NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 30
·13329-13339
·
IF 3.591
Dong Wang,Yang Wang,Xuhui Zhang,Ting Li,Mingliang Du,Mingqing Chen,Weifu Dong
Bio-based flame retardants (FRs) have drawn increasing attention for FR polylactide (PLA). Hence, a green and facile method was presented in this work for the synthesis of melamine phytate (MPA), melamine copper phytate (MPACu), melamine zinc phytate (MPAZn), and melamine magnesium phytate (MPAMg). In general, the PLA/MPAZn composite exhibited a better flame retardancy and smoke suppression with an acceptable mechanical property. With the addition of 20 phr MPAZn, the peak of heat release rate (PHRR) was decreased by 45.0% compared with that of neat PLA. Also, TSR of the PLA/MPAZn composite was the lowest among the FR PLA composites in this study. Furthermore, the higher quality char residues played the key role in the synergistic flame retardancy and smoke suppression for the PLA/MPAZn composites. In addition, in this work, we found that the mass loss rate (MLR) was highly related to the heat release rate (HRR).
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2019
·
IF 3.78
Yu-Yang Gao,Cong Deng,Yuan-Yuan Du,Sheng-Chao Huang,Yu-Zhong Wang
Phytic acid mainly exists in seeds, roots and stems of plants, which has a potential value in flame-retarding polymers due to the high content of phosphorus. In this work, a novel bio-based phytic acid salt PHYPI was prepared through a salt formation reaction between phytic acid and piperazine . The structure of the bio-based PHYPI was verified using 1 H NMR spectrascoppy. When PHYPI was used to fabricate flame-retardant polypropylene (PP), it showed high efficiency in combustion tests. The limiting oxygen index (LOI) value for PP containing 18.0 wt% PHYPI is 25.0%, showing a 38.9% increase compared to 18.0% for PP containing no additive. Moreover, it passed the UL-94 V-0 rating in the vertical burning test, superior to the no rating for pure PP. Obviously, the flame-retarding efficiency of PHYPI is higher than that of typical traditional intumescent flame retardant containing ammonium polyphosphate or pentaerythritol . Cone calorimeter test revealed that the heat release and smoke production of PP were efficiently restrained by the presence of PHYPI. The peak of heat release rate (PHRR), total heat release (THR), and the peak of smoke release rate (PSPR) for PP containing 20 wt% PHYPI were decreased by 65.6%, 13.5%, and 32.8%, respectively, compared to the same values for PP alone. Fourier transform infrared spectroscopy (FTIR) was used to investigate the changes which accompanied the thermal degradation of the polymer containing PHYPI. Changes in the infrared spectra for the polymer undergoing degradation indicate that structures containing C=C and P-N-C were formed as a consequence of the presence of PHYPI. These transformations enhanced char formation to provide condensed phase protective action. At the same time, non-combustion volatile gases such as water and carbon dioxide may be released to dilute the fuel load in the gas phase. All evidences illustrate that PHYPI is an effective flame retardant for PP.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Fangzhou Hu,Xin He,Weize Lv,Yong Fang,Guodong Jiang,Yucai Shen
Manganese phytate decorated kaolinite (PA-Mn@Kaol) was synthesized as a novel flame retardant synergist in combination with piperazine pyrophosphate (PAPP) for polyethylene (PE). It demonstrated that the addition of PA-Mn@Kaol significantly reduced the total heat release, peak heat release rate, and total smoke production. Notably, the fire growth index (FGI) of PE/PAPP/PA-Mn@Kaol composites decreased by 66.7% relative to the PE/PAPP composite, and the PE/PAPP/PA-Mn@Kaol composites had great advantages in terms of FGI and fire performance index compared to other PE/intumescent flame retardant systems reported in the literature. Moreover, the gas and condensed phases fire retardant mechanisms of the PE/PAPP/PA-Mn@Kaol composite were explored. This study presented a viable approach for designing synergistic fire retardants, effectively enhancing the fire safety performance of PE.
