Yiqi Yang, Ph.D.

Yiqi Yang

Contact Information:

East Campus (Lincoln)
221 Home Economics Building

Charles Bessey Professor
Professor of Textiles
Professor of Biological Systems Engineering

Academic Degrees

  • Ph.D., Textile Science, Purdue University
  • M.E., Textile Chemical Engineering, Donghua University


  • 60% Research (BSE 15%; TMFD 45%);
  • 30% Teaching
  • 10% Service

Areas of Research and Professional Interest

  • Biobased Materials
  • Polymers and Fibers
  • Green Processes for Fibers and Soft Materials

Research Profiles:


  • Yang, Yiqi, Xu, Helan, Song, Kaili. Effective hair styling compositions and processes. US Patent 10,828,246. November 10, 2020.
  • Yang, Yiqi, and Reddy, Narendra. Method for making natural cellulosic fiber bundles from cellulosic sources. US Patent 7,887,672, Feb. 15, 2011.
  • Fan, Qinguo, Yang, Yiqi, Ugbolue, Samuel C., and Wilson, Alton R. Methods of enhancing dyeability of polymers. US Patent 6,646,026, November 11, 2003.
  • Berkstresser, IV, G.A., Dunbar, R.A., McLellan, G.R., Plischke, L.M.W., and Yang, Y.Q. Removing color from Ionically Dyed Recyclable Polymeric Materials. US Patent 6,083,283, July 4, 2000.
  • Yang, Y.Q., Plischke, L.M.W., McLellan, G.R., and Dickerson, J.L. Process for Separating Polyamide from Colorant in Recycling of Colored Polyamide Materials, Especially Carpets. US Patent 6,036,726, March 14, 2000.
  • Ladisch, M.R., Kohlman, K.L., Westgate, P.L., Weil, J.R., and Yang, Y.Q.  Processes for Treating Cellulosic Material. US Patent 5,846,787, December 8, 1998. 
  • Yang, Y.Q., and Li, S. A Process for Increasing the Crease Resistance of Silk Textiles and a Resulting Crease Resistant Textile. US Patent 5,296,269, March 22, 1994.

Selected Publications

Selected Refereed Journal Articles

(Complete list: https://scholar.google.com/citations?hl=en&user=ljwP&user=ljwP-_kAAAAJ)

