查找使用阿拉丁产品的科研文献

Application of TMP-DCMC-BBR/KH-791-SiO2/HPDSP multifunctional protective fluid in paper protection

Huijuan Shi,Zhenzhen Chen,Yingping Qi,Hua Li

A novel paper multifunctional protective solution was prepared by mixing berberine modified trimethoprimed carboxymethyl cellulose (TMP-DCMC-BBR), KH-791 modified nano-SiO 2 (KH791-SiO 2 ) and hydroxypropyl starch phosphate (HPDSP), and the mechanical properties, optical properties, antibacterial properties, aging resistance, acid and alkali resistance of the paper coated with the protective solution were investigated. It is shown that the paper coated with the multifunctional protective liquid showed good mechanical properties, and has little influence on optical properties of the paper. At the same time, it had good antibacterial properties, aging resistance and acid and alkali corrosion resistance, and there is no obvious change in paper appearance, no decolorization and ink diffusion, which is in line with the principle of “repairing the old as the old and keeping the original appearance”. Moreover, the compound solution has certain reversibility and can absorb a certain degree of ultraviolet rays, so as to weaken the damage of ultraviolet rays to the paper. It is an ideal multifunctional protective liquid for paper and has broad application prospects in paper protection.

LiNO3 and TMP enabled high voltage room-temperature solid-state lithium metal battery

Xiaoyan Zhang,Mengmin Jia,Qipeng Zhang,Nana Zhang,Xiangkun Wu,Suitao Qi,Lan Zhang

The poor interfacial contact and notorious instability issues between solid electrolyte and electrodes seriously handicap the practical applications of solid-state lithium metal batteries (LMBs). In-situ polymerization is a considerable choice to upgrade the interfacial transport properties by directly curing the liquid precursor inside the cell. Herein, a ∼ 17 μm poly(ethylene glycol) methyl ether methacrylate (PEGMEA) based solid polymer electrolyte (SPE) is prepared by this method. Trimethyl phosphate (TMP) and LiNO 3 are introduced to promote the ion transport as well as enhance the electrodes/electrolyte interfacial stability. Interestingly, although LiNO 3 increases the electrolyte’s glass transition temperature thus hinders the anion transport, while higher Li + conductivity is obtained due to the weakened interaction between Li + and its ligands, ethylene oxide (EO) and TMP. The optimal electrolyte (PTLiN1) shows an acceptable ionic conductivity of 1.2 × 10 -4 S cm −1 at 55°C and lithium ion transference number ( t L i + ) of 0.46, which enables the Li||Li symmetric cells to run stability within 1500 h (0.2 mA cm −2 , 0.4 mAh cm −2 ) at 55°C and 1000 h (0.1 mA cm −2 , 0.2 mAh cm −2 ) at 25°C. Meanwhile, the LiFePO 4 ||Li cell with PTLiN1 shows superior long cycle lifetime with a high capacity retention of 88.4% over 300 cycles at 0.5 C. The cells coupled with LiCoO 2 can even work stably under room temperature in the voltage range of 3.0 ∼ 4.3 V. Pouch cells based on PTLiN1 are also prepared and show outstanding flexibility and high security, which provides new idea for the development of economical and convenient solid-state batteries.

Dual-Graphite Batteries with Flame-Retardant Electrolyte Solutions

Lei Zhang,Hongyu Wang

Graphical Double time : It is demonstrated that the concentrated solution of 3 M LiPF 6 -ethyl methyl carbonate/trimethyl phosphate (7 : 3 by vol.) is also compatible with graphite negative and works well for full dual-graphite batteries. Although trimethyl phosphate (TMP)-based electrolyte solutions are effective to resist flames in non-aqueous electrical energy storage devices, they are usually not so compatible with Li-graphite negative electrodes. Herein, we solve this problem by increasing the concentration of LiPF 6 salt in the solution. A benchmark graphite negative electrode (MCMB, mesocarbon microbeads) can deliver a capacity over 325 mAh g −1 and maintain good cyclability in a solution of 3 M LiPF 6 -ethyl methyl carbonate (EMC)/TMP (7 : 3 by vol.). Moreover, our previous work has confirmed that the graphite positive electrode also works very well in the above solution. Therefore, this solution can cater to both anion-graphite and Li-graphite intercalation electrodes, which enables the construction of dual-graphite batteries (DGBs). There are some problems arising during the DGB operation, and corresponding strategies are proposed.

