Materials Today Communications
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2023
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IF 3.8
Jinmin Zhao,Juanli Chen,Liting He,Youhua Cao,Chengqiang Peng,Jing Fang,Zhongyu Duan,Hao Li
Polyvinylidene fluoride membranes (PVDFMs) are frequently used in oil-water separation due to their stable properties, high porosity, and modification easily. However, the pollution, low separation efficiency, and low recovery rate of PVDFMs have limited the oil sewage treatment. This work is based on dopamine-modified PVDFMs, which prepared hydrophilic separation membranes by attaching hydroxymethylated lignin (HAL) to PVDFMs. Lignin was hydroxymethylated to improve its hydrophilicity. Additionally, HAL was assembled on the surface of PVDFMs with the effect of dopamine (DA) and 3-aminopropyltriethoxysilane (KH550). The effect of the ratio of DA and KH550 (D: K) and HAL concentration on the hydrophilic effect was explored. The modified membranes exhibited considerable separation efficiency (>99 %) for several kinds of oil-water emulsions and could be recycled multiple times. This green modification method using lignin provides an environmentally friendly solution for modifying PVDFMs.
研究领域:
环境科学
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材料科学
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高影响因子
MICROCHIMICA ACTA
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2020
·Vol. 187
·期 3
·1-8
·
IF 6.232
Chen Yan,Yin Huanshun,Sui Chengji,Fu Weizhang,Yang Yue,Ai Shiyun
A photoelectrochemical method was proposed for DNA hydroxymethylation determination using black TiO 2 (B-TiO 2 ) nanosphere as photoactive material and ZnO as photoactivity inhibitor. After hydroxymethylated DNA (5hmC-DNA) was captured on the probe modified B-TiO 2 /ITO electrode surface through hybridization, a glycosyl can be then transferred from uridine diphosphoglucose to 5hmC-DNA and formed a covalent structure with –CH 2 OH in the presence of T4 β-glucosyltransferase (β-GT). Afterwards, based on a series of covalent reaction, amino functionalized ZnO nanoparticles are further immobilized to the surface of the electrode. Due to the capacity to expend the irradiation light and the photogenerated electron of electron donor, the modified ZnO nanoparticles can result in a decreased photocurrent. The developed method shows wide linear ranges from 0.05-200 nM for hydroxymethylated DNA and 1-220 unit·mL −1 for T4-β-glucosyltransferase. The corresponding determination limits were 0.013 nM and 0.24 unit·mL −1 , respectively. The enzyme activity inhibited by 4-phenylimidazole was evaluated. This photoelectrochemical method shows high specificity for 5hmC-DNA (compared to 5fC, 5mC, m6A, control) and β-GT (compared to β-AGT, UGT2B7), and shows excellent stability for testing 5hmC (RSD = 2.75%).
Schematic representation of photoelectrochemical method for DNA hydroxymethylation and β-glucosyltransferase detection based on the glycosylation reaction of –CH 2 OH in 5-hydroxymethylcytosine and the inhibition activity of ZnO to the photoactivity of black TiO 2 nanospheres.
研究领域:
生物化学
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分子生物学
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分析化学
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
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IF 6.035
Zhen Li,Tiantian Cao,Yun Zhang,Yu Han,Shengming Xu,Zhenghe Xu
Hydroxymethyl functionalized poly(ether ether ketone) (OHPEEK) was exploited as the separator of lithium ion battery (LIB). The stable OHPEEK backbone endows the membrane with high anti-shrinkage property (0% until 160 °C and only 18.3% at 240 °C) and high thermal stability (degradation temperature up to 282 °C). Due to the abundant polar groups of the OHPEEK, the wettability of OHPEEK membrane is improved, reflected by that the contact angle reduces to 24.6 °C, and the electrolyte uptake rises to 204% at 30 °C. The OHPEEK membrane shows a higher conductivity in the electrolyte (1 M LiPF 6 /EC/DME) compared with the Celgard 2400 PP separator. As a result, the LIB with the OHPEEK membrane possesses 0.3%–36.8% higher discharge capacity at the C-rate from 0.1 to 4 C and satisfactory cycling performance.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
Materials Today Chemistry
·
2022
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IF 7.613
Yulin Zheng,Yunlei Zhou,Xiaoting Cui,Huanshun Yin,Shiyun Ai
The photoactivity of CdS nanorods was greatly improved by amino functionalized accordion-like MXene and spherical ZnSnO 3 . MXene possesses good electron transfer capability and ZnSnO 3 presents matched energy band with CdS, which deeply accelerate the electron transfer and prevent the recombination of photogenerated electron-hole pair, leading to a strong photoelectrochemical (PEC) response. Taking the merit of the improved photoactivity of CdS nanorods, a novel PEC biosensor was constructed for DNA hydromethylation detection based on immune recognition of target molecule, where 5-hydroxymethyl-2′-deoxycytidine triphosphate (5hmdCTP) was employed as detect target, CdS/MXene was used as photoactive material, and ZnSnO 3 was adopted as signal amplification unit. Under enzymatic covalent reaction of –CH 2 OH of 5hmdCTP with –NH 2 of MXene, 5hmdCTP was specifically recognized and captured. Then, taking advantages of the covalent reaction between phosphate group of 5hmdCTP and ZnSnO 3 , the signal amplification unit was captured. Under the optimum conditions, this PEC biosensor presents wide linear range of 0.008–100 nM and low detection limit of 4.21 pM (3σ). The applicability of the developed method was evaluated by investigating the effect of Cd 2+ and perfluorohexane compound pollutant on 5-hydroxymethylcytosine content in the genomic DNA of the roots and leaves of wheat seedlings.
