Polymers
·
2020
·Vol. 12
·期 3
·714
·
IF 3.426
Lili Ren,Zhihui Yang,Lei Huang,Yingjie He,Haiying Wang,Liyuan Zhang
Here, a nanofiber-exfoliated bacteria cellulose aerogel with improved water affinity and high mass transfer was synthesized. Consequently, poly Schiff base can be uniformly coated within the body of bacteria cellulose aerogel without the traditional dispersion treatment. The composite aerogel has adequate mechanical and thermal stability and high mass transfer efficiency. Such an aerogel can serve as a superior adsorbent for flow through adsorption of pollution. Typically, the adsorption capacity towards Cr(VI), Cu(II), Re(VII), Conga red, and Orange G reaches as high as 321.5, 256.4, 153.8, 333.3, and 370.3 mg g−1, respectively. Moreover, the adsorption by this composite aerogel is very fast, such that, for example, at just 2 s, the adsorption is almost finished with Cr(VI) adsorption. Moreover, the composite aerogel exhibits a good adsorption-desorption capability. This research will hopefully shed light on the preparation of bacteria cellulose-derived macroscopic materials powerful in not only environmental areas, but also other related applications.Keywords:bacteria cellulose;poly Schiff base;chromium;adsorption
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Qing Zhang,Xu Zhou,Ze Zhang,Lingyi Shen,Zhiyong Wang,Hong Xu,Carl Redshaw,Qilong Zhang
Hypochlorous acid (HClO) and sodium hypochlorite (NaClO) are widely present in living organisms and the environment and are closely associated with health or disease in living organisms. Therefore, it is necessary to develop new materials and methods that can detect HClO/ClO − quickly, easily and sensitively. Based on the oxidative property of hypochlorite on the amine bond of diaminomaleonitrile Schiff bases, we have designed and synthesized a ‘Turn-ON’ fluorescent/colourimetric dual-mode probe with high selectivity for HClO/ClO − . In the detection system (DMF: water=1:1, v/v), the addition of HClO/ClO − to the probe was accompanied by a gradual change in the colour of the solution from pink to colourless, with a concomitant 97-fold enhancement of fluorescence intensity at 522 nm (Tun-On), a Stokes shift of 96 nm and a detection limit of 250 nM. A novel HClO/ClO − sensing mechanism in which the imine bond of the probe is oxidized to a carboxyl group by HClO/ClO − was demonstrated by high-resolution mass spectrometry and 1 H NMR spectroscopy. In addition, the probe was applied to the spiked recovery detection of HClO/ClO − in real water samples and the imaging of hypochlorite in cells.
研究领域:
分析化学
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生物医学
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DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2018
·Vol. 220
·期 3
·1800484
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IF 2.492
Xiaoya Ding,Gao Li,Chunsheng Xiao,Xuesi Chen
Schiff base bonds formed by primary amines and aldehydes are attractive for the construction of self-healing and injectable hydrogels. However, biomedical applications of the Schiff base–based (SB) hydrogels are usually limited by their inherent low stability due to the rapid exchange dynamic of the Schiff base bond under physiological condition. Herein, a general method to improve the stability of SB hydrogels by simply doubling the Schiff base linkages at the cross-linking points is proposed. The hydrogels formed by single Schiff base linkage ( hydrogel I ) disorganize into nano-aggregates due to the rapid exchange dynamic of Schiff base bond, while the hydrogels formed by double Schiff base linkage ( hydrogel II ) maintain the gel network for longer times due to the improved stability of the double Schiff base linkage at cross-linking points. Moreover, the hydrogel II displays excellent self-healing and injectable properties due to the rapid dynamic nature of Schiff base bonds.
