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Zhang J, Chen Y, Ni M, Hou C, Qiao X, Wang T. A novel halloysite nanotubes-based hybrid monolith for in-tube solid-phase microextraction of polar cationic pesticides. Food Chem 2024; 458:140205. [PMID: 38943962 DOI: 10.1016/j.foodchem.2024.140205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 06/13/2024] [Accepted: 06/22/2024] [Indexed: 07/01/2024]
Abstract
The accurate determination of polar cationic pesticides in food poses a challenge due to their high polarity and trace levels in complex matrices. This study hypothesized that the use of halloysite nanotubes (HNTs) can significantly enhance the extraction efficiency and sensitivity of these analytes because of their rich hydroxyl groups and cation exchange sites. Therefore, we chemically incorporated HNTs with organic polymer monoliths for in-tube solid-phase microextraction (SPME). This novel hybrid monolith extended service life, improved adsorption capacity, and exhibited excellent extraction performance for polar cationic pesticides. Based on these advancements, a robust and sensitive in-tube SPME-HILIC-MS/MS method was constructed to determine trace levels of polar cationic pesticides in complex food matrices. The method achieved limits of detection of 1.9, 2.1, and 0.1 μg/kg for maleic hydrazide, amitrole, and cyromazine, respectively. The spiked recoveries in five food samples ranged from 80.2 to 100.8%, with relative standard deviations below 10.7%.
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Affiliation(s)
- Jinhan Zhang
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo 315211, PR China
| | - Yihui Chen
- Ningbo Customs Technology Center, Ningbo 315040, PR China.
| | - Meilin Ni
- Ningbo Customs Technology Center, Ningbo 315040, PR China
| | - Chunyan Hou
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Xiaoqiang Qiao
- College of Pharmaceutical Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding 071002, PR China
| | - Tingting Wang
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo 315211, PR China.
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2
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Abotaleb A, Al-Masri D, Alkhateb A, Mroue K, Zekri A, Mashhour Y, Sinopoli A. Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methane. RSC Adv 2024; 14:4788-4803. [PMID: 38318606 PMCID: PMC10840390 DOI: 10.1039/d3ra07990b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 01/19/2024] [Indexed: 02/07/2024] Open
Abstract
Dry reforming of methane (DRM) has recently received wide attention owing to its outstanding performance in the reduction and conversion of CH4 and CO2 to syngas (H2 and CO). From an industrial perspective, nickel (Ni)-supported catalysts have been deemed among the most suitable catalysts for DRM owing to their low cost and high activity compared to noble metals. However, a downside of nickel catalysts is their high susceptibility to deactivation due to coke formation and sintering at high temperatures. Using appropriate supports and preparation methods plays a major role in improving the activity and stability of Ni-supported catalysts. Halloysite nanotubes (HNTs) are largely utilized in catalysis as a support for Ni owing to their abundance, low cost, and ease of preparation. The treatment of HNTs (chemical or physical) prior to doping with Ni is considered a suitable method for increasing the overall performance of the catalyst. In this study, the surface of HNTs was activated with acids (HNO3 and H2SO4) and alkalis (NaOH and Na2CO3 + NaNO3) prior to Ni doping to assess the effects of support treatment on the stability, activity, and longevity of the catalyst. Nickel catalysts on raw HNT, acid-treated HNT, and alkali-treated HNT supports were prepared via wet impregnation. A detailed characterization of the catalysts was conducted using X-ray diffraction (XRD), BET surface area analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), solid-state nuclear magnetic resonance (ssNMR), H2-temperature programmed reduction, (H2-TPR), CO2-temperature programmed desorption (CO2-TPD), and Ni-dispersion via H2-pulse chemisorption. Our results reveal a clear alteration in the structure of HNTs after treatment, while elemental mapping shows a uniform distribution of Ni throughout all the different supports. Moreover, the supports treated with a molten salt method resulted in the overall highest CO2 and CH4 conversion among the studied catalysts and exhibited high stability over 24 hours testing.
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Affiliation(s)
- Ahmed Abotaleb
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
| | - Dema Al-Masri
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
- Earthna Center for a Sustainable Future, Qatar Foundation Doha Qatar
| | - Alaa Alkhateb
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
| | - Kamal Mroue
- HBKU Core Labs, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
| | - Atef Zekri
- HBKU Core Labs, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
| | - Yasmin Mashhour
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University Doha P.O. Box 2713 Qatar
| | - Alessandro Sinopoli
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
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3
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Dadwal A, Prasher M, Sengupta P, Kumar N. Quantifying nematic order in the evaporation-driven self-assembly of halloysite nanotubes: nematic islands and the critical aspect ratio. SOFT MATTER 2023; 19:9050-9058. [PMID: 37975238 DOI: 10.1039/d3sm01224g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Halloysite nanotubes (HNTs) are naturally occurring clay minerals found in the Earth's crust that typically exist in the form of high aspect-ratio nanometer-long rods. Here, we investigate the evaporation-driven self-assembly process of HNTs and show that a highly polydisperse collection of HNTs self-sort into a spatially inhomogeneous structure, displaying a systematic variation in the resulting nematic order. Through detailed quantification using the nematic order parameter S and nematic correlation functions, we show the existence of well-defined isotropic-nematic transitions in the emerging structures. We also show that the onset of these transitions gives rise to the formation of nematic islands, a phase resembling ordered nematic domains surrounded by an isotropic phase, which grow in size with S. Detailed image analysis indicates a strong correlation between local S and the local aspect ratio, L/D, with nematic order possible only for rods with L/D ≥ 6.5 ± 1. Finally, we conclude that the observed phenomena directly result from aspect ratio-based sorting in our system. Altogether, our results provide a unique method of tuning the local microscopic structure in self-assembled HNTs using L/D as an external parameter.
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Affiliation(s)
- Arun Dadwal
- Department of Physics, Indian Institute of Technology Bombay Powai, Mumbai 400076, India.
| | - Meenu Prasher
- Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
| | - Pranesh Sengupta
- Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Nitin Kumar
- Department of Physics, Indian Institute of Technology Bombay Powai, Mumbai 400076, India.
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4
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Zhao Q, Cheng X, Kang J, Kong L, Zhao X, He X, Li J. Polyvinyl alcohol flame retardant film based on halloysite nanotubes, chitosan and phytic acid with strong mechanical and anti-ultraviolet properties. Int J Biol Macromol 2023; 246:125682. [PMID: 37406910 DOI: 10.1016/j.ijbiomac.2023.125682] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 05/10/2023] [Accepted: 07/02/2023] [Indexed: 07/07/2023]
Abstract
The research of additive biomass flame retardants is becoming more and more popular. In this work, amino modified halloysite nanotubes (A-HNTs), chitosan (CS) and phytic acid (PA) were introduced into polyvinyl alcohol (PVA) matrix to construct PA/A-HNT/CS/PVA organic-inorganic composite film with hydrogen bond and covalent bond cross-linking network structure. Adding PA/A-HNT/CS can remarkably improve the mechanical strength, UV resistance and thermal stability of PVA film. Compared with control PVA film, the transmittance of composite film in ultraviolet region decreases from 90 % to <15 %, and the tensile strength raises from 19.8 MPa to 31.0 MPa. The thermal decomposition temperature of the composite film increases, the weight loss rate decreases obviously, and the carbon residue can reach 26 wt% at 700 °C. The limiting oxygen index increases from 18.5 % to 32.2 %. Furthermore, the addition of this flame-retardant system can obviously reduce the combustion intensity of PVA, and its flame-retardant grade can reach V-0. It is of great significance to expand the application of PVA and the development of biomass flame retardant.
