Contents. Introduction Objective. Experimental Results and Discussions Conclusion. Polyamide 6,6 9/17/2016

Transcription

1 ontents Study of Enzymatic and Alkaline Surface Modification of Polyamide 6,6 Most. Setara Begum Senior Lecturer, BGMEA University of Fashion & Technology (BUFT) Prof. Jiping Wang*, Dr. Jindan Wu Zhejiang Sci-Tech University, angzhou, hina World Textile onference II, Mumbai September, 2016 Introduction bjective Experimental Results and Discussions onclusion September 17, 2016 Zhejiang Sci-Tech University 2 Polyamide 6,6 urrent ydrophilization Methods Pros ons igh Strength Reduced Wearing omfort Wrinkle and Abrasion Build-up of Electrostatic harges Resistance Pilling Tendency Relatively Low cost Difficulties in Finishing onvenient Processing Poor Soil Release Properties Tailorable Performance Poor Dyeability Easy Recycling September 17, 2016 Zhejiang Sci-Tech University 3 a) Physical methods Plasma Functionalization b) hemical methods Alkaline Treatment (a) c) Bio-technological methods Enzymatic Surface Modification of Textiles September 17, 2016 Zhejiang Sci-Tech University 4 1

2 Physical methods hemical methods Plasma Functionalization Advantage: lean & simple technique; Without use of water & chemicals Disadvantage: Relatively igh ost ot Easy to control the process/effectiveness Treatment not uniform Alkaline Treatment (a) Advantages(+): + igh degree of improving hydrophilicity + Significant change of surface appearance and touch of treated fabric + Relatively low cost Disadvantages(-): - igh chemical usage - arsh process - Significant fabric damage; weight and strength loss - igh water pollution (resulted from water consumption and chemical pollutants) - Limited use for blends (Regenerated cellulose) September 17, 2016 Zhejiang Sci-Tech University 5 September 17, 2016 Zhejiang Sci-Tech University 6 Bio-technological methods Enzymatic Surface Modification of Textiles Advantages(+): + igh Degree of Improving ydrophilicity + Minimal Fiber Damage + Milder and Gentle Process + Relatively uniform performance + Less water pollution Disadvantages(-): - Relatively Expensive - Sensitive to skin urrent ydrophilization Methods Parameters Plasma Methods Alkaline Enzymatic Degree of improving hydrophilicity igh igh igh Processing cost igh Low igh < Plasma Water consumption o igh Relatively low hemical usage o igh Low Waste water o igh Low Elevated temperature Low igh Low Fiber damage (Weight & Strength) Low > Enzymatic igh Low Scalability/uniformity Poor Good Good September 17, 2016 Zhejiang Sci-Tech University 7 September 17, 2016 Zhejiang Sci-Tech University 8 2

3 bjective The present work was undertaken with the aim to estimate the potential use of Subtilisin for treating Polyamide 6,6 fibers to find an environmental friendly new method to improve its hydrophilicity. Relatively Low Production ost Easy to obtain Limited study + 2 September 17, 2016 Zhejiang Sci-Tech University 9 n n Materials Polyamide 6,6 (PA 6,6) knitted fabric, 269 g/m 2 Industrial solution of Subtilisin (Savinase) Sodium ydroxide (a) Experimental DSZ-300A, Rotary shaking water bath X-ray Photoelectron Spectroscopy (XPS), K-Alpha, Thermo Fisher Scientific, USA YG031D-500, Ball Burst Tester Equipments KRÜSS DSA 20, Water ontact Angle Analyzer Scanning Electron Microscope, JSM-5610Lv Datacolor SF 600, Spectrophotometer Phabrometer3, nu ybertek Inc September 17, 2016 Zhejiang Sci-Tech University 10 Treatment onditions - Wettability Results and Discussions Untreated 38 sec September 17, 2016 Zhejiang Sci-Tech University 11 Peak Performance at 50 to 55 o. Better performance from neutral to weak alkaline p range. September 17, 2016 Zhejiang Sci-Tech University 12 3

4 Wettability and Moisture Regain apillary eight a (5 g/l) sec a (5 g/l) % Greatest wettability and moisture regain improvement between 3% to 6%(owf). Alkali treatment gets moisture regain higher than Enzymatic but the wicking time is relatively same. Subtilisin treatment resulted higher capillary impact than a. September 17, 2016 Zhejiang Sci-Tech University 13 September 17, 2016 Zhejiang Sci-Tech University 14 Surface hemistry Elemental Analysis by XPS Untreated Subtilisin a T (%) Untr Sub a % 16.63% 15.28% n + 2 n September 17, 2016 Zhejiang Sci-Tech University 15 September 17, 2016 Zhejiang Sci-Tech University 16 4

5 Absorbance 9/17/2016 XPS spectra of 1s peaks Surface Morphology Untreated Subtilisin a Untreated Subtilisin a ew Peak ew Peak n Subtilisin shows a fairly milder treatment evidenced by the absence of etches, carves and roughness on the surface. September 17, 2016 Zhejiang Sci-Tech University 17 September 17, 2016 Zhejiang Sci-Tech University 18 Wool Reactive Dyeing Wool Reactive Dyeing y = x R² = Dye oncentration (%) September 17, 2016 Zhejiang Sci-Tech University 19 September 17, 2016 Zhejiang Sci-Tech University 20 5

6 Reactive Dyeing Exhaustion olor Strength Table: K/S Values of Lanasol Red 5B (2%owf) Dyed Samples at 570 nm Untreated Subtilisin 10% (owf) a 5 g/l 2.22 (±0.03) 3.93 (±0.05) 4.85 (±0.05) K/S September 17, 2016 Zhejiang Sci-Tech University 21 September 17, 2016 Zhejiang Sci-Tech University 22 olor Fastness Physio-Mechanical Properties Table: olor Fastness to Wash olor hange Staining Acetate otton ylon Polyester Acrylic Wool Untreated Subtilisin a *Wash fastness: class 1, very poor; class 2, poor; class 3, fair; class 4, good; and class 5, excellent Both treatments have some weight loss and strength loss but enzyme one is better. September 17, 2016 Zhejiang Sci-Tech University 23 September 17, 2016 Zhejiang Sci-Tech University 24 6

7 Whiteness Index Pilling and Abrasion Resistance igher Whiteness loss in Alkaline than Enzymatic treated. Sample Pilling Rating Untr 4 Subtilisin 4-5 a 4-5 September 17, 2016 Zhejiang Sci-Tech University 25 September 17, 2016 Zhejiang Sci-Tech University 26 Fabric andle Analysis onclusion a - igher fiber damage - igher mass loss - igher fabric strength loss - Lower capillary height - Greater fabric yellowing - More waste water - arsh process Subtilisin + Improves Wettability + Moisture Regain + apillary Movement + Minimal Fabric Damage + Minimal hemical Waste + Less waste water + Milder and Gentle Process ***Subtilisin may be used as a sustainable ydrophilization alternative. September 17, 2016 Zhejiang Sci-Tech University 27 September 17, 2016 Zhejiang Sci-Tech University 28 7

8 Acknowledgements The Textile Association, India hinese Government Scholarship ouncil ZSTU BUFT September 17, 2016 Zhejiang Sci-Tech University 29 September 17, 2016 Zhejiang Sci-Tech University 30 8