研究领域:
生物传感器
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环境科学
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2020
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IF 5.162
Yinchen Chen,Hui Zhang,Zhaodong Zhu,Shiyu Fu
Lignin is a good candidate for the polymerization and chemical modification to prepare sustainable chemicals and materials, but a relatively low hydroxyl content becomes an obstacle for the preparation of lignin-based polyurethane (PU) adhesives. In order to improve its reactivity, the acetic acid lignin (AAL) was hydroxymethylated before copolymerized with isocyanate during the preparation of PU adhesives. The hydroxymethylation was carried out in an alkaline formaldehyde solution and it was found that 85 °C is the optimal temperature. On that condition, the free formaldehyde content of the corresponding product HL-6 was as low as 0.32%, while the hydroxymethyl was increased by 189.11% compared with original AAL and reached 2.92 mmol/g. In the polymerization of PU adhesives, the hydroxymethylated lignin with a higher aliphatic hydroxyl content formed a more compact three-dimensional urethane cross-linking network with isocyanate. The mechanical properties and thermal stability of the lignin-based PU adhesive were improved by 15–30 wt% in HL-6, and particularly the tensile strength was increased by 21–41 MPa, which indicated that the hydroxymethylation is an efficient way to enrich the hydroxyl in lignin, and the modified lignin is adequate to partially replace petroleum-based polyols for the preparation of PU adhesives with excellent properties.
研究领域:
材料科学
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化学工程
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DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
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2024
·Vol. 31
·期 6
·1-14
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IF 2.6
Sun Yumiao,Wang Ting,Zeng En
The uncertainty of the structure of melamine-formaldehye polymer is one of the important factors limiting its widespread application. The chemical reactions of melamine are almost always reversible, so controlling the microstructure is difficult. For the synthesis of polymer particles in water, it is unclear how the type of catalyst affects the microstructure of melamine-formaldehye polymers. Therefore, we conducted a detailed study to understand how different catalyst types( including 10% NaOH, trimethylamine, and a Na 2 CO 3 -NaHCO 3 buffersolution)affect the hydroxymethylation reaction, structure and the thermal properties of the melamine-formaldehye polymer). The results showed that with the same molar ratio and pH conditions, the use of triethylamine as catalyst in the melamine-formaldehye polymer increased the possibility of side reactions in the hydroxymethylation reaction. However, the occurrence of side reactions has a favorable effect on the thermal properties of melamine-formaldehyepolymers. Specifically, melamine formaldehyde polymers synthesized using triethylamine as a catalyst exhibit higher thermal decomposition characteristic temperatures, lower kinetic values, and higher reactivity. These results provide insights into the effect of catalyst type on the reaction mechanism, microstructure and thermal properties of melamine-formaldehye polymers, which may prove useful for their improved and controlled synthesis.