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Affiliation(s)
- Qiangli Zhao
- Xi'an Key Laboratory of Textile Composites, School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, Shaanxi, China; China National Textile and Apparel Council Key Laboratory of Flame Retardancy Finishing of Textile Materials, Soochow University, Suzhou 215123, China.
| | - Xiaoyue Cheng
- Xi'an Key Laboratory of Textile Composites, School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, Shaanxi, China
| | - Jiahao Kang
- Xi'an Key Laboratory of Textile Composites, School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, Shaanxi, China
| | - Lingyan Kong
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710129, China
| | - Xiaoliang Zhao
- Xi'an Key Laboratory of Textile Composites, School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, Shaanxi, China
| | - Xinhai He
- Xi'an Key Laboratory of Textile Composites, School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, Shaanxi, China
| | - Jianwei Li
- Xi'an Key Laboratory of Textile Composites, School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, Shaanxi, China; National Advanced Functional Fiber Innovation Center, Suzhou 215000, China.
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5
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Abid M, Ben Haj Amara A, Bechelany M. Halloysite-TiO 2 Nanocomposites for Water Treatment: A Review. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13091578. [PMID: 37177123 PMCID: PMC10181021 DOI: 10.3390/nano13091578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 04/27/2023] [Accepted: 05/02/2023] [Indexed: 05/15/2023]
Abstract
Halloysite nanotubes (HNTs) are clay minerals with a tubular structure that can be used for many different applications in place of carbon nanotubes. Indeed, HNTs display low/non-toxicity, are biocompatible, and can be easily prepared. Moreover, the aluminum and silica groups present on HNTs' inner and outer surfaces facilitate the interaction with various functional agents, such as alkalis, organosilanes, polymers, surfactants, and nanomaterials. This allows the deposition of different materials, for instance, metal and non-metal oxides, on different substrate types. This review article first briefly presents HNTs' general structure and the various applications described in the last 20 years (e.g., drug delivery, medical implants, and energy storage). Then, it discusses in detail HNT applications for water purification (inorganic and organic pollutants). It focuses particularly on HNT-TiO2 composites that are considered very promising photocatalysts due to their high specific surface area and adsorption capacity, large pore volume, good stability, and mechanical features.
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Affiliation(s)
- Mahmoud Abid
- Institut Européen des Membranes, IEM, UMR 5635, University Montpellier, ENSCM, CNRS, 34730 Montpellier, France
- Laboratory of Resources, Materials & Ecosystem (RME), Faculty of Sciences of Bizerte, University of Carthage, Bizerte 7021, Tunisia
| | - Abdesslem Ben Haj Amara
- Laboratory of Resources, Materials & Ecosystem (RME), Faculty of Sciences of Bizerte, University of Carthage, Bizerte 7021, Tunisia
| | - Mikhael Bechelany
- Institut Européen des Membranes, IEM, UMR 5635, University Montpellier, ENSCM, CNRS, 34730 Montpellier, France
- Gulf University for Science and Technology, GUST, West Mishref, Hawalli 32093, Kuwait
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6
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Kumar L, Deshmukh RK, Hakim L, Gaikwad KK. Halloysite Nanotube as a Functional Material for Active Food Packaging Application: A Review. FOOD BIOPROCESS TECH 2023:1-14. [PMID: 37363381 PMCID: PMC10151217 DOI: 10.1007/s11947-023-03092-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 04/07/2023] [Indexed: 06/28/2023]
Abstract
Halloysite nanotubes (HNTs) are naturally occurring nanomaterials with a tubular shape and high aspect ratio, a promising functional additive for active food packaging applications. HNTs have been shown to possess unique properties such as high surface area, thermal stability, and biocompatibility, making them attractive for active food packaging materials. This review summarizes recent research on the use of HNTs as functional additives in active food packaging applications, including antimicrobial packaging, ethylene scavenging packaging, moisture, and gas barrier packaging. The potential benefits and challenges associated with the incorporation of HNTs into food packaging materials are discussed. The various modification methods, such as the physical, chemical, biological, and electrostatic methods, along with their impact on the properties of HNTs, are discussed. The advantages and challenges associated with each modification approach are also evaluated. Overall, the modification of HNTs has opened new possibilities for the development of advanced packaging materials with improved performance for various functional food packaging materials with enhanced properties and extended shelf life.
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Affiliation(s)
- Lokesh Kumar
- Department of Paper Technology, Indian Institute of Technology Roorkee, 247667, Roorkee, Uttarakhand India
| | - Ram Kumar Deshmukh
- Department of Paper Technology, Indian Institute of Technology Roorkee, 247667, Roorkee, Uttarakhand India
| | - Lokman Hakim
- Department of Paper Technology, Indian Institute of Technology Roorkee, 247667, Roorkee, Uttarakhand India
| | - Kirtiraj K. Gaikwad
- Department of Paper Technology, Indian Institute of Technology Roorkee, 247667, Roorkee, Uttarakhand India
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7
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Imshinetskiy I, Kashepa V, Nadaraia K, Mashtalyar D, Suchkov S, Zadorozhny P, Ustinov A, Sinebryukhov S, Gnedenkov S. PEO Coatings Modified with Halloysite Nanotubes: Composition, Properties, and Release Performance. Int J Mol Sci 2022; 24:ijms24010305. [PMID: 36613748 PMCID: PMC9820610 DOI: 10.3390/ijms24010305] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/20/2022] [Accepted: 12/20/2022] [Indexed: 12/28/2022] Open
Abstract
In this work, the properties of the coatings formed on the Mg-Mn-Ce alloy by plasma electrolytic oxidation (PEO) in electrolytes containing halloysite nanotubes (HNTs) were investigated. The incorporation of halloysite nanotubes into the PEO coatings improved their mechanical characteristics, increased thickness, and corrosion resistance. The studied layers reduced corrosion current density by more than two times in comparison with the base PEO layer without HNTs (from 1.1 × 10-7 A/cm2 to 4.9 × 10-8 A/cm2). The presence of halloysite nanotubes and products of their dihydroxylation that were formed under the PEO conditions had a positive impact on the microhardness of the obtained layers (this parameter increased from 4.5 ± 0.4 GPa to 7.3 ± 0.5 GPa). In comparison with the base PEO layer, coatings containing halloysite nanotubes exhibited sustained release and higher adsorption capacity regarding caffeine.
