JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Zhisheng Zhang,Fang Zhu,Tingting Yang,Yongkun Wu,Yue Shi,Hongxiang Ou
An environmentally friendly intumescent flame retardant was developed by blending tannic acid (TA) and ammonium polyphosphate (APP), and intumescent flame-retardant polyurethane composites (IFR/TPU) were prepared via melt blending. The flame retardancy and mechanism of IFR/TPU were investigated through limiting oxygen index (LOI), cone calorimeter, and mechanical property tests. Results indicate that at a total exothermic flame retardant loading of 25 wt% and a TA:APP mass ratio of 1:1, IFR/TPU exhibits an LOI of 30.8%, achieving UL-94 V-0 rating, with a TG residue of 24.4%. The peak heat release rate (pHRR) decreased from 1102.46 kW/m 2 for pure thermoplastic polyurethane to 313.17 kW/m 2 . Furthermore, the incorporation of TA mitigated the adverse effects of flame retardants on the mechanical properties of TPU. SEM analysis of char residues revealed that TA promotes the formation of expanded carbon layers. This results in denser, more uniform char layers during combustion, enhancing both flame retardancy and smoke suppression. TA exhibits synergistic flame retardancy with APP. This approach maintains the inherent properties of polyurethane while delivering excellent flame retardancy, offering a novel design strategy for developing next-generation bio-based flame retardants.
研究领域:
材料科学
·
高分子化学
·
消防安全工程
·
可持续材料
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2020
·Vol. 40
·期 7
·1940-1948
·
IF 2.161
Li Jia-Xin,Chen Yu-Hong,Bai Zhang-Jun,Zhao Bao-Jun,Jiang Liang,Wu Lan-Er
Ta–W alloys have unique properties but their applications at high temperatures are restricted due to their poor oxidation resistances. The addition of Al and Ti decreases the oxidation rate of the alloy, as Al-contained protective oxide layer could be formed. In this study, ternary and quaternary Ta–W alloys containing Al and Ti were prepared by hot press sintering. The microstructures and oxidation behaviors of the alloys were studied at 1173 K. The results show that the oxidation kinetics of all alloys follows a parabolic law at short oxidation periods. After cyclic oxidation, the kinetics of quaternary alloys still obeys the parabolic law but that of ternary alloy has been changed into linear law kinetics after 8-h oxidation. For ternary alloy, an outer layer with dense and continuous alumina was formed during the initial stage, and phase transformation caused the oxides to peel off. By comparison, the quaternary alloys depicted continuously solid solution of the oxides layer. Overall, Al and Ti played key roles in oxidation degree and affected the oxidation kinetics of ternary and quaternary alloys.
研究领域:
材料科学
·
金属学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Manting Wang,Rongrong Fan,Qingjian Yu,Jie-Xin Wang,Yuan Le,Jian-Feng Chen
Controlled pesticide delivery systems offer many distinctive advantages over conventional pesticide formulations. In this work, degradable poly(N-isopropylacrylamide) (PNIPAM)–tannic acid (TA) microgels and multifunctional PDA@PNIPAM-TA nanocomposites were prepared in a high-gravity rotating packed bed reactor (RPB) for smart pesticide delivery and release. The as-prepared microgels and nanocomposites showed reversible temperature-dependent swelling/deswelling behavior and irreversible pH-induced degradation. A dynamic contact angle test suggested that the introduction of TA and PDA into the PNIPAM matrix could enhance foliar adhesion and deposition efficiency. The nanocomposites were further used for the encapsulation and delivery of imidacloprid (IMI) to protect it from rapid photolysis and improve its pest-control efficiency. Their thermoresponsive behavior as well as pesticide loading capacity could be tuned by tailoring the PNIPAM-TA shell thickness, which could be varied by the NIPAM amount. The release rate of IMI from the core/shell nanocomposites was positively correlated with environmental temperature and near-infrared (NIR) light, which was adaptive to the positive temperature-dependent toxicity correlation of IMI and the increasing trend of pests under high temperature. The cumulative release of IMI was 23.5% at 25 °C, while it was 81.2% at 40 °C after 24 h of incubation, and the release rate was greatly enhanced under NIR irradiation. The results indicated that the facile control of pesticide release could be realized by regulating environmental conditions. This work also provides an idea for using high-gravity technology to conveniently construct a smart, effective, and environmentally friendly pesticide delivery system for sustainable crop protection.
