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Liu C, Crini G, Wilson LD, Balasubramanian P, Li F. Removal of contaminants present in water and wastewater by cyclodextrin-based adsorbents: A bibliometric review from 1993 to 2022. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 348:123815. [PMID: 38508365 DOI: 10.1016/j.envpol.2024.123815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 02/29/2024] [Accepted: 03/16/2024] [Indexed: 03/22/2024]
Abstract
Cyclodextrin (CD), a cyclic oligosaccharide from enzymatic starch breakdown, plays a crucial role in pharmaceuticals, food, agriculture, textiles, biotechnology, chemicals, and environmental applications, including water and wastewater treatment. In this study, a statistical analysis was performed using VOSviewer and Citespace to scrutinize 2038 articles published from 1993 to 2022. The investigation unveiled a notable upsurge in pertinent articles and citation counts, with China and USA contributing the highest publication volumes. The prevailing research focus predominantly revolves around the application of CD-based materials used as adsorbents to remove conventional contaminants such as dyes and metals. The CD chemistry allows the construction of materials with various architectures, including cross-linked, grafted, hybrid or supported systems. The main adsorbents are cross-linked CD polymers, including nanosponges, fibres and hybrid composites. Additionally, research efforts are actually concentrated on the synthesis of CD-based membranes, CD@graphene oxide, and CD@TiO2. These materials are proposed as adsorbents to remove emerging pollutants. By employing bibliometric analysis, this study delivers a comprehensive retrospective review and synthesis of research concerning CD-based adsorbents for the removal of contaminants from wastewater, thereby offering valuable insights for future large-scale application of CD-based adsorption materials.
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Affiliation(s)
- Chong Liu
- Department of Chemical & Materials Engineering, University of Auckland, 0926, New Zealand
| | - Grégorio Crini
- Chrono-environment, University of Franche-Comté, 25000 Besançon, France
| | - Lee D Wilson
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Room 165 Thorvaldson Bldg., Saskatoon, SK S7N 5C9, Canada
| | | | - Fayong Li
- College of Water Resources and Architectural Engineering, Tarim University, Xinjiang 843300, China.
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2
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Si Y, Luo H, Zhang P, Zhang C, Li J, Jiang P, Yuan W, Cha R. CD-MOFs: From preparation to drug delivery and therapeutic application. Carbohydr Polym 2024; 323:121424. [PMID: 37940296 DOI: 10.1016/j.carbpol.2023.121424] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 09/03/2023] [Accepted: 09/19/2023] [Indexed: 11/10/2023]
Abstract
Cyclodextrin metal-organic frameworks (CD-MOFs) show considerable advantages of edibility, degradability, low toxicity, and high drug loading, which have attracted enormous interest, especially in drug delivery. This review summarizes the typical synthesis approaches of CD-MOFs, the drug loading methods, and the mechanism of encapsulation and release. The influence of the structure of CD-MOFs on their drug encapsulation and release is highlighted. Finally, the challenges CD-MOFs face are discussed regarding biosafety assessment systems, stability in aqueous solution, and metal ion effect.
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Affiliation(s)
- Yanxue Si
- Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, PR China; Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, PR China.
| | - Huize Luo
- Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, PR China.
| | - Pai Zhang
- Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, PR China; Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, PR China.
| | - Chunliang Zhang
- Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, PR China; Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, PR China.
| | - Juanjuan Li
- School of Life Sciences, Hainan University, Haikou 570228, Hainan, PR China.
| | - Peng Jiang
- CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, No. 11 Zhongguancun Beiyitiao, Haidian District, Beijing 100190, P. R. China; College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, PR China.
| | - Wenbing Yuan
- School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, PR China.
| | - Ruitao Cha
- Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, PR China; NMPA Key Laboratory for Quality Research and Evaluation of Pharmaceutical Excipients, National Institutes for Food and Drug Control, 2 Tiantan Xi Li, Beijing 100050, PR China.
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3
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Liu X, Zhao Y, Xu Y, Liu C. Synthesis of γ-Cyclodextrin-Reduced Fe(III) Nanoparticles with Peroxidase-like Catalytic Activity for Bacteriostasis of Food. NANO LETTERS 2023; 23:9995-10003. [PMID: 37857332 DOI: 10.1021/acs.nanolett.3c03103] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Foodborne pathogens are a primary cause of human foodborne illness, making it imperative to explore novel antibacterial strategies for their control. In this study, Fe-γ-CD was successfully synthesized as a food antibacterial agent for use in milk and orange juice. The Fe-γ-CD consists of 6/11 Fe(II) and 5/11 Fe(III), which catalyze a Fenton-like catalytic reaction with H2O2 to generate •OH. Consequently, Fe-γ-CD exhibits exceptional peroxidase-like activity and broad-spectrum antibacterial efficacy. Fe-γ-CD not only disrupts the wall structure of ESBL-E. coli but also induces protein leakage and genetic destruction, ultimately leading to its death. Furthermore, Fe-γ-CD inhibits biofilm formation by MRSA and eradicates mature biofilms, resulting in MRSA's demise. Importantly, Fe-γ-CD demonstrates negligible cytotoxicity toward normal mammalian cells, making it an ideal candidate for application as an antibacterial agent in foodstuffs. These findings highlight that Fe-γ-CD is an effective tool for combating the spread of foodborne pathogens and food safety.
