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
·
高分子化学
✓ 已验证
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
·
纺织工程
·
应用化学
✓ 已验证
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
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
Y. Li,X. Chen,Q. Liu,J. Sun,H. Li,X. Gu,S. Jiang,S. Zhang
Cross-functional additives were carefully designed for polypropylene (PP) composites to enhance the flame retardancy, UV resistance, and mechanical properties . In this work, first, ammonium polyphosphate (APP) was coated with polysiloxane to avoid the pyrolysis of APP under UV irradiation; second, the charring formation agent (CFA) with triazine groups was selected to enhance the absorbance of UV radiation. Hindered amine light stabilizer (TEMP) was reacted with sodium lignin sulfonate (SLS) to obtain SLS-TEMP. By using 19 wt.% (SiAPP/CFA)/2 wt.% SLS-TEMP, the limiting oxygen index of the PP composite was increased to 33.5 and the UL-94 grade was achieved to V-0. The peak heat release rate and peak smoke release rate were reduced by 76% and 74% compared with that of the control PP sample, respectively. Moreover, the aging process of the PP composite sample was delayed. The tensile and impact strength of the PP/19 wt.%(SiAPP/CFA)/2 wt.%SLS-TEMP sample was decreased by 13.4% and 27.8%, respectively after 60 h UV irradiation, which was significantly lower than that of control PP (50.9% and 68%). The change of limiting oxygen index before and after aging was minimal, and the sample still passed UL-94 V-0 grade after 100 h UV-aging test. It was proved that the SLS-TEMP has an excellent synergy effect on improving the flame retardancy and UV resistance of PP. This cross-functional additive strategy provides a good solution for obtaining high-performance PP composites.
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
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Mingyue Wang,Quan Zhou,Lingling Li,Qiuyi Liu,Min Wang,Yue Lan,Yuqiang Xiao,Jiaqi Hu,Zhangyong Song,Famin Ke,Xiurong Guo,Dandan Wang,Die Gao
Glucocorticoids possess extensive and potent pharmacological effects, but their misuse and overuse are widespread concerns. Consequently, the environmental pollution and health hazards associated with their excessive usage cannot be overlooked. There is an urgent need for enhanced removal and a thorough understanding of the environmental and safety risks arising from the overconsumption of these drugs. In this study, a novel F, N-enriched covalent organic framework (designated as TAPT-COF) with high crystallinity was synthesized. TAPT-COF features numerous active sites, including F-F interaction and hydrogen bond interaction sites, along with a high specific surface area and good thermal stability. These characteristics enable TAPT-COF to serve as an advanced adsorbent for dispersed solid-phase extraction (D-SPE) of glucocorticoids such as fluocinonide acetate, budesonide, and dexamethasone, with adsorption capacities ranging from 146.77 to 228.90 mg·g⁻¹ . Notably, TAPT-COF exhibits exceptional protein exclusion efficiency, achieving exclusion rates exceeding 95 %. Due to these advantages, TAPT-COF based D-SPE demonstrates strong applicability in the analysis of complex practical samples, including water and plasma, with satisfactory recoveries ranging from 76.48 % to 112.76 %. Compared to a COF (TPB-COF) that lacks a triazine group, TAPT-COF exhibits superior adsorption performance for target glucocorticoids. This is attributed to its ability to provide enhanced electrostatic interactions, as well as the synergistic effects of hydrogen bonding and F-F interactions. Additionally, TAPT-COF displays a low hemolytic activity, indicating its potential for in vivo analysis.
研究领域:
环境科学
·
药物分析
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Qiaobo Liao,Dongni Wang,Can Ke,Yiying Zhang,Qinwen Han,Yifan Zhang,Kai Xi
Fenton reaction is one of the most efficient and widely used advanced oxidation processes (AOPs) for remediating the ever-growing water pollution. Metal-free photocatalysts for Fenton-like reactions have gathered enormous interest for their advantages including broad pH operation range and high stability. Herein, we report a metal-free covalent organic framework (COF)-based standalone photocatalyst with superior reactivity for Fenton-like reactions, surpassing well-known metal-free photocatalysts and being comparable to the metal-containing catalysts, as well as the remarkable generality. The outstanding performance can be attributed to large porosity, high density of photoactive triazine moiety, the suitable bandgap that originated from the partly interrupted π-conjugation, efficient charge separation and transfer due to the AA stacking, as well as abundant H 2 O 2 binding sites and reaction centers. This work not only provides an efficient metal-free photocatalyst for Fenton-like reactions, but also paves the way for COFs towards industrial applications, aiming for a greener future.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 12
·1-11
·
IF 5.833
Fan Fangbin,Lu Xiaofeng,Wang Shuai,Wang Licheng,Liang Xiaojing,Guo Yong
By introducing functional groups such as quaternary amine groups, sulfonic acid groups, triazine groups, and other mespore nanomaterials into the hydrogel, better separation effect of some organic framework materials has been obtained. Due to a reasonable design and preparation strategy, the hydrogel composite-modified silica can be used in the selective separation of various analytes such as pesticides, alkylbenzenes, polycyclic aromatic hydrocarbons, nucleosides/bases, benzoic acids, antibiotics, and carbohydrates. Through the exploration of chromatographic retention behavior, it is proved that the column can be used in mixed-mode liquid chromatography. The intra-day relative standard deviation for retention time of this new stationary phase is 0.12–0.16% ( n = 10), and the inter-day relative standard deviation is less than 0.39% ( n = 5). This new stationary phase can also be used for separation in complex samples. The limit of detection (LOD) for chlorotoluron in farm irrigation water is 0.21 µg/L and the linear range is 2–250 µg/L. After optimizing the chromatographic conditions, the highest efficiency of the hydrogel column in RPLC and HILIC modes has reached 32,400 plates/m (chlorobenzuron) and 41,300 plates/m (galactose). This new type of hydrogel composite is a porous network material with flexible functional design and simple preparation method and its application has been expanded in liquid chromatography separation successfully. Graphical abstract The hydrogel composed of triallyl cyanate cross-linking agent and 3-(2-(methacryloyloxy) ethyl) dimethylamine) propane-1-sulfonate (SBMA) monomer which were co-modified on the surface of mesoporous silica with MOF-919 for separation in mixed-mode liquid chromatography.
研究领域:
分析化学
·
材料科学
·
纳米技术
·
色谱学
✓ 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）