研究领域:
材料科学
·
化学工程
·
农业科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Rui Luo,Yuting Huang,Min Wang,Tong Yu,Kexin Tai,Lin Hu,Xiankun Wu
Advanced oxidation processes based on persulfate (PS-AOPs) have emerged as effective strategies for environmental remediation, with cobalt-based oxides serving as prominent catalysts for peroxymonosulfate (PMS) activation. In this study, we developed a highly active Co 3 O 4 /Al 2 O 3 catalyst (Co/AA) featuring ultrafine nanoparticles, synthesized via a facile approach using tannic acid (TA) as a coordinating agent and activated alumina as a robust support. Co/AA-0.1, as the representative catalyst, was characterized and exhibited outstanding performance in degrading rhodamine B (RB) via PMS activation. Our findings highlight TA's critical role in reducing Co 3 O 4 nanoparticle size, thereby increasing the availability of active sites. The degradation mechanism was elucidated through reactive oxygen species (ROS) quenching experiments and electron paramagnetic resonance (EPR) analysis, revealing that sulfate radicals (SO 4 •− ) are the dominant ROS. The high activity of Co/AA-0.1 is confirmed by analyzing X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller surface area and O 2 -temperature programmed desorption data of the samples. We also investigate the effects of various factors, such as anions, reaction temperatures, and PMS dosage, on RB degradation. Higher temperatures for treating the catalyst are found to reduce activity but improve stability. Notably, the catalyst synthesized through EDTA-assisted synthesis showed balanced activity and stability. Furthermore, the versatility of our synthesis method was demonstrated by successfully applying it to other supports, such as SiO 2 and TiO 2 , offering the development of more efficient and stable catalysts for environmental applications.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Lingrui Zhang,Li Zhao,Yating Tan,Xiaobo Gong,Meng Zhu,Yong Liu,Yucheng Liu
Oil/water separation has become a global concern due to the increasing discharge of multi-component harmful oily wastewater. Super wetting membranes have been shown to be an effective material for oil/water separation. Ultra-high flux stainless-steel meshes (SSM) with superhydrophilicity and underwater superoleophobicity were fabricated by tannic acid (TA) modified ZIF-8 nanoparticles (TZIF-8) and two-dimensional MXene materials for oil/water separation. The TZIF-8 increased the interlayer space of MXene, enhancing the flux permeation (69,093 L m −2 h −1 ) and rejection of the composite membrane (TZIF-8@MXene/SSM). The TZIF-8@MXene/SSM membrane showed an underwater oil contact angle of 154.2°. The membrane maintained underwater superoleophobic after stability and durability tests, including various pH solutions, organic solvents, reusability, etc. In addition, the oil/water separation efficiency of TZIF-8@MXene/SSM membranes was higher than 99% after treatment in harsh conditions and recycling. The outstanding anti-fouling, stability, durability, and recyclability properties of TZIF-8@MXene/SSM membrane highlight the remarkable potential of membranes for complex oil/water separation process.
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
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Mengbin Gu,Ge Yuxi,Gang Yu,Jun Huang
