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Ravishankar K, Km S, Sreekumar S, Sivan S, Kiran MS, Lobo NP, Jaisankar SN, Raghavachari D. Microwave-assisted synthesis of crosslinked ureido chitosan for hemostatic applications. Int J Biol Macromol 2024; 260:129648. [PMID: 38246465 DOI: 10.1016/j.ijbiomac.2024.129648] [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: 08/04/2023] [Revised: 01/15/2024] [Accepted: 01/18/2024] [Indexed: 01/23/2024]
Abstract
In this study, we present a facile method for introducing hydrophilic ureido groups (NH2-CO-NH-) into chitosan using a microwave-assisted reaction with molten urea, with the aim of enhancing chitosan's interaction with blood components for improved hemostasis. The formation of the ureido groups through nucleophilic addition reaction between the amine groups in chitosan and in situ generated isocyanic acid was confirmed by FTIR, CP/TOSS 13C NMR, and CP/MAS 15N NMR spectroscopic techniques. However, in stark contrast to the glucans, the said modification introduced extensive crosslinking in chitosan. Spectroscopic studies identified these crosslinks as carbamate bridges (-NH-COO-), which were likely formed by the reaction between the ureido groups and hydroxyl groups of adjacent chains through an isocyanate intermediate. These carbamate bridges improved ureido chitosan's environmental stability, making it particularly resistant to changes in pH and temperature. In comparison to chitosan, the crosslinked ureido chitosan synthesized here exhibited good biocompatibility and cell adhesion, rapidly arrested the bleeding in a punctured artery with minimal hemolysis, and induced early activation and aggregation of platelets. These properties render it an invaluable material for applications in hemostasis, particularly in scenarios that necessitate stability against pH variations and degradation.
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Affiliation(s)
- Kartik Ravishankar
- Polymer Science and Technology Division, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600 020, Tamil Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India.
| | - Shelly Km
- Department of Chemistry, Indian Institute of Technology Madras (IIT Madras), Chennai 600 036, Tamil Nadu, India
| | - Sreelekshmi Sreekumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India; Biological Materials Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600 020, Tamil Nadu, India
| | - Sisira Sivan
- Polymer Science and Technology Division, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600 020, Tamil Nadu, India
| | - Manikantan Syamala Kiran
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India; Biological Materials Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600 020, Tamil Nadu, India
| | - Nitin Prakash Lobo
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India; Centre for Analysis, Testing, Evaluation& Reporting Services (CATERS), CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600 020, Tamil Nadu, India
| | - Sellamuthu N Jaisankar
- Polymer Science and Technology Division, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600 020, Tamil Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India.
| | - Dhamodharan Raghavachari
- Department of Chemistry, Indian Institute of Technology Madras (IIT Madras), Chennai 600 036, Tamil Nadu, India
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2
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Lin CF, Karlsson O, Das O, Mensah RA, Mantanis GI, Jones D, Antzutkin ON, Försth M, Sandberg D. High Leach-Resistant Fire-Retardant Modified Pine Wood ( Pinus sylvestris L.) by In Situ Phosphorylation and Carbamylation. ACS OMEGA 2023; 8:11381-11396. [PMID: 37008136 PMCID: PMC10061617 DOI: 10.1021/acsomega.3c00146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 03/02/2023] [Indexed: 06/19/2023]
Abstract
The exterior application of fire-retardant (FR) timber necessitates it to have high durability because of the possibility to be exposed to rainfall. In this study, water-leaching resistance of FR wood has been imparted by grafting phosphate and carbamate groups of the water-soluble FR additives ammonium dihydrogen phosphate (ADP)/urea onto the hydroxyl groups of wood polymers via vacuum-pressure impregnation, followed by drying/heating in hot air. A darker and more reddish wood surface was observed after the modification. Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, solid-state 13C cross-polarization magic-angle-spinning nuclear magnetic resonance (13C CP-MAS NMR), and direct-excitation 31P MAS NMR suggested the formation of C-O-P covalent bonds and urethane chemical bridges. Scanning electron microscopy/energy-dispersive X-ray spectrometry suggested the diffusion of ADP/urea into the cell wall. The gas evolution analyzed by thermogravimetric analysis coupled with quadrupole mass spectrometry revealed a potential grafting reaction mechanism starting with the thermal decomposition of urea. Thermal behavior showed that the FR-modified wood lowered the main decomposition temperature and promoted the formation of char residues at elevated temperatures. The FR activity was preserved even after an extensive water-leaching test, confirmed by the limiting oxygen index (LOI) and cone calorimetry. The reduction of fire hazards was achieved through the increase of the LOI to above 80%, reduction of 30% of the peak heat release rate (pHRR2), reduction of smoke production, and a longer ignition time. The modulus of elasticity of FR-modified wood increased by 40% without significantly decreasing the modulus of rupture.
