CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Xu Su,Han Fang,Hao Yang,Fangfang Zou,Gang Li,Lian Wang,Hongxin Liao,Wei Guan,Xuebu Hu
Polysaccharides can be potential binders for lithium-ion batteries due to their strong adhesion through numerous hydroxyl groups . As a novel waterborne lithiated polysaccharide derivative, cellulose sulfate lithium (CSL) is successfully synthesized and used as the binder for LiFePO 4 (LFP) cathode. The chemical structure of CSL is verified by FTIR-ATR, XRD, C 13 -NMR, GPC , EA , ICP and TGA . Compared to LFP cathode using polyvinylidene difluoride binder, electrochemical measurements show that the LFP cathode using CSL (LFP-CSL) has lower polarization and better rate performance owing to higher lithium-ion conductivity of CSL. The result of morphological analysis indicates that CSL binder can maintain an integrated LFP cathode structure during hundreds of cycles. As a result, the LFP-CSL cathode exhibits a discharge capacity of 133.4 mAh g −1 and maintains remarkable cycle stability with retention of 93.1 % after 300 cycles at 1C. These findings provide novel insights into the rational design of the binders for the LFP cathode.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2019
·
IF 2.12
Hong-Liu Jiang,Meng-Ya Xu,Ze-Wu Xie,Wei Hai,Xiao-Lin Xie,Fu-An He
β-cyclodextrin (β-CD) was firstly crosslinked by tetrafluoroterephthalonitrile and then modified by ethanolamine (EA) to form a novel β-cyclodextrin-based polymer (EA-CDP). The microstructure and the properties of the EA-CDP were characterized by SEM , MIP, 13 C NMR, FTIR , water contact angle measurement, zeta potential measurement, and TGA . The resultant EA-CDP could effectively select the anionicmethyl orange (MO) dye from the mixed-dye aqueous solution of MO and cationic methylene blue (MB) dye. The absorption capacity of the EA-CDP for anionic dyes including MO and Congo red (CR) increased with the decreasing pH value. The pseudo-second-order kinetic was more ideal to describe the absorption behavior of EA-CDP for MO and CR than the pseudo-first-order model. According to the fitting result of the Langmuir equation, the maximum absorption capacity of the EA-CDP for MO and CR reached as high as 602 mg/g and 1085 mg/g, respectively. Such a high absorption capacity could be ascribed to the triple absorption effects of the EA-CDP for anionic dyes including porous network capture, inclusion complextion, and electrostatic attraction.
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
CHROMATOGRAPHIA
·
2016
·Vol. 79
·期 17
·1197-1205
·
IF 1.332
Zhang Zhongyi,Xiao Huayun,Zheng Nengjian,Gao Xiaofei,Zhu RenGuo
Individual free amino acid δ 15 N values in plant tissue reflect the metabolic pathways involved in their biosynthesis and catabolism and could thus aid understanding of environmental stress and anthropogenic effects on plant metabolism. In this study, compound-specific nitrogen isotope analysis of amino acid by gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS) was carried out to determine individual free amino acid δ 15 N values. High correlations were observed between the δ 15 N values obtained by GC-C-IRMS and elemental analyzer-isotope ratio mass spectrometry (EA-IRMS) determinations, and the mean precision measured was better than 1 ‰. Cation-exchange chromatography was employed to purify the sample, and the difference between prior to and following passage through the resin was within 1 ‰. The amino acid δ 15 N values of plant leave samples following incubation in 15 N-nitrate at different time points were determined. A typical foliar free amino acid 15 N-enrichment pattern was found, and glutamine was the most rapidly labeled amino acid; other amino acids derived from the GS-GOGAT cycle were also enriched. The pyruvate family amino acids were labeled less quickly followed by the aromatic amino acids. This study highlighted that amino acid metabolism pathways had a major effect on the δ 15 N values. With the known amino acid metabolism pathways and δ 15 N values determined by the presented method, the influence of various external factors on the metabolic cycling of amino acid can be understood well.
