1
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Mou H, Wu T, Wu X, Zhang H, Ji X, Fan H, Song H. Improvement of interface bonding of bacterial cellulose reinforced aged paper by amino-silanization. Int J Biol Macromol 2024; 275:133130. [PMID: 38945703 DOI: 10.1016/j.ijbiomac.2024.133130] [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: 03/21/2024] [Revised: 06/04/2024] [Accepted: 06/11/2024] [Indexed: 07/02/2024]
Abstract
The aging of paper seriously threatens the service life of cultural heritage documents. Bacterial cellulose (BC), which has a good fiber aspect ratio and is rich in hydroxyl groups, is suitable for strengthening aged paper. However, a single BC added was not ideal for paper restoration, since only strengthening was not able to resist the persistent acidification of ancient book. In this work, BC was functionalized by 3-aminopropyltriethoxysilane (APTES) to develop the interface bonding with aged paper. Fourier transform infrared (FTIR), X-ray diffraction (XRD), nuclear magnetic resonance (NMR) and elemental analysis identified the successful amino-silanization of BC. The modification parameters were optimized as the concentration of APTES of 5 wt%, the reaction time of 4 h, and the reaction temperature of 80 °C based on a considerable improvement in the strength properties without obvious appearance impact on reinforced papers. Moreover, the pH value of the repaired paper was achieved at 8.03, ensuring the stability of the anti-aging effect. The results confirmed that APTES-BC had great potential applications in ancient books conservation.
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Affiliation(s)
- Hongyan Mou
- State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University and Technology, Guangzhou 510640, China.
| | - Ting Wu
- State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University and Technology, Guangzhou 510640, China
| | - Xiao Wu
- State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University and Technology, Guangzhou 510640, China.
| | - Hongjie Zhang
- National Engineering Lab for Pulp and Paper, China National Pulp and Paper Research Institute Co., Ltd, Beijing 100102, China
| | - Xingxiang Ji
- Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Huiming Fan
- State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University and Technology, Guangzhou 510640, China
| | - Helong Song
- Department of the Built Environment, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands
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2
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Ludovici F, Hartmann R, Rudolph M, Liimatainen H. Thiol-Silylated Cellulose Nanocrystals as Selective Biodepressants in Froth Flotation. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2023; 11:16176-16184. [PMID: 38022739 PMCID: PMC10647933 DOI: 10.1021/acssuschemeng.3c04013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/17/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023]
Abstract
The extraction of various minerals is commonly conducted through froth flotation, which is a versatile separation method in mineral processing. In froth flotation, depressants are employed to improve the flotation selectivity by modifying the wettability of the minerals and reducing their natural or induced floatability. However, the environmental impact of many current flotation chemicals poses a challenge to the sustainability and selectivity of the ore beneficiation processes. To mitigate this issue, cellulose, particularly nanocelluloses, has been explored as a potential alternative to promote sustainable mineral processing. This study focused on silylated cellulose nanocrystals (CNCs) as biodepressants for sulfide minerals in froth flotation. CNCs containing thiol silane groups or bifunctional CNCs containing both thiol and propyl silanes were synthesized using an aqueous silylation reaction, and their performance in the flotation of chalcopyrite and pyrite was investigated in the presence of a sodium isobutyl xanthate collector. The results showed that the modified CNCs exhibited preferential interaction between chalcopyrite, and the flotation recovery of chalcopyrite decreased from ∼76% to ∼24% in the presence of thiol-grafted CNCs at pH 6, while the pyrite recovery decreased only from ∼82% to ∼75%, indicating the efficient selectivity of thiol-silylated CNCs toward chalcopyrite depression.
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Affiliation(s)
- Feliciana Ludovici
- Fiber
and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014 Oulu, Finland
| | - Robert Hartmann
- Fraunhofer
Center for Chemical-Biotechnological Processes, 06237 Leuna, Germany
| | - Martin Rudolph
- Helmholtz-Zentrum-Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, 09599 Freiberg, Germany
| | - Henrikki Liimatainen
- Fiber
and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014 Oulu, Finland
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3
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Yadav C, Lee JM, Mohanty P, Li X, Jang WD. Graft onto approaches for nanocellulose-based advanced functional materials. NANOSCALE 2023; 15:15108-15145. [PMID: 37712254 DOI: 10.1039/d3nr03087c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
The resurgence of cellulose as nano-dimensional 'nanocellulose' has unlocked a sustainable bioeconomy for the development of advanced functional biomaterials. Bestowed with multifunctional attributes, such as renewability and abundance of its source, biodegradability, biocompatibility, superior mechanical, optical, and rheological properties, tunable self-assembly and surface chemistry, nanocellulose presents exclusive opportunities for a wide range of novel applications. However, to alleviate its intrinsic hydrophilicity-related constraints surface functionalization is inevitably needed to foster various targeted applications. The abundant surface hydroxyl groups on nanocellulose offer opportunities for grafting small molecules or macromolecular entities using either a 'graft onto' or 'graft from' approach, resulting in materials with distinctive functionalities. Most of the reviews published to date extensively discussed 'graft from' modification approaches, however 'graft onto' approaches are not well discussed. Hence, this review aims to provide a comprehensive summary of 'graft onto' approaches. Furthermore, insight into some of the recently emerging applications of this grafted nanocellulose including advanced nanocomposite formulation, stimuli-responsive materials, bioimaging, sensing, biomedicine, packaging, and wastewater treatment has also been reviewed.