研究领域:
材料科学
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化学工程
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高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2014
·Vol. 52
·期 14
·1989-1999
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IF 3.245
Shimin Zhang,Jingkun Xu,Baoyang Lu,Leiqiang Qin,Long Zhang,Shijie Zhen,Daize Mo
2-((2,3-Dihydrothieno[3,4- b ]dioxin-2-yl)methoxy)methyl oxirane (EDOT-MO) was successfully synthesized by the reaction of epichlorohydrin with hydroxymethylated-3,4-ethylenedioxylthiophene (EDOT-MeOH), which was synthesized via a simple four-step sequence. Poly(hydroxymethylated-3,4-ethylenedioxylthiophene) (PEDOT-MeOH) and poly(2-((2,3-dihydrothieno[3,4- b ]dioxin-2-yl)methoxy)methyl oxirane) (PEDOT-MO) were electrosynthesized through electropolymerization of EDOT-MeOH and EDOT-MO, respectively. Structural, electrochemical, optical, and thermal properties of as-formed polymers were investigated by FTIR, cyclic voltammetry, UV–vis, and thermogravimetry. Spectroelectrochemistry studies demonstrated that PEDOT-MeOH and PEDOT-MO could be reversibly oxidized and reduced accompany with obvious color changes. Further kinetic studies demonstrated that the introduction of hydroxymethyl or ethylene oxide group significantly improved electrochromic properties of 3,4-ethylenedioxythiophene (PEDOT) and resulted in high contrast ratios (57.3% at 585 nm) and coloration efficiencies (338.5 cm 2 C −1 ), low switching voltages, and fast response time. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014 , 52 , 1989–1999
研究领域:
材料科学
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电化学
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高分子化学
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DOI
高影响因子
JOURNAL OF CATALYSIS
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2019
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IF 7.723
Huan Liu,Lei Liu,Wen-Di Guo,Yong Lu,Xiao-Li Zhao,Ye Liu
The complexation of IrCl 3 ⋅3H 2 O with the electron-deficient phosphines ( L1 - L6 ) respectively afforded a bi-functional catalyst possessing the dual functions of transition metal complex (Ir III -P) and Ir III -Lewis acid for tandem hydroformylation-acetalization of olefins. The best result was obtained over L5 -based IrCl 3 ⋅3H 2 O catalytic system which corresponded to 97% conversion of 1-hexene along with 92% selectivity to the target acetals free of any additive. The crystal structure of the novel Ir III -complex of Ir III -L4 indicated that the electron-deficient nature of the involved phosphine warranted Ir-center in +3 valence state without reduction, which served as the Lewis acid catalyst for the subsequent acetalization of the aldehydes as well. Moreover, as an ionic phosphine, L6 -based IrCl 3 ⋅3H 2 O system immobilized in RTIL of [Bmim]PF 6 could be recycled for 6 runs without the obvious activity loss or metal leaching.
研究领域:
化学
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催化化学
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有机合成
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DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
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2022
·
IF 6.064
Lv Xianqing,Luo Xiaolin,Cheng Xin,Liu Jing,Li Changzhi,Shuai Li
Hydroxymethylfurfural (HMF) derivatives such as 2,5-bis(hydroxymethyl)furan (BHMF) and furandicarboxylic acid (FDCA) are promising alternative of fossil-based diols and dicarboxylic acids for synthesis of polyesters such as polyethylene terephthalate (PET). However, high cost for preparing HMF from biomass discourages the commercialization of HMF-derived polyesters. Since producing furfural (FUR) from five-carbon sugars (e.g., xylose) via dehydration is an inexpensive and commercialized process, we herein reported a method to synthesize BHMF derivatives (5-(ethoxymethyl)furan-2-methanol (EMFM), 2,5-bis(hydroxymethyl)furan monoacetate (BHMFM) and 2,5-bis(hydroxymethyl)furan diacetate (BHMFD) from furfural derivatives, i.e., (2-(ethoxymethyl)furan (EMF) and furfuryl acetate (FA)). To avoid strong acid-induced side reactions (e.g., furan ring opening, condensation and carbonization), two reaction systems, i.e., a low-concentration HCl aqueous solution combined with formaldehyde and anhydrous acetic acid combined with paraformaldehyde, were found to be suitable for such a hydroxymethylation reaction and could lead to decent product yields. In order to improve the carbon utilization, condensed furanic byproducts were further converted into hydrocarbon fuels via a reported two-step hydrodeoxygenation (HDO) process. This study not only validates the possibility of synthesizing functional HMF derivatives (EMFM, BHMFM, and BHMFD) from commercially-available FUR derivatives (EMF and FA), but also provide a new way to transform condensed furanics to value-added hydrocarbon fuels.
