MACROMOLECULAR MATERIALS AND ENGINEERING
·
2016
·Vol. 301
·期 5
·614-624
·
IF 2.834
Alvianto Wirasaputra,Lijun Zheng,Shumei Liu,Yanchao Yuan,Jianqing Zhao
The flame retardancy and mechanical properties of polyamide-6 (PA6)/aluminum diethylphosphinate (AlPi) composite are greatly improved by the addition of novelly synthesized phosphorus flame retardant-based diepoxide (DEP) during extrusion. The PA6/AlPi/DEP composite passes V-0 rating of UL94 test with limiting oxygen index (LOI) of 32.6% at 13 wt% AlPi and 1 wt% DEP, as revealed by the results of flammability. The synergistic flame retardation mechanism offered by the two additives (AlPi and DEP) is studied in terms of in-depth characterization of the charred residue and evolved gas. The deteriorated mechanical strength of PA6 due to existence of AlPi is compensated by the simultaneous chain extension effect of DEP. Accordingly, the flexural and impact strengths of PA6/AlPi/DEP composite are even superior to those of neat PA6.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 47
·8321-8325
·
IF 3.756
Shang-Wei Yuan,Pei-Hui Shan,Mao-Xiao Yang,Pei-Hua Ma,Timothy J. Prior,Carl Redshaw,Gang Wei,Zhu Tao,Xin Xiao
Herein, we have investigated the host–guest inclusion complexes formed on interaction of the symmetric tetramethyl-substituted cucurbit[6]uril (TMeQ[6]) with glycine (Gly) under different conditions. The interactions have been studied both in solution (by 1H NMR spectroscopy and mass spectrometry) and in the solid state by single crystal X-ray diffraction. The molecular structures of two products are reported, namely TMeQ[6]·(H2O)2(PO4)(NH3CH2COOH)2 (1) and TMeQ[6]·Ca(H2O)5·(Cl)3(NH3CH2COOH)·16H2O (2). Complex 1 adopts a hydrogen-bonded dimeric structure with two glycinium ions contained within a TMeQ[6] molecule with the NH3+ portions of the two molecules located just above the opposite rims of the bowl and forming hydrogen bonds with C–O. In 2, there are centrosymmetric dimers bridged by pairs of calcium ions.
研究领域:
化学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Sobia Aslam,Fazle Subhan,Zifeng Yan,Peng Peng,Ke Qiao,Wei Xing,Peng Bai,Rooh Ullah,U.J. Etim,Jingbin Zeng,Muhammad Ikram
In the present contribution, a single step H 2 -reduction strategy was developed for the first time to fabricate nickel-based KIT-6 (Ni-KIT-6) for adsorptive desulfurization of fuels . As-synthesized KIT-6 was used as a support and nickel nitrate, nickel chloride and nickel acetate as a nickel precursor was directly introduced into as-synthesized KIT-6. Ni 0 -based KIT-6 was obtained by single-step H 2 -reduction strategy which not only remove template and decompose nickel precursors to NiO but also reduce NiO to Ni 0 . This strategy is much more convenient and facile than reported strategies for Ni-based mesoporous silica KIT-6. Characterization results show that Ni-KIT-6 with nickel content up to 30 wt.% was highly dispersed due to silanols and confined space in as-synthesized KIT-6. The percentage content (54%) of Ni 0 in the as-synthesized KIT-6 is higher than Ni-based calcined KIT-6 (38%). Interestingly, Ni-based as-synthesized KIT-6 prepared using nickel nitrate as a precursor exhibited stronger nickel-KIT-6 interaction, higher Ni 0 content and dispersion than those prepared with nickel chloride and nickel acetate precursors. We also demonstrate here that the shielding effect of capping anions and hydration degree of different nickel precursors significantly affect the dispersion of nickel species even using as-prepared KIT-6 as a support. As a result, Ni-KIT-6(NO 3 − ) captured 0.195 and 0.12 mmol g −1 of sulfur from model fuel and FCC gasoline, respectively. Thus, single step H 2 -reduction strategy may have potential applications to be applied for fabrication of other nickel based mesoporous silicas for adsorptive desulfurization technology .