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Affiliation(s)
- Chia-feng Lin
- Wood
Science and Engineering, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Forskargatan 1, SE-931 77 Skellefteå, Sweden
| | - Olov Karlsson
- Wood
Science and Engineering, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Forskargatan 1, SE-931 77 Skellefteå, Sweden
| | - Oisik Das
- Structural
and Fire Engineering, Department of Civil, Environmental and Natural
Resources Engineering, Luleå University
of Technology, SE-971 87 Luleå, Sweden
| | - Rhoda Afriyie Mensah
- Structural
and Fire Engineering, Department of Civil, Environmental and Natural
Resources Engineering, Luleå University
of Technology, SE-971 87 Luleå, Sweden
| | - George I. Mantanis
- Laboratory
of Wood Science and Technology, Department of Forestry, Wood Sciences
and Design, University of Thessaly, GR-431 00 Karditsa, Greece
| | - Dennis Jones
- Wood
Science and Engineering, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Forskargatan 1, SE-931 77 Skellefteå, Sweden
- Department
of Wood Processing and Biomaterials, Faculty of Forestry and Wood
Sciences, Czech University of Life Sciences
Prague, Praha 6-Suchdol, CZ-16521 Prague, Czech Republic
| | - Oleg N. Antzutkin
- Chemistry
of Interfaces, Department of Civil, Environmental and Natural Resources
Engineering, Luleå University of
Technology, SE-971 87 Luleå, Sweden
| | - Michael Försth
- Structural
and Fire Engineering, Department of Civil, Environmental and Natural
Resources Engineering, Luleå University
of Technology, SE-971 87 Luleå, Sweden
| | - Dick Sandberg
- Wood
Science and Engineering, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Forskargatan 1, SE-931 77 Skellefteå, Sweden
- Department
of Wood Processing and Biomaterials, Faculty of Forestry and Wood
Sciences, Czech University of Life Sciences
Prague, Praha 6-Suchdol, CZ-16521 Prague, Czech Republic
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3
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Tabaght FE, Azzaoui K, Idrissi AE, Jodeh S, Khalaf B, Rhazi L, Bellaouchi R, Asehraou A, Hammouti B, Sabbahi R. Synthesis, characterization, and biodegradation studies of new cellulose-based polymers. Sci Rep 2023; 13:1673. [PMID: 36717660 PMCID: PMC9887067 DOI: 10.1038/s41598-023-28298-5] [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: 11/08/2022] [Accepted: 01/16/2023] [Indexed: 01/31/2023] Open
Abstract
New cellulose carbamates and cellulose acetate carbamates were prepared by classical addition reaction of isocyanates with alcohols. A Telomerization technique was used to make the grafted molecules strongly anchored and more hydrophobic. These molecules were grafted into cellulose and CA chains, respectively. The structures of the synthesized derivatives were confirmed using Nuclear Magnetic Resonance Spectroscopy, Fourier Transform Infrared and Thermogravimetric Analysis, and their solubility phenomenon was also established, and the carbamate derivatives showed better solubility compared to cellulose. Their ability to biodegrade was investigated, and it was concluded that Cell-P1 and CA-P1 derivatives are more biodegradable than the other samples. These results suggest that the resulting compounds can be used effectively in many useful industrial fields, for instance, eco-friendly food packaging, domains that use materials that are environmentally friendly and sustainable and the development of green chemistry.
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Affiliation(s)
- F E Tabaght
- Laboratory of Applied Chemistry and Environment, Faculty of Sciences, Mohammed First University, 60000, Oujda, Morocco
| | - K Azzaoui
- Laboratory of Engineering, Electrochemistry, Modeling and Environment, Faculty of Sciences, Sidi Mohamed Ben Abdellah University, 30000, Fez, Morocco.
| | - A El Idrissi
- Laboratory of Applied Chemistry and Environment, Faculty of Sciences, Mohammed First University, 60000, Oujda, Morocco
| | - S Jodeh
- Department of Chemistry, An-Najah National University, P.O. Box 7, Nablus, Palestine.