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Affiliation(s)
- Chandravati Yadav
- Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, 03722 Seoul, Republic of Korea.
| | - Jeong-Min Lee
- Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, 03722 Seoul, Republic of Korea.
| | - Paritosh Mohanty
- Functional Materials Laboratory, Department of Chemistry, IIT Roorkee, Roorkee 247667, Uttarakhand, India
| | - Xinping Li
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi 710021, PR China
| | - Woo-Dong Jang
- Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, 03722 Seoul, Republic of Korea.
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4
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Chang L, Wang Y, Chen X, Ren Y, Luo X. Effect of Grafting Conditions on the Interfacial Properties of Silane Modified Wood Veneer/PE Film Plywood. Polymers (Basel) 2023; 15:2957. [PMID: 37447602 DOI: 10.3390/polym15132957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/01/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
In order to elucidate the importance of grafting in the compatibilization process of silane coupling agents, poplar veneer was treated with silane coupling agents and grafted under different heating conditions. The treated veneers were used composited with PE film to prepare different plywood samples. XPS and WCA were used to analyze the effect of grafting conditions on the surface properties of the silane-treated veneer. The results showed that free silanols can physically be adsorbed onto all silane-treated veneer surfaces, forming hydrogen-Si-O-Si- bonds and therefore increasing the water contact angle. Only under heating conditions could the -Si-O-Si- be converted into covalent -Si-O-C- bonds, which helped to improve the bonding strength. When silane-treated veneer was grafted at 120 °C for 90 min, the tensile shear strength of plywood reached 1.03 MPa, meeting the requirements of GB/T 9846.3-2004 for outdoor materials. Enhanced interlock between silane-modified veneer and PE film was observed under the optimal grafting condition by SEM. The better interface structure allowed improvement of thermal stability. DMA results showed that the retention rate in storage modulus at 130 °C was 60% for the grafted sample, while the retention rate for the ungrafted sample was only 31%.
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Affiliation(s)
- Liang Chang
- Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
| | - Yuanwu Wang
- Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
| | - Xueqi Chen
- Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
| | - Yiping Ren
- Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
| | - Xiaoxi Luo
- Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
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Indumathy B, Sathiyanathan P, Prasad G, Reza MS, Prabu AA, Kim H. A Comprehensive Review on Processing, Development and Applications of Organofunctional Silanes and Silane-Based Hyperbranched Polymers. Polymers (Basel) 2023; 15:polym15112517. [PMID: 37299316 DOI: 10.3390/polym15112517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/04/2023] [Accepted: 05/12/2023] [Indexed: 06/12/2023] Open
Abstract
Since the last decade, hyperbranched polymers (HBPs) have gained wider theoretical interest and practical applications in sensor technology due to their ease of synthesis, highly branched structure but dimensions within nanoscale, a larger number of modified terminal groups and lowering of viscosity in polymer blends even at higher HBP concentrations. Many researchers have reported the synthesis of HBPs using different organic-based core-shell moieties. Interestingly, silanes, as organic-inorganic hybrid modifiers of HBP, are of great interest as they resulted in a tremendous improvement in HBP properties like increasing thermal, mechanical and electrical properties compared to that of organic-only moieties. This review focuses on the research progress in organofunctional silanes, silane-based HBPs and their applications since the last decade. The effect of silane type, its bi-functional nature, its influence on the final HBP structure and the resultant properties are covered in detail. Methods to enhance the HBP properties and challenges that need to be overcome in the near future are also discussed.
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Affiliation(s)
- Balaraman Indumathy
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632 014, Tamil Nadu, India
| | - Ponnan Sathiyanathan
- Department of Advanced Materials Engineering for Information & Electronics, College of Engineering, Kyung Hee University, Yongin-si 17104, Republic of Korea
| | - Gajula Prasad
- School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education, 1600, Cheonan-si 31253, Republic of Korea
| | - Mohammad Shamim Reza
- Department of Advanced Materials Engineering for Information & Electronics, College of Engineering, Kyung Hee University, Yongin-si 17104, Republic of Korea
| | - Arun Anand Prabu
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632 014, Tamil Nadu, India
| | - Hongdoo Kim
- Department of Advanced Materials Engineering for Information & Electronics, College of Engineering, Kyung Hee University, Yongin-si 17104, Republic of Korea
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6
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Effect of Wax Additives and Silanization of Diatom Surfaces on Thermomechanical Properties of Polylactide Composites. Polymers (Basel) 2022; 14:polym14245511. [PMID: 36559878 PMCID: PMC9784152 DOI: 10.3390/polym14245511] [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: 10/24/2022] [Revised: 12/02/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022] Open
Abstract
In the present study, tests were conducted on high-filled composite samples on a polylactide matrix, modified with diatomaceous earth, three types of silanes, and natural and synthetic wax. The obtained samples were characterized in terms of the effect of modifications on mechanical properties (tensile strength, flexural strength, and impact resistance) or processing properties, e.g., melt flow rate (MFR). The study showed that the modification had a favorable effect on the processing properties of the composites, associated with up to an eight-fold increase in flow rate index compared with the reference sample, especially for samples treated with methyltrimethoxysilane (MTMOS), and up to a ten-fold increase under low shear-rate flow conditions. The effect of the addition of waxes of different origins (synthetic and natural) was also determined, and it was shown that beeswax tended to reduce the flow rate of the composites regardless of the silane used. The addition of synthetic wax to composites increased the tendency to agglomerate diatomaceous earth, while natural wax had a positive effect on filler dispersion.