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Xiaolian Niu,Longfei Wang,Mengjie Xu,Miao Qin,Liqin Zhao,Yan Wei,Yinchun Hu,Xiaojie Lian,Ziwei Liang,Song Chen,Weiyi Chen,Di Huang
Periodontal defect poses a significant challenge in orthopedics. Guided Bone Regeneration (GBR) membrane is considered as one of the most successful methods applied to reconstruct alveolar bone and then to achieve periodontal defect repair/regeneration. In this paper, a novel polyamide-6/ [email protected] /polyamide-6 (PA6/ [email protected] /PA6) bilayered tissue guided membranes by combining a solvent casting and an electrospinning technique was designed. The developed PA6/ [email protected] /PA6 composites were characterized by a series of tests. The results show that n-HA/PA6 and electrospun PA6/CS layers are tightly bound by molecular interaction and chemical bonding, which enhances the bonding strength between two distinct layers. The porosity and adsorption average pore diameter of the PA6/ [email protected] /PA6 membranes are 36.90 % and 22.61 nm, respectively. The tensile strength and elastic modulus of PA6/ [email protected] /PA6 composites are 1.41 ± 0.18 MPa and 7.15 ± 1.09 MPa, respectively. In vitro cell culture studies demonstrate that PA6/ [email protected] /PA6 bilayered scaffolds have biological safety, good bioactivity, biocompatibility and osteoconductivity.
研究领域:
材料科学
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生物医学工程
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骨科
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组织工程
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DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2023
·
IF 6.1
Qiqi Quan,Zhiwei Liu,Zhaodong Li,Kangliang Pan,Anastasios Koidis,Yi Lei,Xiaoqin Yu,Qiuhua Mo,Xinan Huang,Hongtao Lei
6-Benzylaminopurine (6-BA), a plant growth regulator with cytokinin-like properties, was recently reported to be illegally used in bean sprouts to increase their commercial appearance. It is still nevertheless challenging to quickly detect this adulteration. In this work, four novel haptens (haptens 1–4) of 6-BA were rationally designed with computer-assisted modeling analysis and then synthesized for use as immunizing haptens to produce antibodies. One of two obtained antibodies showed high sensitivity and specificity toward 6-BA. Based on the most sensitive anti-6-BA antibody, an indirect competitive enzyme-linked immunosorbent assay (icELISA) was performed, which demonstrated a 50% inhibition concentration (IC50) of 1.18 μg/L and a limit of detection of 0.075 μg/L. The average recoveries of this icELISA for 6-BA of spiked samples ranged from 87.2 to 95.0% with a coefficient of variation of less than 8.7%. Furthermore, the blind samples were detected simultaneously by the method and HPLC-MS/MS, and the results showed good agreement with each other. Therefore, the proposed icELISA can facilitate the rapid surveillance screening of adulterated 6-BA in sprout vegetables.
研究领域:
食品安全
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生物化学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Jian Zhou,Min Li,Jiaqian Li,Zixuan Shao,Yiman Liu,Tiecheng Wang,Lingyan Zhu
As emerging alternatives of legacy perfluoroalkyl substances, 6:2 fluorotelomer sulfonate (6:2 FTS), 6:2 chlorinated polyfluoroalkyl ether sulfonates (6:2 Cl-PFESA), and perfluorophosphinates (C6/C6 and C8/C8 PFPiAs) are supposed to be partitioned to soil and highly persistent in the environment. The uptake of novel per- and polyfluoroalkyl substances (PFASs) by plants represents a potential pathway for their transfer in the food chain. In this study, the bioavailability of these four novel PFASs in soil and the bioaccumulation characteristics in greenhouse-grown wheat (Triticum aestivum L.), maize (Zea mays L.), soybean (Glycine max L. Merrill), and pumpkin (Cucurbita maxima L.) were investigated. The results indicated that these novel PFASs with higher hydrophobicity were more easily sequestrated in soil, and the fractions extracted by methanol could well describe their bioavailability, which could be stimulated by low-molecular-weight organic acids at rhizospheric concentrations. A negative relationship was found between root soil concentration factors (RSCFs) and hydrophobicity (log Kow) of the target PFASs. This correlation was also found in the translocation factors (TF) from roots to shoots. Furthermore, the uptake and transfer of the target PFASs were regulated by the protein contents in plant roots and shoots.