研究领域:
材料科学
·
消防安全
✓ 已验证
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2016
·
IF 4.569
Xiaojuan Chen,Guangfeng Zeng,Taotao Gao,Zhaoyu Jin,Yajie Zhang,Hongyan Yuan,Dan Xiao
Electrochemical water splitting in an alkaline electrolyte for large-scale hydrogen production is currently a hot research topic. However, developing high-performance and durable oxygen-evolving electrocatalysts is an ongoing challenge. In this work we prepared Ni-phytate thin films with a bubble-like structure on Ni-foam through an in situ growth process. The resulting material can be used as an oxygen-evolving electrode in basic media without requiring the use of a conductive binder. The Ni-phytate electrode has high catalytic activity ( η j = 10 mA cm − 2 = 280 mV) and good stability (the current activity remained 95% after 5 h) towards OER. This is an effective approach to simplifying the large-scale preparation of catalysts for water-splitting applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Dezheng Sun,Fayong Li,Junwei Jin,Sangar Khan,Kamel Mohamed Eltohamy,Miaomiao He,Xinqiang Liang
Developing effective modification methods and obtaining a comprehensive understanding of adsorption mechanisms are essential for the practical application of biochars for the removal of heavy metals from solutions. In this study, rice straw was impregnated with sodium phytate and pyrolyzed at 350 °C, 450 °C, and 550 °C to synthesize modified biochars (i.e., MBC350, MBC450, and MBC550). The Cd(II) adsorption capacities and contributions of different mechanisms, including the effects of biochar-derived dissolved organic matter (BDOM), were investigated using batch sorption experiments and characterization analyses. The modification of sodium phytate promoted the pyrolysis of biomass, thereby increasing the BDOM content and aromatic structures at low and high pyrolysis temperatures, respectively. Moreover, the modification also increased the exchangeable Na + and carbonate contents in the modified biochars. Compared with the raw biochars, the Cd(II) adsorption capacities of modified biochars increased by 3.3–4.3 times, and MBC550 had the highest Cd(II) adsorption capacity (126.5 mg/g), of which precipitation with minerals and interaction with π-electrons contributed 41.7% and 45.8%, respectively. However, at a lower pyrolysis temperature, the Cd(II) adsorption attributed to ion exchange and co-deposition with BDOM significantly increased, especially on MBC350 (33.9 and 12.6 mg/g, respectively). These results indicate that modification by sodium phytate effectively enhanced various adsorption mechanisms, thereby increasing the Cd(II) adsorption capacity. In addition, the contribution of co-deposition with BDOM to adsorption was unneglectable for the biochars pyrolyzed at low temperatures.
研究领域:
环境科学
·
土壤修复
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Duo Yang,Miaomiao Chen,Jing-He Yang
Phytic acid (PA) is a six-fold dihydrogenphosphate ester of inositol with cost-effective, environmentally friendly, and safe properties. Here, we successfully synthesize the dehydroxyl cobalt phytate (PA-Co-400) using PA as phosphorus sources by a one-pot wet-chemistry strategy to prepare the precursor PA-Co and then heat treatment at 400 °C under an N 2 atmosphere for dehydroxylation. The average diameter, specific surface area, surface element distribution, and catalytic activity of the catalyst are significantly affected by dehydroxylation temperature. The specific surface area increases first and then decreases with the treatment temperature from 200 °C to 600 °C. The SEM results indicate that the average diameter of PA-Co-400 particle is 68.90 nm. The as-prepared samples are used as an anode catalyst for electrocatalytic oxygen evolution reaction (OER). The PA-Co-400 exhibits splendid OER performances with an overpotential of 310.31 mV at j 10 (η 50 = 349.35 mV, η 100 = 367.20 mV), which are even comparable to commercial RuO 2 (η 10 = 310.54 mV, η 50 = 389.80 mV, η 100 = 450.60 mV). Moreover, the PA-Co-400 has a small Tafel slope of 53.27 mV dec −1 , which is lower than commercial RuO 2 (81.71 mV dec −1 ). The ultra-long durability of PA-Co-400 was tested for over 80 h at current densities of 10 mA cm −2 without a significant reduction in 1 M KOH.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2018
·
IF 6.603
Jiaqi Huang,Shu Xiong,Qingwu Long,Liang Shen,Yan Wang
Proper draw solution is a crucial factor to generate a high performance in FO process. In this study, a phytic acid and its salt (PA-Na) were evaluated as novel draw solutes in FO process. The effects of the solution pH and concentration on the physicochemical properties were investigated systematically. Using 0.45 M PA-Na draw solution (pH = 7) and DI water feed solution, a relative high water flux of 19.02 LMH and a low solute flux of 0.51 gMH can be obtained, with HTI-TFC membrane in the PRO mode. An even better performance of a 30.35 LMH water flux and a 0.61 gMH solute flux can be achieved using the self-made HPAN-TFC membrane. The comparison of PA-Na and NaCl draw solutions shows that PA-Na draw solution has a much lower draw solute leakage and a competitive water flux. In addition, the application of PA-Na draw solution for the brackish water desalination was explored. The diluted PA-Na draw solution after FO may be used directly in food production by further dilution. In general, the non-toxicity and satisfactory FO performance of this food additive demonstrate its great potential as a draw solute for FO applications.