Ultraviolet-activated persulfate (UV/PS) represents a promising advanced oxidation process (AOP) for the elimination of toxic and bio-refractory organic pollutants in wastewater due to the advantages of SO 4 • - . C7 HFPO-TA, one of the latest alternatives to PFOA in fluoropolymers production, with a unique structural fragment (CF 3 O-CF(CF 3 )-) that has been frequently identified in effluents, surface waters, and sediments in proximity to fluorochemical industrial zone. In this study, we evaluated the degradation of C7 HFPO-TA and co-existing PFHxA in AOPs, mainly focusing on the molecular structure effect on the chemical affinity with different reactive species (RSs). The results showed that >99.9% C7 HFPO-TA and PFHxA could be decomposed after 480 min in UV/PS, significantly outperforming UV/H 2 O 2 (<10%), as the result of the synergistic effect of radical/non-radical (SO 4 • - /HSO 4 •, O 2 • - , HO•, 1 O 2 ) and chain reactions. The degradation mechanism of C7 HFPO-TA was primarily governed by the DHEH mechanism, which facilitated radical chain reactions and resulted in the formation of a new perfluoroalkyl ester intermediate (C 6 F 12 O 3 ), as optimized by Transition State theory. The degradation of five HFPO and three PFCA was highly dependent on their molecular structures. Degradation kinetics and DFT calculations demonstrated the longer branched fluorocarbon chain could diminish the steric hindrance of α-CF 3 in HFPO and made the electron distribution more flexible for the reaction with the RSs. The comprehensive analysis of degradation kinetics, theoretical calculations and intermediates analysis elucidated the transformation mechanisms of C7 HFPO-TA and PFHxA in UV/PS.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Hongxin Luo,Xin Li,Nanqi Shi,Feng Guo,Han Yin,Zhike Li,Haiyan Li
In this work, self-reporting corrosion inhibition coatings with long-term corrosion protection was prepared by different process means. The two-dimensional (2D) materials ZrP-NH 2 and Tannin@SiO 2 (TA@SiO 2 ) microcapsules were introduced into the epoxy resin (EP) coatings, and the Layered EP coatings (TA@SiO 2 layer coatings and ZrP-NH 2 layer coatings) and the Mixed EP coatings were prepared by layered spraying and mix spraying, respectively. In the pre-corrosion stage, the excellent barrier performance of the ZrP-NH 2 layer coating hinders the diffusion of corrosive media. In the later stages of corrosion, the TA@SiO 2 microcapsules in the TA@SiO 2 layer coating releases TA, which forms a TA-Fe 3+ passivation film with the metal substrate and confers the coating with a blue-violet self-reporting function. Furthermore, the synergistic corrosion inhibition mechanism of TA@SiO 2 layer coatings was investigated by DFT theoretical calculations and experiment. Meanwhile, the Layered EP coatings provide the triple functions of excellent physical barrier action, corrosion inhibition and self-reporting under high temperature and high salt conditions.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2024
·
IF 4.8
Wenya Li,Yongsheng Liu,Jingxin Li,Yejie Cao
(Ti 0.2 Zr 0.2 Hf 0.2 Nb 0.2 Ta 0.2 )B 2 -SiC ceramics with an open porosity of only 0.49 % were successfully fabricated in this work by the reactive melt infiltration (RMI) method. Air plasma flame ablation behavior of (Ti 0.2 Zr 0.2 Hf 0.2 Nb 0.2 Ta 0.2 )B 2 -SiC ceramics under 2300 °C temperature exhibited excellent resistance with mass and linear ablation rates of 3.66 mg/s and 0.88 μm/s, respectively. During ablation, the transition from continuous melting sublimation of Si and oxidation of SiC to oxidation of (Ti 0.2 Zr 0.2 Hf 0.2 Nb 0.2 Ta 0.2 )B 2 occurred. The uphill diffusion of Ti atoms transited (Ti,Zr,Hf,Nb,Ta)O x to Ti(Nb x Ta 1-x ) 2 O 7 while Zr 0.5 Hf 0.5 O 2 continuously precipitated. A multicomponent oxide layer of (Ti,Zr,Hf,Nb,Ta)O x along with (Zr,Hf) 6 Ta 2 O 17 , (Hf,Zr)(TiO 4 ) 2 , and (Zr,Hf) x (Ti,Ta) 1-x O embedded in SiO 2 melt was eventually formed on the ceramic surface. This oxide layer was spread above the high melting point Zr 0.5 Hf 0.5 O 2 , Ti(Nb x Ta 1-x ) 2 O, and low oxygen content (Ti,Zr,Hf,Nb,Ta)O x to form a stable, dense, and high viscosity protective layer.