研究领域:
生物材料学
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医学工程
·
高分子化学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Shasha Yu,Jianxiang Feng,Tao Cai,Shenggao Liu
Normally, the sterically hindered phenols and diphenylamines, used as antioxidants, are added into the base oil simultaneously in order to improve the antioxidant efficiency. In view of this, we have designed a new type of antioxidant which combined the two traditional antioxidants into one molecule with Schiff base. These novel Schiff base bridged phenolic diphenylamine (SPD) antioxidants have been prepared through a one-step synthesis method which is suitable for large-scale production. The thermal stability and antioxidant ability were examined by thermal gravimetric analyzer (TGA) and pressurized differential scanning calorimetry (PDSC), respectively. The results showed that they both had better thermal stability and antioxidant efficiency than the commonly used commercial antioxidants. Importantly, the formulation of SPDs with other additives also exhibited improved antioxidant performances, presenting good application potential in the lubricant industry.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Xiang-yu Kong,Shao-Min Shuang,Yu Wang,Chuan Dong
Herein, we report a new phenolphthalein appended Schiff base (PASB) as reversible fluorescent sensor for the detection of pyrophosphate (PPi) ions through the metal displacement mechanism. PASB showed sensing exclusively toward Al 3+ ions in DMF/H 2 O (v/v = 1/4, pH 5.5) solution, which resulted in a significant fluorescence enhancement at 540 nm. The 1: 2 binding stoichiometry for the complex formation between PASB and Al 3+ was confirmed by Job’s plot and mass spectroscopic studies. Moreover, a solution of the in situ formed PASB–Al 3+ complex displayed a high selectivity to PPi. The addition of PPi to PASB-Al 3+ ensemble significantly quenched its fluorescence. Thus, a dual response was established based on “Off–On–Off” strategy for detection of both Al 3+ and PPi. The detection limit is 5.86 nM and 26 nM for Al 3+ and PPi, respectively. On this basis, we use PASB to detect Al 3+ in food samples. Furthermore, PASB was successfully applicable to detect Al 3+ and PPi for intracellular imaging in Human liver cancer cells.
研究领域:
分析化学
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生物医学
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材料科学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 25
·15420-15431
·
IF 10.733
Xiwei Xu,Songqi Ma,Jiahui Wu,Jintao Yang,Binbo Wang,Sheng Wang,Qiong Li,Jie Feng,Shusen You,Jin Zhu
Two diepoxides containing a two-benzene-ring-conjugated Schiff base when cured with an aromatic diamine result in high-performance thermosets combining excellent controlled degradability, stability and antibacterial properties. Epoxy resins have been widely used in coatings, adhesives, composites, electronic packaging materials, etc., but they are arduous to recycle and have no antibacterial activity. In this paper, two-benzene-ring-conjugated Schiff base diepoxy monomers were synthesized and further cross-linked with 4,4-diaminodiphenylmethane. The chemical structures of the diepoxides as well as their thermosets were characterized in detail. The property investigation manifested that the thermosets possessed a far higher glass transition temperature of ∼206 °C, tensile strength of ∼122 MPa, and tensile modulus of ∼2646 MPa than a commonly used high-performance bisphenol A epoxy resin. Moreover, they possessed excellent acidity and temperature-controlled degradability, and superior stability in common solvents, thermal treatment and hygrothermal aging. Furthermore, they presented excellent coating properties (including hardness, adhesion, and solvent resistance) and antibacterial properties with a bactericidal capability of ∼91%.