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7
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Zielińska D, Skrzypczak A, Peplińska B, Borysiak S. Nanocellulose-Based Polymer Composites Functionalized with New Gemini Ionic Liquids. Int J Mol Sci 2022; 23:15807. [PMID: 36555444 PMCID: PMC9784869 DOI: 10.3390/ijms232415807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/06/2022] [Accepted: 12/10/2022] [Indexed: 12/14/2022] Open
Abstract
The manuscript discusses the application of dimeric imidazolium ionic liquids with an aliphatic linker of different lengths, constituting a new class of compounds called gemini, for the modification of renewable materials. This innovative functionalization with the use of ionic liquids made it possible to obtain polymer composite nanomaterials with renewable fillers, which will reduce the consumption of petroleum-based raw materials and also be directly related to the reduction of energy intensity. Renewable filler in the form of nanocellulose modified with ionic liquids, as well as polymer composites with such filler obtained by extrusion and injection molding techniques, were subjected to detailed characterization using techniques like: X-ray diffraction (XRD), Fourier transform spectroscopy (FTIR), dispersion studies (DLS), morphological analysis (SEM), differential scanning calorimetry (DSC), hot-stage polarized light microscopy and characterization of mechanical properties. The use of innovative dimeric ionic liquids proved to be an effective method to carry out efficient functionalization of cellulose. This provided a stable space structure between polysaccharide particles, limiting aggregate formation. It was shown that chemical modification with ionic liquids has a significant effect on the nucleation activity of cellulose fillers and the formation of the supermolecular structure of the polymer matrix, which consequently allowed to obtain polymer composites with excellent strength characteristics and increased flexibility, which will allow to increase their application potential. Innovative ionic liquids have contributed to obtaining green nanomaterials with excellent functional properties, which have not been described in the literature so far.
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Affiliation(s)
- Daria Zielińska
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland
| | - Andrzej Skrzypczak
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland
| | - Barbara Peplińska
- NanoBioMedical Centre, Adam Mickiewicz University, PL-61614 Poznan, Poland
| | - Sławomir Borysiak
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland
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8
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Sources, Chemical Functionalization, and Commercial Applications of Nanocellulose and Nanocellulose-Based Composites: A Review. Polymers (Basel) 2022; 14:polym14214468. [PMID: 36365462 PMCID: PMC9658553 DOI: 10.3390/polym14214468] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/14/2022] [Accepted: 10/19/2022] [Indexed: 11/25/2022] Open
Abstract
Nanocellulose is the most abundant material extracted from plants, animals, and bacteria. Nanocellulose is a cellulosic material with nano-scale dimensions and exists in the form of cellulose nanocrystals (CNC), bacterial nanocellulose (BNC), and nano-fibrillated cellulose (NFC). Owing to its high surface area, non-toxic nature, good mechanical properties, low thermal expansion, and high biodegradability, it is obtaining high attraction in the fields of electronics, paper making, packaging, and filtration, as well as the biomedical industry. To obtain the full potential of nanocellulose, it is chemically modified to alter the surface, resulting in improved properties. This review covers the nanocellulose background, their extraction methods, and possible chemical treatments that can enhance the properties of nanocellulose and its composites, as well as their applications in various fields.
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9
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Reactivity of Waterlogged Archeological Elm Wood with Organosilicon Compounds Applied as Wood Consolidants: 2D 1H- 13C Solution-State NMR Studies. Molecules 2022; 27:molecules27113407. [PMID: 35684343 PMCID: PMC9181845 DOI: 10.3390/molecules27113407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 12/02/2022] Open
Abstract
Some organosilicon compounds, including alkoxysilanes and siloxanes, proved effective in stabilizing the dimensions of waterlogged archaeological wood during drying, which is essential in the conservation process of ancient artifacts. However, it was difficult to determine a strong correlation between the wood stabilizing effect and the properties of organosilicon compounds, such as molecular weight and size, weight percent gain, and the presence of other potentially reactive groups. Therefore, to better understand the mechanism behind the stabilization effectiveness, the reactivity of organosilicons with wood polymers was studied using a 2D 1H–13C solution-state NMR technique. The results showed an extensive modification of lignin through its demethoxylation and decarbonylation and also the absence of the native cellulose anomeric peak in siloxane-treated wood. The most substantial reactivity between wood polymers and organosilicon was observed with the (3-mercaptopropyl)trimethoxysilane treatment, showing complete removal of lignin side chains, the lowest syringyl/guaiacyl ratio, depolymerization of cellulose and xylan, and reactivity with the C6 primary hydroxyls in cellulose. This may explain the outstanding stabilizing effectiveness of this silane and supports the conclusion that extensive chemical interactions are essential in this process. It also indicates the vital role of a mercapto group in wood stabilization by organosilicons. This 2D NMR technique sheds new light on the chemical mechanisms involved in organosilicon consolidation of wood and reveals what chemical characteristics are essential in developing future conservation treatments.