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8
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Nanoarchitectonics of Ag-modified g-C3N4@halloysite nanotubes by a green method for enhanced photocatalytic efficiency. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Zhang Y, Meng R, Zhou J, Liu X, Guo W. Halloysite nanotubes-decorated electrospun biobased polyamide scaffolds for tissue engineering applications. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Zeng S, Hou Z, So C, Wai H, Jang D, Lai W, Sun L, Gao Z. Simultaneously stiffening and toughening epoxy by urea treated hydroxylated halloysite nanotubes. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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11
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Wei Y, Tian Y, Tian X, Fu Z, Zhao L. Induction of Stereocomplex Crystallization in Poly(
l
‐lactide)/Poly(
d
‐lactide) Blends with High Molecular Weight by Halloysite Nanotubes. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202100356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yafei Wei
- School of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
| | - Yang Tian
- School of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
| | - Xiujuan Tian
- School of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
| | - Zhenjiang Fu
- School of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
| | - Lifen Zhao
- School of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
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12
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Yang G, Ma R, Zhang S, Liu Z, Pei D, Jin H, Liu J, Du W. Microwave-assisted in situ ring-opening polymerization of ε-caprolactone in the presence of modified halloysite nanotubes loaded with stannous chloride. RSC Adv 2022; 12:1628-1637. [PMID: 35425179 PMCID: PMC8978901 DOI: 10.1039/d1ra07469e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 12/08/2021] [Indexed: 11/29/2022] Open
Abstract
Polycaprolactone (PCL) has been widely applied for its excellent physicochemical properties, but it also has common problems with biopolymers. It is important to investigate energy-efficient polymerization crafts and composite catalytic systems in the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) to prepare high-performance PCL matrix composites. In this study, a composite catalytic system of modified halloysite nanotubes loaded with stannous chloride (APTES-P-h-HNTs-SnCl2) was successfully synthesized via hydroxylation, calcination, silane coupling agent modification and physical loading. It was used to catalyze the microwave-assisted in situ ROP of ε-CL to synthesize PCL matrix nanocomposites with modified halloysite nanotubes (PCL-HNTs). The structure, morphology, polymerization, thermal properties and electrochemical performance of products were subsequently investigated. The results show that PCL-HNTs have been successfully synthesized with connected petal-like and porous structures. Compared with PCL, the film-forming and thermal properties of PCL-HNTs have been significantly improved. Moreover, PCL-HNTs have a potential application value in the field of solid polymer electrolytes (SPEs). For the composite catalyst, there existed synergetic catalytic effect between the hydroxyl groups and the metal center. All chain growth simultaneously proceeded between the layers or on the surface of HNTs, conducting the in situ ROP.![]()
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Affiliation(s)
- Gang Yang
- Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan 430074 China
| | - Rui Ma
- Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan 430074 China
| | - Shifan Zhang
- Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan 430074 China
| | - Ziying Liu
- Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan 430074 China
| | - Dexuan Pei
- Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan 430074 China
| | - Hongyun Jin
- Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan 430074 China
| | - Jiaqi Liu
- Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan 430074 China
| | - Wenjie Du
- Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan 430074 China
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13
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Environmentally benign and durable superhydrophobic coatings based on short fluorocarbon chain siloxane modified halloysite nanotubes for oil/water separation. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127540] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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14
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Matos YB, Romanus RS, Torquato M, de Souza EH, Villanova RL, Soares M, Viana ER. Silver nanoparticles nucleated in NaOH-treated halloysite: a potential antimicrobial material. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2021; 12:798-807. [PMID: 34395153 PMCID: PMC8353589 DOI: 10.3762/bjnano.12.63] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
Despite all recent advances in medical treatments, infectious diseases remain dangerous. This has led to intensive scientific research on materials with antimicrobial properties. Silver nanoparticles (Ag-NPs) are a well-established solution in this area. The present work studied the nucleation of silver on halloysite substrates modified by chemical treatment with NaOH. The resulting stabilized Ag-NPs were characterized by X-ray diffraction, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The nucleation was characterized by thermogravimetric analysis and differential scanning calorimetry. The antimicrobial properties of the Ag-NPs were investigated against E. coli and S. aureus. The potential of the Ag-NPs for industrial application was tested by dispersing them into low-density polyethylene. The importance of the chemical affinity between matrix and additive was tested through coating the Ag-NPs with dodecanethiol, a non-polar surfactant. The resulting composites were characterized by scanning electron microscopy and in terms of surface antimicrobial activity. The results demonstrate that the Ag-NPs synthesized in this work are indeed antimicrobial, and that it is possible to imbue a polymeric matrix with the antimicrobial properties of Ag-NPs.
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Affiliation(s)
- Yuri B Matos
- Departamento Acadêmico de Física (DAFIS-CT), Universidade Tecnológica Federal do Paraná - UTFPR - Curitiba, Brazil
| | - Rodrigo S Romanus
- Departamento Acadêmico de Engenharia Mecânica DAMEC, Universidade Tecnológica Federal do Paraná - UTFPR - Curitiba, Brazil
| | - Mattheus Torquato
- Secção de Engenharia e Ciência dos Materiais, Instituto Militar de Engenharia - IME - Rio de Janeiro, Brazil
| | - Edgar H de Souza
- Departamento Acadêmico de Física (DAFIS-CT), Universidade Tecnológica Federal do Paraná - UTFPR - Curitiba, Brazil
| | - Rodrigo L Villanova
- Departamento Acadêmico de Engenharia Mecânica DAMEC, Universidade Tecnológica Federal do Paraná - UTFPR - Curitiba, Brazil
| | - Marlene Soares
- Departamento Acadêmico de Química e Biologia (DAQBI-CT), Universidade Tecnológica Federal do Paraná - UTFPR - Curitiba, Brazil
| | - Emilson R Viana
- Departamento Acadêmico de Física (DAFIS-CT), Universidade Tecnológica Federal do Paraná - UTFPR - Curitiba, Brazil
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15
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Liu J, Chavez SE, Ding H, Farooqui MM, Hou Z, Lin S, D'Auria TD, Kennedy JM, LaChance AM, Sun L. Ultra-transparent nanostructured coatings via flow-induced one-step coassembly. NANO MATERIALS SCIENCE 2021. [DOI: 10.1016/j.nanoms.2021.07.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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16
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Ghalei S, Hopkins S, Douglass M, Garren M, Mondal A, Handa H. Nitric oxide releasing halloysite nanotubes for biomedical applications. J Colloid Interface Sci 2021; 590:277-289. [PMID: 33548611 PMCID: PMC7933102 DOI: 10.1016/j.jcis.2021.01.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 12/28/2020] [Accepted: 01/16/2021] [Indexed: 11/18/2022]
Abstract
Halloysite nanotubes (HNTs) are natural aluminosilicate clay that have been extensivelyexplored fordelivery of bioactive agents in biomedical applications because of their desirable features including unique hollow tubular structure, good biocompatibility, high mechanical strength, and extensive functionality. For the first time, in this work, functionalized HNTs are developed as a delivery platform for nitric oxide (NO), a gaseous molecule, known for its important roles in the regulation of various physiological processes. HNTs were first hydroxylated and modified with an aminosilane crosslinker, (3-aminopropyl) trimethoxysilane (APTMS), to enable the covalent attachment of a NO donor precursor, N-acetyl-d-penicillamine (NAP). HNT-NAP particles were then converted to NO-releasing S-nitroso-N-acetyl-penicillamine HNT-SNAP by nitrosation. The total NO loading on the resulting nanotubes was 0.10 ± 0.07 μmol/mg which could be released using different stimuli such as heat and light. Qualitative (Fourier-transform infrared spectroscopy and Nuclear magnetic resonance) and quantitative (Ninhydrin and Ellman) analyses were performed to confirm successful functionalization of HNTs at each step. Field emission scanning electron microscopy (FE-SEM) showed that the hollow tubular morphology of the HNTs was preserved after modification. HNT-SNAP showed concentration-dependent antibacterial effects against Gram-positive Staphylococcus aureus (S. aureus), resulting in up to 99.6% killing efficiency at a concentration of 10 mg/mL as compared to the control. Moreover, no significant cytotoxicity toward 3T3 mouse fibroblast cells was observed at concentrations equal or below 2 mg/mL of HNT-SNAP according to a WST-8-based cytotoxicity assay. The SNAP-functionalized HNTs represent a novel and efficient NO delivery system that holds the potential to be used, either alone or in combination with polymers for different biomedical applications.
