POLYMERS FOR ADVANCED TECHNOLOGIES
·
2018
·Vol. 29
·期 11
·2774-2783
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IF 2.137
Siqi Huo,Jun Wang,Shuang Yang,Haopeng Cai,Bin Zhang,Xi Chen,Qilei Wu,Lingfeng Yang
In this paper, a triazine-based flame retardant (TAT) was synthesized from cyanuric chloride and aniline. Its chemical structure was characterized by Fourier transform infrared (FTIR) spectroscopy, 1 H nuclear magnetic resonance, and elemental analysis. Two kinds of novel intumescent flame-retardant epoxy systems were obtained with the incorporation of TAT and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) or hexa-phenoxy-cyclotriphosphazene (HPCP). The flame retardancy of the obtained epoxy samples was evaluated using limited oxygen index, vertical burning (UL94), and cone calorimeter tests. The results indicated that there was a synergistic effect between TAT and DOPO or HPCP. The flame-retardant mechanism was investigated by thermogravimetric analysis (TGA), thermogravimetric analysis/infrared spectrometry (TGA-FTIR) coupled with the morphology and chemical analysis of the char residues. During combustion, DOPO or HPCP decomposed to release phosphorus-containing free radicals with quenching effect. The morphology study showed that the introduction of DOPO or HPCP promoted the carbonization of epoxy matrix and the formation of a phosphorus-containing viscous char layer, while the pyrolysis gases derived from the decomposition of TAT caused the char layer to expand. The main reason of the promotion of flame retardancy of epoxy samples was that the simultaneous addition of TAT and DOPO or HPCP led to the formation of a compact and intumescent char layer that restricted the transfer of heat and combustible volatiles and simultaneously protected the underlying matrix.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Journal of Oleo Science
·
2025
·
IF 1.8
Guangqun Cao,Guofang Gao,Penghui Liang,Junxia Wang,Yilei Ruan,Zhiyong Hu,Hailin Zhu
Surface activity parameters such as critical micelle concentration (CMC), saturation adsorption (Гmax), and limiting molecular area (Amin) of three triazinyl bisquaternary ammonium salts with different hydrophobic chain lengths (C6-2-C6, C8-2-C8 and C12-2-C12) were analyzed from surface tension tests. The results showed that the CMC value of C12-2-C12 was much lower (0.026 mmol/L) than that of C6-2-C6 and C8-2-C8. The corrosion inhibition performances of three triazinyl bisquaternary ammonium salts on Q235 in 1 mol/L HCl solution were investigated by weight loss measurements and electrochemistry measurements. The results showed that the longer the hydrophobic chain length, the better the corrosion inhibition performance at the same concentration. The corrosion inhibition efficiencies of C12-2-C12, C8-2-C8 and C6-2-C6 at 0.2 mmol/L were 98.10%, 96.09% and 94.64%, respectively. Surface analysis and quantum chemical calculations showed that the three triazinyl bisquaternary ammonium salts can be adsorbed on the surface of carbon steel effectively to inhibit the corrosion of the carbon steel surface.
研究领域:
材料科学
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表面化学
·
腐蚀与防护
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2013
·
IF 2.206
Panyue Wen,Xiaofeng Wang,Weiyi Xing,Xiaming Feng,Bin Yu,Yongqian Shi,Gang Tang,Lei Song,Yuan Hu,Richard K. K. Yuen
A novel hyperbranched char foaming agent (HCFA), successfully synthesized via the polycondensation of 2-chloro-4,6-di-(2-hydroxyethylamino)-s-triazine (CHT), was combined with ammonium polyphosphate (APP) to endow polypropylene (PP) with flame retardance. The study of thermal stability of various PP composites showed that HCFA/APP system could effectively improve the thermal degradation and thermal-oxidative stability of the char residues, and PP3 containing 30 wt % APP/HCFA with a 3/1 weight ratio left the highest amount of char residue at 700 °C. The results of flammability revealed that PP3 had the most effective flame retardancy and lowest fire hazards. The investigation of structure and morphology of char residues indicated that the compact and foaming char layer, as a good barrier against the transmission of heat and volatiles, was formed for PP3 during combustion.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Materials
·
2018
·Vol. 11
·期 6
·937
·
IF 2.467
Ruoxin Yuan,Wenbin Kang,Chuhong Zhang
