resin Impregnation ◽

Structural Applications

New technologies in the automotive industry require lightweight, environment-friendly, and mechanically strong materials. Bast fibers such as kenaf, flax, and hemp reinforced polymers are frequently used composites in semi-structural applications in industry. However, the low mechanical properties of bast fibers limit the applications of these composites in structural applications. The work presented here aims to enhance the mechanical property profile of bast fiber reinforced acrylic-based polyester resin composites by hybridization with basalt fibers. The hybridization was studied in three resin forms, solution, dispersion, and a mixture of solution and dispersion resin forms. The composites were prepared by established processing methods such as carding, resin impregnation, and compression molding. The composites were characterized for their mechanical (tensile, flexural, and Charpy impact strength), thermal, and morphological properties. The mechanical performance of hybrid bast/basalt fiber composites was significantly improved compared to their respective bast fiber composites. For hybrid composites, the specific flexural modulus and strength were on an average about 21 and 19% higher, specific tensile modulus and strength about 31 and 16% higher, respectively, and the specific impact energy was 13% higher than bast fiber reinforced composites. The statistical significance of the results was analyzed using one-way analysis of variance.

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UV aging of poly(propylene)/wood-fiber composites

Polymer Composites ◽

10.1002/pc.20048 ◽

2004 ◽

Vol 25 (5) ◽

pp. 543-553 ◽

Cited By ~ 80

Author(s):

Ragnar Seldén ◽

Birgitha Nyström ◽

Runar Långström

Keyword(s):

Wood Fiber ◽

Fiber Composites ◽

Uv Aging ◽

Poly Propylene

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Uso de almidón de papa modificado como agente acoplante en compuestos polímero-fibras de madera/The effect of potato starch modified as a coupling agent in polymer-wood fiber composites

Prospectiva ◽

10.15665/rp.v16i1.1236 ◽

2018 ◽

Vol 16 (1) ◽

pp. 107-113

Author(s):

Yenny Marlén González Mancilla

Keyword(s):

Coupling Agent ◽

Potato Starch ◽

Wood Fiber ◽

Fiber Composites

En los materiales compuestos es importante lograr una buena unión entre la matriz y el refuerzo, para lo cual se utiliza un agente de acoplamiento. Se estudió el efecto del almidón de papa modificado como agente acoplante, en la resistencia mecánica y en la morfología de la interfase, de un compuesto polímero-aserrín de madera. Se utilizó polietileno de baja densidad (PEBD) reciclado de 70 a 80 % p/p, fibras de madera (aserrín) 15 a 25 %, que fueron secadas y clasificadas a tamaño de malla 60 y almidón de papa modificado (5 a 15 %), como agente acoplante. Las materias primas fueron mezcladas, conformadas por extrusión en caliente, a 110 °C (entrada) y 210 °C (salida). El material obtenido fue moldeado y prensado. Se fabricaron 4 mezclas y se obtuvieron láminas para fabricar probetas para ensayos de tracción y de flexión, se seleccionaron 32 por cada mezcla. Los resultados mostraron que el almidón de papa modificado incrementó la resistencia a la tracción y a la flexión del compuesto, con respecto a las muestras sin agente acoplante. Se observó la impregnación de las fibras con la matriz al usar almidón de papa modificado como agente acoplante, a lo que se atribuye el aumento en la resistencia.

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