Modulation of the Structure of the Conjugated Polymer TMP and the Effect of Its Structure on the Catalytic Performance of TMP–TiO2 under Visible Light: Catalyst Preparation, Performance and Mechanism

Jing Zhang,Chen Wang,Xiaoguo Shi,Qing Feng,Tingting Shen,Siyuan Wang

The photocatalytic activity of titanium dioxide (TiO2) is largely hindered by its low photoresponse and quantum efficiency. TiO2modified by conjugated polymers (CPs) is considered a promising approach to enhance the visible light responsiveness of TiO2. In this work, in order to investigate the effect of CP structural changes on the photocatalytic performance of TiO2under visible light, trimesoyl chloride–melamine polymers (TMPs) with different structural characteristics were created by varying the parameters of the polymerisation process of tricarbonyl chloride (TMC) and melamine (M). The TMPs were subsequently composited with TiO2to form complex materials (TMP–TiO2) using an in situ hydrothermal technique. The photocatalytic activity of TMP–TiO2was evaluated by the degradation of rhodamine B (RhB). The results showed that the trend of the structure of the TMP with the reaction conditions was consistent with the visible light responsiveness of TMP–TiO2, and TMP (1:1)–TiO2had the best photocatalytic activity and could degrade 96.1% of the RhB. In conclusion, our study provided new insights into the influence of the structural changes of TMPs on the photocatalytic activity of TMP–TiO2under visible light, and it improves our understanding of how conjugated polymers affect the photocatalytic activity of TiO2under visible light.Keywords:conjugated polymer;structural regulation;TiO2;visible photocatalyst

A novel sandwich structure ACF/CC@FeOCl as bifunctional cathode for efficient mineralization of trimethoprim in the heterogeneous electro-Fenton process over a wide pH range

Yongjun Song,Aimin Wang,Songyu Ren,Yanyu Zhang,Zhenjun Wen,Zhongguo Zhang

BACKGROUND It would be highly advantageous to develop a heterogeneous electro-Fenton (HEF) system in which the catalyst is fixed to recycle easily and the electrode itself can produce and activate H 2 O 2 simultaneously. In this study, a new sandwich-like bifunctional cathode using carbon cloth (CC) loaded with FeOCl nanoparticles and activated carbon fiber (ACF) was fabricated and used in the HEF process for the degradation of antibiotic trimethoprim (TMP). RESULTS Experimental results showed that the activated carbon fiber and FeOCl-modified carbon cloth cathode (ACF/CC@FeOCl) exhibited a promising catalytic performance to reduce O 2 to generate H 2 O 2 on the surface of ACF and activate H 2 O 2 to generate hydroxyl radicals ( • OH) at the active sites of FeOCl nanoparticles, thus enabling a rapid TMP degradation in a wide pH range (3–9). Various influencing factors, such as applied cathodic current, pH and TMP concentration, were investigated, and the optimal condition was found at 0.36 A, pH 3.0, and 100 mg L −1 TMP, where 99.7% TMP was degraded within 90 min and 74.4% total organic carbon (TOC) was removed within 360 min. Under the condition of 0.36 A and initial pH 6.8, 100 mg L −1 TMP was completely degraded within 120 min and the mineralization efficiency could achieve 61.5% within 360 min. The coumarin fluorescence probing technique and radical quenching experiments revealed that • OH was the predominant reactive oxygen species (ROS) in the ACF/CC@FeOCl-HEF process. CONCLUSION The reusability and stability tests showed that the ACF/CC@FeOCl cathode has excellent performance and good stability, and this is very promising for the efficient degradation of refractory organic pollutants in the HEF process. © 2022 Society of Chemical Industry (SCI).

Ester Bond-Anchored TMP Moieties for Durable and Rechargeable Anti-biofouling PVDF Membranes