In an effort to explore the use of organic high-performance lithium ion battery cathodes as an alternative to resolve the current bottleneck hampering the development of their inorganic counterparts, a rational strategy focusing on the optimal composition of covalent triazine-based frameworks (CTFs) with carbon-based materials of varied dimensionalities is delineated. Two-dimensional reduced graphene oxide (rGO) with a compatible structural conformation with the layered CTF is the most suitable scaffold for the tailored mesopores in the polymeric framework, providing outstanding energy storage ability. Through facile ionothermal synthesis and structure engineering, the obtained CTF-rGO composite possesses a high specific surface area of 1357.27 m2/g, and when used as a lithium ion battery cathode it delivers a large capacity of 235 mAh/g in 80 cycles at 0.1 A/g along with a stable capacity of 127 mAh/g over 2500 cycles at 5 A/g. The composite with modified pore structure shows drastically improved performance compared to a pristine CTF, especially at large discharge currents. The CTF-rGO composite with excellent capacity, stability, and rate performance shows great promise as an emerging high-performance cathode that could revolutionize the conventional lithium-ion battery industry.Keywords:covalent triazine-based frameworks;carbon materials;graphene;lithium-ion batteries
研究领域:
材料科学
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能源技术
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产品关联
DOI
PubMed
高影响因子
POLYMER BULLETIN
·
2024
·
IF 3.1
Wang Yunfei,Gao Shanjun,Yin Nian,Chen Yuhan,Shen Chunhui,Yu Yi
A new hyperbranched charring-foaming agent (PCAT) containing triazine and triazole groups was successfully synthesized and characterized, and its special pyrolysis behavior was analyzed. It was combined with PAPP as an acid source to form an intumescent flame-retardant system. The composite with 20% flame retardants containing PAPP/PCAT (3:1) showed better flame-retardant and smoke suppression properties. The LOI of the PP/PAPP/PCAT composite increased to 30.2% and achieved UL-94 V-0 rating when the mass ratio of PAPP/PCAT was 3:1. In cone calorimetry experiments, it was demonstrated to reduce PHRR and THR by 84.7% and 48.9%, respectively. Meanwhile, the PSPR and TSP were also reduced by 77.9% and 56.2%, respectively, relative to PP. This indicates that the PP modified by partially doping PCAT in PAPP has significantly enhanced heat dissipation and smoke suppression performance, thus performing higher fire safety. In terms of FRI, PP/PAPP/PCAT composite was considered to be of “good” flame retardancy. Thermal gravimetric analysis demonstrated that PCAT significantly improved the char yield of PP when combined with PAPP. The morphology and properties of the residue showed that PP/PAPP/PCAT could produce a significant expanded foam insulating carbon layer, and the graphitization degree of the residual carbon was enhanced. The investigation of their water resistance demonstrated that the PP/PAPP/PCAT composite still obtained a UL-94 V-0 rating after 168-h soaking in water.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
CELLULOSE
·
2016
·Vol. 24
·期 2
·1077-1085
·
IF 3.195
Wang Lili,Wang Xiancheng,Shen Yifeng
A series of modified guar gums with s -triazine group (TSG) was successfully prepared using monochlorotriazine sulfanilic acid as modifier under certain conditions. The flowability, viscoelasticity, and thixotropy of TSG solutions were thoroughly studied through steady shear, dynamic strain sweep, and structural recovery tests. The results indicated that TSG exhibited better flowability, more viscous effects, and higher viscosity recoverability compared with guar gum (GG). The flow and viscous characteristics of TSG increased with increasing degree of modification. As thickeners in reactive printing of cotton, the paste add-on, color yield, and penetration of TSG were 54–80, 15–60, and 31–48% higher, respectively, compared with GG. TSG could obtain desirable large patterns with bright and even color as well as fine patterns with good outline sharpness, especially 0.4–1.0TSG. TSG has great potential as a substitute for sodium alginate in reactive printing of cotton.
研究领域:
材料科学
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纺织工程
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应用化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 3
·1031-1034
·
IF 3.925
Hao Guo,Yinsheng Liu,Ning Wu,Liping Peng,Xiaoqin Wei,Zongyan Lu,Zhiguo Yu,Wu Yang
A triazine-based fluorescent COF (MaTa-COF) was synthesized from inexpensive reactants. The obtained MaTa-COF has a large BET-specific surface area of 621.15 m2 g−1 and can be used as a highly sensitive Fe3+ fluorescent probe with a wide linear range of 0–250 μM and a low detection limit of 6.18 × 10−2 μM (Ksv = 2.34 × 108 M−1). Furthermore, the probe presented a good recyclability performance.