研究领域:
材料科学
·
航空航天材料
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Zhenmin Wu,Jie He,Guoyu Zhao,Xiaoyan Tang,Junqing Li,Wenhang Chen,Ruiqi Li
The current membrane materials used for oil–water separation suffer from low separation efficiency and poor durability, and membrane contamination is also a key issue that must be addressed urgently. In this paper, a superhydrophilic PANI/Ag/TA@PVDF composite membrane with PANI-Ag NPs heterojunction structure was prepared via chelation and reduction of Ag+ by tannic acid (TA) and in situ growth of hydrochloric acid-doped polyaniline (PANI). TA endows the prepared composite membrane with excellent superhydrophilicity and underwater oleophobicity, remarkable oil–water separation capacity (the separation efficiency of more than 97% for soybean oil), and extraordinary antifouling properties. Notably, the range of photodegradation is expanded from UV to visible light by the construction of a Schottky heterostructure between PANI and Ag NPs, the photocatalytic degradation ability of composite membrane for organic pollutants has been improved obviously, and the degradation efficiency for crystal violet (CV) is 97.9%. Considering these merits, the PANI/Ag/TA@PVDF composite membrane provides an effective strategy to overcome the shortcomings of existing membrane materials, presenting enormous potential in the treatment and purification of oily wastewater.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 30
·2315813
·
IF 18.5
Ying Liu,Guoxing Tian,Yingjie Du,Pengju Shi,Na Li,Yunfeng Li,Zhihui Qin,Tifeng Jiao,Ximin He
As wearable sensors advance rapidly, demands for multifunctional conductive soft materials are ever higher, including high stretchability, resilience, adhesiveness and stability, simultaneously in one material, for stable long-term use. Nanocomposite hydrogels incorporating conductive two-dimensional (2D) nanofillers, such as MXene-composited gels, emerge as promising candidates. Yet, fulfilling all above requirements, particularly large stretchability with low hysteresis, remains a challenge, owing to the easy oxidation and weak interactions of MXene nanosheets with polymer chains. Herein, an interfacial engineering strategy is proposed, where tannic acid (TA) with high-density hydroxyl groups is introduced to encapsulate MXene into a stable TA@MXene nano-motif and meanwhile increase the hydrogen-bonding interactions between TA@MXene and polymer network. By incorporating TA@MXene into poly(hydroxyethyl acrylate) (PHEA) network in a glycerol/water binary solvent, the obtained organohydrogel exhibits integrated properties of high stretchability (>500%) with low hysteresis (<3%), superior fatigue resistance (consistent hysteresis over 500 cycles at 300% strain), good adhesiveness, along with long-term stability (>7 days) and antifreezing abilities (−40 °C). Such organohydrogels demonstrate superior strain-sensitivity and thermosensitive capacities, enabling accurate and reliable detection of human movements, electrocardiogram signals, and body temperature. This general approach of stabilizing nanomaterials while effectively enhancing nanomaterial-polymer bonding is applicable for synthesizing diverse high-performance nanocomposited gels.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
FERROELECTRICS
·
2014
·
IF 0.433
Lian Xiang,Gang Chen,Chunlin Fu,Wei Cai,Wei Wang,Kaihua Liu
Sr2(TaxNb1-x)2O7 (x = 0.0, 0.1, 0.2, 0.4) (STNO) ceramics were prepared by the conventional solid-state reaction method. The microstructure, dielectric and ferroelectric properties of the samples were investigated. The results show single phase STNO with perovskite-like layered structure and that Ta5+ ion can diffuses into the crystal lattice. The addition of Ta5+ dopant decreases the grain size of the material. The dielectric constant increases with increased x, and the sample with x = 0.2 exhibits enhanced dielectric properties (ϵr ≈ 56, tanδ ≈ 0.01%). The remnant polarization (2Pr) and coercive electric field (2EC) of STNO ceramics increase with increasing Ta content, and reach the maximum value (2Pr = 0.11μC/cm2 and 2EC = 5.75 kV/cm) at x = 0.4. Our results indicate that Ta doping can effectively improve the dielectric and ferroelectric properties of Sr2Nb2O7 ceramics.
研究领域:
材料科学
·
电子材料
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xinjian Hu,Fei Chai,Guanghui Li,Lili Yan,Pinhua Rao,Wenqi Zhang,Jihyeon Kim,Sangsook Park,Runkai Wang
The treatment of oil-containing wastewater poses significant environmental challenges due to its complex composition and high emulsification. Membrane technology offers an energy-efficient alternative for oil–water separation. This study explores the surface physicochemical properties, self-cleaning capabilities, and high-temperature oil–water separation applications of silicon carbide (SiC) ceramic membranes modified with a tannic acid/polyethyleneimine (TA/PEI) complexes. The TA/PEI@SiC membrane, prepared via a complex solution, exhibits increased water contact angle but still maintains hydrophilicity and underwater superoleophobicity. The TA/PEI@SiC membrane demonstrated exceptional high-temperature stability, maintaining separation efficiency above 97.73 % across a range of temperatures (60–90 °C). In cyclic tests, the membrane maintained emulsion separation efficiencies of 99.53–99.95 % at 60 °C, 98.59–99.53 % at 70 °C, 98.75–99.68 % at 80 °C, and 97.53–99.39 % at 90 °C. Research has shown that oil droplets can spontaneously detach from the membrane surface underwater, demonstrating effective self-cleaning properties.
研究领域:
环境科学
·
材料科学
✓ 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）