TY4007 Eco-Friendly Dyes, Chemicals and Processing Syllabus:

TY4007 Eco-Friendly Dyes, Chemicals and Processing Syllabus – Anna University PG Syllabus Regulation 2021

OBJECTIVES:

 To impart knowledge about the environmental and ecological aspects of various chemicals, dyes and auxiliaries used in processing.
 To make the students aware of the alternative chemicals and dyes that can replace the harmful chemicals.
 To update the students on the various rules, regulation that governs the textile processing industry.

UNIT I IMPACT OF TEXTILE PROCESS CHEMICALS ON ECOLOGY

Pollution – definition – Types – Impact of pollution on environment- Pollution capability of chemicals and products used in processing – pollution load at every stages of processing – Pollution associated with various colouration process – Need for eco-friendly processing- Important issues in exports- Red listed chemicals – Possible sources of contamination of various red listed chemicals German Laws – Ban on amines and Azo dyes-List of banned amines and chemicals.

UNIT II ECO STANDARDS

Need for Eco – standards. Eco standards – European & USA. Permissible limits (norms) of chemicals, pH, colour fastness and heavy metals by different eco-standards such as MST, OEKOTEX, CLEANFASHION, STEILMANN & – Eco-labeling and labels – Eco- auditing – Ecomanagement – ISO 14000 – SA 8000 – Natural Textiles – Organic Cotton – GOTS & organic exchange certification –APEO , NPEO & OPEO Limitations

UNIT III ECO TESTING

Toxic substances used in processing and safe alternatives- Principles and procedures involved in the estimation of pH, pesticides, Residual formaldehyde, carcinogenic dyes, chlorinated phenols, phthalates, organo tin and heavy metals, – Consequences of presence of above compounds in Textiles – permissible limits – eco testing of antimicrobial finish with triclosan.

UNIT IV ECO FRIENDLY PROCESSING

Eco-friendly dyeing of sulphur dyes- Eco-friendly per-acetic acid bleaching – Eco friendly pigment printing & discharge Printing. Organic stabilizer– Application of Diazo sensitizer in screen preparation– Application of Eco-friendly preservatives– Non PVC, Non Phthalate, Plastizol inks, Formaldehyde free dye fixing agents. Enzymes and their role. Application of Enzymes in Desizing, Scouring & Peroxide killing on cotton material, Degumming of silk – Application of Enzymes in finishing – eco friendly crease recovery finish, stone wash effect by Bio-polishing

UNIT V CLEAN TECHNOLOGIES FOR FUTURE

Clean technology – Sustainable development – Ozone bleaching, RF drying, Microwave assisted dyeing, Ultrasonic assisted processing, Supercritical CO2 dyeing, importance of energy & water conservation – Energy audit – Basics & application scope of Nano technology in textiles – Occupational diseases & safety measures in Textile units.

TOTAL: 45PERIODS

OUTCOME:

Upon completion of this course the student shall have knowledge on
 The ecology associated with textile processing.
 The eco standards.
 The eco testing relevant to textile materials.
 The eco friendly textile wet processing.
 The auditing and safety measures related to effluents in textile industry.

REFERENCES:

1. Chavan R.B., Radhakrishnan J., Environmental Issues – Technology Options for Textile Industry, IIT Delhi Publication,1998
2. Reife A and Freeman H.S., Environmental Chemistry of dyes and pigments, Wiley,2001,ISBN:0471589276
3. Asokan R.,Eco-Friendly Textile Wet Processing, NCUTE Publications, NewDelhi,2001
4. Eco friendly Textiles: Challenges to the Textile Industry, Textiles Committee, Mumbai,1996.