| | - B Khalaf
- Department of Chemistry, Arab American University, Jenin, Palestine
| | - L Rhazi
- Institut Polytechnique UniLaSalle Transformations & Agro-Resources Research Unit (ULR7519), 19 Rue Pierre Waguet, BP 30313, 60026, Beauvais, France
| | - R Bellaouchi
- Laboratory of Biochemistry and Biotechnology, Mohammed First University, Faculty of Sciences, 60000, Oujda, Morocco
| | - A Asehraou
- Laboratory of Biochemistry and Biotechnology, Mohammed First University, Faculty of Sciences, 60000, Oujda, Morocco
| | - B Hammouti
- Laboratory of Applied Chemistry and Environment, Faculty of Sciences, Mohammed First University, 60000, Oujda, Morocco
| | - R Sabbahi
- Laboratory of Development and Valorization of Resources in Desert Zones, Higher School of Technology, Ibn Zohr University, Quartier 25 Mars, P.O. Box 3007, Laayoune, Morocco
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4
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Li F, Li Y, Novoselov KS, Liang F, Meng J, Ho SH, Zhao T, Zhou H, Ahmad A, Zhu Y, Hu L, Ji D, Jia L, Liu R, Ramakrishna S, Zhang X. Bioresource Upgrade for Sustainable Energy, Environment, and Biomedicine. NANO-MICRO LETTERS 2023; 15:35. [PMID: 36629933 PMCID: PMC9833044 DOI: 10.1007/s40820-022-00993-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
We conceptualize bioresource upgrade for sustainable energy, environment, and biomedicine with a focus on circular economy, sustainability, and carbon neutrality using high availability and low utilization biomass (HALUB). We acme energy-efficient technologies for sustainable energy and material recovery and applications. The technologies of thermochemical conversion (TC), biochemical conversion (BC), electrochemical conversion (EC), and photochemical conversion (PTC) are summarized for HALUB. Microalgal biomass could contribute to a biofuel HHV of 35.72 MJ Kg-1 and total benefit of 749 $/ton biomass via TC. Specific surface area of biochar reached 3000 m2 g-1 via pyrolytic carbonization of waste bean dregs. Lignocellulosic biomass can be effectively converted into bio-stimulants and biofertilizers via BC with a high conversion efficiency of more than 90%. Besides, lignocellulosic biomass can contribute to a current density of 672 mA m-2 via EC. Bioresource can be 100% selectively synthesized via electrocatalysis through EC and PTC. Machine learning, techno-economic analysis, and life cycle analysis are essential to various upgrading approaches of HALUB. Sustainable biomaterials, sustainable living materials and technologies for biomedical and multifunctional applications like nano-catalysis, microfluidic and micro/nanomotors beyond are also highlighted. New techniques and systems for the complete conversion and utilization of HALUB for new energy and materials are further discussed.
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Affiliation(s)
- Fanghua Li
- Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore, 119260, Singapore
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Yiwei Li
- School of Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- John A Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
- The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics - Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, People's Republic of China
| | - K S Novoselov
- Centre for Advanced 2D Materials, National University of Singapore, Singapore, 117546, Singapore
- School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK
| | - Feng Liang
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, 02114, USA
| | - Jiashen Meng
- School of Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Shih-Hsin Ho
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Tong Zhao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Hui Zhou
- Department of Energy and Power Engineering, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Awais Ahmad
- Departamento de Quimica Organica, Universidad de Cordoba, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, 14014, Cordoba, Spain
| | - Yinlong Zhu
- Department of Chemical Engineering, Monash University, Clayton, VIC, 3800, Australia
| | - Liangxing Hu
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Dongxiao Ji
- Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore, 119260, Singapore
| | - Litao Jia
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Rui Liu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Seeram Ramakrishna
- Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore, 119260, Singapore
| | - Xingcai Zhang
- John A Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
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5
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Yang R, Lu X, Gu X. Pyrolysis Kinetics of a Lignin-Modified Cellulose Composite Film. ACS OMEGA 2021; 6:35584-35592. [PMID: 34984289 PMCID: PMC8717570 DOI: 10.1021/acsomega.1c05289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/07/2021] [Indexed: 06/14/2023]
Abstract
Cellulose is the most abundant natural biopolymer material, which has been widely used in film making and food packaging in recent years. However, lignin, a natural bioaromatic material, is always applied as a waste resource due to its low utilization efficiency. In this study, a ZnCl2/CaCl2/cellulose mixed system was used to prepare film materials via a regeneration method. The chemical structure and corresponding properties were characterized. The thermal decomposition process of film materials showed that with an increase of the heating rate, the maximum weight loss temperature gradually shifted to the higher-temperature region. Additionally, the combination of lignin with cellulose as composite films can effectively improve thermal stability. Furthermore, kinetics methods such as Kissing-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO), and Friedman were used to calculate the average activation energy (E). This study proposed a facile method for preparing biobased multifunctional composite films using two kinds of naturally renewable materials.
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6
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Abstract
Climate change, waste disposal challenges, and emissions generated by the manufacture of non-renewable materials are driving forces behind the production of more sustainable composite materials. All-cellulose composites (ACCs) originate from renewable biomass, such as trees and other plants, and are considered fully biodegradable. Dissolving cellulose is a common part of manufacturing ACCs, and currently there is a lot of research focused on effective, but also more environmentally friendly cellulose solvents. There are several beneficial properties of ACC materials that make them competitive: light weight, recyclability, low toxicity, good optical, mechanical, and gas barrier properties, and abundance of renewable plant-based raw material. The most prominent ACC applications are currently found in the food packing, medical, technical and vehicle industries. All-cellulose nanocomposites (ACNCs) expand the current research field and can offer a variety of more specific and functional applications. This review provides an overview of the manufacture of sustainable ACCs from lignocellulose, purified cellulose, and cellulosic textiles. There is an introduction of the cellulose dissolution practices of creating ACCs that are currently researched, the structure of cellulose during complete or partial dissolution is discussed, and a brief overview of factors which influence composite properties is presented.
