JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 38
·e52920
·
IF 3.057
Wei Wang,Li Lei,Qiuru Bao,Yuan Liu,Qi Wang
The flame retardant work of polyolefin materials has always been a challenge in the industry. Herein, we report a triazine charring agent (TM) containing hydroxyl and triazine ring. Combined with ammonium polyphosphate (APP), TM was applied to prepare flame retardant thermoplastic polyolefin (TPO) composites. The results of thermogravimetric analysis (TGA) test show that TM has high initial pyrolysis temperature and retention rate of char residue at high temperature. The UL-94, limit oxygen index (LOI) and cone calorimetry tests (CCT) were used to characterize the flame retardancy of TPO composites. The UL-94 V-0 rating and LOI value of 29.2% are achieved with a loading of 9.17 wt% flame retardant (TPO-3). In particular, the fire performance index (FPI) associated with the flashover time also increases to 0.037 m 2 s/kW compared with TPO (0.030 m 2 s/kW). The synergistic effects of APP/TM were investigated in depth. The results show that APP/TM system forms a dense and continuous char layer on the surface of TPO during combustion, which effectively insulates the substrate from heat and oxygen erosion. Additionally, APP/TM system also plays a weak but important flame retardant role in the gas phase, including quenching effect of phosphorous compounds and dilution effect of non-combustible gases.
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
JOURNAL OF MOLECULAR STRUCTURE
·
2018
·
IF 2.011
Yuzhi Xiong,Sining Zheng,Ling Zhu,Hongyu Guo,Fafu Yang
By step-by-step etherification on cyanuric chloride with BODIPY unit and cholesterol units, two novel cholesterol-triazine-BODIPY trimers (compounds 6 and 7 with one and two cholesterol unit, respectively) were designed and synthesized in high yields. The investigation on mesomorphic properties suggested that compound 6 with one cholesterol unit was a nematic liquid crystal but compound 7 with two cholesterol units was a hexagonal columnar liquid crystal. Both compounds 6 and 7 exhibited the strong fluorescence with high quantum yields and larger Stokes shifts than their precursors. The cholesterol-triazine moiety played crucial role for producing liquid crystalline property and enhancing fluorescence.
研究领域:
化学
·
材料科学
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DOI
高影响因子
RUSSIAN JOURNAL OF ORGANIC CHEMISTRY
·
2023
·Vol. 59
·期 9
·1610-1619
·
IF 0.8
Dong Chang-E.,Li Rui,Pan Zai-Xiu,Li He,Qian Jing-Jing,Liu Wei-Wei,Cao Zhi-Ling,Shi Da-Hua
Abstract Fourteen 1,3,5-triazine–1,2,4-triazine hybrids were designed and synthesized. Their structures were confirmed by IR, NMR, and high-resolution mass spectra, as well as by single crystal X-ray diffraction. The cholinesterase inhibitory activities of the hybrids were assayed by Ellman’s method. Five of the fourteen hybrids inhibited acetylcholinesterase by more than 50% at a concentration of 50 μM. Only two hybrids inhibited butyrylcholinesterase by more than 50% at a concentration of 50 μM. Compound 5c possessed the best acetylcholinesterase and butyrylcholinesterase inhibitory activities with IC 50 of 6.80±0.14 μM and 1.91±0.12 μM, respectively. Molecular docking showed that compound 5c interacted with both catalytic active site and peripheral anionic site of acetylcholinesterase.
研究领域:
药理学
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有机化学
·
神经科学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Yanbiao Shi,Xiaobing Wang,Xiufan Liu,Cancan Ling,Wenjuan Shen,Lizhi Zhang
We demonstrate that visible light irradiation can promote Fe 3 S 4 Fenton oxidation of atrazine. The visible light irradiation could increase the atrazine Fenton degradation rate by 4.9 times. The enhanced atrazine degradation activity under visible light was attributed to the higher surficial Fe(II)/Fe(III) ratio of Fe 3 S 4 and the efficient surface iron redox cycle triggered by visible light. Experimental results revealed that the operando formation of FeOOH on the Fe 3 S 4 surface blocked the iron redox cycle and inhibited the H 2 O 2 decomposition, accounting for the largely decreased Fenton activity of Fe 3 S 4 in dark, while these problems were successfully solved by the introduction of visible light irradiation, which excite Fe 3 S 4 to produce abundant photo-generated electrons and O 2 − for efficient regeneration of active Fe(II) species of Fe 3 S 4 and in-situ formed FeOOH.
研究领域:
环境科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 1
·47367
·
IF 2.188
Dong Ma,Juan Li
A triazine derivative CC–Cy was synthesized using cytosine (Cy) and cyanuric chloride (CC). The CC–Cy was used as a charring agent and combined with ammonium polyphosphate (APP) to form an intumescent flame-retardant (IFR) system. The IFR system was applied to improve the flame retardancy of polypropylene (PP). Moreover, bisphenol-A bis(diphenyl phosphate) (BDP) was introduced in the IFR system to regulate the suitability between the IFR and PP. The results showed the PP containing 20 wt % APP and 5 wt % CC–Cy achieves the UL-94 V-2 rating. While the PP with 18 wt % APP/CC-Cy (4:1) and 3 wt % BDP obtains the UL-94 V-0 rating indicating the improved flame-retardant efficiency. Thermal degradation behaviors and char morphology both showed that the reactions between APP and CC–Cy promote the formation of char residues, and BDP works in gas phase to enhance the flame retardancy of PP composites. Thus, a synergistic IFR system based on APP, CC–Cy, and BDP is formed, which can protect PP from fire effectively. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 47367.
