Chitosan/sodium polyborate based micro-nano coating with high flame retardancy and superhydrophobicity for cotton fabric

Qi, Peng; Wang, Shuheng; Wang, Wenjia; Sun, Jun; Yuan, Hairong; Zhang, Sheng

doi:10.1016/j.ijbiomac.2022.02.062

Cited by 72 publications

(22 citation statements)

References 48 publications

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“…In the case of the O 1s spectrum, the same peaks can be detected in both PLA/4APP@CS and PLA/4APP@CS@Si, in which the peak at 533. 19 For the P 2p spectrum of both samples, the peak at 133.6 eV appearing before char formation could be mainly assigned to P−O−P, 39 but after char formation, it changed to 134.2 eV, which belongs to P−O−C. 39 This indicates that the P element mainly exists in the structure of P−O−C in the char.…”

Section: ■ Results and Discussionmentioning

confidence: 91%

“…For the C 1s spectra of PLA/4APP@CS in Figure A, three different binding energies at 284.8, 286.3, and 289.0 eV are assigned to C–C/CC, C–O, and CO, respectively, which are similar to those of PLA/4APP@CS@Si. In the case of the O 1s spectrum, the same peaks can be detected in both PLA/4APP@CS and PLA/4APP@CS@Si, in which the peak at 533.1 and 531.6 eV are attributed to −O– existing in C–O–P and C–O–C groups and O existing in CO and PO groups, respectively . For the P 2p spectrum of both samples, the peak at 133.6 eV appearing before char formation could be mainly assigned to P–O–P, but after char formation, it changed to 134.2 eV, which belongs to P–O–C .…”

Section: Resultsmentioning

confidence: 98%

“…The peak of the SPR showed a similar tendency to that of TSP, as shown in Figure S3. It could be explained by that a proper content of Si can effectively improve the structure and thermal stability of the char layer and make it more compact and stable, resulting in the less release of smoke. , This could be further manifested by the following analysis of the flame retardancy mechanism.…”

Section: Resultsmentioning

confidence: 99%

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Aqueous Self-Assembly of Bio-Based Flame Retardants for Fire-Retardant, Smoke-Suppressive, and Toughened Polylactic Acid

Liu

Yao

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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Incorporating bio-based flame retardants into polylactic acid (PLA) for improving its fire retarding performance has always been attractive to researchers worldwide, while the synthesis of bio-based flame retardants always involves organic solvents. The drawbacks of bio-based flame retardants are also nonignorable, such as strong hydrophilicity, aggregation, and deterioration of the mechanical properties of PLA. Here, the biobased flame retardant APP@CS@Si was assembled in the water phase with ammonium polyphosphates (APP) and chitosan (CS) and carboxylated silicone oil (Si-COOH/Si). The results showed that the Si-COOH shell not only decreased the hydrophilicity of the flame retardant but also had superior fire retardancy due to its improved char formation ability. Only 2 wt % APP@CS@Si can endow PLA with satisfying flame retardancy such as the UL-94 V-0 grade. Higher values of the fire propagation index (0.150) and flame retardancy index (1.33) were also achieved by PLA with 4 wt % APP@CS@Si compared with those of PLA with the same loading of APP@CS. Interestingly, the total smoke release amount (TSR) of PLA/4APP@CS@Si was 60% lower than that of PLA/ 4APP@CS, exhibiting its excellent smoke suppression ability. Moreover, Si-COOH could also be deemed as a soft shell to improve the toughness of PLA with increased impact strength and elongation at break of the PLA composite by 20 and 16%, respectively.

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Section: ■ Results and Discussionmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Aqueous Self-Assembly of Bio-Based Flame Retardants for Fire-Retardant, Smoke-Suppressive, and Toughened Polylactic Acid

Liu

Yao

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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“…[14] The TG-FTIR was further investigated to elucidate the gas-phase reactions of H-CMP at high temperatures. [15] As presented in Figure 2b, CC and CH cleavage fragments appear after 150 °C, which originates from the pyrolysis of the cross-linking agent TA. [8b,16] At the same time, the signal of PO fragments also appears and is further enhanced after 310 °C, which is due to the cleavage of the POC bonds and the phosphazene rings.…”