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Affiliation(s)
- Xiaohui Liu
- College of Life Sciences, Institute of Biomedical Engineering, Qingdao University, Ningxia Road 308, Qingdao 266071, Shandong, China
| | - Yuhan Zhao
- College of Life Sciences, Institute of Biomedical Engineering, Qingdao University, Ningxia Road 308, Qingdao 266071, Shandong, China
| | - Yuanhong Xu
- College of Life Sciences, Institute of Biomedical Engineering, Qingdao University, Ningxia Road 308, Qingdao 266071, Shandong, China
| | - Chengzhen Liu
- College of Life Sciences, Institute of Biomedical Engineering, Qingdao University, Ningxia Road 308, Qingdao 266071, Shandong, China
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4
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Li W, Gan Y, Li Y, Li S, Liang J, Fan W, Yu Z, Li Y, Ding Y, Xiao Z, Zhou J. Enhancing propellant performance through intermolecular interactions: cyclodextrin-based MOF loading in nitrocellulose. Phys Chem Chem Phys 2023; 25:29201-29210. [PMID: 37872864 DOI: 10.1039/d3cp03849a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Metal-organic frameworks (MOFs) offer promising opportunities for modifying energetic materials due to their micro-porous structure and high performance. In this study, we present a novel green MOF named cyclodextrin-MOF (CD-MOF), which incorporates potassium ions, synthesized using a simple methanol vapor diffusion approach. The CD-MOF incorporates potassium ions and enhances propellant performance through intermolecular force optimization with nitrocellulose (NC). Molecular dynamics simulations reveal stronger interactions between the CD-MOF and NC. The loading of the CD-MOF within NC forms a stable structure with resistance to migration and defense against crystalline precipitation and water absorption. Notably, in static combustion and pyrolysis tests, the CD-MOF exhibits efficient flame and flash inhibition. The thermal degradation and cauterization of the CD-MOF resulted in the formation of a complex microporous material capable of absorbing flammable and harmful gases such as CO, NO, NO2, and N2O. These findings shed light on the superior performance of the CD-MOF compared to conventional inorganic salts, and the comprehensive characterization and molecular simulations provide insights into the unique properties and applications of the CD-MOF, emphasizing its significant contribution to the field of green propellants.
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Affiliation(s)
- Wenjia Li
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Key Laboratory of Special Energy Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yuanqi Gan
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Key Laboratory of Special Energy Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yu Li
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Key Laboratory of Special Energy Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Shiying Li
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Key Laboratory of Special Energy Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Jinghao Liang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Key Laboratory of Special Energy Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Wenhao Fan
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Key Laboratory of Special Energy Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Zichun Yu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Key Laboratory of Special Energy Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yichang Li
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Key Laboratory of Special Energy Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yajun Ding
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Key Laboratory of Special Energy Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Zhongliang Xiao
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Key Laboratory of Special Energy Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Jie Zhou
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Key Laboratory of Special Energy Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
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5
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Li X, Di Carluccio C, Miao H, Zhang L, Shang J, Molinaro A, Xu P, Silipo A, Yu B, Yang Y. Promoter-Controlled Synthesis and Conformational Analysis of Cyclic Mannosides up to a 32-mer. Angew Chem Int Ed Engl 2023; 62:e202307851. [PMID: 37433753 DOI: 10.1002/anie.202307851] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/10/2023] [Accepted: 07/11/2023] [Indexed: 07/13/2023]
Abstract
Cyclodextrins are widely used as carriers of small molecules for drug delivery owing to their remarkable host properties and excellent biocompatibility. However, cyclic oligosaccharides with different sizes and shapes are limited. Cycloglycosylation of ultra-large bifunctional saccharide precursors is challenging due to the constrained conformational spaces. Herein we report a promoter-controlled cycloglycosylation approach for the synthesis of cyclic α-(1→6)-linked mannosides up to a 32-mer. Cycloglycosylation of the bifunctional thioglycosides and (Z)-ynenoates was found to be highly dependent on the promoters. In particular, a sufficient amount of a gold(I) complex played a key role in the proper preorganization of the ultra-large cyclic transition state, providing a cyclic 32-mer polymannoside, which represents the largest synthetic cyclic polysaccharide to date. NMR experiments and a computational study revealed that the cyclic 2-mer, 4-mer, 8-mer, 16-mer, and 32-mer mannosides adopted different conformational states and shapes.
