The flame retardancy properties of cotton have been enhanced by exploiting an optimized multistep sol-gel process, consisting of a pre-hydrolysis step, followed by consecutive depositions of hybrid phosphorus-doped silica layers, using DPTS as precursor of the oxidic phases. Upon optimization, it has been demonstrated that just one phosphorus-doped silica layer is able to strongly reduce the heat release rate (-52 %), and the total smoke release (-56 %) and its rate (-62 %) with respect to the untreated fabric. In addition, the deposition of three layers allows achieving a higher flammability resistance if compared to a single layer, as indicated by the final residue after the flammability tests. As far as flammability resistance is concerned, the new coatings have shown a good durability when subjected up to five washing cycles according to ISO 6330 standard.
The role of pre-hydrolysis on multi step sol-gel processes for enhancing the flame retardancy of cotton / J. Alongi, C. Colleoni, G. Rosace, G. Malucelli. - In: CELLULOSE. - ISSN 0969-0239. - 20:1(2013 Feb), pp. 525-535. [10.1007/s10570-012-9806-1]
The role of pre-hydrolysis on multi step sol-gel processes for enhancing the flame retardancy of cotton
J. Alongi
;
2013
Abstract
The flame retardancy properties of cotton have been enhanced by exploiting an optimized multistep sol-gel process, consisting of a pre-hydrolysis step, followed by consecutive depositions of hybrid phosphorus-doped silica layers, using DPTS as precursor of the oxidic phases. Upon optimization, it has been demonstrated that just one phosphorus-doped silica layer is able to strongly reduce the heat release rate (-52 %), and the total smoke release (-56 %) and its rate (-62 %) with respect to the untreated fabric. In addition, the deposition of three layers allows achieving a higher flammability resistance if compared to a single layer, as indicated by the final residue after the flammability tests. As far as flammability resistance is concerned, the new coatings have shown a good durability when subjected up to five washing cycles according to ISO 6330 standard.File | Dimensione | Formato | |
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