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AKTU Applied Chemistry for Fibres, Polymers and Sustainable Textiles Lab (AAS152B / AAS252B) Syllabus PDF – B.Tech 1st Year
Applied Chemistry for Fibres, Polymers and Sustainable Textiles Lab AAS152B / AAS252B
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Official AKTU syllabus of Applied Chemistry for Fibres, Polymers and Sustainable Textiles Lab (AAS152B / AAS252B) for B.Tech 1st Year – 1 credits, L-T-P 0-0-2. Read the unit-wise course content, course outcomes, evaluation pattern and recommended books online, or download the PDF.
Syllabus — Applied Chemistry for Fibres, Polymers and Sustainable Textiles Lab
Download PDFAAS152B / AAS252B · 1 credits · L-T-P 0-0-2
Course Objectives
- To identify and characterise natural and synthetic textile fibres by chemical and physical tests
- To study polymer properties including viscosity, degree of polymerisation, and solubility
- To perform dyeing experiments and determine dye-fibre affinity and exhaustion
- To evaluate finishing chemicals and their effect on textile fabric properties
- To apply green chemistry in textile processing and assess effluent quality
List of Experiments
| Exp. | Theory | Title | Description / Objective Unit |
| 1 | Unit I | Fibre Identification by Chemical Solubility Tests | Identify given natural and synthetic fibre samples (cotton, wool, silk, nylon, polyester, acrylic) using differential solubility in acids, alkalis, and solvents; record systematic observations |
| 2 | Unit I | Moisture Regain and Moisture Content of Fibres | Determine moisture regain and moisture content of cotton, wool, nylon, and polyester samples by oven-drying method; relate to hygroscopicity and comfort properties of fibres |
| 3 | Unit II | Viscosity Average Molecular Weight of Polymer | Measure viscosity of polymer solution (PVA or cellulose) at different concentrations using Ostwald viscometer; determine intrinsic viscosity [η]; compute viscosity-average molecular weight using Mark-Houwink equation |
| 4 | Unit II | Degree of Polymerisation by Viscosity Method | Determine degree of polymerisation (DP) of a cellulose or polymer sample from intrinsic viscosity; relate DP to fibre strength and processing behaviour |
| 5 | Unit III | Dyeing of Cotton with Direct Dye | Dye a cotton fabric sample with a direct dye at optimum temperature and salt concentration; measure dye exhaustion by UV-Vis spectrophotometry; calculate % exhaustion and colour strength (K/S value) |
| 6 | Unit III | Dyeing of Nylon with Acid Dye | Dye a nylon fabric with an acid dye under acidic conditions; control pH with acetic acid; measure exhaustion by UV- Vis; study effect of pH on dye uptake |
| 7 | Unit III | Effluent Analysis of Dye Bath | Analyse the exhausted dye bath effluent for BOD, COD, and colour; relate to environmental impact of textile wet processing; assess need for treatment |
| 8 | Unit IV | Softener Finish – Effect on Fabric Handle | Apply cationic softener to cotton fabric at different concentrations; evaluate handle by subjective bending test and crease recovery angle measurement; relate to softener chemistry |
| 9 | Unit IV | Water Repellency Test on Finished Fabric | Apply water-repellent finish (fluorocarbon or silicone-based) to fabric samples; evaluate water repellency by spray test (IS/AATCC method) and contact angle measurement; relate to DWR chemistry |
| 10 | Unit V | Natural Dye Extraction and Dyeing | Extract natural dye from turmeric, henna, or onion skin; mordant cotton fabric with alum; dye and assess colour strength by UV-Vis; relate to sustainable natural dyeing and green textile chemistry |
| 11 | Unit V | Enzymatic Scouring of Cotton (Bio-scouring Demo) | Scour cotton fabric using pectinase enzyme solution; compare whiteness, wettability, and weight loss with conventional alkali scouring; relate to enzyme-based green processing |
| 12 | Unit I | Burning Test and Melting Behaviour of Fibres | Perform burning test on natural (cotton, wool, silk) and synthetic (nylon, polyester, acrylic) fibres; observe flame behaviour, odour, and ash; correlate with fibre chemical structure and fire safety |
Equipment / Chemicals Required
- Oven and analytical balance for moisture regain
- Ostwald viscometer with thermostat water bath
- UV-Vis spectrophotometer
- Dyeing beakers, thermostatic dyeing bath
- pH meter and buffer solutions
- Contact angle goniometer
- Spray test apparatus (AATCC standard)
- Crease recovery angle tester
- COD apparatus, BOD incubator
- Microscope for fibre observation
Teaching-Learning Methodology
Each laboratory session begins with a 10-minute pre-lab discussion connecting the experiment to the corresponding theory unit. Students record aim, principle, apparatus, chemicals, procedure, observation table, calculations, result, and inference in the laboratory record book. Post-lab discussion relates experimental findings to real-world engineering applications in the respective stream. Students maintain a laboratory record book assessed for viva, record, and day-to-day performance.
Course Outcomes
| COs | Course Outcome Statement | KL |
|---|---|---|
| CO1 | Identify textile fibres by solubility and burning tests and determine moisture regain | K3 |
| CO2 | Determine viscosity-average molecular weight and degree of polymerisation of polymer samples | K3 |
| CO3 | Perform dyeing experiments and evaluate dye exhaustion and effluent quality | K3 |
| CO4 | Apply softener and water-repellent finishes and evaluate fabric property changes | K3 |
| CO5 | Extract and apply natural dyes and demonstrate enzyme-based green textile processing | K3 |
Evaluation Pattern
| Sr. | Component | Marks | Weightage |
| 1. | Day-to-day performance (Observation, Procedure, Conduct) | 20 | 20% |
| 2. | Laboratory Record / File | 30 | 30% |
| 3. | End Semester Practical Examination (Experiment + Viva Voce) | 50 | 50% |
Text Books
- Engineering Chemistry – Jain and Jain
- Textile Chemistry – Thomas Bechtold and Tung Pham
- Dyes and Pigments – R. Christie Safety and General Instructions
- Students must wear lab coat and safety goggles at all times in the chemistry laboratory
- Handle all acids, alkalis, and oxidising agents with extreme care; use fume hood for volatile chemicals
- Dispose of chemical waste in designated containers as per lab safety guidelines
- Do not pipette by mouth; use rubber bulb or mechanical pipette fillers
- Wash hands thoroughly after every experiment; report any spillage or accident immediately
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