  1. Mu, B.N. and Yang*, Y.Q. Complete separation of colorants from polymeric materials for cost-effective recycling of waste textiles. Chemical Engineering Journal. 427. 131570 (11 pgs) (2022).
  2. Mu, B.N., Wu, Q.M., Xu, L. and Yang*, Y.Q. A sustainable approach to synchronous improvement of wet-stability and toughness of chitosan films. Food Hydrocolloids. 123. 107138 (8 pgs) (2022).
  3. Liu, L.Y., Mu, B.N., Li, W., Xu*, H.L., Yang, J. and Yang* Y.Q. Clean cotton dyeing in circulated dyebath of waste cooking oil: A feasible industrialization strategy for pollution minimization. Journal of Cleaner Production. 278. 123799 (9 pages) (2021).
  4. Mu, B.N., Hassan, F., and Yang*, Y.Q.  Controlled assembly of secondary keratin structures for continuous and scalable production of tough fibers from chicken feathers. Green Chemistry. 22(5), 1726-1734 (2020).
  5. Mi, X., Mu, B.N., Li, W., Xu, H.L. and Yang*, Y.Q. From poultry wastes to quality protein products via restoration of secondary structure with extended disulfide linkages. ACS Sustainable Chemistry & Engineering. 8(3). 1396-1405 (2020).
  6. Mu, B.N., Hassan, F., Wu, Q.M. and Yang*, Y.Q.  Ductile keratin/deacetylated chitin composites with nanoparticle-induced formation of ordered and entangled structures. Composites Science and Technology. 200. 108462 (7 pages) (2020).      
  7. Liu, L.Y., Mu, B.N., Li*, W., and Yang* Y.Q. A semi-stable emulsion system based on spent cooking oil for pilot-scale reactive dyeing with minimal discharges. ACS Sustainable Chemistry & Engineering. 7(16). 13698-13707 (2019).
  8. Mu, B.N., Liu, L.Y., Li, W., and Yang*, Y.Q.  A water/cottonseed oil bath with controlled dye sorption for high dyeing quality and minimum discharges. Journal of Cleaner Production. 236. 117566 (10 pages) (2019).
  9. Mu, B.N., Xu, H.L., Li, W., Xu, L. and Yang*, Y.Q. Spinnability and Rheological Properties of Globular Soy Protein Solution. Food Hydrocolloids. 90. 443-451(2019).
  10. Zhu, X.Y., Hou*, X.L., Ma, B.M., Xu, H.L., and Yang*, Y.Q. Chitosan/Gallnut tannins Composite Fiber with Improved Tensile, Antibacterial and Fluorescence properties. Carbohydrate Polymers. 226. 115311 (8 pages) (2019).
  11. Mi, X., Chang, Y., Xu*, H.L. and Yang*, Y.Q. Valorization of keratin from food wastes via crosslinking using non-toxic oligosaccharide derivatives. Food Chemistry. 300. 125181 (7 pages) (2019).
  12. Liu, L.Y., Mu, B.N., Li*, W., and Yang* Y.Q. Cost-effective reactive dyeing using spent cooking oil for minimal discharge of dyes and salts. Journal of Cleaner Production. 227. 1023-1034 (2019).
  13. Li, W., Mu, B.N., and Yang*, Y.Q. Feasibility of industrial-scale treatment of dye wastewater via bio-adsorption technology. Bioresource Technology. 277, 157-170 (2019).
  14. Mu, B.N., Xu, H.L., Li, W. and Yang*, Y.Q. Quantitation of fast hydrolysis of cellulose catalyzed by its substituents for potential biomass conversion. Bioresource Technology. 273, 305-312(2019).
  15. Mu, B.N., Li, W., Xu, H.L., Xu, L. and Yang*, Y.Q. Freeze-Extrusion for Controllable Assembly of 3-Dimensional Ultra-Fine and Amorphous Fibrous Matrices: Potential Applications in Sorption. Journal of Materials Chemistry A. Materials for Energy and Sustainability. 6(22). 10320-10330(2018).
  16. Pan, G.W., Xu*, H.L., Mu, B.N., Ma, B.M. and Yang*, Y.Q.  A clean approach for potential continuous mass production of high-molecular-weight polylactide fibers with fully stereo-complexed crystallites. Journal of Cleaner Production. 176. 151-158(2018).
  17. Pan, G.W., Xu*, H.L., Mu, B.N., Ma, B.M., Yang, J., and Yang*, Y.Q. Complete stereo-complexation of enantiomeric polylactides for scalable continuous production. Chemical Engineering Journal.  328. 759-767 (2017).
  18. Hou*, X.L., Fang, F.F., Guo, X.L., Jakpa, W., Ma, B.M. Tao, Y.Y., Yang*, Y.Q. Potential of Sorghum Husk Extracts as a Natural Functional Dye for Wool Fabrics. ACS Sustainable Chemistry & Engineering. 5(6) 4589-4597(2017).
  19. Song, K.L., Xu, H.L., Xie, K.L., and Yang*, Y.Q. Keratin-based biocomposites reinforced and crosslinked with dual-functional cellulose nanocrystals. ACS Sustainable Chemistry & Engineering5(7), 5669-5678(2017).
  20. Song, K.L., Xu, H.L., Xu, L., Xie, K.L., and Yang*, Y.Q. Preparation of cellulose nanocrystal-reinforced keratin bioadsorbent for effective removal of dyes from aqueous solution. Bioresource Technology. 232. 254-262 (2017).
  21. Song, K.L., Xu, H.L., Mu, B.N., Xie, K.L., and Yang*, Y.Q. Non-toxic and clean crosslinking system for protein materials: effect of extenders on crosslinking performance. Journal of Cleaner Production. 150. 214-223 (2017).  
  22. Liu, P.C., Xu, H.L., Zhao, Y. and Yang*, Y.Q. Rheological properties of soy protein isolate solution for fibers and films. Food Hydrocolloids. 64. 149-156 (2017).
  23. Dong, Z., Hou, X.L., Haigler, I., and Yang*, Y.Q. Preparation and properties of cotton stalk bark fibers and their cotton blended yarns and fabrics. Journal of Cleaner Production. 139. 267-276 (2016).
  24. Pan, G.W., Zhao, Y., Xu, H.L., Ma, B.M. and Yang*, Y.Q. Acoustical and Mechanical Properties of Thermoplastic Composites from Discarded Carpets. Composites Part B-Engineering99. 98-105 (2016).
  25. Xu, H.L., Yang, M.P., Hou, X.L., Li, W., Su, X.Z., and Yang*, Y.Q. Industrial trial of high-quality all green sizes composed of soy-derived protein and glycerol. Journal of Cleaner Production.  135. 1-8(2016).
  26. Liu, J., Wang, B.J., Xu, X.M., Chen, J.G., Chen, L.Y., and Yang*, Y.Q. Green Finishing of Cotton Fabrics Using Xylitol-Extended Citric Acid Cross-linking System on a Pilot Scale. ACS Sustainable Chemistry & Engineering. 4(3), 1131-1138 (2016).
  27. Pan, G.W., Zhao, Y., Xu, H.L., Hou, X.L., and Yang*, Y.Q. Compression Molded Composites from Discarded Nylon 6/Nylon 6,6 Carpets for Sustainable Industries. Journal of Cleaner Production. 117. 212-220 (2016).
