Biodegradable and sustainable fibres i Related titles from Woodhead’s textile technology list: Regenerated cellulose fibres (ISBN-13: 978-1-85573-459-3; ISBN-10: 1-85573-459-1) Bast and other plant fibres (ISBN-13: 978-1-85573-684-9; ISBN-10: 1-85573-684-5) Green composites (ISBN-13: 978-1-85573-739-6; ISBN-10: 1-85573-739-6) Environmental impact of textiles (ISBN-13: 978-1-85573-541-5; ISBN-10: 1-85573-541-5) Handbook of nonwovens (ISBN-13: 978-1-85573-603-1; ISBN-10: 1-85573-603-9) Details of these books and a complete list of Woodhead’s textile technology titles can be obtained by: ∑ visiting our website at www.woodheadpublishing.com ∑ contacting Customer Services (e-mail: [email protected]; fax: +44 (0) 1223 893694; tel.: +44 (0) 1223 891358, ext. 30; address: Woodhead Publishing Limited, Abington Hall, Abington, Cambridge CB1 6AH, England) ii Biodegradable and sustainable fibres Edited by R. S. Blackburn CRC Press Boca Raton Boston New York Washington, DC W OODHEAD PUBLISHING LIMITED Cambridge England iii Published by Woodhead Publishing Limited in association with The Textile Institute Abington Hall, Abington, Cambridge CB1 6AH, England www.woodheadpublishing.com Published in North America by CRC Press LLC, 6000 Broken Sound Parkway, NW, Suite 300, Boca Raton, FL 33487, USA First published 2005, Woodhead Publishing Limited and CRC Press LLC © 2005, Woodhead Publishing Limited; 2005, Chapter 13 © Mary M. Brooks The authors have asserted their moral rights. Every effort has been made to trace and acknowledge ownership of copyright. The publishers will be glad to hear from the copyright holders whom it has not been possible to contact concerning the following: Figs 10.1–10.14, 13.1, 13.4, 13.6, 13.8, 13.9, 13.11 and 13.12. This book contains information obtained from authentic and highly regarded sources. Reprinted material is quoted with permission, and sources are indicated. 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Project managed by Macfarlane Production Services, Dunstable, Bedfordshire (email: [email protected]) Typeset by Replika Press Pvt Ltd, India Printed by T J International Limited, Padstow, Cornwall, England iv Contents Contributor contact details xi Introduction xv R S BLACKBURN, University of Leeds, UK 1 Microbial processes in the degradation of fibers 1 P M FEDORAK, University of Alberta, Canada 1.1 Introduction 1 1.2 Background and terminology 1 1.3 Incubation conditions used for studying biodegradation of fibers and films 8 1.4 Sources of microorganisms and enzymes for laboratory incubations 12 1.5 Analytical methods used to assess biodegradation of fibers and films 17 1.6 Examples of types of bonds that are susceptible to enzymatic attack 24 1.7 Future trends 29 1.8 Acknowledgements 31 1.9 References 31 2 Bast fibres (flax, hemp, jute, ramie, kenaf, abaca) 36 R KOZLOWSKI, P BARANIECKI and J BARRIGA-BEDOYA, Institute of Natural Fibres, Poland 2.1 Introduction 36 2.2 Flax 37 2.3 Hemp 51 2.4 Jute 60 2.5 Ramie 70 2.6 Kenaf 78 2.7 Abaca 81 v vi Contents 2.8 Comparison of fibre properties 86 2.9 References 86 3 Alginate fibers 89 J M MURI and P J BROWN, Clemson University, USA 3.1 Introduction 89 3.2 The chemical nature of alginate materials 92 3.3 Physical properties of alginate-based materials 96 3.4 Industrial applications of alginates 100 3.5 Fabrication of alginates as useful flexible substrates in medical textile-based products 101 3.6 Alginates in bioengineering 105 3.7 References 107 4 Cellulosic fibres and fabric processing 111 D CIECHAÑSKA, Institute of Chemical Fibres, Poland and P NOUSIAINEN, Tampere University of Technology, Finland 4.1 Introduction 111 4.2 Life cycle assessment (LCA) 112 4.3 The mechanisms of enzymatic reactions on wood and cellulose 120 4.4 Biodegradability of cellulose fibres in textile blends 131 4.5 Biotechnology for manufacture and modification of cellulosic fibres 133 4.6 Enzyme applications in fabric and dyestuff processing 140 4.7 Hygienic and medical fibres 144 4.8 Future trends 150 4.9 References 151 5 Lyocell fibres 157 P WHITE, M