研究领域:
环境科学
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农业
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毒理学
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植物生理学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2015
·Vol. 91
·期 4
·1199-1207
·
IF 2.349
Xin-Jun Yu,Jie Sun,Jian-Yong Zheng,Ya-Qi Sun,Zhao Wang
BACKGROUND Phytohormones are chemical messengers that have a positive effect on biodiesel production of microalgae at low concentrations. However, the effect of phytohormone 6-benzylaminopurine on lipid and docosahexaenoic acid (DHA) production in marine DHA-producer Aurantiochytrium has never been reported. In this study, a GC-MS-based metabolomics method combined with a multivariate analysis is applied to reveal the metabolic mechanism of 6-benzylaminopurine enhancing production of lipid and DHA in Aurantiochytrium sp.YLH70. RESULTS In total, 71 metabolites were identified by GC-MS. The PCA model revealed that 76.9% of metabolite variation was related to 6-benzylaminopurine treatment, and overall metabolomics profiles between the 6-benzylaminopurine and control groups were clearly discriminated. Forty-six metabolites identified by the PLS-DA model were responsible for responding to 6-benzylaminopurine. Metabolic analysis showed that 6-benzylaminopurine could accelerate the rate of utilization of glucose in Aurantiochytrium sp. YLH70, and the metabolic flux from glycolysis, TCA cycle and mevalonate pathway to fatty acids biosynthesis was promoted. Moreover, the anti-stress mechanism in Aurantiochytrium sp.YLH70 might be induced by 6-benzylaminopurine. CONCLUSION Metabolomics is a suitable tool to discover the metabolic mechanism for improving lipid and DHA accumulation in a microorganism. 6-benzylaminopurine has the potential to stimulate lipid and DHA production of Aurantiochytrium sp.YLH70 for industrial purposes. © 2015 The Authors. Journal of Chemical Technology & Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
研究领域:
生物化学
·
海洋生物学
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
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2022
·
IF 5.436
Zhi Hua Zhang,Li Xia Chen,Yun Qian Zhang,Qian Jiang Zhu,Kai Chen,Zhu Tao
The anion-induced outer surface interaction of Q[n]s is an important driving force in the construction of Q[n]-based supramolecular frameworks. In this work, a symmetric tetramethyl-substituted cucurbit[6]uril (TMeQ[6]) is selected as the basic structural block. Using the anion-induced outer surface interaction of Q[n]s derived from [CdxCly]n− anions formed by Cd2+ cations in a HCl medium, four different TMeQ[6]-[CdxCly]n−-based supramolecular frameworks are constructed. Three of the most common TMeQ[6]-[CdxCly]n−-based supramolecular frameworks are selected for further vulcanization, and three different CdS/TMeQ[6]-based framework catalysts with different structures and properties are obtained. The catalytic activities of these three CdS/TMeQ[6]-based framework catalysts are investigated by the coupling photocatalytic reaction of aminobenzyl, and the results showed that the catalytic activities of the three catalysts are all higher than that of pure CdS. Therefore, this work establishes that it is possible to establish a method for synthesizing the Q[n]-based framework-supported catalysts by first synthesizing TMeQ[6]-[CdxCly]n−-based supramolecular frameworks and then forming Q[n]-based framework supported catalysts by sulfurization or reduction.