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Affiliation(s)
- Xiaona Li
- Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, Shanghai Key Laboratory of New Drug Design, Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Cristina Di Carluccio
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126, Napoli, Italy
| | - He Miao
- Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, Shanghai Key Laboratory of New Drug Design, Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Lvfeng Zhang
- Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, Shanghai Key Laboratory of New Drug Design, Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Jintao Shang
- Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, Shanghai Key Laboratory of New Drug Design, Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Antonio Molinaro
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126, Napoli, Italy
- Department of Chemistry, School of Science, Osaka University, 1-1 Osaka University Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Peng Xu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Alba Silipo
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126, Napoli, Italy
- Department of Chemistry, School of Science, Osaka University, 1-1 Osaka University Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Biao Yu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - You Yang
- Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, Shanghai Key Laboratory of New Drug Design, Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
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6
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Tong F, Zhou Y, Xu Y, Chen Y, Yudintceva N, Shevtsov M, Gao H. Supramolecular nanomedicines based on host-guest interactions of cyclodextrins. EXPLORATION (BEIJING, CHINA) 2023; 3:20210111. [PMID: 37933241 PMCID: PMC10624390 DOI: 10.1002/exp.20210111] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 02/09/2023] [Indexed: 11/08/2023]
Abstract
In the biomedical and pharmaceutical fields, cyclodextrin (CD) is undoubtedly one of the most frequently used macrocyclic compounds as the host molecule because it has good biocompatibility and can increase the solubility, bioavailability, and stability of hydrophobic drug guests. In this review, we generalized the unique properties of CDs, CD-related supramolecular nanocarriers, supramolecular controlled release systems, and targeting systems based on CDs, and introduced the paradigms of these nanomedicines. In addition, we also discussed the prospects and challenges of CD-based supramolecular nanomedicines to facilitate the development and clinical translation of these nanomedicines.
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Affiliation(s)
- Fan Tong
- Key Laboratory of Drug Targeting and Drug Delivery SystemsWest China School of PharmacySichuan UniversityChengduChina
| | - Yang Zhou
- Key Laboratory of Drug Targeting and Drug Delivery SystemsWest China School of PharmacySichuan UniversityChengduChina
| | - Yanyan Xu
- Key Laboratory of Drug Targeting and Drug Delivery SystemsWest China School of PharmacySichuan UniversityChengduChina
| | - Yuxiu Chen
- Key Laboratory of Drug Targeting and Drug Delivery SystemsWest China School of PharmacySichuan UniversityChengduChina
| | - Natalia Yudintceva
- Institute of Cytology of the Russian Academy of Sciences (RAS)St. PetersburgRussia
| | - Maxim Shevtsov
- Institute of Cytology of the Russian Academy of Sciences (RAS)St. PetersburgRussia
| | - Huile Gao
- Key Laboratory of Drug Targeting and Drug Delivery SystemsWest China School of PharmacySichuan UniversityChengduChina
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7
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Delyagina E, Garibyan A, Agafonov M, Terekhova I. Regularities of Encapsulation of Tolfenamic Acid and Some Other Non-Steroidal Anti-Inflammatory Drugs in Metal-Organic Framework Based on γ-Cyclodextrin. Pharmaceutics 2022; 15:pharmaceutics15010071. [PMID: 36678700 PMCID: PMC9867401 DOI: 10.3390/pharmaceutics15010071] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/20/2022] [Accepted: 12/22/2022] [Indexed: 12/29/2022] Open
Abstract
Metal-organic frameworks based on cyclodextrins (CDs) have been proposed as promising drug delivery systems due to their large surface area, variable pore size, and biocompatibility. In the current work, we investigated an incorporation of tolfenamic acid (TA), a representative of non-steroidal anti-inflammatory drugs (NSAIDs), in a metal-organic framework based on γ-cyclodextrin and potassium cations (γCD-MOF). Composites γCD-MOF/TA obtained by absorption and co-crystallization methods were characterized using powder X-ray diffraction, low temperature nitrogen adsorption/desorption, scanning electron microscopy, and FTIR spectroscopy. It was demonstrated that TA loaded in γCD-MOF has an improved dissolution profile. However, the inclusion of TA in γ-CD reduces the membrane permeability of the drug. A comparative analysis of the encapsulation of different NSAIDs in γCD-MOF was performed. The impact of NSAID structure on the loading capacity was considered for the first time. It was revealed that the presence of heterocycles in the structure and drug lipophilicity influence the loading efficiency of NSAIDs in γCD-MOF.