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Affiliation(s)
- Sama Ghalei
- School of Chemical, Materials and Biomedical Engineering, University of Georgia, Athens 30602, United States
| | - Sean Hopkins
- School of Chemical, Materials and Biomedical Engineering, University of Georgia, Athens 30602, United States
| | - Megan Douglass
- School of Chemical, Materials and Biomedical Engineering, University of Georgia, Athens 30602, United States
| | - Mark Garren
- School of Chemical, Materials and Biomedical Engineering, University of Georgia, Athens 30602, United States
| | - Arnab Mondal
- School of Chemical, Materials and Biomedical Engineering, University of Georgia, Athens 30602, United States
| | - Hitesh Handa
- School of Chemical, Materials and Biomedical Engineering, University of Georgia, Athens 30602, United States.
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17
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Immobilization of β-galactosidase by halloysite-adsorption and entrapment in a cellulose nanocrystals matrix. Biochim Biophys Acta Gen Subj 2021; 1865:129896. [PMID: 33774147 DOI: 10.1016/j.bbagen.2021.129896] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 03/01/2021] [Accepted: 03/22/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Immobilization allows easy recovery and reuse of enzymes in industrial processes. In addition, it may enhance enzyme stability, allowing prolonged use. A simple and novel method of immobilizing β-galactosidase is reported. Effects of immobilization on the enzyme characteristics are explained. β-Galactosidase is well established in dairy processing and has emerging applications in novel syntheses. METHODS β-Galactosidase was immobilized by physical adsorption on halloysite, an aluminosilicate nanomaterial. Optimal conditions for adsorption were identified. The optimally prepared halloysite-adsorbed enzyme was then entrapped in a porous matrix of nanocrystals of sulfated bacterial cellulose, to further enhance stability. RESULTS Under optimal conditions, 89.5% of the available protein was adsorbed per mg of halloysite. The most active and stable final immobilized biocatalyst had 1 part by mass of the enzyme-supporting halloysite particles mixed with 2 parts of cellulose nanocrystals. Immobilization raised the optimal pH of the catalyst to 7.5 (from 6.0 for the native enzyme) and temperature to 55 °C (40 °C for the native enzyme). During storage at 25 °C, the immobilized enzyme retained 75.8% of initial activity after 60 days compared to 29.2% retained by the free enzyme. CONCLUSION The immobilization method developed in this work enhanced enzyme stability during catalysis and storage. Up to 12 cycles of repeated use of the catalyst became feasible. GENERAL SIGNIFICANCE The simple and rapid immobilization strategy of this work is broadly applicable to enzymes used in diverse bioconversions.
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Zhang S, Liu Q, Yang Y, Zhang H, Liu J, Zeng S, LaChance AM, Barrett AT, Sun L. An efficient method to prepare aluminosilicate nanoscrolls under mild conditions. Chem Commun (Camb) 2021; 57:789-792. [PMID: 33355554 DOI: 10.1039/d0cc07291e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The conventional approach to exfoliate kaolinite to form aluminosilicate nanoscrolls is very time-consuming. Herein, we report a novel method to prepare aluminosilicate nanoscrolls from kaolinite by catalysis of AlCl3 under mild conditions. This method is highly efficient, environmentally friendly, and can be easily scaled up for mass production.
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Affiliation(s)
- Shilong Zhang
- School of Physics and Electronics, Qiannan Normal University for Nationalities, Duyun, Guizhou 558000, China and School of Geosciences & Surveying Engineering, China University of Mining and Technology, Beijing 100083, China. and Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA.
| | - Qinfu Liu
- School of Geosciences & Surveying Engineering, China University of Mining and Technology, Beijing 100083, China.
| | - Yongjie Yang
- School of Geosciences & Surveying Engineering, China University of Mining and Technology, Beijing 100083, China.
| | - Hao Zhang
- School of Geosciences & Surveying Engineering, China University of Mining and Technology, Beijing 100083, China.
| | - Jingjing Liu
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA. and Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Songshan Zeng
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA. and Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Anna Marie LaChance
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA. and Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Allyson T Barrett
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA. and Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Luyi Sun
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA. and Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
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Khan A, Hassanein A, Habib S, Nawaz M, Shakoor RA, Kahraman R. Hybrid Halloysite Nanotubes as Smart Carriers for Corrosion Protection. ACS APPLIED MATERIALS & INTERFACES 2020; 12:37571-37584. [PMID: 32686396 DOI: 10.1021/acsami.0c08953] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Novel hybrid halloysite nanotubes (HHNTs) were developed and used as smart carriers for corrosion protection of steel. For this purpose, as-received halloysite nanotubes (HNTs) were loaded with a corrosion inhibitor, imidazole (IM), by vacuum encapsulation. In the next step, a layer by layer technique was employed to intercalate another inhibitor, dodecylamine (DDA), in the polyelectrolyte multilayers of polyethylenimine and sulfonated polyether ether ketone, leading to the formation of HHNTs. During this process, IM (5 wt %) was successfully encapsulated into the lumen of HNTs, while DDA (0.4 wt %) was effectively intercalated into the polyelectrolyte layers. Later, the HHNTs (3 wt %) were thoroughly dispersed into the epoxy matrix to develop smart hybrid self-healing polymeric coatings designated as hybrid coatings. For a precise evaluation, epoxy coatings containing as-received HNTs (3 wt %) without any loading denoted to as reference coatings and modified coatings containing HNTs loaded with IM-loaded HNTs (3 wt %) were also developed. A comparative analysis elucidates that the hybrid coatings demonstrate decent thermal stability, improved mechanical properties, and promising anticorrosion properties compared to the reference and modified coatings. The calculated corrosion inhibition efficiencies of the modified and hybrid coatings are 92 and 99.8%, respectively, when compared to the reference coatings. Noticeably, the superior anticorrosion properties of hybrid coatings can be attributed to the synergetic effect of both the inhibitors loaded into HHNTs and their efficient release in response to the localized pH change of the corrosive medium. Moreover, IM shows an active release in both acidic and basic media, which makes it suitable for the protection of steel at the early stages of damage, while DDA being efficiently released in the acidic medium may contribute to impeding the corrosion activity at the later stages of deterioration. The tempting properties of hybrid coatings demonstrate the beneficial role of the development of novel HHNTs and their use as smart carriers in the polymeric matrix for corrosion protection of steel.
