Construction of a sustainable, reactive and phytate-based intumescent flame-retardant for silk textile. (May 2023)

• Record Type: Journal Article
• Authors: Cheng, Xian-Wei; Song, Jia-Yi; Dong, Shuang; Guan, Jin-Ping
• Is Part Of: Polymer degradation and stability. Volume 211(2023)
• Publication Date: 2023-05
• Subjects: Flame retardancy -- Functional coating -- Silk -- Thermal stability -- Intumescent -- Washing durability; FR flame retardant -- PPEDTE pentaerythritol phytate ethylenediaminetetraacetic ester -- PA phytic acid -- PER pentaerythritol -- EDTA ethylenediaminetetraacetic acid -- SHP sodium hypophosphite -- ATR-FTIR Attenuated total reflection Flourier transformed infrared -- SEM scanning electron microscope -- TG thermogravimetry -- PCFC pyrolysis combustion flow calorimetry -- LOI limiting oxygen index -- Ds specific optical density -- Dsmax maximum Ds -- HRR heat release rate -- pHRR peak HRR -- THR total heat release; Polymers -- Deterioration -- Periodicals; Stabilizing agents -- Periodicals; Polymères -- Dégradation -- Périodiques; Stabilisants -- Périodiques; 668.9
• DOI: 10.1016/j.polymdegradstab.2023.110339
• Languages: English
• ISSNs: 0141-3910

Abstract

Highlights: Sustainable and reactive pentaerythritol phytate ethylenediaminetetraacetic acid ester (PPEDTE) intumescent flame-retardant is synthesized. PPEDTE coating is grafted on silk surface through covalent reaction. PPEDTE coating has high flame retardancy and durability on silk textile. PPEDTE coating offers an eco-friendly and durable flame-retardant approach for silk in practical applications. Abstract: The exploitation of plant-derived phytic acid as effective and durable flame retardant (FR) for textiles is of great significance for developing novel and ecological functional textile products. In the present study, a reactive and phytate-based FR namely pentaerythritol phytate ethylenediaminetetraacetic ester (PPEDTE) prepared by the esterification of phytic acid, pentaerythritol and ethylenediaminetetraacetic acid was investigated as intumescent FR agent for silk fabric. The chemical structure of PPEDTE and its potential grafting mechanism on silk were studied. The thermal stability, heat and smoke suppression property, flame retardancy and washing resistance on silk fabric were studied. The deposition and covalently cross-linked PPEDTE on silk fabric enabled it to self-extinguish in vertical burning test. The coated silk fabric with an add-on of higher than 10.7% could withstand 15 washing cycles, displaying good washing durability. The intumescent FR coating remarkably decreased the release of heat and smoke of silk during burning. The coated silk had high thermal stability and left significant combustion residues after the burning tests. These results demonstrate that the synthesized PPEDTE warrant potential as efficient and reactive intumescent FR approach for silk. Graphical abstract: Image, graphical abstract