scholarly journals Influence of Alkali Treatment on the Mechanical Properties of Wool Fiber

1975 ◽  
Vol 46 (4) ◽  
pp. 202-207
Author(s):  
Keiji KONDO ◽  
Yukichi SAKIMOTO
Keyword(s):  
Mechanical Properties ◽  
Alkali Treatment ◽  
Wool Fiber

scholarly journals Influence of Alkali Treatment on the Microstructure and Mechanical Properties of Coir and Abaca Fibers

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2636
Author(s):  
Petr Valášek ◽  
Miroslav Müller ◽  
Vladimír Šleger ◽  
Viktor Kolář ◽  
Monika Hromasová ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Alkali Treatment ◽  
Fiber Surface ◽  
Cellulose Fibers ◽  
Sem Analysis ◽  
Experimental Program ◽  
Time Interval ◽  
The European Union ◽  
Vegetable Fibers

Composite materials with natural fillers have been increasingly used as an alternative to synthetically produced materials. This trend is visible from a representation of polymeric composites with natural cellulose fibers in the automotive industry of the European Union. This trend is entirely logical, owing to a preference for renewable resources. The experimental program itself follows pronounced hypotheses and focuses on a description of the mechanical properties of untreated and alkali-treated natural vegetable fibers, coconut and abaca fibers. These fibers have great potential for use in composite materials. The results and discussion sections contribute to an introduction of an individual methodology for mechanical property assessment of cellulose fibers, and allows for a clear definition of an optimal process of alkalization dependent on the content of hemicellulose and lignin in vegetable fibers. The aim of this research was to investigate the influence of alkali treatment on the surface microstructure and tensile properties of coir and abaca fibers. These fibers were immersed into a 5% solution of NaOH at laboratory temperature for a time interval of 30 min, 1 h, 2 h, 3 h, 6 h, 12 h, 24 h, and 48 h, rinsed and dried. The fiber surface microstructures before and after the alkali treatment were evaluated by SEM (scanning electron microscopy). SEM analysis showed that the alkali treatment in the NaOH solution led to a gradual connective material removal from the fiber surface. The effect of the alkali is evident from the visible changes on the surface of the fibers.

Mechanical properties of polyester/corn husk fibre composite produced using vacuum infusion technique

2021 ◽  
Vol 29 (9_suppl) ◽  
pp. S1532-S1540
Author(s):  
Shibly Shadik Mir Md ◽  
Ming Yeng Chan ◽  
Seong Chun Koay
Keyword(s):  
Mechanical Properties ◽  
Fibre Composite ◽  
Alkali Treatment ◽  
Flexural Modulus ◽  
Fibre Length ◽  
Flexural Properties ◽  
Vacuum Infusion ◽  
Corn Husk ◽  
Plastic Composite ◽  
Polyester Composites

Issues pertaining to deforestation, environmental pollution and natural wastes are increasing day by day. These issues can be resolved by introducing a new composite material, in which natural waste is used as fibre and as a replacement of wood plastic composite. The different lengths (3, 6 and 9 cm) of corn husk fibre filled polyester composites were produced using the vacuum infusion method. Several mechanical properties of these polyester composites, such as tensile and flexural properties, were evaluated. The results revealed that both the tensile and flexural properties of polyester composites increased with increment of corn husk fibre length from 3 to 6 cm. However, the results decreased for 9 cm of fibre length filled composites. Similar trends were recorded after alkali treatment of the corn husk fibre filled polyester composites. The alkali treatment with sodium hydroxide had improved the tensile strength (33%), Young’s modulus (23%), elongation (14%), flexural strength (42%) and flexural modulus (8.5%) of the polyester/corn husk fibre composites with 6 cm of fibre length by enhancing the mechanical interlocking bonding between treated corn husk fibres and polyester.

Effect of alkali treatment on mechanical properties of jute fiber-reinforced partially biodegradable green composites using epoxy resin matrix

2019 ◽  
Vol 28 (6) ◽  
pp. 388-397
Author(s):  
Jai Inder Preet Singh ◽  
Sehijpal Singh ◽  
Vikas Dhawan
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Alkali Treatment ◽  
Matrix Material ◽  
Resin Matrix ◽  
Infrared Analysis ◽  
Test Results ◽  
Green Composites ◽  
Jute Fibers ◽  
Naoh Solution

In this work, partially biodegradable green composites have been developed with the help of compression molding technique. Jute fibers were selected as a reinforcement and epoxy resin as matrix material. The influence of alkali treatment on various mechanical properties of jute/epoxy composites was investigated, with concentrations ranging from 1%, 3%, 5%, 7%, and 9% NaOH solution. Various test results indicate that with an increase in concentration, tensile and flexural strength increases up to 5% concentration of NaOH, thereafter both the properties decrease, but impact strength increases up to 7% concentration and thereafter decreases. The results of mechanical characterizations were further validated through the study of morphology with scanning electron microscopy and Fourier transform infrared analysis. The optimal concentration of 5% concentration for alkali treatment of fibers have been suggested.

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