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10
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Zezhong J, Haiyue W, Rongrong Z, Kun L, Qiao Z, Lei H, Liying G. Preparation and Catalytic Performance of Supramolecular Ionic Liquid Catalyst. RUSS J APPL CHEM+ 2022. [DOI: 10.1134/s1070427222030132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Dhali K, Daver F, Cass P, Adhikari B. Surface modification of the cellulose nanocrystals through vinyl silane grafting. Int J Biol Macromol 2022; 200:397-408. [PMID: 35041891 DOI: 10.1016/j.ijbiomac.2022.01.079] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 12/16/2021] [Accepted: 01/12/2022] [Indexed: 01/14/2023]
Abstract
Incompatibility of nanocellulose with non-polar polymer matrices disrupts the interfacial interaction and results in aggregation and phase separation. In this study a facile and environmentally friendly method was used to partially substitute the surface hydroxyl groups by attaching polysiloxane to impart hydrophobic properties. The silanization reaction proceeded with hydrolysis of triethoxyvinylsilane (TEVS) into reactive silanols followed by condensation to form the branched polymer. These polysiloxane oligomers were chemically grafted to form alkoxy silane bonds on the surface of CNCs. A suitable degree of hydrophilic-hydrophobic balance of the modified CNCs was achieved which improved their dispersion in hydrophobic matrix poly(butylene adipate-co-terephthalate) (PBAT). FTIR, NMR (13C and 29Si) and XPS demonstrated successful surface chemical modification and confirmed extent of silanization as a function of silane concentration. XRD showed successful grafting of the vinyl silane agent and confirmed polymorph structure of the nanocellulose was retained. The results from TEM and AFM demonstrated successful coating of nano whiskers at 5 wt% silane loading. The successful grafting of the silane agent with pendant vinyl groups improved surface hydrophobicity. These results show that this facile method produces adequately surface modified CNC which can be used as filler in hydrophobic matrices of bioplastics.
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Affiliation(s)
- Kingshuk Dhali
- School of Science, STEM College, RMIT University, Bundoora, VIC 3083, Australia; Department of Post-Harvest Engineering, Faculty of Agricultural Engineering, Bidhan Chandra Krishi Viswavidyalaya, Nadia, W.B., India.
| | - Fugen Daver
- School of Engineering, STEM College, RMIT University, Bundoora, VIC 3083, Australia
| | - Peter Cass
- Manufacturing, Commonwealth Scientific and Industrial Research Organization (CSIRO), Clayton, VIC 3168, Australia
| | - Benu Adhikari
- School of Science, STEM College, RMIT University, Bundoora, VIC 3083, Australia.
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12
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Nhi TTY, Cong TD, Hop TTT, Hai LN, Huu NT, Tung NT. Surface Modification of Cellulose Microfibrils with Silane Agent for Eco-Friendly Hydrophobic Coatings. RUSS J APPL CHEM+ 2022. [DOI: 10.1134/s1070427222030065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Surface Modification of Commingled Flax/PP and Flax/PLA Fibres by Silane or Atmospheric Argon Plasma Exposure to Improve Fibre–Matrix Adhesion in Composites. FIBERS 2021. [DOI: 10.3390/fib10010002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Challenges faced by natural fibre-reinforced composites include poor compatibility between hydrophilic fibres such as flax and hydrophobic polymeric matrices such as polypropylene (PP) or poly(lactic acid) (PLA), and their inherent flammability. The former promotes weak interfacial adhesion between fibre and matrix, which may be further compromised by the addition of a flame retardant. This paper investigates the effect that the added flame retardant (FR), guanylurea methylphosphonate (GUP) and selected surface treatments of commingled flax and either PP or PLA fabrics have on the fibre/matrix interfacial cohesive forces in derived composites. Surface treatments included silanisation and atmospheric plasma flame exposure undertaken both individually and in sequence. 1-, 2- and 8-layered composite laminates were examined for their tensile, peeling and flexural properties, respectively, all of which yield measures of fibre-matrix cohesion. For FR-treated Flax/PP composites, maximum improvement was obtained with the combination of silane (using vinyltriethoxysilane) and plasma (150 W) treatments, with the highest peeling strength and flexural properties. However, for FR-treated Flax/PLA composites, maximum improvement in both properties occurred following 150 W plasma exposure only. The improvements in physical properties were matched by increased fibre-matrix adhesion as shown in SEM images of fractured laminates in which fibre-pullout had been eliminated.
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14
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Lee JT, Wyatt BC, Davis GA, Masterson AN, Pagan AL, Shah A, Anasori B, Sardar R. Covalent Surface Modification of Ti 3C 2T x MXene with Chemically Active Polymeric Ligands Producing Highly Conductive and Ordered Microstructure Films. ACS NANO 2021; 15:19600-19612. [PMID: 34786933 DOI: 10.1021/acsnano.1c06670] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
As interest continues to grow in Ti3C2Tx and other related MXenes, advancement in methods of manipulation of their surface functional groups beyond synthesis-based surface terminations (Tx: -F, -OH, and ═O) can provide mechanisms to enhance solution processability as well as produce improved solid-state device architectures and coatings. Here, we report a chemically important surface modification approach in which "solvent-like" polymers, polyethylene glycol carboxylic acid (PEG6-COOH), are covalently attached onto MXenes via esterification chemistry. Surface modification of Ti3C2Tx with PEG6-COOH with large ligand loading (up to 14% by mass) greatly enhances dispersibility in a wide range of nonpolar organic solvents (e.g., 2.88 mg/mL in chloroform) without oxidation of Ti3C2Tx two-dimensional flakes or changes in the structure ordering. Furthermore, cooperative interactions between polymer chains improve the nanoscale assembly of uniform microstructures of stacked MXene-PEG6 flakes into ordered thin films with excellent electrical conductivity (∼16,200 S·cm-1). Most importantly, our covalent surface modification approach with ω-functionalized PEG6 ligands (ω-PEG6-COOH, where ω: -NH2, -N3, -CH═CH2) allows for control over the degree of functionalization (incorporation of valency) of MXene. We believe that installing valency onto MXenes through short, ion conducting PEG ligands without compromising MXenes' features such as solution processability, structural stability, and electrical conductivity further enhance MXenes surface chemistry tunability and performance and widens their applications.