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Affiliation(s)
- Adnan Khan
- Center for Advanced Materials (CAM), Qatar University, 2713 Doha, Qatar
| | - Amani Hassanein
- Center for Advanced Materials (CAM), Qatar University, 2713 Doha, Qatar
| | - Sehrish Habib
- Center for Advanced Materials (CAM), Qatar University, 2713 Doha, Qatar
| | - Muddasir Nawaz
- Center for Advanced Materials (CAM), Qatar University, 2713 Doha, Qatar
| | - R A Shakoor
- Center for Advanced Materials (CAM), Qatar University, 2713 Doha, Qatar
| | - Ramazan Kahraman
- Department of Chemical Engineering, Qatar University, 2713 Doha, Qatar
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20
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Tas C, Sevinis Ozbulut EB, Ceven OF, Tas BA, Unal S, Unal H. Purification and Sorting of Halloysite Nanotubes into Homogeneous, Agglomeration-Free Fractions by Polydopamine Functionalization. ACS OMEGA 2020; 5:17962-17972. [PMID: 32743169 PMCID: PMC7391362 DOI: 10.1021/acsomega.0c01057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
Halloysite nanotubes (HNTs) have attracted great attention in the field of nanotechnology as natural, high value-added nanomaterials. Despite their significant potential as carriers of active agents and fillers in nanocomposite structures, inhomogeneity of HNTs in terms of length and diameter along with their agglomeration tendency poses important obstacles for the utilization of them in a wider range of applications. Here, a facile, three-step separation protocol that allows the sorting of HNTs into agglomeration-free, uniform size fractions is reported. The protocol consists of coating of HNTs with polydopamine to impart hydrophilicity and aqueous dispersibility, followed by their ultrasonication and centrifugation at varying velocities for size-based separation. Particle size distribution analysis by scanning electron microscopy and dynamic light scattering has demonstrated that the separation protocol resulted in uniform HNT fractions of varying agglomeration states and particle sizes. The highest quality fraction obtained with 18% yield was free of agglomerations and consisted of HNTs of uniform lengths and diameters. The polydopamine coating on HNTs which facilitated the separation was demonstrated to be removed by a simple heat treatment that preserved the crystal structure of HNTs. The impact of the separation protocol on the loading and functionalization capacity of halloysites was investigated. Highest quality HNTs presented 4.1-fold increase in lumen loading and 1.9-fold increase in covalent surface coupling ratios compared to the loading and functionalization ratios obtained with raw HNTs. Similarly, sorted, high-quality HNTs were demonstrated to be better dispersed in a polymeric matrix, resulting in polymeric nanocomposites with significantly enhanced mechanical properties compared to nanocomposites prepared with raw HNTs. The three-step separation protocol presented here provides a toolbox that allows sorting of raw HNTs into uniform fractions of different size ranges, from which HNTs of desired qualities required by different applications can be selected.
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Affiliation(s)
- Cuneyt
Erdinc Tas
- Faculty
of Engineering and Natural Sciences, Sabanci
University, 34956 Istanbul, Turkey
- Sabanci
University SUNUM Nanotechnology Research Center, 34956 Istanbul, Turkey
| | | | - Omer Faruk Ceven
- Faculty
of Technology, Marmara University, 34722 Istanbul, Turkey
| | - Buket Alkan Tas
- Faculty
of Engineering and Natural Sciences, Sabanci
University, 34956 Istanbul, Turkey
- Sabanci
University SUNUM Nanotechnology Research Center, 34956 Istanbul, Turkey
| | - Serkan Unal
- Faculty
of Engineering and Natural Sciences, Sabanci
University, 34956 Istanbul, Turkey
- Integrated
Manufacturing Technologies Research and Application Center, Sabanci University, 34906 Istanbul, Turkey
| | - Hayriye Unal
- Sabanci
University SUNUM Nanotechnology Research Center, 34956 Istanbul, Turkey
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21
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In-situ polymerised PLA-SEP bionanocomposites: effect of silanol groups on the properties of PLA. JOURNAL OF POLYMER RESEARCH 2020. [DOI: 10.1007/s10965-020-02098-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Kim C, Suhito IR, Angeline N, Han Y, Son H, Luo Z, Kim T. Vertically Coated Graphene Oxide Micro-Well Arrays for Highly Efficient Cancer Spheroid Formation and Drug Screening. Adv Healthc Mater 2020; 9:e1901751. [PMID: 32134570 DOI: 10.1002/adhm.201901751] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 02/21/2020] [Accepted: 02/26/2020] [Indexed: 12/24/2022]
Abstract
Research on the 3D culturing of cancer cells that better mimic in vivo solid tumors is important for efficient drug screening. Herein, a new platform that effectively facilitates the formation of cancer spheroids for anticancer drug screening is reported. Cytophilic graphene oxide (GO), when selectively coated on the sidewalls of micro-wells fabricated from a cell-adhesion-resistive polymer, is found to efficiently initiates distinct donut-like formation of cancer cell spheroids. Scanning electron microscopy and Raman mapping are used to analyze vertically coated GO micropatterns (vGO-MPs) of different sizes (100-250 µm) on polymer platforms, and human liver cancer cells (HepG2), as a model cancer, are seeded on these platforms. Remarkably, the 150 µm-sized platform is found to easily and rapidly generate 3D spheroids in the absence of cell-adhesion proteins. In addition, owing to the unique characteristics of GO, vGO-MPs are highly stable for long periods of time (≈1 month), even under harsh conditions (>70 °C). Moreover, the anticancer effects of two drugs (hydroxyurea and cisplatin) and the potential anticancer compound (curcumin) on HepG2 cells are demonstrated by simply measuring decreases in spheroid sizes. Hence, this new platform is highly promising as a cancer spheroid-forming material for rapid drug screening.
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Affiliation(s)
- Cheol‐Hwi Kim
- School of Integrative EngineeringChung‐Ang University Seoul 06974 Republic of Korea
| | | | - Novi Angeline
- School of Integrative EngineeringChung‐Ang University Seoul 06974 Republic of Korea
| | - Yoojoong Han
- School of Integrative EngineeringChung‐Ang University Seoul 06974 Republic of Korea
| | - Hyungbin Son
- School of Integrative EngineeringChung‐Ang University Seoul 06974 Republic of Korea
| | - Zhengtang Luo
- Department of Chemical and Biological EngineeringHong Kong University of Science and Technology Kowloon Hong Kong 999077 China
| | - Tae‐Hyung Kim
- School of Integrative EngineeringChung‐Ang University Seoul 06974 Republic of Korea
- Integrative Research Center for Two‐Dimensional Functional MaterialsInstitute of Interdisciplinary Convergence ResearchChung‐Ang University Seoul 06974 Republic of Korea
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23
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Hou B, Wu J. Halloysite nanotubes (HNTs)@ZIF-67 composites—a new type of heterogeneous catalyst for the Knoevenagel condensation reaction. Dalton Trans 2020; 49:17621-17628. [DOI: 10.1039/d0dt03345f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Halloysite nanotubes (HNTs) are encapsulated in 50 nm thick shells of ZIF-67, producing novel nano-sized composites HNTs@ZIF-67.
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Affiliation(s)
- Buwei Hou
- Department of Chemistry
- College of Arts and Sciences
- Case Western Reserve University
- Cleveland
- USA
| | - Jie Wu
- Green Catalysis Center and College of Chemistry
- Zhengzhou University
- P. R. China
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24
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Saadat S, Pandey G, Tharmavaram M, Braganza V, Rawtani D. Nano-interfacial decoration of Halloysite Nanotubes for the development of antimicrobial nanocomposites. Adv Colloid Interface Sci 2020; 275:102063. [PMID: 31739982 DOI: 10.1016/j.cis.2019.102063] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 10/23/2019] [Accepted: 11/04/2019] [Indexed: 01/16/2023]
Abstract
In recent times, incorporation of Halloysite Nanotubes (HNTs) with various antimicrobial agents as interfacial materials between these nanotubes and pathogenic microorganisms, for the development of antimicrobial nanocomposites with enhanced antimicrobial activities has gained researcher's interest. The main benefits given by HNT to these nanocomposites include enhanced thermal and mechanical stability of the antimicrobial nanocomposites and also prolong durability and release of the antimicrobial agents in a sustained manner. The exceptional structure of these aluminosilicate minerals based nanotubes (hollow tubular lumen with huge surface area) and oppositely charged surface molecules assist in attaching various molecules on both, the internal surface as well as on the outer surface of these nanotubes. Other advantages of these clay-based minerals are their biocompatibility, non-toxicity, eco-friendly nature and their natural availability with affordable price, which also contribute in selecting them as supporting material for biological applications. Therefore, these clay-based nanotubes have been recently used for developing various antimicrobial nanocomposites. In this review, various antimicrobial nanocomposites developed through incorporation of HNT with myriad antimicrobial agents such as nanoparticles, metal ions, antibiotics, essential oils, biopolymers, phenolic compounds, surfactants and food preservatives as an interface between these nanotubes and microorganisms have been discussed. These antimicrobial nanocomposites could be synthesized in different forms (powder, film, nanocapsule and adhesive) which can be applicable in various fields such as food packaging, water decontamination, waste water management, healing of wounds, antimicrobial agents for surfaces, orthopedics and for the treatment of microbial infections.
