Facile synthesis of an eco-friendly nitrogen–phosphorus ammonium salt to enhance the durability and flame retardancy of cotton

Jia, Yaling; Lü, Yi; Zhang, Guang‐Xian; Liang, Yaojia; Zhang, Fengxiu

doi:10.1039/c7ta01106g

Cited by 134 publications

(43 citation statements)

References 40 publications

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“…As shown in Figure 6 a,b, both Cotton-PDTSP-1T and Cotton-PDTSP-2T began to degrade at 279 °C ( T 5% , the temperature at 5 wt % weight loss) and the maximum rate degradation temperature ( T max ) appeared at 319 °C. These temperatures were lower than control fabrics and might be due to the dehydration of cellulose catalyzed by phosphorus/polyphosphoric acid generated from PDTSP during thermal degradation [ 31 , 32 ]. However, over 60% and 30% of char residue at T max and 800 °C could remain for Cotton-PDTSP-1T and Cotton-PDTSP-2T, and they were much higher than control cotton (43% and 11%), which indicated that PDTSP could greatly improve the thermal stability and char-forming properties of cotton fabrics.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Mechanism of Flame-Retardant Cotton Fabric with Phosphoramidate Siloxane Polymer through Multistep Coating

Wang

et al. 2020

Polymers

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To improve the water solubility of phosphoramidate siloxane and decrease the amount of flame-retardant additives used in the functional coating for cotton fabrics, a water-soluble phosphoramidate siloxane polymer (PDTSP) was synthesized by sol-gel technology and flame-retardant cotton fabrics were prepared with a multistep coating process. A vertical flammability test, limited oxygen index (LOI), thermogravimetric analysis, and cone calorimetry were performed to investigate the thermal behavior and flame retardancy of PDTSP-coated fabrics. The coated cotton fabrics and their char residues after combustion were studied by attenuated total reflection infrared spectroscopy (FTIR-ATR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). All results presented that PDTSP-coated cotton fabrics had good flame retardancy and char-forming properties. PDTSP coating was demonstrated to posess gas-phase flame-retardant mechanism as well as a condensed phase flame-retardant mechanism, which can be confirmed by thermogravimetric analysis-Fourier transform infrared spectroscopy (TG-IR) and cone calorimetry test. Also, the preparation process had little effect on the tensile strength of cotton fabrics, although the air permeability and whiteness had a slight decrease. After different washing cycles, the coated samples still maintained good char-forming properties.

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Section: Resultsmentioning

confidence: 99%

Preparation and Mechanism of Flame-Retardant Cotton Fabric with Phosphoramidate Siloxane Polymer through Multistep Coating

Wang

et al. 2020

Polymers

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“…There are two widely used and representative industrialized phosphorous‐containing flame retardants namely Pyrovatex and Proban, both of them have excellent flame retardancy and durability . But they will release formaldehyde and corrosive hydrogen halide gas if for long‐term use, which unable to meet the requirements of modern environmental safety, so that restrict their application.…”

Section: Introductionmentioning

confidence: 99%

A Phosphorous‐Aluminium‐Nitride Synergistic Flame Retardant to Enhance Durability and Flame Retardancy of Cotton

et al. 2019

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In this paper, a Phosphorous ‐ Aluminium ‐ Nitride synergistic flame retardant (PAN) was synthesized by phosphoric acid, glycerol, aluminium sulfate and urea, though a one‐pot process. The PAN was durably grafted onto the surface of cotton fabric by the simple process of soak‐dry‐cure. At the same time, the synergistic effect of the aluminium element and Phosphorous ‐ Nitrogen flame retardants (PN) was investigated. The flame‐retardant effect is the best when the conttent of alumium is 2.5 mol% (percentage of phosphoricacid) in PAN. The analyses of FTIR and XPS results suggested that PAN was grafted onto the cotton by forming a strong P−O‐C covalent bond on the surface of fiber. The SEM and Whiteness test proved that the flame‐retardant finishing cotton fabric do possess good morphology and whiteness. The thermal stability and flame retardancy of the PAN treated cotton fabric were assessed by TG and vertical flammability test. Then, found the aluminium sulfate in PAN had synergistic effect, and the PAN had significant flame retardancy in application.

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“…A component of white vinegar, 3–7 wt % acetic acid, is responsible for the enhanced degradation of CFs. The acid is regarded as a catalyst to promote the dehydration of cellulose . We used an aqueous solution containing acetic acid (3 wt %) instead of white vinegar as the invisible ink, to investigate whether acetic acid could trigger the color change (experimental results are shown in Figure S14 in the Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…The acid is regarded asacatalyst to promote the dehydration of cellulose. [33,34] We used an aqueous solution containing acetic acid (3 wt %) insteado fw hite vinegara st he invisible ink, to investigate whether acetic acid could trigger the color change (experimentalr esults are shown in Figure S14 in the Supporting Information). The acetic acid treated CF/HAPNW paper exhibited the same color-changing behavior with an aqueous solution of acetic acid as that with white vinegari nr esponse to fire.…”

Section: Abbreviationmentioning

confidence: 99%

Secret Paper with Vinegar as an Invisible Security Ink and Fire as a Decryption Key for Information Protection

Chen

Zhu

Zhang

et al. 2019

Chemistry A European J

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Security inks based on photoluminescent materials are mostly investigated for security applications, such as information encryption and decryption, anti‐counterfeiting, and data storage. Although they are invisible to the naked eye under ambient light, they can be detected under ultraviolet or near‐infrared light. Herein, a new kind of secret paper made from network‐structured ultralong hydroxyapatite nanowires and cellulose fibers has been developed. White vinegar, a common cooking ingredient, is used as an invisible security ink. Covert information on the secret paper written with white vinegar is totally invisible under natural light, but it can be decrypted and clearly read after exposure to fire; the response time to fire is short (<10 s). The ways of writing on the secret paper are diverse by using various pens loaded with white vinegar.

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Facile synthesis of an eco-friendly nitrogen–phosphorus ammonium salt to enhance the durability and flame retardancy of cotton

Abstract: An eco-friendly AEGDP flame retardant reacted with –OH groups from cotton to enhance the durability and flame retardancy of cotton fibers.

Cited by 134 publications

References 40 publications

Preparation and Mechanism of Flame-Retardant Cotton Fabric with Phosphoramidate Siloxane Polymer through Multistep Coating

Preparation and Mechanism of Flame-Retardant Cotton Fabric with Phosphoramidate Siloxane Polymer through Multistep Coating

A Phosphorous‐Aluminium‐Nitride Synergistic Flame Retardant to Enhance Durability and Flame Retardancy of Cotton

Secret Paper with Vinegar as an Invisible Security Ink and Fire as a Decryption Key for Information Protection

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