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Affiliation(s)
- Ekaterina Delyagina
- Institute of Mathematics, Information Technology and Natural Sciences, Ivanovo State University, 153025 Ivanovo, Russia
- Correspondence:
| | - Anna Garibyan
- G.A. Krestov Institute of Solution Chemistry of RAS, 153045 Ivanovo, Russia
| | - Mikhail Agafonov
- G.A. Krestov Institute of Solution Chemistry of RAS, 153045 Ivanovo, Russia
| | - Irina Terekhova
- G.A. Krestov Institute of Solution Chemistry of RAS, 153045 Ivanovo, Russia
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8
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Cecone C, Hoti G, Caldera F, Zanetti M, Trotta F, Bracco P. NADES-derived beta cyclodextrin-based polymers as sustainable precursors to produce sub-micrometric cross-linked mats and fibrous carbons. Polym Degrad Stab 2022. [DOI: 10.1016/j.polymdegradstab.2022.110040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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9
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Tao L, Xiao A, Lyu X, Tang Z, Yu Z, Shen Z, Fan X. Preparation of Complex Ratio‐Dependent Nanomaterials from Polymerizable Hydrogen‐Bonded Liquid Crystal. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202200132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lei Tao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
- Shenzhen Key Laboratory of Functional Polymers, School of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 PR China
| | - Anqi Xiao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Xiaolin Lyu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Zhehao Tang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Zhen‐Qiang Yu
- Shenzhen Key Laboratory of Functional Polymers, School of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 PR China
| | - Zhihao Shen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Xinghe Fan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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10
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Yang G, Zhang Q. In-situ Polymerization and Flame Retardant Mechanism of Bio-based Nitrogen and Phosphorus Macromolecular Flame Retardant in Plywood. Macromol Rapid Commun 2022; 43:e2200018. [PMID: 35212435 DOI: 10.1002/marc.202200018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 02/08/2022] [Indexed: 11/10/2022]
Abstract
To improve the flame retardant performance of the plywood and reduce the reagent loss and moisture absorption of the flame retardant, the bio-based supramolecular flame retardant has been prepared by vacuum-pressure impregnation and high-temperature in-situ polymerization in plywood. The best value of bonding strength appears at 170 ℃, and the LOI of 170BF-B plywood is 42.3%. After hot pressing, the moisture absorption rate of 170BF-B veneer is only 18.51%, while the loss resistance rate achieves 83.45%. Its residue at 700 ℃ is 91.36% higher than that of poplar veneer. In the combustion process, the PHRR and HRR of 170BF-B plywood are only 10.69% and 37.11% of that of untreated plywood. After combustion, an intumescent flame retardant layer exhibits a graphitization trend. In the flame retardant layer, there are not only functional groups, such as P = O, PO4 3- , P-O-C decomposed by flame retardant but also characteristic functional groups of wood fiber, like C = O, C-H, etc. The prepolymer BF-B, which is composed of phytic acid, urea and, dicyandiamide polymerized with chitosan or lignocellulose to form a supramolecular flame retardant connected with P-O-C and P-O-N functional groups, thus improving the flame retardant and anti-loss property by in-situ polymerization. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Guochao Yang
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, No. 35, Tsinghua East Road, Haidian District, Beijing, 100083, P. R. China
| | - Qiuhui Zhang
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, No. 35, Tsinghua East Road, Haidian District, Beijing, 100083, P. R. China
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11
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Li B, Xuan L, Wu L. Polyoxometalate-Containing Supramolecular Gels. Macromol Rapid Commun 2022; 43:e2200019. [PMID: 35102624 DOI: 10.1002/marc.202200019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 01/27/2022] [Indexed: 11/08/2022]
Abstract
Supramolecular gels are important soft materials with various applications, which are fabricated through hydrogen bonding, π-π stacking, electrostatic or host-guest interactions. Introducing functional groups, especially inorganic components, is an efficient strategy to obtain gels with robust architecture and high performance. Polyoxometalates (POMs), as a class of negatively-charged clusters, have defined structures and multiple interaction sites, resulting in their potential as building blocks for constructing POM-containing supramolecular gels. The introduction of POMs into gels not only provides strong driving forces for the formation of gels due to the characteristics of charged cluster and oxygen-rich surface, but also brings new properties sourcing from unique electronic structures of POMs. Though many POM-containing gels have been reported, a comprehensive review is still absent. Herein, the concept of POM-containing gels is discussed, following with the design strategies and driving forces. To better understand the results in the literature, detailed examples, which are classified into several categories based on the types of organic components, are presented to illustrate the gelation process and gel structures. Moreover, applications of POM-containing gels in energy chemistry, sustainable chemistry and other aspects are also reviewed, as well as the future developments of this field. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Bao Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Luyun Xuan
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Lixin Wu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
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