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25
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Zhao X, Luo Y, Tan P, Liu M, Zhou C. Hydrophobically modified chitin/halloysite nanotubes composite sponges for high efficiency oil-water separation. Int J Biol Macromol 2019; 132:406-415. [DOI: 10.1016/j.ijbiomac.2019.03.219] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 03/27/2019] [Accepted: 03/28/2019] [Indexed: 10/27/2022]
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26
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Rouster P, Dondelinger M, Galleni M, Nysten B, Jonas AM, Glinel K. Layer-by-layer assembly of enzyme-loaded halloysite nanotubes for the fabrication of highly active coatings. Colloids Surf B Biointerfaces 2019; 178:508-514. [DOI: 10.1016/j.colsurfb.2019.03.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 02/18/2019] [Accepted: 03/20/2019] [Indexed: 12/19/2022]
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27
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Goda ES, Gab-Allah M, Singu BS, Yoon KR. Halloysite nanotubes based electrochemical sensors: A review. Microchem J 2019. [DOI: 10.1016/j.microc.2019.04.011] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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28
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Sánchez M, Uicich JF, Arenas GF, Rodríguez ES, Montemartini PE, Penoff ME. Chemical reactions affecting halloysite dispersion in epoxy nanocomposites. J Appl Polym Sci 2019. [DOI: 10.1002/app.47979] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Manuel Sánchez
- National Interuniversity Council 871 Ecuador Street, C1214ACM Buenos Aires Argentina
- Structural Composite Group (CET)Materials Science and Technology Research Institute (INTEMA) –Technical and Scientific National Research Council (CONICET) and National University of Mar del Plata (UNMdP) 7575 Solís Street, 7600 Mar del Plata Argentina
| | - Julieta Fabienne Uicich
- Structural Composite Group (CET)Materials Science and Technology Research Institute (INTEMA) –Technical and Scientific National Research Council (CONICET) and National University of Mar del Plata (UNMdP) 7575 Solís Street, 7600 Mar del Plata Argentina
| | - Gustavo Francisco Arenas
- Laser Laboratory, Scientific and Technologic Research Institute in Electronics (ICyTE), Faculty of EngineeringNational University of Mar del Plata & CONICET 4302 Juan B. Justo Street, 7600 Mar del Plata Argentina
| | - Exequiel Santos Rodríguez
- Structural Composite Group (CET)Materials Science and Technology Research Institute (INTEMA) –Technical and Scientific National Research Council (CONICET) and National University of Mar del Plata (UNMdP) 7575 Solís Street, 7600 Mar del Plata Argentina
| | - Pablo Ezequiel Montemartini
- Structural Composite Group (CET)Materials Science and Technology Research Institute (INTEMA) –Technical and Scientific National Research Council (CONICET) and National University of Mar del Plata (UNMdP) 7575 Solís Street, 7600 Mar del Plata Argentina
| | - Marcela Elisabeth Penoff
- Structural Composite Group (CET)Materials Science and Technology Research Institute (INTEMA) –Technical and Scientific National Research Council (CONICET) and National University of Mar del Plata (UNMdP) 7575 Solís Street, 7600 Mar del Plata Argentina
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29
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The role of halloy site on crystallinity, ion conductivity, thermal and mechanical properties of poly(ethylene-oxide)/halloysite nanocomposites. JOURNAL OF POLYMER RESEARCH 2019. [DOI: 10.1007/s10965-019-1803-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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30
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Kong M, Liu C, Tang B, Xu W, Huang Y, Li G. Improved Mechanical and Thermal Properties of Trifunctional Epoxy Resins through Controlling Molecular Networks by Ionic Liquids. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00547] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Miqiu Kong
- School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, PRC
| | - Chengjun Liu
- School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, PRC
| | - Bing Tang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu 610065, PRC
| | - Wenqing Xu
- School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, PRC
| | - Yajiang Huang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu 610065, PRC
| | - Guangxian Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu 610065, PRC
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31
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Fu Y, Luo J, Qin J, Yang M. Screening techniques for the identification of bioactive compounds in natural products. J Pharm Biomed Anal 2019; 168:189-200. [PMID: 30825802 DOI: 10.1016/j.jpba.2019.02.027] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 02/14/2019] [Accepted: 02/18/2019] [Indexed: 01/06/2023]
Abstract
Natural products (NPs) have a long history of clinical use and are rich source of bioactive compounds. The development of tools and techniques for identifying and analyzing NP bioactive compounds to ensure their quality and discover new drugs is thus very important and still in demand. Screening techniques have proven highly useful for screening and analyzing active components in complex mixtures, which rely on cell culture, dialysis, ultrafiltration, chromatographic methods and target molecule immobilization, using biological targets to identify the active compounds. The recent progress in biological screening techniques in the field of natural products is reviewed here. This includes a review on the strategy and application of the screening methods, their detailed description and discussion of their existing limitations of the different models along with prospective in future development of screening techniques.
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Affiliation(s)
- Yanwei Fu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100193, China
| | - Jiaoyang Luo
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100193, China
| | - Jiaan Qin
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100193, China
| | - Meihua Yang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100193, China.
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32
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Taherian S, Rahmani S, Sharif A, Zeinolebadi A, Abdollahi M. In-situ polymerization of aliphatic-aromatic polyamide nanocomposites in the presence of Halloysite nanotubes. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4489] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sara Taherian
- Department of Polymer Reaction Engineering, Faculty of Chemical Engineering; Tarbiat Modares University; 14155/143 Tehran Iran
| | - Sima Rahmani
- Department of Polymer Reaction Engineering, Faculty of Chemical Engineering; Tarbiat Modares University; 14155/143 Tehran Iran
| | - Alireza Sharif
- Department of Polymer Reaction Engineering, Faculty of Chemical Engineering; Tarbiat Modares University; 14155/143 Tehran Iran
| | | | - Mahdi Abdollahi
- Department of Polymer Reaction Engineering, Faculty of Chemical Engineering; Tarbiat Modares University; 14155/143 Tehran Iran
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33
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Tharmavaram M, Pandey G, Rawtani D. Surface modified halloysite nanotubes: A flexible interface for biological, environmental and catalytic applications. Adv Colloid Interface Sci 2018; 261:82-101. [PMID: 30243667 DOI: 10.1016/j.cis.2018.09.001] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 09/01/2018] [Accepted: 09/02/2018] [Indexed: 02/07/2023]
Abstract
Halloysite Nanotubes (HNTs) are clay minerals that possess unique chemical composition and a tubular structure due to which, they have recently emerged as a potential nanomaterial for umpteen applications. Over the years, the myriad applications of HNT have been realized through the surface modification of HNT, which involves the modification of nanotube's inner lumen and the outer surface with different functional compounds. The presence of aluminum and silica groups on the inner and outer surface of HNT enhance the interfacial relationship of the nanotube with different functional agents. Compounds such as alkalis, organosilanes, polymers, compounds of biological origin, surfactants and nanomaterials have been used for the modification of the inner lumen and the outer surface of HNT. The strategies change the constitution of HNT's surface either through micro-disintegration of the surface or by introducing additional functional groups on the surface, which further enhances their potential to be used as a flexible interface for different applications. In this review, the different surface modification strategies of the outer surface and the inner lumen that have been employed over the years have been discussed. The biological, environmental and catalytic applications of these surface modified HNTs with such versatile interface in the past two years have been elaborately discussed as well.
