COMPOSITES SCIENCE AND TECHNOLOGY
·
2023
·
IF 9.1
Qingting Liu,Zhiwei Ling,Xiaohe Wang,Xudong Fu,Wenzhuo Wu,Chunyong Xiong,Bei Wang,Rong Zhang,Xiao Li,Feng Zhao,Xujin Bao,Shengfei Hu,Jun Yang
To prevent phosphoric acid (PA) from leaching and harming traditional polybenzimidazole-based proton exchange membranes , polyethyleneimine-confined halloysite nanotubes (PEI@HNTs) were embedded in poly (2,5-benzimidazole) membranes to construct rich ion pairs that stably conducted protons. With the aid of supercritical carbon dioxide , PEI oligomers with basic groups were confined in HNTs. Then, through in-situ synthesis, highly-dispersed PEI@HNT enhanced the mechanical stability of composite membranes , whose basicity improved the absorption and retention capacity of PA. The PEI@HNTs/ABPBI composite membrane exhibited excellent mechanical strength and electrical performance over a temperature range of 40–180 °C. The through-plane proton conductivity of the 5%PEI@HNTs/ABPBI composite membrane was 0.061 S cm −1 at 98% relative humidity and 90 °C and 0.049 S cm −1 under anhydrous conditions at 180 °C. This performance was attributed to strong hydrogen bonding between PEI and PA, as well as the excellent retention of bound water within the HNTs. The peak power density of PA-doped 5%PEI@HNTs/ABPBI composite membrane reached 0.235 W cm −2 and 0.418 W cm −2 at 120 °C and 180 °C under anhydrous conditions, respectively, which were 1.68 and 1.96 times higher than those obtained with the pristine PA-ABPBI membrane. These results highlight the potential of this composite membrane for applications requiring a wide temperature range.
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高影响因子
Polymers
·
2020
·Vol. 12
·期 3
·536
·
IF 3.426
Xiufang Li,Hui Liu,Zhiwei Deng,Wenqing Chen,Tianhao Li,Yunshan Zhang,Zhuomin Zhang,Yao He,Zhijian Tan,Shian Zhong
Novel PEGylated thermo-sensitive bionic magnetic core-shell structure molecularly imprinted polymers (PMMIPs) for the specific adsorption and separation of bovine serum albumin (BSA) were obtained via a surface-imprinting technique. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), fourier transform infrared spectrometry (FT-IR), thermal gravimetric analysis (TGA), and specific surface area (BET), were adopted to demonstrate that novel PMMIPs were successfully synthesized. Subsequently, the prepared PMMIPs were used as the extractor for BSA and were combined with magnetic solid-phase extraction. The concentrations of BSA were detected by UV-vis spectrophotometry at 278 nm. The maximum adsorption capacity of the PMMIPs was 258 mg g−1, which is much higher than that of non-imprinted polymer (PMNIPs). PMMIPs showed favorable selectivity for BSA against reference proteins, i.e., bovine hemoglobin, ovalbumin and lysozyme. PMMIPs were further used to recognize BSA in protein mixtures, milk, urine and sewage, these results revealed that approximately 96% of the ideal-state adsorption capacity of PMMIPs for BSA was achieved under complicated conditions. Regeneration and reusability studies demonstrated that adsorption capacity loss of the PMMIPs was not obvious after recycling for four times. Facile synthesis, excellent adsorption property and efficient selectivity for BSA trapping are features that highlight PMMIPs as an attractive candidate for biomacromolecular purification.Keywords:molecularly imprinted polymer;magnetic separation;bovine serum albumin;core-shell structure;specific adsorption
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PubMed
高影响因子
Advanced Optical Materials
·
2018
·Vol. 7
·期 4
·1801323
·
IF 7.43
Jiarui Hao,Xingyu Qu,Lei Qiu,Guogang Li,Yi Wei,Gongcheng Xing,Hongquan Wang,Chunjie Yan,Ho Seong Jang,Ziyong Cheng,Jun Lin