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Affiliation(s)
- Jacob T Lee
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - Brian C Wyatt
- Department of Mechanical and Energy Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - Gregory A Davis
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - Adrianna N Masterson
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - Amber L Pagan
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - Archit Shah
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - Babak Anasori
- Department of Mechanical and Energy Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
- Integrated Nanosystems Development Institute, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - Rajesh Sardar
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
- Integrated Nanosystems Development Institute, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
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15
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Yu J, Wang W, Li S, Yu B, Chen H, Wang Y. Synthesis of substrate-bound seaweed-like Au nanowires with amino silane coupling agents. Chem Commun (Camb) 2021; 58:989-992. [PMID: 34935793 DOI: 10.1039/d1cc05081h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A seedless method has been developed to synthesize seaweed-like Au nanowires on a Au substrate. The amino silane coupling agent 3-aminopropyltriethoxysilane was employed to form the active surfaces that facilitate the one dimensional growth. The growth mechanism and controlling parameters were investigated. Furthermore, the compatibility of this synthesis with a colloidal Au substrate was also demonstrated.
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Affiliation(s)
- Jialong Yu
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Centre for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Weiyu Wang
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Centre for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Shumin Li
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Centre for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Beibei Yu
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Centre for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Hongyu Chen
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Centre for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China. .,School of Science, Westlake University, 310064, P. R. China, Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310064, P. R. China
| | - Yawen Wang
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Centre for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China.
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16
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Khong C, Chia M, Ahmad I, Phang S. Chemical treatment of grafted rubber‐based conductive polymer film for homogeneity improvement. J Appl Polym Sci 2021. [DOI: 10.1002/app.51455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Choy‐Hung Khong
- Department of Physical Science, Faculty of Applied Sciences Tunku Abdul Rahman University College Kuala Lumpur Malaysia
| | - Min‐Rui Chia
- Polymer Research Centre (PORCE), Department of Chemical Sciences, Faculty of Science and Technology Universiti Kebangsaan Malaysia Bangi Malaysia
| | - Ishak Ahmad
- Polymer Research Centre (PORCE), Department of Chemical Sciences, Faculty of Science and Technology Universiti Kebangsaan Malaysia Bangi Malaysia
| | - Sook‐Wai Phang
- Department of Physical Science, Faculty of Applied Sciences Tunku Abdul Rahman University College Kuala Lumpur Malaysia
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17
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Guo Z, Zhang K, Guan H, Liu M, Yu S, Gao C. Improved separation efficiency of polyamide-based composite nanofiltration membrane by surface modification using 3-aminopropyltriethoxysilane. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119142] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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18
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Oberlintner A, Likozar B, Novak U. Hydrophobic functionalization reactions of structured cellulose nanomaterials: Mechanisms, kinetics and in silico multi-scale models. Carbohydr Polym 2021; 259:117742. [PMID: 33674002 DOI: 10.1016/j.carbpol.2021.117742] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 01/26/2021] [Accepted: 01/27/2021] [Indexed: 12/12/2022]
Abstract
Nanoscale-interfaced cellulose nanomaterials are extracted from polysaccharides, which are widely available in nature, biocompatible and biodegradable. Moreover, the latter have a potential to be recycled, upcycled, and formulate therefore a great theoretical predisposition to be used in a number of applications. Nanocrystals, nano-fibrils and nanofibers possess reactive functional groups that enable hydrophobic surface modifications. Analysed literature data, concerning mechanisms, pathways and kinetics, was screened, compared and assessed with regard to the demand of a catalyst, different measurement conditions and added molecule reactions. There is presently only a scarce technique description for carbonOH bond functionalization, considering the elementary chemical steps, sequences and intermediates of these (non)catalytic transformations. The overview of the prevailing basic research together with in silico modelling approach methodology gives us a deeper physical understanding of processes. Finally, to further highlight the applicability of such raw materials, the review of the development in several multidisciplinary fields was presented.
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Affiliation(s)
- Ana Oberlintner
- Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia; Jožef Stefan International Postgraduate School, Jamova Cesta 39, 1000 Ljubljana, Slovenia.
| | - Blaž Likozar
- Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia; Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna Pot 113, SI-1000, Ljubljana, Slovenia.
| | - Uroš Novak
- Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia.
