Journal
CARBOHYDRATE POLYMERS
Volume 181, Issue -, Pages 833-840Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.11.069
Keywords
Phosphorylated chitosan; Flame retardancy; Polyamide 6.6 fabrics; UV grafting; Sol-gel treatment
Categories
Funding
- National Natural Science Foundation of China [51573173]
- National Key Research and Development Program of China [2016YFC0802802]
- Fundamental Research Funds for the Central Universities [WK2320000032]
- CAS
- TWAS
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Phosphorylated chitosan (PCS) was synthesized and grafted onto the surface of polyamide 6.6 (PA 6.6) fabrics via UV-induced grafting polymerization in order to improve the flame retardant properties. Subsequently, PCS grafted PA 6.6 fabrics were modified by (3-aminopropyl) triethoxysilane (APTES) through sol-gel process in order to form a cross-linking coating. The results obtained from the vertical burning test indicated that only the PCS grafted and simultaneously sol-gel treated fabrics could stop the melt dripping. A maximum reduction (30%) in the peak heat release rate was achieved for the PA6.6-PCS-4W-SG fabric sample. The optimal flame retardant effect was achieved for the PA6.6 fabrics treated by PCS and APTES simultaneously, which was attributed to the joint effect of thermal shielding exerted by the silica and char-forming effect derived from PCS.
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