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7
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Abstract
Abstract
The presented chapter deals with structure, morphology, and properties aspects concerning cellulose-based polymers in both research and industrial production, such as cellulose fibers, cellulose membranes, cellulose nanocrystals, and bacterial cellulose, etc. The idea was to highlight the main cellulose-based polymers and cellulose derivatives, as well as the dissolution technologies in processing cellulose-based products. The structure and properties of cellulose are introduced briefly. The main attention has been paid to swelling and dissolution of cellulose in order to yield various kinds of cellulose derivatives through polymerization. The main mechanisms and methods are also presented. Finally, the environmental friendly and green cellulose-based polymers will be evaluated as one of the multifunctional and smart materials with significant progress.
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Affiliation(s)
- Xing Zhou
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology , Xi’an 710048 , P. R. China
- School of Materials Science and Engineering, Xi’an University of Technology , Xi’an 710048 , P. R. China
| | - Yaya Hao
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology , Xi’an 710048 , P. R. China
| | - Xin Zhang
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology , Xi’an 710048 , P. R. China
| | - Xinyu He
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology , Xi’an 710048 , P. R. China
| | - Chaoqun Zhang
- College of Materials and Energy, South China Agricultural University , Guangzhou 510642 , P. R. China
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8
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Dissolution and Interaction of Cellulose Carbamate in NaOH/ZnO Aqueous Solutions. Polymers (Basel) 2021; 13:polym13071092. [PMID: 33808408 PMCID: PMC8037852 DOI: 10.3390/polym13071092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 03/28/2021] [Accepted: 03/28/2021] [Indexed: 12/03/2022] Open
Abstract
The dissolution and molecular interactions of cellulose carbamate (CC) in NaOH/ZnO aqueous solutions were studied using optical microscopy, differential scanning calorimetry (DSC), 1H NMR, dynamic light scattering (DLS), atomic force microscopy (AFM), transmission electron microscopy (TEM), and molecular dynamic simulation. The dissolution of CC in NaOH/ZnO aqueous solutions using the freezing–thawing method was an exothermic process, and the lower temperature was favorable for the dissolution of CC. ZnO dissolved in NaOH aqueous solutions with the formation of Zn(OH)42−, and no free Zn2+ ions existed in the solvents. NaOH/Na2Zn(OH)4 system formed strong interactions with the hydroxyl groups of CC to improve its solubility and the stability of CC solution. The results indicate that 7 wt% NaOH/1.6 wt% ZnO aqueous solution was the most appropriate solvent for the dissolution of CC. This work revealed the dissolution interaction of CC-NaOH/ZnO solutions, which is beneficial for the industrialization of the CarbaCell process.
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Harada N, Mitsukami Y, Uyama H. Preparation and characterization of water-swellable hydrogel-forming porous cellulose beads. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123381] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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10
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Metal oxide-cellulose nanocomposites for the removal of toxic metals and dyes from wastewater. Int J Biol Macromol 2020; 164:2477-2496. [DOI: 10.1016/j.ijbiomac.2020.08.074] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 08/07/2020] [Accepted: 08/07/2020] [Indexed: 02/07/2023]
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Kostag M, Jedvert K, El Seoud OA. Engineering of sustainable biomaterial composites from cellulose and silk fibroin: Fundamentals and applications. Int J Biol Macromol 2020; 167:687-718. [PMID: 33249159 DOI: 10.1016/j.ijbiomac.2020.11.151] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 11/13/2020] [Accepted: 11/23/2020] [Indexed: 12/18/2022]
Abstract
This review addresses composites prepared from cellulose (Cel) and silk fibroin (SF) to generate multifunctional, biocompatible, biodegradable materials such as fibers, films and scaffolds for tissue engineering. First, we discuss briefly the molecular structures of Cel and SF. Their structural features explain why certain solvents, e.g., ionic liquids, inorganic electrolyte solutions dissolve both biopolymers. We discuss the mechanisms of Cel dissolution because in many cases they also apply to (much less studied) SF dissolution. Subsequently, we discuss the fabrication and characterization of Cel/SF composite biomaterials. We show how the composition of these materials beneficially affects their mechanical properties, compared to those of the precursor biopolymers. We also show that Cel/SF materials are excellent and versatile candidates for biomedical applications because of the inherent biocompatibility of their components.