研究领域:
材料科学
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化学工程
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生物医学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Pengyun Tan,Xiaotong Zhao,Zengshuai Zhang,Wuji Wei,Jiahao Zhou,Yingqing Shao,Xiaojing Ma,Shuangying Wei,Zhenhua Gao,Shuaiyuan Han
Self-healing materials are the current focus of smart materials research. However, the implementation of self-healing materials remains limited by the challenge of balancing efficient healing properties with high mechanical strength. In this study, N,N′-(4-hydroxy-3-methoxybenzyl) aniline (VPSB) with π–π conjugated structures were prepared by introducing Schiff base bonds between aromatic rings. VPSB is then incorporated into the polyurethane system to synthesize a self-healing waterborne polyurethane vitrimer (VPSB-WPU) containing conjugated aromatic Schiff base bonds. This locally conjugated structure can convert absorbed visible light into thermal energy, which promotes the rapid breaking and formation of Schiff base bonds, resulting in an improved self-healing effect. The results indicated that the topological network of the vitrimer exhibited an activation energy (Ea) of 60.69 kJ/mol and a freezing transition temperature (Tv) of 45.46 °C. After 3 min of visible-light irradiation, the film temperature increased from 6.4 to 91.5 °C, with a photothermal conversion efficiency of 92.13% and a film scratch-healing efficiency of 93.75%. After 25 min of irradiation, the fractured film’s tensile strength after healing was 11.57 MPa. These results demonstrated that VPSB-WPU exhibited vitrimer properties and possessed excellent mechanical strength, photothermal conversion, and self-healing function. A balance between highly efficient healing properties and excellent mechanical strength was achieved by the VPSB-WPU vitrimer, making it highly promising for future applications in material self-healing.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2018
·
IF 3.909
Hao Wu,Chao Teng,Bin Liu,Huafeng Tian,JianGuo Wang
To obtain a safe and biodegradable material for food packaging, this study developed a facile and green process of anchoring nisin onto oxidized cellulose through a simple Schiff base reaction for long-term antimicrobial active food packaging. To the best of our knowledge, this is the first report of such a packaging. The grafting reaction between the amino groups of nisin and the aldehyde groups of oxidized cellulose films was successfully established to obtained a nisin anchored cellulose films (NC) membrane; the structure was characterized with Fourier transform infrared spectroscopy , scanning electron microscopy, and thermogravimetric analysis . The NCs membrane had an outstanding transparent property of above 90% transmittance through 300 nm to 800 nm; while, the barrier properties against oxygen remain excellent. The thermal stability of the NCs membrane remained excellent and enabled an easier degradation than the original cellulose membrane. The NCs membrane displayed good antimicrobial activity against Alicyclobacillus acidoterrestris DSM 3922T in a long-term way, thus demonstrating good potential as food packaging material. The obtained results are promising and confirm the development of NCs membranes as green materials for food packaging.
研究领域:
食品科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2017
·
IF 1.753
Xuefang Shang,Jie Li,Kerong Guo,Tongyu Ti,Tianyun Wang,Jinlian Zhang
Inspired from biological counter parts, chemical modification of Schiff base derivatives with function groups may provide a highly efficient method to detect amino acids . Therefore, a fluorescent probe involving Schiff base and hydroxyl group has been designed and prepared, which showed high response and specificity for Arginine (Arg) among normal eighteen standard kinds of amino acids (Alanine, Valine , Leucine , Isoleucine , Methionine , Asparticacid, Glutamicacid, Arginine, Glycine, Serine , Threonine , Asparagine , Phenylalanine , Histidine , Tryptophan , Proline , Lysine, Glutamine, Tyrosine and Cysteine). Furthermore, theoretical investigation further illustrated the possible binding mode in the host-guest interaction and the roles of molecular frontier orbitals in molecular interplay. In addition, the synthesized fluorescent probe exhibited high binding ability for Arg and low cytotoxicity to MCF-7 cells over a concentration range of 0–200 μg mL −1 which can be also used as a biosensor for the Arg detection in vivo.
研究领域:
生物化学
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分析化学
·
医学检测
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DOI
高影响因子
JOURNAL OF MOLECULAR RECOGNITION
·
2017
·Vol. 31
·期 1
·e2657
·
IF 2.175
Jie Li,Yang Zhang,Yanmei Chen,Xuefang Shang,Tongyu Ti,Hongli Chen,Tianyun Wang,Jinlian Zhang,Xiufang Xu
Inspired by biological related parts, Schiff base derivatives and functional groups of chemical modification can provide efficient detection method of amino acids. Therefore, we have designed and prepared 4 compounds based on Schiff base derivatives involving ─NO 2 , ─OH, and naphthyl group. Results indicated that compound 4 containing 2 nitro groups showed strong sensitivity and high selectivity for arginine (Arg) among normal 18 kinds of standard amino acids (alanine, valine, leucine, isoleucine, methionine, aspartic acid, glutamic acid, arginine, glycine, serine, asparagine, phenylalanine, histidine, tryptophan, proline, lysine, glutamine, and cysteine). Theoretical investigation also approved the strong binding ability of compound 4 for Arg. In addition, compound 4 displayed high combining ability of Arg and low cytotoxicity of MCF-7 cell in the 0 to 150 μg mL −1 of concentration range; it can be used for Arg in vivo detection of fluorescent probe.