Currently, poor luminescence stability seriously impedes the practical application of inorganic halide perovskite (CsPbX 3 , X = Cl, Br, and I) quantum dots (QDs) in optoelectronic devices. In present work, CsPbX 3 QDs are successfully assembled on natural mineral halloysite nanotubes (HNTs) for improving the luminescence performances. Monodispersed CsPbX 3 QDs are arranged on two edges of HNTs in a highly ordered manner, which possibly originates from the electrostatic interaction between halogen ion and surface hydroxyl (Sur OH 2 + ) on the section face of HNTs. As expected, the photoluminescence (PL) performances of CsPbX 3 @HNTs nanocomposites are obviously improved. The PL intensity still can be maintained even 80% when working at 100 °C. Almost no emission degradation is observed after storing in an open ambient condition for 28 days. Moreover, the PL intensity also maintains 82% of room temperature (RT) intensity after continuously being illuminated by 365 nm UV lamps for 144 h. Excellent white light with Commission Internationale de l'Eclairage (CIE) chromaticity coordinates (0.34, 0.32) of the white light-emitting diodes (w-LEDs) fabricated by CsPbBr 3 @HNTs, CsPbBr 1.2 Cl 1.8 @HNTs, and CsPbBr 1.2 I 1.8 @HNTs phosphors are achieved. This work opens up a new insight in achieving stable CsPbX 3 QD-based multifunctional materials by designing nanocomposites with natural clay mineral.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Zheng Zhong,Aixun Ju,Quanming Li,Yanli Dou
At present, designing efficient bio-based flame retardants for epoxy resin (EP) and exploring low-toxicity and sustainable flame retardant strategies is still a great challenge. In this work, a novel bio-based hybrid flame retardant was successfully prepared by constructing a resveratrol-based cyclic cross-linked polyphosphazene (PPZ) shell on the surface of halloysite nanotube (HNT). The enhancement effects of HNT@PPZ on the fire safety of EP composites were investigated by thermal degradation, simulated fire performance (cone calorimeter test), gas-phase product analysis, and condensed-phase char residue analysis. Compared to pure EP, he total heat release (THR), total smoke production (TSP) and the average yield of carbon monoxide (Av-COY) of EP/3HNT@PPZ were reduced by 47.8 %, 46.5 % and 48.8 % respectively. Furthermore, the EP composites containing HNT@PPZ had a stable flame retardancy even after 6 months of natural aging. It was found the barrier effect of HNT@PPZ in condensed phase was further strengthened by the formation of new product aluminum phosphate, which formed a multiple protective char layer. Additionally, PPZ shell improved compatibility and dispersion of HNT in EP matrix, the mechanical properties of the composite with HNT@PPZ were improved significantly. This work proposed a feasible solution for the preparation of highly efficient bio-based flame retardants with excellent heat reduction and smoke toxicity reduction ability, which could be expected to broaden the application of biomass resources in the development of highly efficient flame retardants.
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Chunlin Chen,Guoqing Xiao,Yi He,Fei Zhong,Hongjie Li,Youqing Wu,Jingyu Chen
Bio-inspired dopamine have attracted immense scientific interest in the surface modification field due to the high bio-adhesive properties for varies substrate. Herein, the polydopamine (PDA) was used as a novel pH-response gatekeeper to be coated on the BTA-loaded HNTs hybrids (PBH) via conventional polymerization reaction (Tris HCl/pH=8.5), which can be destroyed in an acidic environment resulting in release of BTA. Further, the as prepared PBH were self-assembled with graphene oxide (GO) through π-π* interaction between GO and PDA. The waterborne epoxy coating (WEC) loaded with GO@PBH possessed superior barrier properties owing to the excellent shielding performance of GO nanosheets against the corrosive ions. The dual self-healing effect of GO@PBH based WEC for the carbon steel substrate mainly originated from release of BTA during corrosion process and the formation of complex between catechol of the damaged PDA polymer network and Fe 3+ . The barrier and self-healing properties of the composite coating were tested by electrochemistry and neutral salt spray test. The results prove that the WEC loaded with GO@PBH hybrids possesses superior barrier properties for the corrosion medium and outstanding self-healing effect as the corrosive ions reached the metal/coating interface.
