scholarly journals Alkali Concentration and Diluent Effects on Properties of Grape Cane Fiber-Reinforced Polymer Composites

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4055
Author(s):  
Balkis F. A. Bakar ◽  
Frederick A. Kamke
Keyword(s):  
Polymer Composites ◽  
Alkali Treatment ◽  
Unsaturated Polyester ◽  
Fiber Surface ◽  
Alkali Concentration ◽  
Fiber Types ◽  
Concentration Effects ◽  
Outer Bark ◽  
Fiber Reinforced Polymer Composites ◽  
Fiber Surface Treatment

The main objective of this study was to investigate the properties of polymer composites reinforced with grape cane fibers. The fibers were subjected to a sodium hydroxide (NaOH) treatment at two treatment concentrations to extract the fibers as well as fiber surface treatment. Panels were fabricated by hand lay-up and compression molding according to different fiber types, namely outer bark (OB) and whole (W) fibers. The whole fiber was a mixture of OB and inner bark (IB) fibers. Grape cane fibers were used as the reinforcement material for unsaturated polyester (UPE) resin panels. Acrylated epoxidized soybean oil (AESO) was used as a reactive diluent material with the UPE resin, and the results were compared with panels prepared with commercial styrene–UPE. There were inconsistent alkali treatment concentration effects on the mechanical properties and water absorption. However, panels fabricated with the whole bark fibers that have been treated with 1 wt % NaOH and had AESO–UPE resin resulted in the best tensile and flexural strength.

scholarly journals A Review on Application of Single and Hybrid Fiber Reinforced Polymer Composites

2020 ◽  
pp. 325-327
Author(s):  
Sumesh K R ◽  
Kanthavel K ◽  
Saikrishnan G
Keyword(s):  
Polymer Composites ◽  
Polymer Matrix ◽  
Natural Fiber ◽  
Alkali Treatment ◽  
Natural Fibers ◽  
Crystallinity Index ◽  
Practical Applications ◽  
Synthetic Fibers ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites

The applications of natural fiber composites have enormously increased due to the high availability, eco-friendly nature and practical applications of the composites. In this review different fiber combinations using natural fiber and synthetic fibers have been investigated and found with interesting results. The hybrid nature of fiber reinforcement adds to the mechanical properties of polymer-based composites. The hybridization using more than one fiber reduces the surface deformations in the polymer matrix and enhanced the bonding ability of polymer composites. The alkali treatment was the effective surface treatment process for improving the cellulosic nature with good crystalline nature, good bonding ability with the polymer matrix, this adds to the properties of polymer-based composites. The crystallinity index of 43-68 % were observed in surface treated natural fibers.

Unsaturated Polyester Resins and Fiber-Reinforced Polymer Composites from Plant Biomass

2020 ◽  
Vol 869 ◽  
pp. 169-174
Author(s):  
Victor Klushin ◽  
Ekaterina Shabliy ◽  
Dmitry Petrenko
Keyword(s):  
Polymer Composites ◽  
Plant Biomass ◽  
Unsaturated Polyester ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Polyester Resins ◽  
Hydroxymethyl Furfural ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Furandicarboxylic Acid

We are the first to report the synthesis of maleic acid in quantitative yield by oxidation of 5-hydroxymethyl furfural with hydrogen peroxide in the presence of sodium bicarbonate in an aqueous medium under ambient conditions without the using of toxic catalysts and solvents. 5-hydroxymethyl furfural and 2,5-furandicarboxylic acid have been prepared from hexose plant biomass. Based on maleic anhydride and 2,5-furandicarboxylic acid, unsaturated polyesters were synthesized for the first time from renewable raw materials only. A fiber-reinforced polymer composite based on these polyester resins have been prepared. Strength properties of carbon and glass fiber-reinforced polymer composites are 1.5 times superior to the strength of similar phthalic acid based composites.

The Effect of Chemical Treatment on Sisal Fiber Property

2013 ◽  
Vol 821-822 ◽  
pp. 72-75
Author(s):  
Yun Hong Deng ◽  
Hong Ling Liu ◽  
Wei Dong Yu
Keyword(s):  
Contact Angle ◽  
Chemical Treatment ◽  
Alkali Treatment ◽  
Fiber Surface ◽  
Sisal Fiber ◽  
Alkali Concentration ◽  
Concentration Increase ◽  
Structure And Property ◽  
Sisal Fibers ◽  
High Alkali

The aim of this work was to research the effect of chemical treatment on the structure and property of sisal fiber. The changes of the surface morphology, chemical composition and wettability of different alkali concentration treated sisal fibers were studied using Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR) and Optical Contact Angle Meter (OCA). The results showed that the non-cellulosic materials were removed from fiber surface and many branches along the fibers were caused by high alkali concentration. Deconvolving spectra in OH stretching region exhibited the amount of hydrogen bonding decreased firstly and then increased with the alkali concentration increase. The effect of alkali treatment on the wettability of fibers was characterized by the contact angle analyses. The contact angle of fiber decreased gradually with the concentration increase.

Chemical Treatment and Characterization of Fiber of Babassu Coconut Epicarp (Orbignya phalerata) for Application in Polymeric Composite

2016 ◽  
Vol 869 ◽  
pp. 233-236
Author(s):  
Carlos Alberto Lopes Fonteles ◽  
Gustavo Figueiredo Brito ◽  
José Francisco Reis Sobrinho ◽  
Tatianny Soares Alves ◽  
Renata Barbosa
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Alkali Treatment ◽  
Low Cost ◽  
Implementation Process ◽  
Fiber Surface ◽  
Polymeric Composite ◽  
Plant Fibers ◽  
Polymeric Matrices

This set of mechanical properties of plant fibers allows its use as a reinforcement element in polymeric matrices and composites can be used in various sectors, and thus expanding the scope of use and the aggregate value of plant fibers. In this work, the choice by the use of alkali process to make the treatment of epicarp babassu fibers was decided in view of that it provides an effective, simple and low cost implementation process and also for being the most widely used method for modifying the surface of the fiber forming polymer composites. By SEM, it was observed the removal of wax layers, the impurities on the fiber surface and tyloses. With alkali treatment, it was also possible to notice the narrowing and closing of craters due to the packaging of denser material.

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