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19
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Cabrera IC, Berlioz S, Fahs A, Louarn G, Carriere P. Chemical functionalization of nano fibrillated cellulose by glycidyl silane coupling agents: A grafted silane network characterization study. Int J Biol Macromol 2020; 165:1773-1782. [PMID: 33075339 DOI: 10.1016/j.ijbiomac.2020.10.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/29/2020] [Accepted: 10/06/2020] [Indexed: 11/19/2022]
Abstract
Nano fibrillated cellulose (NFC) has turned into a material widely studied due to its desirable performance for numerous organic systems. Nevertheless, its surface is not very compatible with most organic systems; hence, chemical functionalization methods offer a path to solve this problem. In this study, NFC is successfully functionalized with two silane coupling agents: 3-glycidyloxypropyl trimethoxysilane (GPS) and 3-glycidyloxypropyl dimethylethoxysilane (GPMES) by a simple, direct, and environmentally friendly method. Different analyses have been carried out in order to confirm the chemical modification of NFC. ATR-IR, XPS, and 29Si NMR spectroscopies confirmed the chemical modification that allowed the understanding of the structure and the conformation onto the modified NFC surface. SEM and AFM microscopies were performed to study possible alterations in morphology; a slight change was observed. Thermal properties were also analyzed by TGA analysis. It remains stable after chemical functionalization. Grafted NFC showed good performance compared to the pristine one. It allows a better dispersion into organic systems improving their properties.
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Affiliation(s)
- Isis Castro Cabrera
- Université de Toulon, Laboratoire MAtériaux, Polymères, Interfaces et Environnement Marin (MAPIEM), CS 60584, 83 041 Toulon Cedex 9, France
| | - Sophie Berlioz
- Université de Toulon, Laboratoire MAtériaux, Polymères, Interfaces et Environnement Marin (MAPIEM), CS 60584, 83 041 Toulon Cedex 9, France
| | - Armand Fahs
- Université de Toulon, Laboratoire MAtériaux, Polymères, Interfaces et Environnement Marin (MAPIEM), CS 60584, 83 041 Toulon Cedex 9, France
| | - Guy Louarn
- Université de Nantes, CNRS, Institut des Matériaux Jean Rouxel, IMN, 2 Rue de la Houssinière, 44 000 Nantes, France
| | - Pascal Carriere
- Université de Toulon, Laboratoire MAtériaux, Polymères, Interfaces et Environnement Marin (MAPIEM), CS 60584, 83 041 Toulon Cedex 9, France.
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20
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Chemical Modification of Cellulose Microfibres to Reinforce Poly(methyl methacrylate) Used for Dental Application. MATERIALS 2020; 13:ma13173807. [PMID: 32872190 PMCID: PMC7503994 DOI: 10.3390/ma13173807] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/24/2020] [Accepted: 08/26/2020] [Indexed: 11/16/2022]
Abstract
The mechanical properties of dental acrylic resins have to be improved in the case of a thin denture plate. This can be achieved by cellulose addition, playing the role of active filler. But to provide the excellent dispersion of cellulose microfibres within the hydrophobic polymer matrix, its surface has to be modified. Cellulose microfibres with average length from 8 to 30 μm were modified with octyltriethoxysilane and (3-methacryloxypropyl)methyldimethoxysilane. The latter also participated in the polymerisation reaction of methyl methacrylate. Dental composites were prepared following the general procedure provided by the supplier. The successful modification of the microfibres led to the improved compatibility of the cellulose and poly(methyl methacrylate). The fibres after modification were uniformly distributed within the matrix, resulting in the improved mechanical performance of obtained materials. Cellulose microfibres are good candidates for the dental materials to be used as the active filler. The simple and straightforward approach for the cellulose modifications with silanes provides good potential for its future practical application.
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21
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Kamel R, El-Wakil NA, Dufresne A, Elkasabgy NA. Nanocellulose: From an agricultural waste to a valuable pharmaceutical ingredient. Int J Biol Macromol 2020; 163:1579-1590. [PMID: 32755697 DOI: 10.1016/j.ijbiomac.2020.07.242] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 07/10/2020] [Accepted: 07/22/2020] [Indexed: 01/02/2023]
Abstract
Cellulose was and still is the most abundant biopolymer generated from all plant fibers including agricultural wastes. Using this waste as a starting material in the production of new products is a field of great interest. The demand for renewable and available resources in combination with advanced technologies is a necessity to develop new generations of advanced nanomaterials. This review aims to present integrated details on the extraction techniques and structure of nanofibrillated cellulose as well as cellulose nanocrystals derived from agricultural wastes besides the different treatment methods used to be suitable for several pharmaceutical applications. Different pharmaceutical applications are described, including controlled, sustained or rapid drug delivery, stabilizing agent, and its use as safe and sustained environment for cell culture allowing its use in tissue engineering field.
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Affiliation(s)
- Rabab Kamel
- Pharmaceutical Technology Department, National Research Centre, Cairo 12622, Egypt
| | - Nahla A El-Wakil
- Cellulose and Paper Department, National Research Centre, Cairo 12622, Egypt
| | - Alain Dufresne
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000 Grenoble, France
| | - Nermeen A Elkasabgy
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo 11562, Egypt..