Yang Hao,Shi Feifan,Li Yihang,Shen Rujing,Wei Wei,Wei Ang

Global water scarcity and pollution have elevated membrane separation to an indispensable technology for sustainable water purification. Poly(vinylidene fluoride) (PVDF), prized for its exceptional chemical and mechanical stability, faces a long-standing performance trade-off, as its inherent hydrophobicity causes severe biofouling, while chlorine regeneration for biofilm removal degrades surface-grafted antibacterial functional layers. Herein, we report a high-performance chlorine-rechargeable N-halamine antibacterial membrane (denoted as PPVDF-O-TP-Cl, a PEG-blended PVDF grafted with chlorinated TMP moieties) fabricated via an integrated “passive defense-active attack” strategy, featuring covalent surface anchoring of sterically hindered 2,2,6,6-tetramethylpiperidine (TMP-OH) onto PVDF backbones through ester linkages. The membrane achieved robust broad-spectrum antibacterial efficacy, delivering a 6.1-log reduction against Gram-negative E. coli and a 5.5-log reduction against Gram-positive S. aureus within 30 min, a flux recovery ratio exceeding 90.0%, and retained over 99% antibacterial activity after 10 chlorination-regeneration cycles. Notably, TMP’s bulky methyl groups sterically shield vulnerable ester bonds from hydrolytic and oxidative degradation, while PEG hydration layers and N-halamine moieties synergistically mitigate the interfacial kinetic imbalance plaguing traditional membranes. This work provides a versatile strategy for designing durable rechargeable anti-biofouling membranes, with future investigations warranted into their long-term performance in complex real wastewater matrices and scalable fabrication.

Construction and functional verification of size-reduced plasmids based on TMP resistance gene dfrB10

Chun-cao Li,Rui Hu,Xiu-min Hua,Yi-xuan Ni,Lu Ge,Lu Zhang,Wen Yu,Ni-xin Hao,Hui Xia,Qiang Fang,Zhi-yong Tao

FeNi alloy electrode assisted PMS activation strategy for degradation of trimethoprim: Charge separation mechanism and theoretical calculation

Yuanchuan Ren,Yan Hu,Nanqi Ren,Fenghui Wu,Dandan Chen,Xuejun Zhu,Qiang Niu

FeNi binary metal alloy anchored foam carbon composite electrode was successfully constructed by electrodeposition self-assembly strategy (FeNi@CF). FeNi with heterogeneous structure serves as a charge transfer bridge, promoting charge separation. The degradation efficiency of TMP within 20 min was 98.15 % (k = 0.1935 min −1 ). The contribution of active components to TMP degradation follows the order of SO 4 − · (63.22 %)>·OH (39.55 %)>·O 2 – (9.33 %)> 1 O 2 (5.27 %), which is consistent with the proposed charge separation mechanism. DFT calculations show that the introduction of FeNi alloy can disrupt the sp2 hybrid structure of carbon in graphite electrodes, resulting in the formation of nucleophilic and electrophilic atomic centers on their surfaces, reducing the steric hindrance of PMS adsorption (E ads  = −3.28 eV), enhancing the adsorption strength of PMS, increasing the area of active centers, and improving the activation efficiency of PMS. The free radical quenching and intermediate identification experiments further confirmed the mechanism and pathway of TMP degradation. In addition, FeNi@CF has good repeatability and stability, making it suitable for treating pollutants in various water matrices. This work is expected to provide ideas for risk assessment of various toxic and persistent organic pollutants in drinking water and wastewater.

Preparation and performance study of GLC/TMP double crosslinking modified waterborne polyurethane for wood coatings

Lu Tianhao,Zhou Yuanyuan,Liu Yan,Xin Binjie,Qin Ying,Kuang Guankun

A glucose-modified double crosslinked waterborne polyurethane (WPCU) was synthesized by glucose (GLC) and trimethylolpropane (TMP) as crosslinking agents, polycarbonate diol (PCDL) as the functional soft segment material, and isophorone diisocyanate (IPDI) as the hard segment. The effects of GLC and TMP on the structure and material characteristics of WPCU were examined and evaluated using Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and other tests. The experimental results demonstrate the favorable comprehensive performance of the modified WPCU. The double-crosslinked polyurethanes exhibited excellent mechanical strength (30.9 MPa for WPCU-0.9 film), a higher water contact angle (82.9° for WPCU-0.3 film), and superior thermal stability compared to single-crosslinked polyurethanes modified solely with GLC. In addition, a new type of double crosslinked waterborne wood paint was formulated by adding various additives. It was subjected to painting experiments on wood panels. The newly developed wood coatings using double crosslinked WPCU emulsions exhibit good chemical resistance (to alcohols, acids, and bases), dry heat resistance, and adhesion (adhesion class I). Paint films achieve a hardness of 2H when the GLC content exceeds or equals 1.2%, exhibiting excellent adhesion resistance, which could contribute to the development of high-stiffness waterborne polyurethanes in the future.

