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Article
Publication date: 16 June 2021

Nachiappan Sukumar, Mekonnen Bayeleyegn and Sampath Aruna

Recently, composites have concerned considerable importance as a potential operational material. Lots of work have been carried out to enhance the mechanical properties of…

143

Abstract

Purpose

Recently, composites have concerned considerable importance as a potential operational material. Lots of work have been carried out to enhance the mechanical properties of composites. The main aim of this paper is to develop bamboo mat as reinforcing material with bagasse fiber as filler using epoxy resin matrix composite.

Design/methodology/approach

In this research, the effect of fiber surface treatments on mechanical properties of epoxy resin composite with bagasse as filler has been developed and investigated. The extracted bamboo fibers were treated with NaOH to improve the surface roughness fiber. Using treated and untreated bamboo fiber handwoven mat has been produced to be used as reinforcement and bagasse fiber has been converted into powder to be filled as filler. Composite material is fabricated using bamboo fiber and bagasse fiber as filler with epoxy resin as a matrix using hand layup technique.

Findings

Then, tensile, flexural and compressive strength and water absorption tests were conducted on sodium hydroxide treated and untreated fiber composites. The test results comparing with and without alkali treated composites show that there was significant change in their strength and water absorption properties on alkali treated fiber.

Originality/value

This study is an original research paper.

Details

Research Journal of Textile and Apparel, vol. 26 no. 1
Type: Research Article
ISSN: 1560-6074

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Article
Publication date: 5 December 2018

Shirani Ranasinghe, Thilak Jayalath, Sampath Thennakoon, Ranjith Jayasekara, Ran Shiva and Tharanga Bandara

Purpose of this study is to measure the Vitamin D status of healthy adults and to correlate with their lifestyle and feeding habits. Plasma 25-Hydroxyvitamin D (25(OH)D) is the…

64

Abstract

Purpose

Purpose of this study is to measure the Vitamin D status of healthy adults and to correlate with their lifestyle and feeding habits. Plasma 25-Hydroxyvitamin D (25(OH)D) is the most common marker of vitamin D status of an individual. Deficiency of vitamin D is defined as the serum level less than 20 ng/mL and insufficiency as 30 ng/mL which can be prevented.

Design/methodology/approach

Vitamin D status of healthy adults (n = 82), both male and females between the age of 18 – 50 years who were attending to the National Transport Authority, Kandy, Sri Lanka from February to March 2016, was measured and correlated with their lifestyle, feeding habits, etc.

Findings

The mean total serum D (25(OH)D in this study was 40.15 ± 3.74 nmol/l with the mean value of 42.8 ± 28.8 and 37.5 ± 16.6 for women and men, respectively. The serum calcium levels of both female and male were around 8 mg/dl and the serum total protein was 6.5 and 7 g/dl in women and men, respectively. The serum Vitamin D, calcium and total protein were not statistically significantly different between the sexes. In this study, 84 per cent of the total subjects were normocalcemic, and there was no significant relationship between vitamin D levels and their calcium levels.

Research limitations/implications

This study demonstrates that there was no statistically significant correlation between the serum vitamin D with age, serum calcium or total proteins. The majority of participants who had exposure to the sunlight more than 30 mins/day had sufficient level of vitamin D and less than 30 min/day exposure had deficiency of vitamin D. Daily intake of multivitamin influenced vitamin D status of the study group.

Practical implications

These findings will implicate the importance of cultural, feed and social habits for the nutritional status of an individual.and there are no reported studies on vitamin D status with reference to the variation of life style.

Social implications

It is very important to investigate the factors affecting to the vitamin D status of a population as such, vitamin D insufficiency or deficiency can be prevented. In Sri Lanka, the population is consisting with many ethnic groups, different ethnic groups may find some nutritional problems according to their main cultural habits.

Originality/value

The objectives of this study are to evaluate the Vitamin D status in a group of healthy adults between 20 and 50 years in both men and women and to find out the correlation of their vitamin D status with their lifestyle and feeding habits, etc.

Details

Nutrition & Food Science, vol. 49 no. 4
Type: Research Article
ISSN: 0034-6659

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Article
Publication date: 2 January 2023

Yinxia Dong, Mingtian Li, Yingjun Zhang, Chun Xie and Zhongwen Pan

The purpose of this study is to modify cerium dioxide with fumaric acid (CeO2-f) to improve its compatibility and dispersibility in epoxy resin and to investigate the effect of…

227

Abstract

Purpose

The purpose of this study is to modify cerium dioxide with fumaric acid (CeO2-f) to improve its compatibility and dispersibility in epoxy resin and to investigate the effect of the content on the coating performance.

Design/methodology/approach

To investigate whether CeO2-f reacts with epoxy resin by ring opening, CeO2-f and epoxy resin-treated CeO2-f (Ce CeO2-f/EP) were analyzed by infrared radiation (IR), X-ray diffraction (XRD) and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis). To reveal the effect of different content on coatings properties, neutral salt spray test (NSST) and electrochemical test were performed.

Findings

The results of IR, XRD, X-ray photoelectron spectroscopy and UV-Vis indicated that fumaric acid attached to the CeO2 surface by chemical bonding and underwent a ring-opening reaction with epoxy resin, thus, improving the compatibility of CeO2 in epoxy resin. NSST and electrochemical impedance spectroscopy results showed that the coatings containing 5% CeO2-f exhibited the optimal corrosion resistance. The reason is that a dense conversion film was established on the substrate surface.

Originality/value

The epoxy coatings using CeO2-f as fillers with synergistic inhibition ability are promising for the protection of carbon steel.

Details

Anti-Corrosion Methods and Materials, vol. 70 no. 2
Type: Research Article
ISSN: 0003-5599

Keywords

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