, Volume 25, Issue 8, pp 4791–4803 | Cite as

Finishing of cotton fabrics by multi-layered coatings to improve their flame retardancy and water repellency

  • Longxiang Liu
  • Zunchu Huang
  • Ying Pan
  • Xin Wang
  • Lei Song
  • Yuan Hu
Original Paper


In this study, we finished cotton fabrics with polyethylenimine (PEI)/melamine and phytic acid (PA) by layer-by-layer assembly to enhance their flame retardant properties. Subsequently, the flame retardant treated cotton fabrics were impregnated with a diluted solution of poly(dimethylsiloxane) (PDMS) for improving water repellent behavior. The morphology and chemical composition of un-treated and treated cotton fabrics were measured by scanning electron microscopy equipped with Energy Dispersive X-ray analysis. Thermogravimetric analysis indicated that the addition of melamine/PEI–PA coating induced earlier degradation of cotton fabrics to form char, and the presence of PDMS further improved the char yield. The flame retardant property was significantly enhanced as evidenced by the self-extinguishing behavior of Cotton-4BL and Cotton-4BL-PDMS fabrics in the vertical burning tests. The peak heat release rates of the treated cotton fabrics were decreased by more than 50% in contrast to that of the original cotton. The significant improvement in flame retardancy was attributed to the catalytic effect of the melamine/PEI–PA coating on char formation and the char stabilization effect of PDMS. The char layer with good thermal resistance played a crucial role in suppressing flame spread. The Cotton-4BL-PDMS fabrics also exhibited good water repellent behavior, which displayed an initial contact angle larger than 130° and almost unchanged over time.


Cotton fabric Layer-by-layer assembly Flame retardancy Water repellency 



We gratefully acknowledge financial support from the National Key Research and Development Program of China (Grant No. 2016YFC0802802), and the National Natural Science Foundation of China (Grant Nos. 51573173, 21604081).

Supplementary material

10570_2018_1866_MOESM1_ESM.docx (94 kb)
Supplementary material 1 (DOCX 93 kb)


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© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Fire ScienceUniversity of Science and Technology of ChinaHefeiPeople’s Republic of China
  2. 2.Institute of Environmental Materials and Applications, College of Materials and Environmental EngineeringHangzhou Dianzi UniversityHangzhouPeople’s Republic of China

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