Preparation and Photocatalytic Performance Study of TiO2-TMP Composites Under Effect of Crystal Structure Modulation

Jiayi Zhang,Chen Wang,Xiaoguo Shi,Qing Feng,Tingting Shen

Nano-titanium dioxide (TiO 2 ) is currently the most widely studied photocatalyst. However, its rapid recombination of photogenerated carriers and narrow range of light absorption have limited its development. Crystal form regulation and polymer modification are important means for improving the photocatalytic activity of single-phase materials. In this paper, TiO 2 materials of different crystal forms were prepared by changing the synthesis conditions, and they were compounded with trimesoyl chloride–melamine polymers (TMPs) by the hydrothermal synthesis method. Then, their photocatalytic performance was evaluated by degrading methylene blue (MB) under visible light. The mechanisms of influence of TiO 2 crystal form on the photocatalytic activity of TiO 2 -TMP were explored by combining characterization and theoretical calculation. The results showed that the TiO 2 crystal form, through interface interaction, the built-in electric field intensity of the heterojunction, and active sites, affected the interface charge separation and transfer, thereby influencing the photocatalytic activity of TiO 2 -TMP. In the 4T-TMP photocatalytic system, the degradation rate of MB was the highest. These studies provide theoretical support for understanding the structure–property relationship of the interfacial electronic coupling between TiO 2 crystal forms and TMP, as well as for developing more efficient catalysts for pollutant degradation.

Adamantane-Based Cation and [MFn]− Anion Synergistically Enhanced Catalytic Performance of Sulfuric Acid for Isobutane Alkylation

Liuyang Wang,Guoying Zhao,Xiaoqian Yao,Baozeng Ren,Suojiang Zhang

A series of adamantane-based ionic liquids (ADM-ILs) with [MFn]− anions were synthesized as cocatalysts for the alkylation of isobutane and butene. By systematically tuning the structures of the cation and anion and their combination, we obtained the optimized ionic liquid, ADM-C12-SbF6, which exhibited significant enhancements in the C8 selectivities [especially to trimethylpentanes (TMPs)], the research octane number (RON) of the alkylate products, and the lifetime of sulfuric acid. The selectivity to TMPs was improved from 81.9% to 84.5%, and the alkylate RON was improved from 96.6 to 98.6 upon the addition of the ADM-ILs. In addition, the lifetimes of the ADM-IL/H2SO4 systems were increased to twice that of H2SO4 alone. Based on experimental measurements and DFT calculations, all of these enhancements were attributed to the multifunctions cooperatively integrated into the task-specific ADM-ILs, such as surfactant action, improving the interfacial properties of the acid/hydrocarbon biphases; buffer action, stabilizing the acidity changes during the reaction process; and hydride donor action, increasing the H– transfer rate, which promoted the production of TMPs. This study is beneficial for improving the isobutane alkylation process catalyzed by concentrated sulfuric acid.

Treatment of TMP with α-MnO2/CA film coupled with dielectric barrier discharge system: Mechanism and safety assessment

Man Xiao,Chengwu Yi,Muhammad Imran Nawaz,Rongjie Yi,Haoran Liu

The ecological risks from antibiotic residues in water require advanced treatment methods that ensure not just degradation but also complete detoxification. This study develops a highly efficient system coupling dielectric barrier discharge (DBD) plasma reactor with an α-MnO 2 /cellulose acetate (CA) catalytic membrane for the removal and detoxification of trimethoprim (TMP). The catalytic efficiency of the α-MnO 2 /CA films was assessed through comparative experiments within the DBD system, both with and without the films. Key performance indicators included the degradation kinetics of trimethoprim (TMP) in synthetic wastewater, energy efficiency, and reduction rates of total organic carbon (TOC) and chemical oxygen demand (COD). Using response surface methodology (RSM), the optimal conditions for degrading 20 mg/l of TMP were identified as 171.4W, 160 Hz, 5% catalyst loading, and a flow rate of 1200 ml/min, achieving a removal efficiency of 95.48% in 30 min. Variations in solution pH and the concentrations of H 2 O 2 and O 3 were monitored to confirm the catalytic function of α-MnO 2 /CA films. Additionally, quenching experiments demonstrated that free radicals contribute to degradation efficiency, ranking 1 O 2 > · O 2 − > · OH. A comprehensive toxicity assessment combining ECOSAR predictions and in vivo zebrafish embryo tests, confirmed the complete detoxification of the effluent, removal of neurobehavioral toxicity, and oxidative stress. Most importantly, restoring dihydrofolate reductase (DHFR) activity offered direct molecular-level proof that TMP's natural bioactivity was eliminated. This highlights that the DBD-α-MnO 2 /CA system exhibits lower toxicity and minimal bioaccumulation potential, positioning it as an environmentally safe and promising alternative to conventional methods for sustainable, large-scale applications.