C. Parvathi ¹, T. Maruthavanan ², S. Sivamani ³, C. Prakash ⁴, C. V. Koushik ⁴

Affiliations
1 Dept. of Chemistry, VSA School of Engineering, VSA Group of Institutions, Uthamasolapuram, Salem-636 010, IN
2 Dept. of Chemistry, Sona starch, Sona College of Technology, Salem 636 005, IN
3 Dept. of Biotechnology, VMKV Engineering College, Salem 636 005, IN
4 Dept. of Fashion Technology, Sona College of Technology, Salem 636 005, IN

Abstract

A carbon sorbent derived from an agricultural waste, tapioca peel was applied to study the removal of a reactive dye, Red Brown C4R from aqueous solution. Batch experiments were performed as a function of process parameters like agitation time, initial dye concentration and carbon dose. Modified Ritchie second order equation better predicted the kinetic results compared to other rate equations (pseudo first order&pseudo second order) tested. Among the isotherm models applied to the equilibrium data Freundlich model better predicted the experimental values. The adsorption capacity was 121.47 mg g^-1 at an initial pH of 6 and at 32±0.5°C. The adsorption capacity increased with increase in temperature. The influence of pH on dye removal was not significant. An optimum carbon dose of 1.2 g L^-1 was required for the maximum removal (96%) of dye from its 60 mg L^-1 solution.

Keywords

Adsorption, Red Brown C4R, Tapioca Peel, Activated Carbon, Kinetics, Isotherms

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D. Raja ¹, A. Arputharaj ², C. Prakash ¹, V. Ramesh Babu ¹, C. V. Koushik ¹

Affiliations
1 Dept. of Fashion Technology, Sona College of Technology, Salem–636 005, IN
2 Textile Chemistry, Central Institute for Research on Cotton Technology, Mumbai-19, IN

Abstract

Organic cotton is grown using methods and materials that have a low impact on the environment. Organic cotton is grown and processed without toxic chemicals that can be absorbed easily when in contact with the user's skin. This paper describes the dyeing behavior of organic cotton vs conventional cotton to find what will be the significance between them. The ring spun yarns of 40s combed organic (GOTS certified) and ordinary cotton were produced with similar parameters like beating point and settings. Knitted fabrics were produced with similar loop length and weight using organic and ordinary cotton yarn. Both the fabrics were processed in GOTS certified Processing unit using reactive dyes in soft flow machine in single dye bath. Processed fabrics were tested for colour fastness to washing, water, rubbing, perspiration and light. Colour difference and strength were also measured using Spectrophotometer (DATACOLOUR). Presence of metals were also analyzed in both the processed fabrics and reported here.

Keywords

Organic Cotton, Dyeing, Fabrics, Textile

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C. Prakash ¹, C. V. Koushik ¹

Affiliations
1 Dept. of Fashion Technology, Sona College of Technology, Salem – 636 005, Tamil Nadu, IN

Abstract

This paper deals with the dimensional stability of silk and model union knitted fabric as also the effect of loop length on the knitting of silk and modal yarn in plaited structure. Silk material has exceptional lustre and good tenacity among the natural fibres. Silk knitted fabric is regarded as a special product that can hold its own and survive in the competitive and diversified global textile market. With regard to silk-filament yarn knitting, it has been observed that the number of plies in the yarn and the yarn twist are interrelated and their effect on fabric properties is significant.

Keywords

Silk Filament, Loop Length, WPI, CPI, Stitch Density, Loop Shape Factor, Wales Constant

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