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Affiliation(s)
- Marc Kostag
- Institute of Chemistry, The University of São Paulo, Professor Lineu Prestes Av. 748, 05508-000 São Paulo, SP, Brazil
| | - Kerstin Jedvert
- Fiber Development, Materials and Production, Research Institutes of Sweden (RISE IVF), Box 104, SE-431 22 Mölndal, Sweden
| | - Omar A El Seoud
- Institute of Chemistry, The University of São Paulo, Professor Lineu Prestes Av. 748, 05508-000 São Paulo, SP, Brazil.
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Borah P, Shivling VD, Banik BK, Sahoo BM. An Overview on Steroids and Microwave Energy in Multi-Component Reactions towards the Synthesis of Novel Hybrid Molecules. Curr Org Synth 2020; 17:594-609. [PMID: 32359339 DOI: 10.2174/1570179417666200503050106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 03/14/2020] [Accepted: 03/28/2020] [Indexed: 11/22/2022]
Abstract
In recent years, hybrid systems are gaining considerable attention owing to their various biological applications in drug development. Generally, hybrid molecules are constructed from different molecular entities to generate a new functional molecule with improved biological activities. There already exist a large number of naturally occurring hybrid molecules based on both non-steroid and steroid frameworks synthesized by nature through mixed biosynthetic pathways such as, a) integration of the different biosynthetic pathways or b) Carbon- Carbon bond formation between different components derived through different biosynthetic pathways. Multicomponent reactions are a great way to generate efficient libraries of hybrid compounds with high diversity. Throughout the scientific history, the most common factors developing technologies are less energy consumption and avoiding the use of hazardous reagents. In this case, microwave energy plays a vital role in chemical transformations since it involves two very essential criteria of synthesis, minimizing energy consumption required for heating and time required for the reaction. This review summarizes the use of microwave energy in the synthesis of steroidal and non-steroidal hybrid molecules and the use of multicomponent reactions.
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Affiliation(s)
| | | | | | - Biswa Mohan Sahoo
- Roland Institute of Pharmaceutical Sciences, Berhampur-760010, Odisha, India
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13
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Fan X, Li M, Yang Q, Wan G, Li Y, Li N, Tang K. Morphology-controllable cellulose/chitosan sponge for deep wound hemostasis with surfactant and pore-foaming agent. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 118:111408. [PMID: 33255011 DOI: 10.1016/j.msec.2020.111408] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 07/30/2020] [Accepted: 08/18/2020] [Indexed: 01/12/2023]
Abstract
Developing a facile and scalable synthetic route is important to explore the potential application of functional cellulose sponges. Here, a simple and efficient strategy to produce porous and hydrophilic cellulose sponges using surfactant and pore-foaming agent is demonstrated. The obtained cellulose sponges exhibit high water absorption capacity and rapid shape recoverability. The introduction of chitosan endows the chitosan/cellulose composite sponge with good mechanical properties. Inhibitory effects on Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa are particularly proved. Besides, the result of the dynamic whole blood clotting time indicated that the chitosan/cellulose composite sponge has better coagulation ability than those of traditional gauze and gelatin sponge. Animal experiment further showed that rapid hemostasis within 105 s could be reached with the composite sponge. Good biocompatibility of the composite sponge is proved by the results of hemocompatibility and cytotoxicity, indicating an excellent candidate as a rapid hemostatic material.
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Affiliation(s)
- Xialian Fan
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Mengya Li
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Qian Yang
- The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Guangming Wan
- The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Yijin Li
- School of Nursing and Health, Zhengzhou University, Zhengzhou 450001, China
| | - Na Li
- School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023,China
| | - Keyong Tang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China.
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14
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Fan X, Li Y, Li N, Wan G, Ali MA, Tang K. Rapid hemostatic chitosan/cellulose composite sponge by alkali/urea method for massive haemorrhage. Int J Biol Macromol 2020; 164:2769-2778. [PMID: 32791271 DOI: 10.1016/j.ijbiomac.2020.07.312] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/09/2020] [Accepted: 07/29/2020] [Indexed: 01/14/2023]
Abstract
Here, a simple and efficient strategy to produce porous and hydrophilic chitosan/cellulose sponge using surfactant and pore-forming agent is demonstrated. The preparation of composite sponge by LiOH/KOH/urea solvent system effectively solve the problems of uneven distribution of chitosan, poor softness and acid residue caused by soaking in chitosan acid solution. The obtained chitosan/cellulose sponges exhibit high water absorption capacity and rapid shape recoverability, as well as good mechanical properties. Effective inhibitory on Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa are particularly proved. Besides, the result of the dynamic whole blood clotting time indicated that the chitosan/cellulose composite sponge has better coagulation ability than those of traditional gauze and gelatin sponge. Animal experiment further showed that rapid hemostasis within 34 s can be reached with the composite sponge. Better biocompatibility of the composite sponge is proved by the results of hemocompatibility and cytotoxicity, indicating an excellent candidate for rapid hemostasis in massive haemorrhage.
