CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Shutong Fan,Xun Gao,Yuan Liu,Layun Deng,Yong Wang,Xiazhen Li,Xianjun Li
This research synthesized a novel all-biobased, highly flame-retardant and smoke-suppressing flame retardant through the reaction of ammonium phytate (PAAn) and succinic acid-modified β-cyclodextrin (SA-β-CD). In the synthesis process, only deionized water was used as the solvent, conforming to the current requirements for eco-friendly approaches. The results showed that under the synergistic effect of PAAn and SA-β-CD, the thermal stability and flame retardancy of the wood were significantly enhanced. Thermogravimetric analysis (TG) indicated that the char yield of the PAAn-SA-β-CD2@DW reached 40.24 %. The peak heat release rate (PHRR) and total heat release (THR) were reduced by 91.78 % and 84.41 %. The PAAn-SA-β-CD2@DW sample was not ignited in the cone calorimeter test, and its fire growth index (FGI) value was only 0.094 kW/m 2 ·s, which was 97.37 % lower than that of the untreated wood. The synergistic effect of PAAn and SA-β-CD was found to promote the formation of non-combustible gases, and the generation of a dense protective char layer on the wood surface during combustion. This inhibits the diffusion of oxygen and heat, imparting the significantly improved fire resistance to the treated wood. This study provides a simple and eco-friendly synthesis approach, which broadens the scope of application of phytic acid and β-cyclodextrin.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fangyuan Xiao,Xiaoke Wang,Kaitong Sun,Qian Zhao,Cuiping Han,Hai-Feng Li
Corrosion and the formation of by-products resulting from parasitic side reactions, as well as random dendrite growth, pose significant challenges for aqueous zinc-ion batteries (AZIBs). In this study, phytate ammonium is introduced into the traditional dilute Zinc sulfate electrolyte as a multi-functional additive. Leveraging the inherent zincophilic nature of the phytic anion, a protective layer is formed on the surface of the zinc anode. This layer can effectively manipulate the deposition process, mitigate parasitic reactions, and reduce the accumulation of detrimental by-products. Additionally, the competitive deposition between dissociated ammonium ions and Zn 2+ promotes uniform deposition, thereby alleviating dendrite growth. Consequently, the modified electrolyte with a lower volume addition exhibits superior performance. The zinc symmetric battery demonstrates much more reversible plating/stripping, sustaining over 2000 h at 5 mA cm −2 and 1 mA h cm −2 . A high average deposition/stripping efficiency of 99.83 % is achieved, indicating the significant boosting effect and practical potential of our strategy for high-performance aqueous zinc-ion batteries.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 16
·9699-9710
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IF 4.21
Zhu Wenju,Hao Shuaishuai,Yang Mingyang,Cheng Bowen,Zhang Jimei
Abstract In the present research, a glycosyl cross-linking coordination chelate flame retardant was designed to enhance durable flame retardancy of cotton fabrics. It was a halogen-free, non-formaldehyde boron acid and phytic acid ammonium salt synergistic flame-retardant system. The flame retardancy and durability of flame retardants prepared by different saccharides were investigated. Results showed that raffinose was the best cross-linking reagent compared with the other monosaccharides and oligosaccharides. The r affinose as cross-linking reagent prepared g lycosyl cross-linking b oron acid and a mmonium salt of p hytic acid flame retardant (r-GBAP) (100 g/L) can obtain the shortest char length of 56 mm and the largest limiting oxygen index (LOI) value of 37.4%. A lower r-GBAP concentration can get good flame retardancy, due to adopt the three curing cycles process. FTIR, XPS, LOI, TG and SEM testing and characterization techniques were used to analyze and research the flame retardancy, durability, thermal oxidation stability and flame-retardant mechanisms of r-GBAP and the treated cotton fibers. Graphic abstract
研究领域:
材料科学
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纺织工程
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阻燃技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Tinghao Wu,Yingqi Gu,Dong Zhao,Guodong Jiang,Tingwei Wang,Yucai Shen
Paper-based materials have become increasingly prevalent in the packaging and daily life. However, paper is flammable and hydrophilic, hindering its widespread application. Here, a novel reactive flame retardant of m-xylylenediamine phytate ammonium (MPAP) was prepared. Cellulose paper with superior flame-retardant and hydrophobic properties was successfully prepared by surface spraying technology and impregnation process, through the reaction of flame retardant and poly(methylhydrosiloxane) (PMHS) with cellulose fibers. The water contact angle (WCA) of the modified paper was 122.6°, while the limit oxygen index (LOI) value reached 41 %, which had significant self-extinguishing performance. The total heat release rate of the modified paper was reduced from 12.8 kJ/g to 0.6 kJ/g. The modified paper also exhibited excellent performance for oil/water separation. Furthermore, this effective and simple strategy can also be applied to other cellulose-contained substrates for the application in construction, textiles, furniture and other fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Chang Wang,Min Hu,Yanji Wu,Haiyun Ma,Jianzhong Xu
Biomass-derived cellulose aerogels have garnered significant attention in recent years due to their renewability and sustainability. Here, we introduce a completely biomass typha orientalis fibers (TOFs) based aerogel which possesses excellent flame retardancy and fire warning performance. Both cellulose and lignin were effectively preserved to maximize the utilization of the biomass TOFs during the pretreatment. The TOFs were then crosslinked with the biomass flame retardant ammonium phytate. The resulting TOFs based aerogel possesses a low density (48 mg/cm 3 ) and excellent thermal insulation properties. Meanwhile, robust flame retardancy was also achieved, its UL-94 rating easily reaches V-0 grade, with a limiting oxygen index (LOI) as high as 78 %. In addition, based on the stable phosphorus doping char structure during combustion, the TOFs based aerogel also shows fire warning performance. It can respond quickly upon flame and continue to trigger alarm for up to 1.5 h. Moreover, the resulting TOFs based aerogel demonstrates excellent reusability in fire early warning up to 30 times. The present full biomass-based aerogel not only provide a fire warning capability but also contribute to the suppression of flame spread, thereby enhancing the overall safety.
研究领域:
材料科学
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高分子科学
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消防安全工程
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可持续化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）