研究领域:
材料科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Chengwei Lu,Jun Han,Najun Li,Dongyun Chen,Qingfeng Xu,Hua Li,Jianmei Lu
Photocatalysis is a green and environmentally friendly method for degrading dangerous and nonbiodegradable pollutants. In this study, a sequence of metal-free triazine-based electronic donor–acceptor (D-A) conjugated polymers Tr-X (X = Th, BT, BTh) were prepared by D-A configuration regulation between triazine (Tr) and monomers containing N and S, such as thiophene (Th), bithiophene (BTh) and benzothiadiazole (BT) units, for the photocatalytic degradation of bisphenol A (BPA) and benzene contaminants in water under visible light. Among these, Tr-BTh exhibited complete photocatalytic degradation owing to its excellent D-A configuration. Moreover, the N and S atoms, which are rich in triazine and thiophene units, serve as highly dispersed reactive sites. The separation and transfer of photogenerated carriers can be further improved by expanding the light-absorption range of polymers. In addition, the polymers showed good adsorption for BPA and other aromatic organic pollutants through π-π interaction and surface hydrogen bonding, which provides a facile strategy for efficient polymer-based photocatalysts for water purification.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2022
·Vol. 147
·期 19
·10391-10401
·
IF 4.755
Tian Xiao-Shuang,Zhang Yue-Fei,Li Yan,Zhong Jin-Rong
In this research, a novel type of triazine-based char-forming agent (PTPA) was synthesized and combined with ammonium polyphosphate (APP) to form an intumescent flame retardant (IFR) system to prevent polypropylene (PP) burning. A commercialized char-forming agent was purchased and the same process was used to study its flame retardant performance on polypropylene, and the results were compared with those of this experiment. It was found that the PP/IFR samples in this experiment (APP/PTPA = 4/1–1/1) reached the increased limiting oxygen index (LOI) value of 29.5%, and passed the vertical combustion (UL-94) V-0 rating. The maximum LOI for the purchase of char-forming agent is 31.0%. Thermogravimetric analysis results show that the PTPA/APP system can improve the thermal stability and thermal oxidation stability of carbon slag. The carbon residue was further studied by visual observation and scanning electron microscopy. The dense coke residues formed hinder the transfer of gas and heat during the combustion process, and ultimately endow the PP/IFR system with higher flame retardancy.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Wei Xu,Wen Wang,Lifen Hao,Hongna Liu,Fang Hai,Xuechuan Wang
A novel triazine-based fluorinated diol, CC-F, was synthesized from cyanuric chloride (CC), octafluoropentanol (OFP), and ethanolamine (MEA). Subsequently, a series of fluorinated waterborne polyurethanes (CC-FPUF-n, n expressed as mass percentages of CC-F in product formula) were synthesized using CC-F as the chain extender. The chemical structure of the product was verified using the Fourier transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy techniques. The influence of the CC-F contents on the properties of the latex particles, surface properties, thermal stabilities, and mechanical properties of CC-FPUF films was determined using the transmission electron microscopy (TEM), dynamic light scattering (DLS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), atomic force microscopy (AFM), water contact angle (WCA), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and X-ray diffraction (XRD) techniques. Mechanical tests were also conducted for the same. The results revealed that the hydrophobic and mechanical properties of the CC-FPUF films were improved. Water contact angle and tensile strength values of the CC-FPUF-8 film were 125.8° and 36.63 MPa, respectively, which were, respectively, 34.1° and 24.47 MPa higher than those of the CC-FPUF-0 film. Thus, the embedding of CC-F into polyurethane molecules could significantly improve the hydrophobic and mechanical properties of the waterborne polyurethane films. Therefore, these novel fluorinated waterborne polyurethanes can be potentially used for hydrophobic coatings in the future.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Chao Chen,Qian Chen,Jing Kang,Jimin Shen,Binyuan Wang,Fang Guo,Zhonglin Chen
In this study, a triazine-based dendron produced by the reaction of cyanuric chloride and diamine was synthesized successfully and applied in the adsorption of copper and lead ions in aqueous systems. The effects of pH, contact time, adsorbent dosage, solution temperature, initial concentration, coexisting substances and desorption were systematically performed in the case of adsorption operations. The adsorption of the both heavy metal ions followed the pseudo-second-order kinetic model best, with the equilibrium adsorption time at 120 min. The adsorption isotherms were well-described by the Langmuir model and the calculated maximum adsorption capacity of Cu 2+ and Pb 2+ was 103.68 and 133.47 mg g − 1 at 25 °C, respectively. Based on the Dubinin-Radushkevich (D-R) isotherm model and calculation of adsorption free energy , the sorption processes for Cu 2+ and Pb 2+ were both chemisorption . Desorption and reuse experiments demonstrated that without significant loss in its original performance that could be reused in five cycles. The high density of terminal hydroxyl groups on the dendron was believed to participate in the chemical sorption process of Cu 2+ and Pb 2+ due to electrostatic attraction and surface complexation in the binding process. These results suggested the triazine-based dendron can be used as an efficient adsorbent for metal ions removal from wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 61
·期 18
·2139-2148
·
IF 3.4
Xueyan Ma,Bingqing Liu,Yongbing Hao,Xing Guo,Lixia Liu,Jia Wang,Shujun Chao,Linlin Shan,Xuefang Shang
A novel free-halogen flame retardant (trimethylolphosphine carbamate, THPON) was synthesized through the simple reaction between tetrakis(hydroxymethyl) phosphonium chloride and urea. Small molecule THPON could infiltrated the cotton fibers and grafted on cotton cellulose by amide bond. What is more, THPON did not change the inherent crystal structure of cotton because it infiltrated into the amorphous region of cotton. THPON-treated cotton was easily decomposed into phosphoric acid or polyphosphate at lower temperature and exhibited good flame retardancy due to the N/P synergistic effect. Compared to control, the heat release rate of THPON-treated cotton increased slower, indicating that a protective carbon layer formed and acted as a barrier. In addition, THPON displayed the low cytotoxicity and biosafety. The development and properties of THPON could provide an important data for the further application in the industry. Graphical
研究领域:
材料科学
·
纺织工程
·
化学工程
✓ 已验证
DOI
高影响因子
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