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Affiliation(s)
- Xialian Fan
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Yijin Li
- School of Nursing and Health, Zhengzhou University, Zhengzhou 450001, China
| | - Na Li
- School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Guangming Wan
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.
| | - Muhammad Amir Ali
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Keyong Tang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China.
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15
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Cen D, Ding Y, Wei R, Huang X, Gao G, Wu G, Mei Y, Bao Z. Synthesis of Metal Oxide/Carbon Nanofibers via Biostructure Confinement as High-Capacity Anode Materials. ACS APPLIED MATERIALS & INTERFACES 2020; 12:29566-29574. [PMID: 32510190 DOI: 10.1021/acsami.0c03390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
For applications in energy storage and conversion, many metal oxide (MO)/C composite fibers have been synthesized using cellulose as the template. However, MO particles in carbon fibers usually experience anomalous growth to a size of >200 nm, which is detrimental to the overall performance of the composite. In this paper, we report the successful development of a generic approach to synthesize a fiber composite with highly dispersed MO nanoparticles (10-80 nm) via simple swelling, nitrogen doping, and carbonization of the cellulose microfibril. The growth of the MO nanoparticles is confined by the structure of the microfibrils. Density functional theory calculation further reveals that the doped N atoms supply ample nucleation sites for size confinement of the nanoparticles. The encapsulation structure of small MO nanoparticles in the conductive carbon matrix improves their electrochemical performance. For example, the formed SnOx/carbon nanocomposite exhibits high specific capacities of 1011.0 mA h g-1 at 0.5 A g-1 and 581.8 mA h g-1 at 5 A g-1. Moreover, the fiber-like nanocomposite can be combined with carbon nanotubes to form a flexible binder-free electrode with a capacity of ∼10 mA h cm-2, far beyond the commercial level. The process developed in this study offers an alternative approach to sophisticated electrospinning for the synthesis of other fiber-like MO/carbon nanocomposites for versatile applications.
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Affiliation(s)
- Dingcheng Cen
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Yicheng Ding
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Run Wei
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Xi Huang
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Guohua Gao
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Guangming Wu
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Yongfeng Mei
- Department of Materials Science, Fudan University, Shanghai 200433, China
| | - Zhihao Bao
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
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16
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Effects of silver nanoparticle on electrochemical performances of poly(o-phenylenediamine)/Ag hybrid composite as anode of lithium-ion batteries. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04580-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Preparation of Microfibrillated Cellulose from Wood Pulp through Carbamate Modification and Colloid Milling. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10061977] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This paper studies a new convenient method to prepare microfibrillated cellulose from a bleached eucalyptus kraft pulp. First, the wood pulp was reacted with urea to produce cellulose carbamate (CC), and then the CC was treated with colloid mill in an acidic medium. A feasible preparation process for CC was to soak the pulp with the urea solution, and then the cellulose pulp was dewatered, dried, and reacted with urea at high temperatures above the melting point of urea. The Kjeldahl method, infrared spectroscopy, and solid 13C NMR were used to confirm the effectiveness of the reaction. On the basis of CC with the degree of substitution, DS = 0.123, the aqueous suspension with 2% content of CC at pH values of 1, 3, or 7 was severally ground by a colloid milling. After centrifugation, the nanocellulose carbamate fiber (CCNF) in the supernatant was obtained. X-ray diffraction showed that CC and CCNF had the same crystal form as the cellulose pulp, but the crystallinity decreased successively. The nanometer diameter of the CCNF fiber was observed with scanning electron microscopy. Results showed that when the pH value of the CC suspension decreased during the colloid milling, the crystallinity of the CCNF decreased along with the decrease of fiber diameter, and the zeta potential of the supernatant increased. This indicated that carbamate side groups of CC were protonated at low pHs and the cation repulsion between cellulose molecular chains enhanced the driving force of the pulp separation to CCNF. Interestingly, the thermal stability of CCNF is comparable to that of the original cellulose, and the enhancement effect of CCNF on starch can be clearly observed even at a relatively low loading of CCNF.