研究领域:
材料科学
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催化化学
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DOI
PubMed
高影响因子
IONICS
·
2021
·Vol. 27
·期 9
·4097-4104
·
IF 2.817
Yao Cheng,Song Yiheng,Lu Yao,Gao Zhaodongfang,Yang Quanling,Xiong Chuanxi
A liquid-like poly(6-chloroindole) (L-P6CIn) was prepared via a chemical oxidative polymerization in ethanol/water miscible solvents. (NH 4 ) 2 S 2 O 8 was used as an oxidant and nonylphenol polyoxyethylene ether sulfate (NPES, CH 3 (CH 2 ) 8 C 6 H 4 (OCH 2 -CH 2 ) 10 SO 3 H) acted as the dopant agent. In contrast to the agglomeration behavior of the eigenstate poly(6-chloroindole) (E-P6CIn), such liquid-like poly(6-chloroindole) doped by NPES appeared as well-dispersed core–shell nanoparticles. Moreover, L-P6CIn was flowable at or near room temperature and was dissoluble in many solvents and exhibited a high electric conductivity of 2 S m −1 at room temperature and 10 S m −1 at 50 ℃. Also, L-P6CIn was a good blue-light emitter. The combination of the liquid behavior, excellent solubility, good electric conductivity, and blue photoluminescence property makes L-P6CIn a promising precursor for applications such as lightweight battery, super capacitor, and anti-corrosion of metals and organic laser.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 11
·3658-3663
·
IF 4.052
Naike Shi,Qilong Gao,Andrea Sanson,Qiang Li,Longlong Fan,Yang Ren,Luca Olivi,Jun Chen,Xianran Xing
Negative thermal expansion (NTE) behavior is an interesting physical phenomenon, but the number of NTE materials is limited. In this study, a new NTE compound has been found, FeFe(CN)6 Prussian blue analogue, where the average linear coefficient of thermal expansion (αl) is −4.260 × 10−6 K−1 between 100 and 450 K. The NTE properties and local vibration dynamics have been investigated by joint experiments of synchrotron X-ray diffraction, X-ray pair distribution function, and extended X-ray absorption fine structure spectroscopy. It has been observed that the Fe–C/Fe–N bonds expand with increasing temperature, while the unit cell shrinks in FeFe(CN)6. The vibration directions of both Fe–C and Fe–N prefer to be perpendicular to the linkage of Fe–CN–Fe rather than being parallel. More pieces of evidence indicate that the transverse vibrations of N atoms dominate the NTE behavior of FeFe(CN)6. The present results prove directly that the transverse thermal vibrations of C and N atoms are crucial for the occurrence of the NTE of Prussian blue analogues.
研究领域:
材料科学
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物理化学
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2015
·
IF 2.353
Ai Ping Li,Jing Dong Peng,MingQiong Zhou,Jin Zhang
A simple, fast, costless, sensitive and selective method of resonance light scattering coupled with HPLC was established for the determination of 6-mercaptopurine in human urine sample. In a Britton–Robinson buffer solution of pH 5.5, the formation of coordination complex between 6-mercaptopurine and metal palladium (II) led to enhance the RLS intensity of the system. The RLS signal was detected by fluorescence detector at λ ex = λ em = 315 nm. The analytical parameters were provided by the coupled system, the linear of 6-mercaptopurine response from 0.0615 to 2.40 μg L − 1 and the limit of detection (S/N = 3) was 0.05 μg L − 1 . The presented method has been applied to determine 6-mercaptopurine in human urine samples which obtained satisfactory results. Moreover, the reaction mechanism and possible reasons for enhancement of RLS were fully discussed.
研究领域:
分析化学
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药物分析
·
医学检验
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Zhujun Wang,Qian Li,Zheming Chen,Jinfeng Liu,Tengfei Liu,Huayi Li,Shuirong Zheng
To improve the effective thermal conductivity of hexagonal boron nitride (h-BN) in polymer matrix, surface modification upon it could be a usual and efficient method. Boron nitride nanosheets (BNNSs) were abundantly decorated by amino groups via a two-step reaction. The prehydroxylation of BNNSs in a concentrated base environment could increase the active reaction sites on the surface of BNNSs, so that aniline carbocations produced by the hydrolysis of the diazonium salt were utilized to achieve a high grafting content of aniline groups onto the surface of modified BNNSs (A-BNNSs). During melt blending, chemical reactions between A-BNNSs and the carboxyl groups of PA6 chains benefited the interfacial force between A-BNNSs and PA6 matrix; thus, the distribution of A-BNNSs in PA6 matrix was enhanced. Consequently, the prepared PA6/A-BNNSs nanocomposites had improved thermal conductivity, better thermal stability, and enhanced mechanical properties compared with the PA6/BNNSs nanocomposites at the same filler content. In particular, as for PA6/A-BNNSs nanocomposites with 20 wt % filler loading, its thermal conductivity was 2.886 W·m–1·K–1, nearly 10 times that of pure PA6, and its initial decomposition temperature was nearly 100 °C higher than that of pure PA6, which would be a popular candidate for the thermal conductivity field.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）