Section: Resultsmentioning

confidence: 99%

A Facile Immobilization Strategy for Soluble Phosphazene to Actualize Stable and Safe Lithium–Sulfur Batteries

Zhu

Chen

Liu

et al. 2022

Small

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Lithium–sulfur batteries (LSBs) have attracted extensive attention owing to their high energy density and abundant sulfur resources. However, LSBs are still restricted by the unsatisfactory electrochemical performance resulting from the shuttle effect of lithium polysulfide (LiPSs), and the potential fire hazard caused by inflammable ether electrolytes and polyolefin separators. Herein, a facile immobilization strategy for hexachlorocyclotriphosphazene (HCCP) is creatively applied to address the above issues simultaneously. Insoluble HCCP cross‐linked microspheres (H‐CMP) are firstly obtained at ambient temperature using tannic acid (TA) as a cross‐linking agent and then a multifunctional separator coating is constructed based on H‐CMP. The released phosphorus‐related radicals from H‐CMP in wide temperatures effectively prevent the combustion of electrolytes and separators, and hence improve the fire safety of the Li–S pouch cell. Furthermore, H‐CMP availably chemisorbs LiPSs to interdict the shuttle effect, thereby dramatically improving the electrochemical performance of LSBs. The effectiveness of this strategy is also verified in high sulfur loading (6.38 mg cm‐2), high temperature (50 °C), and Li–S pouch cells. More importantly, H‐CMP exhibits sufficient stability for Li metal and suppression of Li dendrites. This facile immobilization strategy for multifunctional phosphazenes provides a competitive option for the large‐scale fabrication of high‐safety and high‐performance LSBs.

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“…Hence, enhancing the water repellency of a cotton fabric surface is helpful to maintain long-term flame retardancy. Moreover, multifunctional cotton fabric with both flame-retardant and superhydrophobic properties has attracted considerable attention [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Superhydrophobic and Flame-Retardant Coatings on Cotton Fabrics

Xiong

et al. 2022

Polymers

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The hydrophilicity and inherent flammability of cotton textiles severely limit their usage. To solve these drawbacks, a superhydrophobic and flame-retardant (SFR) coating made of chitosan (CH), ammonium polyphosphate (APP), and TiO2-SiO2-HMDS composite was applied to cotton fabric using simple layer-by-layer assembly and dip-coating procedures. First, the fabric was alternately immersed in CH and APP water dispersions, and then immersed in TiO2-SiO2-HMDS composite to form a CH/APP@TiO2-SiO2-HMDS coating on the cotton fabric surface. SEM, EDS, and FTIR were used to analyze the surface morphology, element composition, and functional groups of the cotton fabric, respectively. Vertical burning tests, microscale combustion calorimeter tests, and thermogravimetric analyses were used to evaluate the flammability, combustion behavior, thermal degradation characteristics, and flame-retardant mechanism of this system. When compared to the pristine cotton sample, the deposition of CH and APP enhanced the flame retardancy, residual char, heat release rate, and total heat release of the cotton textiles. The superhydrophobic test results showed that the maximal contact angle of SFR cotton fabric was 153.7°, and possessed excellent superhydrophobicity. Meanwhile, the superhydrophobicity is not lost after 10 laundering cycles or 50 friction cycles. In addition, the UPF value of CH/APP@TiO2-SiO2-HMDS cotton was 825.81, demonstrating excellent UV-shielding properties. Such a durable SFR fabric with a facile fabrication process exhibits potential applications for both oil/water separation and flame retardancy.

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Chitosan/sodium polyborate based micro-nano coating with high flame retardancy and superhydrophobicity for cotton fabric

Cited by 72 publications

References 48 publications

Aqueous Self-Assembly of Bio-Based Flame Retardants for Fire-Retardant, Smoke-Suppressive, and Toughened Polylactic Acid

Aqueous Self-Assembly of Bio-Based Flame Retardants for Fire-Retardant, Smoke-Suppressive, and Toughened Polylactic Acid

A Facile Immobilization Strategy for Soluble Phosphazene to Actualize Stable and Safe Lithium–Sulfur Batteries

Facile Fabrication of Superhydrophobic and Flame-Retardant Coatings on Cotton Fabrics

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