研究领域:
材料科学
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表面化学
·
腐蚀与防护
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高影响因子
JOURNAL OF CHROMATOGRAPHIC SCIENCE
·
2020
·Vol. 59
·期 7
·681-695
·
IF 1.28
Fizir Meriem,Dahiru Nasiru Sintali,Cui Yanru,Zhi Hao,Dramou Pierre,He Hua
Molecular imprinted polymers coated magnetic halloysite nanotubes (MHNTs-MIPs) were prepared through sol-gel method by using quercetin (Que), APTES and TEOS as template, monomer and cross-linker agent, respectively. The synthesized MHNTs-MIPs were characterized by fourier transform infrared, scanning electron microscope, transmission electron microscope, XRD and vibrating sample magnetometer. Various parameters influencing the binding capacity of the MHNTs-MIPs were investigated with the help of response surface methodology. Selectivity experiments showed that the MHNTs-MIPs exhibited the maximum selective rebinding to Que. Therefore, the MHNTs-MIPs was applied as a solid-phase extraction adsorbent for the extraction and preconcentration of quercetin and luteolin in serum and urine samples. The limits of detection for quercetin and luteolin range from 0.51 to 1.32 ng mL−1 in serum and from 0.23 to 1.05 ng mL−1 in urine, the recoveries are between 95.20 and 103.73% with the RSD less than 5.77%. While the recovery hardly decreased after several cycles. The designed MHNTs-MIP with high affinity, sensitivity and maximum selectivity toward Que in SPE might recommend a novel method for the extraction of flavonoids in other samples like natural products.
研究领域:
分析化学
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材料科学
·
生物医学
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Weiquan Yuan,Jingzhong Kuang,Haixiang Hu,Dan Ding,Mingming Yu
The removal of impurity Al(III) from rare earth ion solution by selective adsorption method was one of the challenging tasks. Herein, calcination and acid dissolution treatment were used to construct the pore structure for the halloysite substrate (Hal-650-H) and provide conditions for the formation of the chitosan mesoporous membrane to prepare composite (Hal-H-2CS). The selective adsorption properties and mechanism of the Hal-H-2CS for Al(III) in the rare earth ion solution were studied. The results showed that the formation of mesoporous structures for chitosan provided abundant sites for the adsorption of Al(III). Hal-H-2CS showed remarkable selective adsorption properties for Al(III) in a wide pH range and the binary mixtures with high content of Al(III) or La(III). The maximum adsorption capacity of Al(III) was 106 mg/g, while the adsorption capacity of La(III) was only 1.41 mg/g at pH 4.0. In addition, the Hal-H-2CS exhibited excellent regeneration and structural stability. The remarkable selective properties of Hal-H-2CS was achieved by the synergistic effect between chitosan mesoporous membrane and Hal-650-H, the main adsorption sites were the OH, NH 2 , CONH 2 of chitosan and the oxygen sites of the Hal-650-H. This work provides a new strategy for the design and preparation of outstanding selective adsorbent for Al(III).