研究领域:
食品科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Yang Wang,Dong Wang,Mengfei Zhang,Dong Wang,Ting Li,Jie Jiang,Mingqing Chen,Weifu Dong
Highly efficient flame retardants for polylactic acid (PLA) are not easy to prepare, let alone fully bio-based ones. Herein, the furfurylamine phytate (PAF) was simply fabricated using phytic acid and furfurylamine in the ethanol solutions. Furthermore, the PAF could provide PLA with high flame retardancy with low loadings. The flame retardancy of PLA/PAF composites was investigated by the limited oxygen index (LOI), vertical burning tests, and cone calorimeter tests. The PLA containing 2 phr PAF showed the highest LOI value (around 34.2%) and self-extinguished without igniting cotton in the vertical burning test. Meanwhile, the peak of heat release and total heat release decreased compared with the neat PLA. Moreover, the PLA/PAF 1.5 composite could achieve the balance between the mechanical property and flame retardancy. This findings provided a facile and green method for fully bio-based flame-retardant PLA composites to expand the practical applications of PLA, such as electrics, building, and transportation.
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
APPLIED CLAY SCIENCE
·
2025
·
IF 5.8
Xianliang Li,Yawei Shao,Yanqiu Wang,Junyi Wang
In this work, a montmorillonite (MMT)-based composite coating with long-term corrosion protection for mild steel was prepared. This composite coating incorporated the montmorillonite@polydopamine@cerium phytate (MMT@PDA@PACe) nanofiller, prepared by the easily layer-by-layer surface assembly method. Electrochemical impedance spectroscopy (EIS) and surface morphology studies showed that the prepared composite coating exhibited long-term protective performance, self-healing performance, and good integrity. In this instance, on the one hand, two-dimensional (2D) MMT could block the path of corrosive media penetrating the coating. Also, organic modification of PDA and PACe could enhance the dispersibility and compatibility of inorganic MMT fillers, thus enhancing the coating barrier effect. On the other hand, composite materials could perceive corrosion reactions and actively release corrosion inhibitors to improve corrosion resistance performance further. The coating's self-healing performance and release characteristics of corrosion inhibitors were investigated by the EIS and inductively coupled plasma optical emission spectrometer (ICP-OES) tests. Moreover, after 60 d immersion, the |Z| 0.01 Hz value of the 0.5 wt% MMT@PDA@PACe composite coating was over 10 9 Ω·cm 2 , which is 3 orders of magnitude higher than that of the bare coating. Simultaneously, the adhesive force studies were applied to the composite coatings, and the results illustrated that the coating had the highest dry conditions adhesion force with 5.43 MPa and the lowest adhesion force loss rate at 14.1 % after 30 d of immersion.
