Aspects of alkali treatment of sponge gourd (Luffa cylindrica) fibers on the flexural properties of polyester matrix composites

2003 ◽  
Vol 87 (12) ◽  
pp. 1927-1932 ◽  
Author(s):  
C. A. Boynard ◽  
S. N. Monteiro ◽  
J. R. M. d'Almeida
Keyword(s):  
Alkali Treatment ◽  
Flexural Properties ◽  
Matrix Composites ◽  
Luffa Cylindrica ◽  
Sponge Gourd ◽  
Polyester Matrix

Effect of alkali treatment on the flexural properties of a Luffa cylindrica-reinforced epoxy composite

2018 ◽  
Vol 25 (1) ◽  
pp. 85-93 ◽  
Author(s):  
Niharika Mohanta ◽  
Samir K. Acharya
Keyword(s):  
Flexural Strength ◽  
Treatment Time ◽  
Saline Water ◽  
Fiber Composite ◽  
Alkali Treatment ◽  
Fiber Composites ◽  
Subzero Temperature ◽  
Flexural Properties ◽  
Luffa Cylindrica ◽  
Untreated Fiber

AbstractThis experimental study was conducted to investigate the effect of NaOH concentration and treatment time on the flexural properties ofLuffa cylindricafiber-reinforced epoxy composites. Significant improvement (up to 84.92%) in the flexural properties for the treated fiber composite compared with the untreated fiber composite was observed. Both treated and untreated fiber composites were then subjected to different environmental treatments (saline water, distilled water, and subzero temperature). To find out the changes in flexural strength immediately after treatment, the same test was carried out on the composites. Degradation in the flexural strength of both treated and untreated fiber composites, when subjected to environmental treatments, was observed. They were found within the range of 2%–20% and were found to be least in subzero treatment. The SEM micrograph indicates that alkali treatment is effective in improving the adhesion between the fiber and matrix.

Dynamic-Mechanical Performance of Sponge Gourd Fiber Reinforced Polyester Composites

2016 ◽  
Vol 869 ◽  
pp. 203-208 ◽  
Author(s):  
Verônica Scarpini Cândido ◽  
Michel Picanço Oliveira ◽  
Sergio Neves Monteiro
Keyword(s):  
Glass Transition ◽  
Mechanical Performance ◽  
Matrix Composites ◽  
Natural Materials ◽  
Dynamic Mechanical ◽  
Lignocellulosic Fibers ◽  
Lignocellulosic Fiber ◽  
Sponge Gourd ◽  
Polyester Matrix ◽  
Polyester Composites

The engineering applications of natural materials to replace synthetic ones has marked increased in past decades owing to environmental, societal and economical issues. Among these natural materials, the lignocellulosic fibers obtained from plants are successfully being used as polymer composites reinforcement is substitution of the traditional glass fiber. One relatively unknown lignocellulosic fiber with potential for composite reinforcement is that extracted from the sponge gourd. In the present work, the dynamic-mechanical performance of unsaturated orthophtalic polyester matrix composites was evaluated for different volume fractions of continuous and aligned sponge gourd fiber reinforcement. The results revealed that an increasing incorporation of sponge gourd fiber improved the composite viscoelastic stiffness, while decreasing its glass transition temperature.

Effects of chitosan coating on postharvest quality and shelf life of sponge gourd (Luffa cylindrica) during storage

2014 ◽  
Vol 166 ◽  
pp. 1-8 ◽  
Author(s):  
Cong Han ◽  
Jinhua Zuo ◽  
Qing Wang ◽  
Lijing Xu ◽  
Baiqiang Zhai ◽  
...  
Keyword(s):  
Shelf Life ◽  
Postharvest Quality ◽  
Luffa Cylindrica ◽  
Chitosan Coating ◽  
Sponge Gourd ◽  
Quality And Shelf Life

Tensile Strength of Polyester Matrix Composites Reinforced with Giant Bamboo (Dendrocalmus giganteus) Fibers

2014 ◽  
Vol 775-776 ◽  
pp. 308-313 ◽  
Author(s):  
Sergio Neves Monteiro ◽  
Frederico Muylaert Margem ◽  
Lucas Barboza de Souza Martins ◽  
Rômulo Leite Loiola ◽  
Michel Picanço Oliveira
Keyword(s):  
Tensile Strength ◽  
Room Temperature ◽  
Polyester Resin ◽  
Bamboo Fiber ◽  
Matrix Composites ◽  
Limited Information ◽  
Specimen Length ◽  
Lignocellulosic Fibers ◽  
Polyester Matrix ◽  
Bamboo Fibers

Fibers of the giant bamboo (Dendrocalmus giganteus) are amongst the strongest lignocellulosic fibers. Although studies have been already performed, limited information exists on the mechanical properties of polymeric composites reinforced with continuous and aligned giant bamboo fibers. This work evaluates the tensile strength of this type of composite. Standard tensile specimens were fabricated with up to 30% of fibers aligned along the specimen length. The fibers were press-molded with a commercial polyester resin mixed with a hardener and cured for 24 hours at room temperature. The specimens were tensile tested in an Instron machine and the fracture surface analyzed by scanning electron microscopy. The tensile strength increased significantly with the amount of giant bamboo fiber reinforcing the composite. This performance can be associated with the difficult of rupture imposed by the fibers as well as with the type of cracks resulting from the bamboo fiber/polyester matrix interaction, which prevents rupture to occur.

scholarly journals Analysis of Variance Fruit Yield and its Components in Sponge Gourd [Luffa cylindrica (Roem.) L.]

2018 ◽  
Vol 7 (06) ◽  
pp. 383-386
Author(s):  
Sanjeev Kumar ◽  
V.J. Bhatiya ◽  
Sanjay Kumar ◽  
Vidya Bhati ◽  
Dushyant Parihar
Keyword(s):  
Analysis Of Variance ◽  
Fruit Yield ◽  
Luffa Cylindrica ◽  
Sponge Gourd

scholarly journals Mechanical behavior of mallow fabric reinforced polyester matrix composites

2018 ◽  
Vol 7 (4) ◽  
pp. 515-519 ◽  
Author(s):  
Ygor Macabu de Moraes ◽  
Carolina Gomes Dias Ribeiro ◽  
Carlos Luiz Ferreira ◽  
Eduardo Sousa Lima ◽  
Jean Igor Margem ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Matrix Composites ◽  
Polyester Matrix

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.

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