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18
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Surface-modified microcrystalline cellulose for reinforcement of chitosan film. Carbohydr Polym 2018; 201:367-373. [DOI: 10.1016/j.carbpol.2018.08.085] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 06/28/2018] [Accepted: 08/20/2018] [Indexed: 11/22/2022]
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19
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20
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Microwave Irradiation Assisted Preparation of Chitosan Composite Microsphere for Dye Adsorption. INT J POLYM SCI 2017. [DOI: 10.1155/2017/2672597] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Chitosan-activated carbon composite microspheres were prepared by emulsion cross-linking method and its adsorption properties for methyl orange were studied. Chitosan solution was mixed with activated carbon powder and then chitosan was cross-linked by epichlorohydrin under microwave irradiation. SEM photos show that the composite microspheres have diameters of 200–400 μm and activated carbon powder dispersed on the surface of composite microsphere. FTIR spectrum indicates chitosan is successfully cross-linked. Microwave irradiation can effectively shorten the cross-linking time. Composite microspheres have enhanced dye adsorption capacity for methyl orange compared to chitosan microspheres. Kinetic studies showed that the adsorption followed a pseudo-second-order model. Isotherm studies show that the isotherm adsorption equilibrium is better described by Freundlich isotherm. Regeneration results show that adsorption capacity of composite microsphere decreased about 5.51% after being reused for three times. These results indicated that chitosan-activated carbon composite microsphere has potential application in the removal of dye from wastewaters.
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21
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22
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Yu G, Teng Y, Lai W, Yin C. The preparation and study of cellulose carbamates and their regenerated membranes. Int J Biol Macromol 2016; 93:1155-1160. [PMID: 27667540 DOI: 10.1016/j.ijbiomac.2016.09.081] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 09/20/2016] [Indexed: 10/21/2022]
Abstract
Using wood pulps with the average degree of polymerization 300-350 and urea as raw materials, cellulose carbamates were successfully synthesized by esterification reaction in N, N-dimethylacetamide(DMAc), an inexpensive, high boiling aprotic and polar solvent, for the purpose of improving the solubility of cellulose, reducing costs and environmental pollution. The products were dissolved in 9% sodium hydroxide solution at a low temperature after washing and drying and the cellulose carbamates solutions were obtained. The solutions were uniformly casted on a glass support after degassing. The regenerated cellulose membranes (CMs) were prepared by immersing the support in coagulation bath for some minutes. The structures of cellulose carbamates were characterized by Fourier transform infrared spectroscopy (FT-IR), 13C solid state nuclear magnetic resonance spectrometry (13C NMR), Thermal gravimetric analysis(TG), Scanning electron microscopy (SEM) and X-ray diffractometry(XRD). The filtration performances of CMs were tested. The results reveal that part groups of cellulose were substituted by amino in the medium, the cellulose carbamates were prepared with the reducing crystallinity and thermal decomposition temperature. The CMs have good separation performance for methylene blue.
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Affiliation(s)
- Guomin Yu
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Material Science and Engineering, TianJin Polytechnic University, TianJin 300387, China
| | - Yun Teng
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Material Science and Engineering, TianJin Polytechnic University, TianJin 300387, China
| | - Weidong Lai
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Material Science and Engineering, TianJin Polytechnic University, TianJin 300387, China
| | - Cuiyu Yin
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Material Science and Engineering, TianJin Polytechnic University, TianJin 300387, China.
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23
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Synthesis of kenaf cellulose carbamate and its smart electric stimuli-response. Carbohydr Polym 2016; 137:693-700. [PMID: 26686181 DOI: 10.1016/j.carbpol.2015.11.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 11/11/2015] [Accepted: 11/14/2015] [Indexed: 11/20/2022]
Abstract
Cellulose carbamate (CC) was produced from kenaf core pulp (KCP) via a microwave reactor-assisted method. The formation of CC was confirmed by Fourier transform infrared spectroscopy and nitrogen content analysis. The degree of substitution, zeta potential and size distribution of CC were also determined. The CC was characterized with scanning electron microscopy, X-ray diffraction and thermogravimetry analysis. The CC particles were then dispersed in silicone oil to prepare CC-based anhydrous electric stimuli-responsive electrorheological (ER) fluids. Rhelogical measurement was carried out using rotational rheometer with a high voltage generator in both steady and oscillatory shear modes to examine the effect of electric field strength on the ER characteristics. The results showed that the increase in electric field strength has enhanced the ER properties of CC-based ER fluid due to the chain formation induced by electric polarization among the particles.
