scholarly journals Surface Modification of Commingled Flax/PP and Flax/PLA Fibres by Silane or Atmospheric Argon Plasma Exposure to Improve Fibre–Matrix Adhesion in Composites

Fibers ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 2
Author(s):  
Wiwat Pornwannachai ◽  
A. Richard Horrocks ◽  
Baljinder K. Kandola
Keyword(s):  
Flame Retardant ◽  
Surface Treatments ◽  
Atmospheric Plasma ◽  
Poly Lactic Acid ◽  
Flexural Properties ◽  
Plasma Exposure ◽  
Sem Images ◽  
Matrix Adhesion ◽  
Maximum Improvement ◽  
Fibre Matrix

Challenges faced by natural fibre-reinforced composites include poor compatibility between hydrophilic fibres such as flax and hydrophobic polymeric matrices such as polypropylene (PP) or poly(lactic acid) (PLA), and their inherent flammability. The former promotes weak interfacial adhesion between fibre and matrix, which may be further compromised by the addition of a flame retardant. This paper investigates the effect that the added flame retardant (FR), guanylurea methylphosphonate (GUP) and selected surface treatments of commingled flax and either PP or PLA fabrics have on the fibre/matrix interfacial cohesive forces in derived composites. Surface treatments included silanisation and atmospheric plasma flame exposure undertaken both individually and in sequence. 1-, 2- and 8-layered composite laminates were examined for their tensile, peeling and flexural properties, respectively, all of which yield measures of fibre-matrix cohesion. For FR-treated Flax/PP composites, maximum improvement was obtained with the combination of silane (using vinyltriethoxysilane) and plasma (150 W) treatments, with the highest peeling strength and flexural properties. However, for FR-treated Flax/PLA composites, maximum improvement in both properties occurred following 150 W plasma exposure only. The improvements in physical properties were matched by increased fibre-matrix adhesion as shown in SEM images of fractured laminates in which fibre-pullout had been eliminated.

Effects of Surface Treatments on Tensile, Thermal and Fibre-matrix Bond Strength of Coir and Pineapple Leaf Fibres with Poly Lactic Acid

2018 ◽  
Vol 15 (6) ◽  
pp. 1035-1046 ◽  
Author(s):  
Ramengmawii Siakeng ◽  
Mohammad Jawaid ◽  
Hidayah Ariffin ◽  
Mohd Sapuan Salit
Keyword(s):  
Lactic Acid ◽  
Bond Strength ◽  
Surface Treatments ◽  
Poly Lactic Acid ◽  
Fibre Matrix

scholarly journals Thermo-Mechanical and Morphological Properties of Polymer Composites Reinforced by Natural Fibers Derived from Wet Blue Leather Wastes: A Comparative Study

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1837
Author(s):  
Alessandro Nanni ◽  
Mariafederica Parisi ◽  
Martino Colonna ◽  
Massimo Messori
Keyword(s):  
Tensile Strength ◽  
Polymer Matrix ◽  
Thermoplastic Polyurethane ◽  
Young Modulus ◽  
Morphological Properties ◽  
Poly Lactic Acid ◽  
Matrix Adhesion ◽  
The Poor ◽  
Leather Wastes ◽  
Fiber Matrix

The present work investigated the possibility to use wet blue (WB) leather wastes as natural reinforcing fibers within different polymer matrices. After their preparation and characterization, WB fibers were melt-mixed at 10 wt.% with poly(lactic acid) (PLA), polyamide 12 (PA12), thermoplastic elastomer (TPE), and thermoplastic polyurethane (TPU), and the obtained samples were subjected to rheological, thermal, thermo-mechanical, and viscoelastic analyses. In parallel, morphological properties such as fiber distribution and dispersion, fiber–matrix adhesion, and fiber exfoliation phenomena were analyzed through a scanning electron microscope (SEM) and energy-dispersive spectroscopy (EDS) to evaluate the relationship between the compounding process, mechanical responses, and morphological parameters. The PLA-based composite exhibited the best results since the Young modulus (+18%), tensile strength (+1.5%), impact (+10%), and creep (+5%) resistance were simultaneously enhanced by the addition of WB fibers, which were well dispersed and distributed in and significantly branched and interlocked with the polymer matrix. PA12- and TPU-based formulations showed a positive behavior (around +47% of the Young modulus and +40% of creep resistance) even if the not-optimal fiber–matrix adhesion and/or the poor de-fibration of WB slightly lowered the tensile strength and elongation at break. Finally, the TPE-based sample exhibited the worst performance because of the poor affinity between hydrophilic WB fibers and the hydrophobic polymer matrix.

Flame-Retardant and Flexural Properties of Polypropylene/Intumescent Composites

2015 ◽  
Vol 34 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
J. Z. Liang ◽  
J. Q. Feng ◽  
S. Y. Zou ◽  
D. F. Liu ◽  
S. D. Zhang
Keyword(s):  
Flame Retardant ◽  
Flexural Properties

scholarly journals The combined plasticization of jute and tung oil anhydride for jute fiber reinforced poly(lactic acid) composites

2021 ◽  
pp. 096739112110576
Author(s):  
Ying Zhou ◽  
Can Chen ◽  
Lan Xie ◽  
Xiaolang Chen ◽  
Guangqiang Xiao ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Physical And Mechanical Properties ◽  
Complex Viscosity ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Sem Images ◽  
Pseudoplastic Fluid ◽  
Tung Oil ◽  
Biodegradable Poly ◽  
The Impact

In this work, novel plasticizing biodegradable poly (lactic acid) (PLA) composites were prepared by melt blending of jute and tung oil anhydride (TOA), and the physical and mechanical properties of PLA/jute/TOA composites were tested and characterized. The impact strength of PLA/jute/TOA composites significantly increases with increasing the content of TOA. The SEM images of fracture surface of PLA/jute/TOA composites become rough after the incorporation of TOA. In addition, TOA changes the crystallization temperature and decomposition process of PLA/jute/TOA composites. With increasing the amount of TOA, the value of storage modulus (E′) of PLA/jute/TOA composites gradually increases. The complex viscosity (η*) values for all samples reduce obviously with increasing the frequency, which means that the pure PLA and PLA/jute/TOA composites is typical pseudoplastic fluid. This is attributed to the formation of crosslinking, which restricts the deformation of the composites.

Inclusion of modified lignocellulose and nano-hydroxyapatite in development of new bio-based adjuvant flame retardant for poly(lactic acid)

2018 ◽  
Vol 666 ◽  
pp. 51-59 ◽  
Author(s):  
Henri Vahabi ◽  
Meisam Shabanian ◽  
Fezzeh Aryanasab ◽  
Rémy Mangin ◽  
Fouad Laoutid ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Flame Retardant ◽  
Poly Lactic Acid
Sign in / Sign up

Export Citation Format

Share Document