HAYHURST, J TAYLOR and A SLATER, Lenzing® Fibers Ltd, Derby, UK 5.1 Introduction 157 5.2 Process description 159 5.3 Lyocell sustainability 165 5.4 Lyocell fibre properties 171 5.5 Lyocell in textiles 172 5.6 Lyocell – a versatile, high performance fibre for nonwovens 181 5.7 Marketing 187 5.8 Future trends 188 5.9 Sources of further information 188 Contents vii 6 Poly(lactic acid) fibers 191 D W FARRINGTON, Consultant, UK, J LUNT, S DAVIES, NatureWorks LLC, USA and R S BLACKBURN, University of Leeds, UK 6.1 Introduction 191 6.2 Chemistry and manufacture of PLA polymer resin 192 6.3 PLA fiber properties 197 6.4 Applications 200 6.5 Environmental sustainability 211 6.6 Future trends 218 6.7 References 219 7 Poly(hydroxyalkanoates) and poly(caprolactone) 221 I CHODÁK, Polymer Institute of the Slovak Academy of Sciences, Slovakia, and R S BLACKBURN, University of Leeds, UK 7.1 Introduction 221 7.2 PHA-based oriented structures 222 7.3 Poly(caprolactone)-based fibres 232 7.4 Structure of drawn fibres 235 7.5 Thermal properties 236 7.6 Enzymatic and hydrolytic degradation 237 7.7 Other biodegradable and sustainable polyesters 238 7.8 Application of polyester-based biodegradable fibres 239 7.9 Future trends and concluding remarks 241 7.10 References 242 8 The route to synthetic silks 245 F VOLLRATH and A SPONNER, University of Oxford, UK 8.1 Introduction 245 8.2 Silk structures 245 8.3 Development of fibre: the feedstock 248 8.4 Development of fibre: spinning 255 8.5 Performance characteristics 256 8.6 Applications 262 8.7 Future trends 262 8.8 Acknowledgements 264 8.9 References and sources of further information 264 9 Biodegradable natural fiber composites 271 A N NETRAVALI, Cornell University, USA 9.1 Introduction 271 9.2 Biodegradable fibers 274 9.3 Biodegradable resins 279 viii Contents 9.4 Soy protein-based green composites 295 9.5 Conclusions and future trends 304 9.6 Acknowledgements 304 9.7 References 305 10 Biodegradable nonwovens 310 G BHAT, University of Tennessee, USA and H RONG, Johnson Controls Inc., USA 10.1 Introduction 310 10.2 Nonwoven fabrics 311 10.3 Fiber consumption in nonwovens 314 10.4 Web formation methods 315 10.5 Web bonding techniques 319 10.6 Technology and relative production rate 321 10.7 Recent research on biodegradable nonwovens 322 10.8 Applications of biodegradable nonwovens 336 10.9 Flushable nonwovens 337 10.10 Leading producers of nonwovens 338 10.11 Sources of further information and advice 338 10.12 References 340 11 Natural geotextiles 343 C LAWRENCE, University of Leeds, UK and B COLLIER, University of Tennessee, USA 11.1 Introduction 343 11.2 Fundamental aspects of geotextiles 344 11.3 Fibres used for natural geotextile products 345 11.4 Fibre extraction and preparation 351 11.5 Production of natural geotextile products 355 11.6 Measurement of the properties of natural geotextiles 362 11.7 References 365 12 Conversion of cellulose, chitin and chitosan to filaments with simple salt solutions 367 H S WHANG, N AMINUDDIN, Fiber and Polymer Science Program, USA, M FREY, Cornell University, USA, S M HUDSON and J A CUCULO, Fiber and Polymer Science Program, USA 12.1 Introduction 367 12.2 Cellulose in liquid ammonia/ammonium thiocyanate solutions 368 12.3 Fibers from chitin and chitosan 380 12.4 Future trends 393 12.5 Sources of further information 394 Contents ix 12.6 References 395 13 Soya bean protein fibres – past, present and future 398 M M BROOKS, University of Southampton, UK 13.1 Introduction 398 13.2 The soya bean plant 398 13.3 Naming regenerated protein fibres 400 13.4 The need for new fibre sources 401 13.5 Generalised method for producing soya bean fibre in the mid-twentieth century 413 13.6 Contemporary research into alternative protein fibre sources 420 13.7 Contemporary methods for producing fibres from soya bean protein 422 13.8 Fibre characteristics 425 13.9 Identifying soya bean protein fibres 428 13.10 Degradation behaviour 431 13.11 A truly biodegradable and ecological fibre? 434 13.12 Conclusion 434 13.13 Acknowledgements 435 13.14 References 435 Index 441