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24
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Meng C, Lu H, Cao GP, Yao CW, Liu Y, Zhang QM, Bai YB, Wang H. Activation of Cellulose by Supercritical Tetrafluoroethane and Its Application in Synthesis of Cellulose Acetate. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b03418] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Chen Meng
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hui Lu
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Gui-Ping Cao
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chen-Wei Yao
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yue Liu
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Qi-Ming Zhang
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yun-Bo Bai
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hua Wang
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
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25
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Tang E, Du K, Feng X, Yuan M, Liu S, Zhao D. Controlled synthesis of cellulose-graft-poly[2-(diethylamino)-ethyl methacrylate] by ATRP in ionic liquid [AMIM]Cl and its pH-responsive property. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.01.041] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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26
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Fu F, Li L, Liu L, Cai J, Zhang Y, Zhou J, Zhang L. Construction of cellulose based ZnO nanocomposite films with antibacterial properties through one-step coagulation. ACS APPLIED MATERIALS & INTERFACES 2015; 7:2597-606. [PMID: 25569533 DOI: 10.1021/am507639b] [Citation(s) in RCA: 134] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Cellulose based ZnO nanocomposite (RCZ) films were prepared from cellulose carbamate-NaOH/ZnO solutions through one-step coagulation in Na2SO4 aqueous solutions. The structure and properties of RCZ films were characterized using XRD, FTIR, XPS, SEM, TEM, TG, tensile testing, and antibacterial activity tests. The content of ZnO in RCZ films was obtained in the range of 2.7-15.1 wt %. ZnO nanoparticles with a hexagonal wurtzite structure agglomerated into large particles, which firmly embedded in the cellulose matrix. RCZ films displayed good mechanical properties and high thermal stability. Moreover, the films exhibited excellent UV-blocking properties and antibacterial activities against Staphylococcus aureus and Escherichia coli. A dramatic reduction in viable bacteria was observed within 3 h of exposure, while all of the bacteria were killed within 6 h. This work provided a novel and simple pathway for the preparation of regenerated cellulose films with ZnO nanoparticles for application as functional biomaterials.
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Affiliation(s)
- Feiya Fu
- Department of Chemistry and Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University , Luojia Hill, Wuhan 430072, China
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27
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Labafzadeh SR, Kavakka JS, Vyavaharkar K, Sievänen K, Kilpeläinen I. Preparation of cellulose and pulp carbamates through a reactive dissolution approach. RSC Adv 2014. [DOI: 10.1039/c4ra02316a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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28
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Hu H, Zhang Y, Liu X, Huang Z, Chen Y, Yang M, Qin X, Feng Z. Structural changes and enhanced accessibility of natural cellulose pretreated by mechanical activation. Polym Bull (Berl) 2013. [DOI: 10.1007/s00289-013-1070-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Cao X, Peng P, Sun S, Li M, Sun R. Fractionation of Lignocellulosic Materials for the Biorefinery: Separation and Characterization of Lignin fromCalamagrostis angustifoliaKom. SEP SCI TECHNOL 2013. [DOI: 10.1080/01496395.2012.724499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Huang Z, Tan Y, Zhang Y, Liu X, Hu H, Qin Y, Huang H. Direct production of cellulose laurate by mechanical activation-strengthened solid phase synthesis. BIORESOURCE TECHNOLOGY 2012; 118:624-627. [PMID: 22683327 DOI: 10.1016/j.biortech.2012.05.082] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2012] [Revised: 05/15/2012] [Accepted: 05/17/2012] [Indexed: 06/01/2023]
Abstract
This work reports that cellulose laurate could be directly produced by mechanical activation-strengthened solid phase synthesis (MASPS) in a customized stirring mill with using bagasse pulp and lauric acid as materials in an environmentally friendly way. Cellulose laurates with different degree of substitution were obtained under different synthesis conditions without the use of organic co-reagents and solvents. The characterization results showed that cellulose laurates had great changes in surface morphologies and crystal structures compared with bagasse pulp because of the intense milling and introduction of laurate groups, but still retained the cellulose I crystalline form of the native cellulose. MASPS could be considered as a simple, efficient and green method for the production of long chain cellulose esters.
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Affiliation(s)
- Zuqiang Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
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31
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Huang X, Jiang X, Zhuo R. Microwave-assisted solid-phase synthesis of pH-responsive polyaspartamide derivatives. Carbohydr Polym 2012; 89:788-94. [DOI: 10.1016/j.carbpol.2012.04.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 04/03/2012] [Accepted: 04/05/2012] [Indexed: 11/25/2022]
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32
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Effect of urea additive on the thermal decomposition of greige cotton nonwoven fabric treated with diammonium phosphate. Polym Degrad Stab 2011. [DOI: 10.1016/j.polymdegradstab.2011.08.014] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Rose M, Palkovits R. Cellulose-Based Sustainable Polymers: State of the Art and Future Trends. Macromol Rapid Commun 2011; 32:1299-311. [DOI: 10.1002/marc.201100230] [Citation(s) in RCA: 138] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Indexed: 11/06/2022]
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34
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Guo Y, Zhou J, Zhang L. Dynamic Viscoelastic Properties of Cellulose Carbamate Dissolved in NaOH Aqueous Solution. Biomacromolecules 2011; 12:1927-34. [DOI: 10.1021/bm200331g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yi Guo
- Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Jinping Zhou
- Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Lina Zhang
- Department of Chemistry, Wuhan University, Wuhan 430072, China
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35
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One Decade of Microwave-Assisted Polymerizations: Quo vadis? Macromol Rapid Commun 2011; 32:254-88. [DOI: 10.1002/marc.201000539] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2010] [Indexed: 11/07/2022]
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36
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Functionalisation of cellulosic substrates by a facile solventless method of introducing carbamate groups. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.06.052] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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