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Affiliation(s)
- Maithri Tharmavaram
- Institute of Research & Development, Gujarat Forensic Sciences University, Sector 9, Near Police Bhawan, Gandhinagar, Gujarat, India
| | - Gaurav Pandey
- Institute of Research & Development, Gujarat Forensic Sciences University, Sector 9, Near Police Bhawan, Gandhinagar, Gujarat, India
| | - Deepak Rawtani
- Institute of Research & Development, Gujarat Forensic Sciences University, Sector 9, Near Police Bhawan, Gandhinagar, Gujarat, India.
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Kumar A, Kumar K, Ghosh PK, Yadav KL. MWCNT/TiO 2 hybrid nano filler toward high-performance epoxy composite. ULTRASONICS SONOCHEMISTRY 2018; 41:37-46. [PMID: 29137763 DOI: 10.1016/j.ultsonch.2017.09.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 09/05/2017] [Accepted: 09/06/2017] [Indexed: 06/07/2023]
Abstract
In this work, multi-walled carbon nanotubes (MWCNTs) are decorated by TiO2 nanoparticles and formed a new hybrid structure of filler (MWCNT/TiO2 hybrid filler). The MWCNT/TiO2 hybrid filler is reinforced in epoxy matrix and studied the mechanical and anti-corrosion properties of epoxy. The morphology of newly formed MWCNT/TiO2 hybrid nano filler has been studied using transmission electron microscopy (TEM). Field Emission Scanning Electron Microscope (FESEM) images of tensile fracture surface confirmed the superior dispersion of MWCNT/TiO2 in the epoxy matrix. The resultant MWCNT/TiO2 hybrid-epoxy nanocomposite exhibits superior anti-corrosion and mechanical performance than the nanocomposite produced by loading of only MWCNTs or TiO2 nanoparticles as well as neat epoxy. For example, tensile strength and storage modulus of epoxy increased by 61% and 43% respectively on loading of MWCNT/TiO2 hybrid nano filler. Furthermore, the coating of MWCNT/TiO2 hybrid-epoxy nanocomposite on mild steel reduces the corrosion rate upto 0.87×10-3MPY from 16.81MPY.
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Affiliation(s)
- Arun Kumar
- Department of Metallurgical & Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Kaushal Kumar
- Department of Metallurgical & Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - P K Ghosh
- Department of Metallurgical & Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India.
| | - K L Yadav
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India
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35
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Kumar K, Kumar A, Ghosh PK. UDM enhanced physical and mechanical properties through the formation of nanocavities in an epoxy matrix. ULTRASONICS SONOCHEMISTRY 2018; 40:784-790. [PMID: 28946486 DOI: 10.1016/j.ultsonch.2017.08.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 08/17/2017] [Accepted: 08/17/2017] [Indexed: 06/07/2023]
Abstract
The matrix modification of relatively low viscous epoxy based polymer treated under ultrasonic mixing (UM) and ultrasonic mixing with simultaneous stirring by a rotating impeller, referred to as ultrasonic dual mixing (UDM), and the effect of processing techniques has been investigated in terms of the formation of nanocavities in the epoxy matrix. Nanocavities of size 42±8nm have been formed uniformly in the epoxy matrix by UDM. The effect of a change in matrix morphology on the viscoelastic, tensile and thermal properties of the cured epoxy resin has been studied. The UDM processed cured epoxy matrix showed 18.26% and 88.34% improvement in tensile strength and toughness as compared to unprocessed epoxy. Thermal gravimetric analysis (TGA) of UDM processed epoxy showed significant enhancement in the thermal stability of the epoxy matrix.
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Affiliation(s)
- Kaushal Kumar
- Department of Metallurgical & Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India.
| | - Arun Kumar
- Department of Metallurgical & Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - P K Ghosh
- Department of Metallurgical & Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
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36
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Wang C, Zhao M, Li J, Yu J, Sun S, Ge S, Guo X, Xie F, Jiang B, Wujcik EK, Huang Y, Wang N, Guo Z. Silver nanoparticles/graphene oxide decorated carbon fiber synergistic reinforcement in epoxy-based composites. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.10.049] [Citation(s) in RCA: 263] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Yin X, Weng P, Yang S, Han L, Du Z, Wang L, Tan Y. Preparation of viscoelastic gel-like halloysite hybrids and their application in halloysite/polystyrene composites. POLYM INT 2017. [DOI: 10.1002/pi.5383] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Xianze Yin
- College of Materials Science and Engineering; Hubei Key Laboratory of Advanced Textile Materials and Application, Wuhan Textile University; Wuhan PR China
| | - Puxin Weng
- College of Materials Science and Engineering; Hubei Key Laboratory of Advanced Textile Materials and Application, Wuhan Textile University; Wuhan PR China
| | - Shiwen Yang
- College of Materials Science and Engineering; Hubei Key Laboratory of Advanced Textile Materials and Application, Wuhan Textile University; Wuhan PR China
| | - Lu Han
- Department of Macromolecular Science and Engineering; Case Western Reserve University; Cleveland USA
| | - Zhengliang Du
- School of Materials and Chemical Engineering; Ningbo University of Technology; Ningbo PR China
| | - Luoxin Wang
- College of Materials Science and Engineering; Hubei Key Laboratory of Advanced Textile Materials and Application, Wuhan Textile University; Wuhan PR China
| | - Yeqiang Tan
- Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province; Qingdao University; Qingdao PR China
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38
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Chemically modified halloysite nanotubes as a solid–phase microextraction coating. Anal Chim Acta 2017; 964:85-95. [DOI: 10.1016/j.aca.2017.02.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 01/29/2017] [Accepted: 02/02/2017] [Indexed: 01/25/2023]
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39
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Guo J, Qiao J, Zhang X. Effect of an alkalized-modified halloysite on PLA crystallization, morphology, mechanical, and thermal properties of PLA/halloysite nanocomposites. J Appl Polym Sci 2016. [DOI: 10.1002/app.44272] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Jianhua Guo
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510640 China
| | - Junxia Qiao
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510640 China
| | - Xin Zhang
- Department of Physics and Optoelectronic Engineering; Guangdong University of Technology; Guangzhou 510006 China
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40
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Mo H, Yang K, Li S, Jiang P. High thermal conductivity and high impact strength of epoxy nanodielectrics with functionalized halloysite nanotubes. RSC Adv 2016. [DOI: 10.1039/c6ra06717d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In situ grafting HNTs were synthesized by in situ as promising filler for epoxy nanodielectrics. The resulting nanodielectrics exhibit high thermal conductivity, high impact strength and lower dielectric loss.