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22
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Lucia A, Bacher M, van Herwijnen HWG, Rosenau T. A Direct Silanization Protocol for Dialdehyde Cellulose. Molecules 2020; 25:E2458. [PMID: 32466232 PMCID: PMC7287999 DOI: 10.3390/molecules25102458] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 05/20/2020] [Accepted: 05/22/2020] [Indexed: 02/02/2023] Open
Abstract
Cellulose derivatives have many potential applications in the field of biomaterials and composites, in addition to several ways of modification leading to them. Silanization in aqueous media is one of the most promising routes to create multipurpose and organic-inorganic hybrid materials. Silanization has been widely used for cellulosic and nano-structured celluloses, but was a problem so far if to be applied to the common cellulose derivative "dialdehyde cellulose" (DAC), i.e., highly periodate-oxidized celluloses. In this work, a straightforward silanization protocol for dialdehyde cellulose is proposed, which can be readily modified with (3-aminopropyl)triethoxysilane. After thermal treatment and freeze-drying, the resulting product showed condensation and cross-linking, which was studied with infrared spectroscopy and 13C and 29Si solid-state nuclear magnetic resonance (NMR) spectroscopy. The cross-linking involves both links of the hydroxyl group of the oxidized cellulose with the silanol groups (Si-O-C) and imine-type bonds between the amino group and keto functions of the DAC (-HC=N-). The modification was achieved in aqueous medium under mild reaction conditions. Different treatments cause different levels of hydrolysis of the organosilane compound, which resulted in diverse condensed silica networks in the modified dialdehyde cellulose structure.
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Affiliation(s)
- Arianna Lucia
- Wood K Plus–Competence Center for Wood Composites and Wood Chemistry, Kompetenzzentrum Holz GmbH, Altenberger Straße 69, A-4040 Linz, Austria; (A.L.); (H.W.G.v.H.)
- Institute for Chemistry of Renewable Resources, University of Natural Resources and Life Science Vienna (BOKU), Konrad-Lorenz-Straße 24, A-3430 Tulln an der Donau, Austria;
| | - Markus Bacher
- Institute for Chemistry of Renewable Resources, University of Natural Resources and Life Science Vienna (BOKU), Konrad-Lorenz-Straße 24, A-3430 Tulln an der Donau, Austria;
| | - Hendrikus W. G. van Herwijnen
- Wood K Plus–Competence Center for Wood Composites and Wood Chemistry, Kompetenzzentrum Holz GmbH, Altenberger Straße 69, A-4040 Linz, Austria; (A.L.); (H.W.G.v.H.)
| | - Thomas Rosenau
- Institute for Chemistry of Renewable Resources, University of Natural Resources and Life Science Vienna (BOKU), Konrad-Lorenz-Straße 24, A-3430 Tulln an der Donau, Austria;
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Porthansgatan 3, FI-20500 Åbo/Turku, Finland
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23
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Barquero A, Agirre A, Barandiaran MJ, Leiza JR. Emulsion Copolymerization of Vinyl Acetate and Vinyl Silanes: Kinetics and Development of Microstructure. MACROMOL REACT ENG 2020. [DOI: 10.1002/mren.201900043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Aitor Barquero
- POLYMAT, Kimika Aplikatua Saila, Kimika FakultateaUniversidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU Joxe Mari Korta zentroa, Tolosa hiribidea, 72 20018 Donostia Spain
| | - Amaia Agirre
- POLYMAT, Kimika Aplikatua Saila, Kimika FakultateaUniversidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU Joxe Mari Korta zentroa, Tolosa hiribidea, 72 20018 Donostia Spain
| | - María Jesús Barandiaran
- POLYMAT, Kimika Aplikatua Saila, Kimika FakultateaUniversidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU Joxe Mari Korta zentroa, Tolosa hiribidea, 72 20018 Donostia Spain
| | - Jose Ramon Leiza
- POLYMAT, Kimika Aplikatua Saila, Kimika FakultateaUniversidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU Joxe Mari Korta zentroa, Tolosa hiribidea, 72 20018 Donostia Spain
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24
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Zhao X, Khandoker MAR, Golovin K. Non-Fluorinated Omniphobic Paper with Ultralow Contact Angle Hysteresis. ACS APPLIED MATERIALS & INTERFACES 2020; 12:15748-15756. [PMID: 32142254 DOI: 10.1021/acsami.0c01678] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Existing methods for fabricating oil-repellent paper rely on highly fluorinated and therefore toxic chemicals. Non-fluorinated omniphobic paper with low contact angle hysteresis (CAH) has not been demonstrated. We report a facile method to prepare omniphobic paper through the vapor-phase deposition of chlorosilane molecules to create "liquid-like" polymer brushes on commercially available release liners. Compared to polymer brushes grafted from solution, this solvent-free method avoided physical deformation of the paper, such as curling or wrinkling. The obtained paper displayed low CAH (<6°) and roll-off angles for liquids exhibiting a broad range of surface tension, from 72.8 to 22.4 mN m-1. A hexadecane droplet (15 μL, 27.5 mN m-1) slid off the paper at a tilt angle less than 4°. The effects of surface roughness, composition, and the presence of particle additives on the wetting properties were investigated. The utility of the omniphobic paper was demonstrated in microfluidic, oil funnel, microtiter plate, and food packaging container applications.