研究领域:
化学工程
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生物质转化
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可再生材料
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DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2023
·
IF 6.8
Cuiping Li,Mengfan Pang,Yaping Li,Lirong Han,Yajiao Fan,Xuelian Xin,Xian Zhang,Ning Zhang,Yan Qin
Tetrachlorobenzoquinone (TCBQ) is an active metabolite of pentachlorophenol, and stimulates the accumulation of ROS to trigger apoptosis. The preventive effect of vitamin C (Vc) against TCBQ-induced apoptosis in HepG2 cells is unknown. And there is little known about TCBQ-triggered 5-hydromethylcytosine (5hmC)-dependent apoptosis. Here, we confirmed that Vc alleviated TCBQ-induced apoptosis. Through investigating the underlying mechanism, we found TCBQ downregulated 5hmC levels of genomic DNA in a Tet-dependent manner, with a particularly pronounced decrease in the promoter region, using UHPLC-MS-MS analysis and hydroxymethylated DNA immunoprecipitation sequencing. Notably, TCBQ exposure resulted in alterations of 5hmC abundance to ∼91% of key genes at promoters in the mitochondrial apoptosis pathway, along with changes of mRNA expression in 87% of genes. By contrast, 5hmC abundance of genes only exhibited slight changes in the death receptor/ligand pathway. Interestingly, the pretreatment with Vc, a positive stimulator of 5hmC generation, restored 5hmC in the genomic DNA to near-normal levels. More notably, Vc pretreatment further counter-regulated TCBQ-induced alteration of 5hmC abundance in the promoter with 100% of genes, accompanying the reverse modulation of mRNA expressions in 89% of genes. These data from Vc pretreatment supported the relationship between TCBQ-induced apoptosis and the altered 5hmC abundance. Additionally, Vc also suppressed TCBQ-stimulated generation of ROS, and further increased the stability of mitochondria. Our study illuminates a new mechanism of TCBQ-induced 5hmC-dependent apoptosis, and the dual mechanisms of Vc against TCBQ-stimulated apoptosis via reversely regulating 5hmC levels and scavenging ROS. The work also provided a possible strategy for the detoxification of TCBQ.
研究领域:
毒理学
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分子生物学
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细胞生物学
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药理学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Xin Zhao,Zeyu Zhang,Jinyin Pang,Ling Su
Formaldehyde attacks the ortho phenolic hydroxyl groups on the p-hydroxyphenyl and guaiac-based structures in the lignin, shedding the hydrogen atom on the ortho-position carbon and grafting hydroxymethyl group to obtain the hydroxymethylated modified lignin (HMKL). The infrared spectroscopy , hydrogen NMR spectroscopy, thermogravimetric (TG), and derivative thermogravimetric (DTG) analysis show that the hydroxymethylation modification of alkali lignin is successful. Then, lignin nanoparticles (LNPs) are prepared by the acid precipitation self-assembly method in ethylene glycol solution of hydroxymethylated modified lignin. The particle size and shape of lignin nanoparticles are determined by scanning electron microscopy and dynamic light scattering (DLS) analysis. In the liquefaction agent prepared from polyethylene glycol 400 and glycerol, the graft polyol is liquefied under methanesulfonic acid . The Fourier transform infrared spectroscopy , hydrogen NMR, and thermogravimetric analysis indicate the successful formation of nano-lignin polyols. In addition, epoxy resin is synthesized by two-step epoxidation of nano-lignin polyols including ring-opening and closed-loop epoxidation in an alkaline environment. The prepared epoxy resin from nano-lignin polyol exhibits excellent performance and wide application prospects. The optimum process conditions are the mass fraction of LNP-P is 19.98 %, the amount of catalyst (NaOH) is 20.10 %, the reaction time is 6.99 h, the solid content of the epoxy resin is 57.05 %, the viscosity is 615.58 mPa.s, the tensile strength is 44.80 MPa, the elastic modulus is 2.77 GPa.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2014
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IF 1.178
Yuan-Yuan Yao,Long Zhang,Zi-Fei Wang,Jing-Kun Xu,Yang-Ping Wen
A simple and sensitive platinum nanoparticles/poly(hydroxymethylated-3,4-ethylenedioxylthiophene) nanocomposite (PtNPs/PEDOT-MeOH) modified glassy carbon electrode (GCE) was successfully developed for the electrochemical determination of quercetin. Scanning electron microscopy and energy dispersive X-ray spectroscopy results indicated that the PtNPs were inserted into the PEDOT-MeOH layer. Compared with the bare GCE and poly(3,4-ethylenedioxythiophene) (PEDOT) electrodes, the PtNPs/PEDOT-MeOH/GCE modified electrode exhibited a higher electrocatalytic ability toward the oxidation of quercetin due to the synergic effects of the electrocatalytic activity and strong adsorption ability of PtNPs together with the good water solubility and high conductivity of PEDOT-MeOH. The electrochemical sensor can be applied to the quantification of quercetin with a linear range covering 0.04–91 μmol L −1 and a low detection limit of 5.2 nmol L −1 . Furthermore, the modified electrode also exhibited good reproducibility and long-term stability, as well as high selectivity.
研究领域:
分析化学
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材料科学
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药学
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DOI
高影响因子
危险品化学品经营许可证（带存储）