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
Nanomaterials
·
2022
·Vol. 12
·期 13
·2213
·
IF 5.719
Yafei Hou,Xiaodan Pei,Yuancheng Wang,Luyuan Zhang,Xiaohui Wei,Hongyan Mao,Wuduo Zhao,Shusheng Zhang,Wenfen Zhang
The aromatic structure and the rich nitrogen content of polymers based on covalent triazine-based frameworks (CTF) and their unique hydrophilic-lipophilic-balanced adsorption properties make them promising candidates for an adsorbent that can be used for sample pretreatment. Herein, a new covalent triazine-based framework (CTF-DBF) synthesized by a Friedel–Crafts reaction was used for the determination of the content of nucleotides in commercial infant formula. It was shown that the synthetic materials had an amorphous microporous structure, a BET surface area of up to 595.59 m2/g, and 0.39 nm and 0.54 nm micropores. The versatile adsorption properties of this material were evaluated by quantum chemistry theory calculations and batch adsorption experiments using five nucleotides as probes. The quantum chemistry results demonstrated that CTF-DBF can participate in multiple interactions with nucleotides. All the analyses performed present good linearity with R2> 0.9993. The detection limits of targets ranged from 0.3 to 0.5 mg/kg, the spiked recoveries were between 85.8 and 105.3% and the relative standard deviations (RSD, n = 6) were between 1.1 and 4.5%. All these results suggest that this versatile CTF-DBF has great potential for sample pretreatment.Keywords:covalent triazine-based frameworks;solid-phase extraction;nucleotides
研究领域:
分析化学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2018
·Vol. 29
·期 11
·2774-2783
·
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
✓ 已验证
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
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2019
·
IF 4.153
Wen jie Kuang,Shao chang Ji,Shen min Xu,Ping Lan,An ping Liao,Ju ying Zhou,Jin yan Zhang
Two novel lamotrigine cocrystals, namely, lamotrigine (LAM) phthalimide (PTL) cocrystal (1) and lamotrigine (LAM) succinimide (SUC) cocrystal monohydrate (1:1:1) (2), were successfully synthesized by liquid-assisted grinding and evaporative crystallization, and their structures were determined by XRD (power and single-crystal X-ray diffraction) and FT-IR. Ternary phase diagrams of LAM–PTL were constructed for the obtained cocrystal in isobutanol and ethyl propionate at two different temperatures, i.e., 298.15and 303.15 K. A narrow stability region was found for the pure LAM–PTL cocrystal in the phase diagram at both temperatures. The solubility of LAM–PTL was measured by suspending cocrystal in solutions of varying PTL concentrations in ethyl propionate and isobutanol. The mathematical model described by the solubility product of cocrystal components Ksp and by solution complexation constants K11 was used to fit the solubility of LAM–PTL cocrystal. It can be concluded that Ksp values increase as the cocrystal solubility increases, while K11 values decrease. Graphical representation of the cocrystal solubility dependence on ligand concentration will serve as a diagnostic tool for the stoichiometry of solution complexes. The results of the stability study demonstrated that 1 and 2 are stable under the conditions of both 85% and 98% RH at 25 °C.
研究领域:
药学
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材料科学
·
化学
✓ 已验证
产品关联
DOI
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
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
·
2017
·
IF 3.756
Shichao Du,Yan Wang,Songgu Wu,Bo Yu,Peng Shi,Lin Bian,Dejiang Zhang,Jie Hou,Jingkang Wang,Junbo Gong
Crystal engineering strategy was applied to develop new solid forms of lamotrigine . Two novel cocrystals of lamotrigine forming with 4,4′-bipyridine (2:1) and 2,2′-bipyridine cocrystal (1:1.5) were successfully obtained by neat grinding and liquid assisted grinding. The novel cocrystals were fully characterized and confirmed by X-ray diffraction, thermal and spectroscopic analysis. DXRxi Raman microscope was also used to identify the cocrystals. The factors such as solvent and the structure of coformers which influenced the cocrystal formation were discussed. Furthermore, the novel cocrystals were both obtained by slurry crystallization . Process analytical technologies including focused beam reflectance measurement and attenuated total reflectance Fourier Transform Infrared were applied to investigate the cocrystallization process and the mechanism. HPLC analysis showed that the dissolution rate and the solubility of the two novel cocrystals were both improved.
研究领域:
药学
·
晶体工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2016
·
IF 3.586
Ping Yuan,Suchun Ji,Jianghuai Hu,Xueping Hu,Ke Zeng,Gang Yang
Blends of phthalonitrile ( CN ) and alicyclic imide compounds synthesized from tetrahydrophthalic anhydride ( CC ), methyl tetrahydrophthalic anhydride ( MCC ) and hexahydrophthalic anhydride ( HCC ), respectively, were prepared and characterized. Results from rheological studies demonstrated the scope of a novel Thermal Synergistic Polymerization (TSP) effect between phthalonitrile and the alicyclic imide compounds. FTIR data showed a unique phenomenon, which is, the C N of the phthalonitrile compound could be completely and rapidly consumed without generating any triazine ring. Further works on cured products of CC / CN system showed comparable or even higher thermal oxidation stability, low boiling water absorbance and moderate dielectric constant ( ε′ in the range of 4.8∼4.5) with almost no voids compared with that of the phthalonitrile resins promoted by traditional curing system of active hydrogen. Model system was designed to study the mechanism of TSP effect of alicyclic imide moiety/phthalonitrile. The systematic characterizations by FTIR, UV–Vis, MALDI-TOF MS, free radical scavenger (DPPH), EPR , etc. showed that the TSP reaction undergoes both copolymerization and homopolymerization with no triazine formation, involving a free radical process. Structural analysis of the oligomers suggested that phthalocyanine rings were a minor component of the thermoset networks, while polyisoindolines were the primary structural motif.
研究领域:
材料科学
·
高分子化学
✓ 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）