研究领域:
生物化学
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分析化学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Guolin Zheng,Dan Zhang,Chuang Zheng,Yajuan Yao,Zhu Long
Inspired by the defects of superoleophobic surface with poor friction resistance and the complicated preparation method, the bio-dopamine was utilized and the friction-durable superoleophobic composite coating was successfully obtained via Schiff base reaction and self-assembly. Dopamine contains the phenolic hydroxyl groups that can react with an amine group or a thiol group. Polydopamine is formed via dopamine self-polymerization under aerobic and weakly alkaline conditions. Additionally, polydopamine can adhere to the surface of virtually all materials. First, the self-polymerization of folic acid induced dopamine to form polydopamine micro-nanoparticles under weakly alkaline conditions. Second, 3,5-Bis(trifluoromethyl)aniline reacted with the phenolic hydroxyl groups of polydopamine nanoparticles via Schiff base reaction. Ammonium hexafluorosilicate was adsorbed on the surface of polydopamine microspheres via electrostatic interactions. Then, the self-assembly behavior of fs-81 and fs-63 with ammonium hexafluorosilicate occurred on polydopamine nanoparticles via electrostatic interactions. Accordingly, the surface roughness was further increased, for which the limitation of traditional methods of using additional nanoparticles to construct hierarchical rough surface was broken. Eventually, the superoleophobic composite coating was applied to the surface of cotton fabric. The results showed that the contact angles of the cotton fabric surface with edible oil, ethylene glycol and glycerol were greater than 150° in the air, respectively, after two cycles of self-assembly modification. The contact angles between the cotton fabric surface and edible oil droplets were still greater than 150°after 25 mechanical abrasion cycles. In addition, the surface free energy of cotton fabric was decreased by 64.1 % after finishing the coating.
研究领域:
材料科学
·
表面工程
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Hongwei Ge,Guoqiang Liu,Ranhao Yin,Zhenli Sun,Hongxia Chen,Long Yu,Pengchen Su,Mingtai Sun,Khalid A. Alamry,Hadi M. Marwani,Suhua Wang
Formaldehyde, a volatile organic compound that is ubiquitous in gas pollutants, has an indelible hazard to the health system of humans. Development of simple and convenient ways for the visual detection of formaldehyde in air is still of importance and challenging. In this paper, we report a new type of fluorescence enhancement probe (FAP), which directly exhibited fluorescence enhancement response to formaldehyde with high sensitivity and selectivity. The FAP was synthesized through the substitution reaction between hydrazine and NBD (7-nitrobenzo-2-oxa-1, 3-diazolyl) chloride, that the hydrazine group acted as both fluorescence quencher based on the photo-induced electron transfer (PET) pathway and reaction triggering factor for selectively recognizing formaldehyde. When the FAP was incubated with a formaldehyde-containing circumstance, Schiff base compound was produced by means of the aldimine condensation reaction which inhibited the PET pathway from hydrazine group to NBD, and thus turned on the fluorescence of the FAP significantly. It is worth mentioning that the FAP showed more remarkable response to formaldehyde under acid conditions. Under the optimal experimental conditions, the FAP responded linearly toward formaldehyde in a wide range of 0.015–0.8 mg•L −1 , while the fluorescence enhancement was close to 30 times. This FAP was successfully used to detect gaseous formaldehyde in indoor air.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 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）