  28. Xu, S.X., Chen, J.G., Wang, B.J., and Yang*, Y.Q. An Environmentally Responsible Polyester Dyeing Technology Using Liquid Paraffin. Journal of Cleaner Production. 112. 987-994 (2016).
  29. Xu, H.L., Canisag, H. and Yang*, Y.Q. Robust and Flexible Films from 100% Starch Crosslinked by Non-Toxic Disaccharide Derivative. ACS Sustainable Chemistry & Engineering. 3(11). 2631-2639 (2015).
  30. Xu, S.X., Chen, J.G., Wang, B.J. and Yang*, Y.Q. Molecular Surface Area Based Predictive Models for the Adsorption and Diffusion of Disperse Dyes in Polylactic Acid Matrix. Journal of Colloid and Interface Science. 458, 22-31 (2015).
  31. Mu, B.N., Xu, H.L., and Yang*, Y.Q., Accelerated hydrolysis of substituted cellulose for potential biofuel production: kinetic study and modeling. Bioresource Technology. 196, 332-338(2015).
  32. Xu, S.X., Chen, J.G., Wang, B.J., and Yang*, Y.Q. Sustainable and Hydrolysis-Free Dyeing Process for Polylactic Acid Using Non-Aqueous Medium. ACS Sustainable Chemistry & Engineering. 3(6) 1039-1046 (2015). Cover Report.
  33. Ma, Z.Z., Pan, G.W., Xu, H.L., Huang, Y.L., Yang*, Y.Q. Cellulosic fibers with high aspect ratio from cornhusks via controlled swelling and alkaline penetration. Carbohydrate Polymers. 124. 50-56 (2015).
  34. Zhao, Y., Zhao, Y.Z., Xu, H.L., and Yang*, Y.Q.  A Sustainable Slashing Industry Using Biodegradable Sizes from Modified Soy Proteins to Replace Petro-Based Poly(vinyl alcohol). Environmental Science & Technology. 49(4). 2391-2397(2015).
  35. Ye, T., Wang, B.J., Liu, J., Chen, J.G., Yang*, Y.Q.  Quantitative Analysis of Citric Acid/Sodium Hypophosphite Modified Cotton by HPLC and Conductometric Titration. Carbohydrate Polymers. 121. 92-98 (2015).
  36. Hou, X.L., Sun, F., Yan, D., Xu, H.L., Dong, Z., Li, Q., and Yang*, Y.Q.  Preparation of Lightweight Polypropylene Composites Reinforced by Cotton Stalk Fibers from Combined Steam Flash-Explosion and Alkaline Treatment. Journal of Cleaner Production. 83. 454-462 (2014).
  37. Shi, Z., Reddy, N., Hou, X.L., and Yang*, Y.Q.  Tensile Properties of Thermoplastic Feather Films Grafted with Different Methacrylates. ACS Sustainable Chemistry & Engineering. 2(7), 1849-1856(2014).
  38. Xu, H.L., and Yang*, Y.Q.  Controlled de-crosslinking and disentanglement of feather keratin for fiber preparation via a green process. ACS Sustainable Chemistry & Engineering. 2(6) 1404-1410(2014).
  39. Reddy, N., Zhang, Y., and Yang*, Y.Q. Corn Distillers Dried Grains as Sustainable and Environmentally Friendly Warp Sizing Agents. ACS Sustainable Chemistry & Engineering. 1(12), 1564-1571(2013).
  40. Chen, L.H., Reddy, N., and Yang*, Y.Q.  Remediation of Environmental Pollution by Substituting Poly(vinyl alcohol) with Biodegradable Warp Size from Wheat Gluten. Environmental Science & Technology. 47(9) 4505-4511(2013).
  41. Ma, H., Xu, H.L., Qu, J., Bian W., Zhong, Y. Reddy, N., Yang, Y.Q.,  and Mao*, Z. Self-assembly of covalently bonded nano-silicates with controllable modulus and thermal stability. Composites Science and Technology. 87 118-125 (2013).
  42. Huda, S., Reddy, N. and Yang*, Y.Q. Ultra-Light-Weight Composites from Bamboo Strips and Polypropylene Web with Exceptional Flexural Properties. Composites Part B-Engineering. 43(3)1658-1664 (2012).
  43. Xu, H.L. Jiang, Q.R., Reddy, N., and Yang*, Y.Q.  Hollow Nanoparticles from Zein for Potential Medical Applications. Journal of Materials Chemistry. 21(45)18227-18235(2011) .
  44. Reddy, N. and Yang*, Y.Q. Potential of Plant Proteins for Medical Applications, Trends in Biotechnology.  29(10)490-498(2011).
  45. Reddy, N., Hu, C.Y., Yan, K., and Yang*, Y.Q. Acetylation of Corn Distillers Dried Grains. Applied Energy. 88(5) 1664-1670(2011).
  46. Zou, Y., Reddy, N. and Yang*, Y.Q. Reusing Polyester/Cotton Blend Fabrics for Composites. Composites Part B-Engineering. 42(4) 763-770 (2011).
  47. Jiang, Q.R., Reddy, N., and Yang*, Y.Q.  Cytocompatible Crosslinking of Electrospun Zein Fibers for the Development of Water Stable Tissue Engineering Scaffolds. Acta Biomaterialia. 6(10) 4042-4051(2010).
  48. Zou, Y., Huda, S., and Yang*, Y.Q. Light-Weight Composites from Long Wheat Straw and Polypropylene Web. Bioresource Technology, 101(6) 2026-2033 (2010).
  49. Reddy, N. and Yang*, Y.Q. Citric Acid Crosslinking of Starch Films. Food Chemistry. 118(3) 702-711 (2010).  
  50. Reddy, N., and Yang*, Y.Q. Natural Cellulose Fibers from Soybean Straw. Bioresource Technology. 100(14), 3593-3598(2009).
  51. Reddy, N. and Yang*, Y.Q. Properties of Natural Cellulose Fibers from Hop Stems. Carbohydrate Polymers. 77(4), 898-902 (2009).
  52. Reddy, N., and Yang*, Y.Q. Properties and Potential Applications of Natural Cellulose Fibers from the Bark of Cotton Stalks. Bioresource Technology. 100(14), 3563-3569(2009).
  53. Xu, W.J., Reddy, N. and Yang*, Y.Q. Extraction, Characterization and Potential Applications of Cellulose in Corn Kernels and Distillers' Dried Grains with Solubles (DDGS). Carbohydrate Polymers. 76(4), 521-527 (2009).
  54. Reddy, N. and Yang*, Y. Characterizing natural cellulose fibers from velvet leaf (Abutilon theophrasti) stem. Bioresource Technology. 99(7), 2449-2454(2008).
  55. Huda, S. and Yang*, Y.Q. Composites from Ground Chicken Quill and Polypropylene. Composites Science and Technology. 68(3-4), 790-798 (2008).
  56. Karst, D, Nama, D. and Yang*, Y.Q. Effect of Disperse Dye Structure on Dye Sorption onto PLA Fiber. Journal of Colloid and Interface Science. 310(1), 106-111 (2007).
  57. Reddy, N. and Yang*, Y.Q. Properties and potential applications of natural cellulose fibers from cornhusks. Green Chemistry, 7(4), 190 – 195 (2005). Cover Page Feature of the research.
  58. Reddy, N. and Yang*, Y.Q. Biofibers from agricultural byproducts for industrial applications. Trends in Biotechnology, 23(1) 22-27 (2005).