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shuangqing Li,Ning Zhang,Heqiu Chen,Zongrui Zhang,Yafei Zhao,Yinze Yang,Huishan Shang,Dan Wang,Bing Zhang
Exploiting inexpensive composite phase change materials (PCMs) with comprehensive characteristics of high encapsulation efficiency, good leakage resistance, strong flexibility, high heat conductivity, and powerful light absorption is considerably imperative for their solar-thermal and solar-thermal-electric conversion. Herein, polypyrrole (PPy) modified halloysite (HNT/PPy) was assembled into the pores of melamine formaldehyde (MF) sponge to construct hierarchical porous structure (MHP), in which PPy serves as light absorber and heat conducting agent to consolidate the light absorption and thermal conductivity, while the interwoven HNT in MF not only acts as carrier to provide sufficient space for guaranteeing more PCMs’ encapsulation, but also dramatically narrows MF’s pore size and prevents PCMs’ leakage. As expected, the MHP can encapsulate as high as 95 wt% of polyethylene glycol (PEG) with extremely high latent heat of 177.8 J g −1 (PEG@MHP). The rich hydroxyl groups on PEG, PVA and HNT form strong hydrogen bond interaction, effectively improving the leakage-proof performance of PEG@MHP. Especially, PEG@MHP with 82 wt% encapsulation ratio (PEG@MHP-82) demonstrates unexceptionable leakage resistance (negligible leakage at 100 °C), strong light absorption (97 %), good photothermal conversion efficiency (90.36 %), and high thermal conductivity (0.235 W m −1 K −1 ). Except that, the solar-thermal-electric (STE) conversion system assembled with PEG@MHP-82 enables efficient voltage and current outputs of 587 mV and 83.3 mA respectively under 3 kW m −2 with heat dissipation in water. Encouragingly, the voltage output still achieves 154.7 mV under actual outdoor illumination (0.984 kW m −2 ). This work provides a simple method to efficiently encapsulate PCMs for realizing high-efficiency solar-thermal and solar-thermal-electric conversion.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shuangqing Li,Xueke Jiao,Lili Chai,Zihan Su,Yushun Yang,Yafei Zhao,Yinze Yang,Dan Wang,Huishan Shang,Bing Zhang
Developing highly effective phase change composites (PCMs) featuring remarkable encapsulation, energy storage, conversion and management performance is of important significance for the practical utilization of organic solid-liquid PCMs. Herein, a secondary hierarchical structure (NSH) was constructed in nickel foam (NF) with silica fiber as scaffold for supporting halloysite (HNT) with polypyrrole (PPy) modification (HNT/PPy). The introduced HNT/PPy can narrow the pore size, intensify the optical absorption, and enhance the thermal and electrical conductivity of NF, while the inserted silica fiber network can prevent HNT/PPy with small particles to drop in the pores of the NF. When polyethylene glycol (PEG) is encapsulated in the NSH, the as-prepared PEG@NSH reveals an ultrahigh encapsulation rate (up to 87 % package), good shape stability (without any leakage at 100 °C with 82 % encapsulation) and excellent solar-thermal conversion capability (93 % of absorption rate, and 95.39 % of photothermal conversion efficiency). Meanwhile, the PEG@NSH also displays a significantly improved thermal conductivity (455 % of pure PEG). Combined the PEG@NSH composite with solar-thermal-electricity (STE) conversion device, efficient and stable voltage output of 907 mV and current output of 139.8 mA can be achieved at 3kW m −2 of light intensity. This work offers a straightforward construction approach for effective package of PCMs and efficient solar-thermal-electric energy conversion and management.
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高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 5
·1-9
·
IF 6.408
Zhang Xinxi,Chen Lulu,Fang Xuejiao,Shang Yunsheng,Gu Haixin,Jia Wenlin,Yang Guohai,Gu Yingqiu,Qu Lulu
Chlorpyrifos is one of the most widely used organophosphate insecticides in agricultural production. Nevertheless, the residues of chlorpyrifos in agricultural by-product seriously threaten human health. Thus, the ultrasensitive detection of chlorpyrifos residues in agri-food products is of great demand. Herein, an AuNP/HNT-assembled disposable paper SERS substrate was prepared by an electrostatic self-assembly method to detect chlorpyrifos residues. The AuNP/HNT paper substrate exhibited high SERS activity, good reproducibility, and long-term stability, which was successfully used for quantitative detection of chlorpyrifos; the detection limit reached 7.9 × 10 −9 M. For spiked apple samples the calculated recovery was 87.9% with a RSD value of 6.1%. The excellent detection ability of AuNP/HNT paper-based SERS substrate indicated that it will play an important role in pesticide detection in the future. Graphical abstract AuNP/HNT assembled disposable paper SERS substrate was prepared by an electrostatic self-assembly method to detect chlorpyrifos residues in fruits.