研究领域:
材料科学
·
表面工程
·
腐蚀防护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
·
2024
·
IF 3.6
Kainan Yu,YaChao Wang,Shuqi Zhang,JiangPing Zhao
Titanium powder easily accumulates during industrial processes, and its high reactivity poses unavoidable hazards to both industrial operations and human safety. To suppress the explosion of titanium powder, zinc phytate (Zn-PA) and chitosan (CS) are mixed and prepared into a new bio-inhibitor using hydrothermal-solvothermal synthesis. The suppression effects of Zn-PA@CS bio-powder on the explosion pressure and temperature of titanium powder under different inerting ratios (α) are investigated using a 20 L spherical explosion testing system. The results show that when the α of Zn-PA@CS bio-powder is 0.8, the maximum explosion pressure ( P max ) and the maximum rate of pressure rise (( dP / dt ) max ) of titanium powder decrease by 82.8% and 91.2%, respectively. Moreover, the maximum flame temperature ( T p ) drops from the initial 647 °C–38 °C. Combined with TG-DSC analysis, Zn-PA@CS bio-powder produces phosphorus-containing substances during high-temperature thermal decomposition, which consume a large number of free radicals essential for the explosion. Furthermore, Zn-PA@CS bio-powder generates solid and gaseous substances, leading to the formation of a dense carbonaceous residue that covers the titanium powder, acts as an effective barrier, and dilutes oxygen concentration, thereby further inhibiting the explosion reaction. The Zn-PA@CS bio-powder exhibits a synergistic effect in both physical and chemical suppression. This study provides technical support for developing biomass explosion suppression powder and for preventing and controlling explosion accidents in industrial production.
研究领域:
工业安全
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 11
·4531-4546
·
IF 3.665
Sujie Yang,Bing Zhang,Mengru Liu,Yadong Yang,Xinliang Liu,Depeng Chen,Bibo Wang,Gang Tang,Xiuyu Liu
Using phytic acid (PA) and piperazine (Pi) as raw materials, piperazine phytate (PA-Pi) was fabricated by simple ionic reaction. Furthermore, A series of rigid polyurethane foam/piperazine phytate (RPUF/PA-Pi) composites were prepared by one-step water-blown technology. Thermogravimetric (TG) results showed that the addition of PA-Pi improved the thermal stability of RPUF/PA-Pi composites at high temperature. At 700°C, RPUF/PA-Pi20 exhibited the highest carbon residue of 25.8 wt%. Cone calorimetry and smoke density tests suggested that PA-Pi could reduce the heat and smoke release during combustion process of the composites, thus reducing their fire hazard. Thermogravimetric-Fourier transform infrared spectroscopy (TG-FTIR) indicated that PA-Pi significantly inhibited the release of toxic gases (isocyanate compounds, aromatic compounds, CO and HCN) and flammable gases (hydrocarbons and esters) during the decomposition process of RPUF/PA-Pi composites, effectively improving fire performance of the composites. Scanning electron microscope (SEM), Raman and Fourier transform infrared spectroscopy (FTIR) were used to characterize the carbon residue of RPUF/PA-Pi composites. The results showed that PA-Pi could promote the formation of dense carbon layer of composites and effectively prevented heat and mass transfer in the combustion process.
研究领域:
材料科学
·
燃烧学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Chang Wu,Zong-Xing Wu,Shu-Jin Long,Xi Luo,Xian-Wei Cheng,Jin-Ping Guan
The development of sustainable and durable flame-retardant protein silk fabric without compromising its physical properties is of interest but challenging. In this study, a fully biobased reactive flame-retardant, vanillin phytate, was synthesized from biomass phytic acid and vanillin. Subsequently, vanillin phytate was covalently grafted onto silk fabrics along with diethyl phosphite under mild conditions via the Kabachnik–Fields reaction. The chemical structure of vanillin phytate and its potential cross-linking mechanism with silk fibers, thermal stability, combustion behavior, flame retardancy, washing durability, and mode of action of the modified silk fabrics were investigated. The modified silk exhibited a significant reduction in heat and smoke release by 63.8 % and 90 %, respectively, versus pristine silk. The modified silk fabrics also demonstrated excellent self-extinguishing capacity, with a reduced damaged length of 7.0 cm and an increased limiting oxygen index of over 34 %. Furthermore, the modified silk fabric maintained self-extinguishing performance after 25 washing cycles, showing high flame-retardant efficiency and good washing durability. The char residue analyses revealed that the modification primarily exerted its flame-retardant effect in the condensed phase. Interestingly, the present strategy had less influence on the physical performance of silk fabrics, indicating a wide range of practical applications.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）