研究领域:
植物生理学
·
同位素地球化学
·
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
Acta Biomaterialia
·
2025
·
IF 9.6
Yuanqi Chen,Kezheng Lei,Yinxi Li,Zhixiang Mu,Tengda Chu,Jiajun Hu,Bairui Zeng,Yi Wang,Jianliang Shen,Xiaojun Cai,Tianpeng Shi,Hui Deng
Oral mucosal wounds are more prone to inflammation due to direct exposure to various microorganisms. This can result in pain, delayed healing, and other complications, affecting patients' daily activities such as eating and speaking. Consequently, the overall quality of life for patients is significantly reduced. To address these challenges, we developed a multifunctional therapeutic nanoplatform, DATS@Arg-EA-SA, through the self-assembly of guanidinated dendritic peptides (Arg-EA-SA) that encapsulate diallyl trisulfide (DATS), a hydrogen sulfide (H 2 S) donor. The guanidine-rich surface of DATS@Arg-EA-SA efficiently neutralizes reactive oxygen species (ROS) in the ulcer microenvironment, generating nitric oxide (NO), which acts as the primary antimicrobial agent by disrupting bacterial membranes. Concurrently, the presence of glutathione triggers the release of H 2 S from DATS, providing supplementary antibacterial support. DATS@Arg-EA-SA effectively kills all bacteria, achieving results comparable to those of penicillin, a classical antibiotic. Moreover, it demonstrates superior sterilization efficacy against drug-resistant bacteria, such as methicillin-resistant Staphylococcus aureus (MRSA), significantly outperforming penicillin. Following the initial antimicrobial phase, the nanoplatform transitions into an anti-inflammatory stage. H 2 S, in synergy with NO, facilitates the conversion of M1 macrophages to M2 macrophages, thereby reducing the expression of inflammatory factors. Importantly, the combination of H 2 S and NO provides effective analgesia by downregulating the expression of TRPV1 and TRPV4, thus restoring normal dietary behaviors and improving the overall quality of life. This system ultimately promotes collagen fiber deposition and accelerates the re-epithelialization of the ulcer wound, positioning DATS@Arg-EA-SA as a promising gas-delivery nanoplatform for rapid wound repair in the clinical treatment. Statement of Significance Oral mucosal wounds are highly susceptible to microbial infections, leading to inflammation, pain, delayed healing, and a significant decline in quality of life. We developed a multifunctional therapeutic nanoplatform (DATS@Arg-EA-SA) via the self-assembly of guanidinated dendritic peptides encapsulating the H 2 S donor DATS, which exhibited antibacterial, anti-inflammatory, and analgesic properties. In the oral ulcer microenvironment, DATS@Arg-EA-SA generates substantial NO under elevated ROS levels, while glutathione triggers the controlled release of H 2 S. NO disrupts bacterial membranes as the primary antibacterial agent, with H 2 S providing synergistic antibacterial effects. Furthermore, H 2 S and NO synergistically promote the transformation of M1 to M2 macrophages, attenuating inflammation. Importantly, the combined action of H 2 S and NO alleviates pain by downregulating TRPV1 and TRPV4, supporting the restoration of normal dietary behavior and improving quality of life.
研究领域:
药学
·
纳米技术
·
生物材料
·
医学
·
牙科
·
炎症研究
·
伤口愈合
✓ 已验证
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 191
·期 1
·1-12
·
IF 5.7
Zhang Mingxia,Tan Wei,Wu Xiaodan,Wan Chengan,Wen Chen,Feng Lei,Zhang Feng,Qu Fengyu
The present study selected 5, 5′-((6-(ethylamino)-1, 3, 5-triazine-2, 4-diyl) bis(azanediyl))diisophthalic acid (H 4 EATDIA) as ligand and an amino-functionalized cuprum-based MOF (EA-JUC-1000), successfully synthesized by microwave-assisted method, for proton conduction and dopamine sensing applications. In order to enhance the proton-conducting potential of EA-JUC-1000, the Brönsted acid (BA) encapsulated composites (BA@EA-JUC-1000) are dopped into chitosan (CS) to form a series of hybrid membranes (BA@EA-JUC-1000/CS). The impedance results display that the best proton conductivity of CF 3 SO 3 H@EA-JUC-1000/CS-8% reaches up to 1.23 × 10 –3 S∙cm −1 at 338 K and ~ 98% RH, 2.6-fold than that of CS. Moreover, the EA-JUC-1000 is in-situ combined with reduced graphene oxide (rGO) (rGO/EA-JUC-1000), which makes EA-JUC-1000 have a wide detection range (0.1 ~ 500 μM) and a low limit of detection (50 nM), together with good anti-interference performance, reproducibility and repeatability. In addition, the electrochemical sensing method has been successfully applied to detect DA in bovine serum samples. The dual-functional MOF-based hybrid membrane and composites including proton conduction and DA sensing would provide an example of practical application for MOFs. Graphical abstract
研究领域:
材料科学
·
电化学
·
分析化学
·
纳米技术
✓ 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）