研究领域:
食品安全
·
分析化学
·
纳米技术
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PubMed
高影响因子
TALANTA
·
2018
·
IF 4.244
Meriem Fizir,Liu Wei,Niu Muchuan,Asma Itatahine,Yamina Ait mehdi,Hua He,Pierre Dramou
This article describes the development, optimization, and evaluation of a novel composite imprinted polymer, on the basis of magnetic halloysite nanotubes (MHNTs-MIPs) using “Quality by Design (QbD)” approach combining computer simulation and response surface methodology. Norfloxacin , methacrylic acid , and ethylene glycol dimethacrylate were used as template, functional monomer and cross-linker, respectively. As a comparison, two MHNTs-MIPs have been prepared with the most suitable functional monomer methacrylic acid (MAA) along with acrylamide (AM). To explain the adsorption behavior , adsorption kinetics and isotherms were studied. Magnetic halloysite nanotubes molecularly imprinted polymers prepared from MAA (MHNTs-MIP 1 ) displayed a high adsorption capacity (349 µg mg −1 ) toward NOR. A magnetic imprinting solid phase extraction method coupled with high performance liquid chromatography (MHNTs-MISPE-HPLC-UV) was developed for the determination of NOR in serum and water samples, by applying MHNTs-MIP as a sorbent . The recoveries from 83.76% to 103.30% in water and from 90.46% to 99.78% in serum were obtained. Besides remarquable mechanical properties and specific recognition of MHNTs-MIP toward template molecule. It could be also collected and separated fastly by external magnetic field . Moreover, MHNTs-MIPs could be reused for several cycles with the recovery range from 83.25% to 100.96% for water sample and from 85.65% to 100.33% for serum sample. These analytical results of serum and water samples showed that the proposed method based on MHNTs-MIPs is applicable for fast and selective extraction of therapeutic agents from biological fluids and environmental water.
研究领域:
分析化学
·
药物分析
·
材料科学
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高影响因子
TALANTA
·
2020
·
IF 5.339
Huadong Zhang,Huasheng Lai,Gongke Li,Yufei Hu
Halloysite nanotubes loaded with 4-aminothiophenol capped silver nanoparticles (mHNTs-AgNPs 4−ATP ) composite was synthesized as a sensitive surface-enhanced Raman scattering (SERS) probe for the determination of nitrite ions in sausage and pork luncheon meat . The as-prepared composite was characterized by transmission electron microscope, X-ray diffraction spectroscopy and Fourier transform infrared spectroscopy . The as-synthesized mHNTs-AgNPs 4−ATP composite with evenly distribution of AgNPs can provide in-situ derivatization site for sensitive and selective SERS detection of nitrite ions. Under acid condition, the 4-ATP capped on the AgNPs can be transformed into p , p ’-dimercaptoazobenzene (DMAB) through nitrite-triggered diazo reaction. This efficient nitrite-triggered reaction can be used to detect nitrite via the characteristic peaks of DMAB at 1143 cm −1 , 1392 cm −1 , and 1434 cm −1 . This SERS method has a wide logarithmic range of 0.0069–6.9 mg L −1 , with detection limit of 0.78, 3.4, 0.51 μg L −1 at the peak of 1143 cm −1 , 1392 cm −1 , and 1434 cm −1 , respectively. Besides, this method can be applied to detect nitrite ions in sausage and pork luncheon meat with relative standard deviation less than 10.3%, and the results were consistent with that analyzed by UV–Vis method. This method has good potential in efficient detection of meat product in food safety.
研究领域:
食品安全
·
分析化学
·
纳米材料
·
光谱学
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DOI
高影响因子
危险品化学品经营许可证（带存储）