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Affiliation(s)
- Hailin Mo
- Department of Polymer Science and Engineering
- Shanghai Key Lab of Electrical Insulation and Thermal Aging
- Shanghai Jiao Tong University
- 200240 Shanghai
- China
| | - Ke Yang
- Department of Polymer Science and Engineering
- Shanghai Key Lab of Electrical Insulation and Thermal Aging
- Shanghai Jiao Tong University
- 200240 Shanghai
- China
| | - Shengtao Li
- State Key Lab of Electrical Insulation and Power Equipment
- Xi'an Jiaotong University
- Xi'an
- China
| | - Pingkai Jiang
- Department of Polymer Science and Engineering
- Shanghai Key Lab of Electrical Insulation and Thermal Aging
- Shanghai Jiao Tong University
- 200240 Shanghai
- China
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41
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Christoforidis KC, Melchionna M, Montini T, Papoulis D, Stathatos E, Zafeiratos S, Kordouli E, Fornasiero P. Solar and visible light photocatalytic enhancement of halloysite nanotubes/g-C3N4 heteroarchitectures. RSC Adv 2016. [DOI: 10.1039/c6ra15581b] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The charged surface of HNTs allows efficient charge separation and increased pollutant adsorption, enhancing the overall photocatalytic performance of the HNTs/g-C3N4 heteroarchitectures.
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Affiliation(s)
- K. C. Christoforidis
- Department of Chemical and Pharmaceutical Sciences
- ICCOM-CNR Trieste Research Unit and INSTM Research Unit
- University of Trieste
- 34127 Trieste
- Italy
| | - M. Melchionna
- Department of Chemical and Pharmaceutical Sciences
- ICCOM-CNR Trieste Research Unit and INSTM Research Unit
- University of Trieste
- 34127 Trieste
- Italy
| | - T. Montini
- Department of Chemical and Pharmaceutical Sciences
- ICCOM-CNR Trieste Research Unit and INSTM Research Unit
- University of Trieste
- 34127 Trieste
- Italy
| | - D. Papoulis
- Department of Geology
- University of Patras
- 26504 Patras
- Greece
| | - E. Stathatos
- Department of Electrical Engineering
- Technological Educational Institute (TEI) of Western Greece
- 26334 Patras
- Greece
| | - S. Zafeiratos
- Institut de Chimie et Procédés Pour l'Energie
- l'Environnement et la Santé
- (ICPEES) ECPM
- University of Strasbourg
- 67087 Strasbourg
| | - E. Kordouli
- Department of Chemistry
- University of Patras
- 26504 Patras
- Greece
| | - P. Fornasiero
- Department of Chemical and Pharmaceutical Sciences
- ICCOM-CNR Trieste Research Unit and INSTM Research Unit
- University of Trieste
- 34127 Trieste
- Italy
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42
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Li XJ, Chen JB, Xu H, Xie L, Zhong GJ, Ran R, Ji X, Li ZM. Strong and ductile poly(butylene adipate-co-terephthalate) biocomposites fabricated by oscillation shear injection molding. J Appl Polym Sci 2015. [DOI: 10.1002/app.43312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xu-Juan Li
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Jing-Bin Chen
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Huan Xu
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Lan Xie
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Gan Ji Zhong
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Rong Ran
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Xu Ji
- College of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Zhong-Ming Li
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu Sichuan 610065 People's Republic of China
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43
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Sun P, Liu G, Lv D, Dong X, Wu J, Wang D. Simultaneous improvement in strength, toughness, and thermal stability of epoxy/halloysite nanotubes composites by interfacial modification. J Appl Polym Sci 2015. [DOI: 10.1002/app.43249] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Pan Sun
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics; Institute of Chemistry, The Chinese Academy of Sciences; Beijing 100190 China
| | - Guoming Liu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics; Institute of Chemistry, The Chinese Academy of Sciences; Beijing 100190 China
| | - Dong Lv
- Department of Mechanical and Aerospace Engineering; The Hong Kong University of Science and Technology; Hong Kong, China
| | - Xia Dong
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics; Institute of Chemistry, The Chinese Academy of Sciences; Beijing 100190 China
| | - Jingshen Wu
- Department of Mechanical and Aerospace Engineering; The Hong Kong University of Science and Technology; Hong Kong, China
| | - Dujin Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics; Institute of Chemistry, The Chinese Academy of Sciences; Beijing 100190 China
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44
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45
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Konnola R, Joji J, Parameswaranpillai J, Joseph K. Structure and thermo-mechanical properties of CTBN-grafted-GO modified epoxy/DDS composites. RSC Adv 2015. [DOI: 10.1039/c5ra10599d] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Carboxyl terminated poly(acrylonitrile-co-butadiene) (CTBN) is grafted on to graphite oxide (GO) to prepare GCTBN in order to improve the dispersion and interfacial bonding between GO and epoxy resin in an epoxy/DDS system.
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Affiliation(s)
- Raneesh Konnola
- Department of Chemistry
- Indian Institute of Space Science and Technology
- Thiruvananthapuram-695547
- India
| | - Jinu Joji
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhopal-462066
- India
| | | | - Kuruvilla Joseph
- Department of Chemistry
- Indian Institute of Space Science and Technology
- Thiruvananthapuram-695547
- India
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46
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Huang QL, Wu YJ, Xiao CF, Chen KK, Song L, Liu Z. Effects of post-treatment on the structure and properties of PVDF/FEP blend hollow fiber membranes. RSC Adv 2015. [DOI: 10.1039/c5ra13565f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polyvinylidene fluoride (PVDF)/poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) blend hollow fiber membranes were prepared by the melt-spinning method.
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Affiliation(s)
- Qing-lin Huang
- State Key Laboratory of Separation Membranes and Membrane Processes
- Department of Material Science and Engineering
- Tianjin Polytechnic University
- Tianjin
- China
| | - Yan-jie Wu
- Department of Textiles
- Tianjin Polytechnic University
- Tianjin
- China
| | - Chang-fa Xiao
- State Key Laboratory of Separation Membranes and Membrane Processes
- Department of Material Science and Engineering
- Tianjin Polytechnic University
- Tianjin
- China
| | - Kai-kai Chen
- State Key Laboratory of Separation Membranes and Membrane Processes
- Department of Material Science and Engineering
- Tianjin Polytechnic University
- Tianjin
- China
| | - Liang Song
- State Key Laboratory of Separation Membranes and Membrane Processes
- Department of Material Science and Engineering
- Tianjin Polytechnic University
- Tianjin
- China
| | - Zhen Liu
- State Key Laboratory of Separation Membranes and Membrane Processes
- Department of Material Science and Engineering
- Tianjin Polytechnic University
- Tianjin
- China
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47
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Huang W, Zeng S, Liu J, Sun L. Bi-axially oriented polystyrene/montmorillonite nanocomposite films. RSC Adv 2015. [DOI: 10.1039/c5ra09598k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polystyrene (PS)/montmorillonite (MMT) nanocomposite films were prepared by bi-axially stretching compounded and extruded PS/MMT nanocomposite sheets, resulting in an improved level of exfoliation and orientation during stretching.
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Affiliation(s)
- Wenhan Huang
- Department of Chemical & Biomolecular Engineering and Polymer Program
- Institute of Materials Science
- University of Connecticut
- Storrs
- USA
| | - Songshan Zeng
- Department of Chemical & Biomolecular Engineering and Polymer Program
- Institute of Materials Science
- University of Connecticut
- Storrs
- USA
| | - Jingjing Liu
- Department of Chemical & Biomolecular Engineering and Polymer Program
- Institute of Materials Science
- University of Connecticut
- Storrs
- USA
| | - Luyi Sun
- Department of Chemical & Biomolecular Engineering and Polymer Program
- Institute of Materials Science
- University of Connecticut
- Storrs
- USA
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