Books Authored and Edited

  1. Yang, Y.Q., Yu, J.Y., Xu, H.L., and Sun, B.Z. edited book. Porous Lightweight Composites Reinforced with Fibrous Structures. 368 p. 4 parts, 13 Chapters. 140 Figures and 39 Tebles. Published by Springer-Verlag Berlin Heidelberg, Germany.  (Heidelberger Platz 3, 14197 Berlin, Germany). ISBN 978-3-662-53802-9; ISBN 978-3-662-53804-3 (eBook). DOI 10.1007/978-3-662-53804-3. Library of Congress Control Number 2016962702. Copyright Springer-Verlag GmbH Germany 2017.
  2. Reddy, N., and Yang, Y.Q. authored book. Innovative Biofibers from Renewable Resources. 454 p. 10 parts, 75 Chapters and 210 illustrations. Springer-Verlag Berlin Heidelberg, Germany. ISBN 978-3-662-45135-9; ISBN 978-3-662-45136-6 (eBook). DOI 10.1007/978-3-662-45136-6. Springer Heidelberg, New York, Dordrecht, London. Library of Congress Control Number 2014957175. Copyright Springer-Verlag Berlin Heigelberg. 2015.
  3. Yang, Y.Q., Xu, H.L. and Yu, X. edited book. Lightweight Materials from Biopolymers and Biofibers. ACS Symposium Series 1175. Copyright: American Chemical Society, Washington, DC. USA. October 21, 2014. 299pp. ISBN: 978-0-8412-2990-7; eISBN: 978-0-8412-2997-6; DOI: 10.1021/bk-2014-1175.