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Affiliation(s)
- Xiaoxiao Zhao
- Okanagan Polymer Engineering Research & Applications Laboratory, School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Md Arifur Rahman Khandoker
- Okanagan Polymer Engineering Research & Applications Laboratory, School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Kevin Golovin
- Okanagan Polymer Engineering Research & Applications Laboratory, School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
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25
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Xing M, Xie Q, Li X, Guan T, Wu D. Monolayers of an organosilane on magnetite nanoparticles for the fast removal of Cr(VI) from water. ENVIRONMENTAL TECHNOLOGY 2020; 41:658-668. [PMID: 30074861 DOI: 10.1080/09593330.2018.1508254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 07/28/2018] [Indexed: 06/08/2023]
Abstract
Monolayers of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane have been established on magnetite nanoparticles to develop a novel magnetic adsorbent for fast decontamination of hexavalent chromium (Cr(VI)) from water. Results indicated that monolayer adsorption of the silane from water took place at low concentrations (<300 mg/L) and around 100% surface coverage was obtained at temperatures ≥90°C. The hydrolysed silane was anchored to the magnetite surface through condensation reactions between its silanol groups and the surface hydroxyl groups of magnetite. The functional amine groups were protonated by acid treatment for adsorbing Cr(VI). The monolayer of the silane on magnetite (MSM) with approximately 100% surface coverage showed extremely rapid adsorption kinetics for Cr(VI), such that the process was complete within 1 min. This enables the treatment of large amounts of sewage per unit time. The adsorption capacity for Cr(VI) was 8.0 mg/g, as estimated from the Langmuir isotherm model. The saturation magnetization of the MSM reached 64.16 emu/g, allowing easy magnetic recovery from water. In the presence of up to 50-fold molar excesses of chloride and nitrate anions, little effect on Cr(VI) removal was seen, but moderate and large impacts were observed with sulphate and hydroxyl anions, respectively. Desorption of adsorbed Cr(VI) and regeneration of the MSM were successfully achieved by NaOH and HCl treatments to deprotonate and protonate the amine groups, respectively. By selecting a silane with suitable functional groups, the surface properties may be tailored for a particular pollutant.
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Affiliation(s)
- Mingchao Xing
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Qiang Xie
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Xiaodi Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Tong Guan
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Deyi Wu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
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26
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Kim D, Ko TY, Kim H, Lee GH, Cho S, Koo CM. Nonpolar Organic Dispersion of 2D Ti 3C 2T x MXene Flakes via Simultaneous Interfacial Chemical Grafting and Phase Transfer Method. ACS NANO 2019; 13:13818-13828. [PMID: 31738507 DOI: 10.1021/acsnano.9b04088] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Herein, we demonstrate a simple and versatile way for preparing stable Ti3C2Tx MXene dispersions in nonpolar organic solvents through a simultaneous interfacial chemical grafting reaction and phase transfer method. Alkylphosphonic acid ligands were chemically grafted on the hydroxyl terminal groups of Ti3C2Tx flakes at the liquid-liquid interface between water and water-immiscible organic medium to form a covalent Ti-O-P bond via interfacial nucleophilic addition and sequential condensation reaction at room temperature; the surface-functionalized Ti3C2Tx flakes concurrently migrated from the aqueous phase to the organic phase. Unlike conventional surface chemical modification methods that require many complex and tedious steps, this is a simple and easy process for fabricating a Ti3C2Tx organic dispersion in various organic solvents, from highly polar to nonpolar. The nonpolar Ti3C2Tx dispersion in chloroform also exhibits strong oxidation resistance and stable long-term storage. This approach provides an opportunity for preparing MXene nanocomposites with nonpolar polymeric matrices that are soluble in organic media for future applications such as stretchable electrode.
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Affiliation(s)
- Daesin Kim
- KU-KIST Graduate School of Converging Science and Technology , Korea University , Seoul 02841 , Republic of Korea
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
| | - Tae Yun Ko
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
| | - Hyerim Kim
- KU-KIST Graduate School of Converging Science and Technology , Korea University , Seoul 02841 , Republic of Korea
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
| | - Gun Hee Lee
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
| | - Sangho Cho
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
- Division of Nano & Information Technology, KIST School , Korea University of Science and Technology , Seoul 02792 , Republic of Korea
| | - Chong Min Koo
- KU-KIST Graduate School of Converging Science and Technology , Korea University , Seoul 02841 , Republic of Korea
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
- Division of Nano & Information Technology, KIST School , Korea University of Science and Technology , Seoul 02792 , Republic of Korea
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27
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Ferreira FJ, Silva LS, da Silva MS, Osajima JA, Meneguin AB, Santagneli SH, Barud HS, Bezerra RD, Silva-Filho EC. Understanding kinetics and thermodynamics of the interactions between amitriptyline or eosin yellow and aminosilane-modified cellulose. Carbohydr Polym 2019; 225:115246. [DOI: 10.1016/j.carbpol.2019.115246] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 08/21/2019] [Accepted: 08/23/2019] [Indexed: 01/07/2023]
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28
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Siuda J, Perdoch W, Mazela B, Zborowska M. Catalyzed Reaction of Cellulose and Lignin with Methyltrimethoxysilane-FT-IR, 13C NMR and 29Si NMR Studies. MATERIALS 2019; 12:ma12122006. [PMID: 31234564 PMCID: PMC6631634 DOI: 10.3390/ma12122006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/19/2019] [Accepted: 06/21/2019] [Indexed: 11/23/2022]
Abstract
It can be found that reaction mechanisms and interactions between wood and organosilicone compounds have not been sufficiently explored. The aim of the study was to determine bonds formed between either cellulose or lignin and methyltrimethoxysilane (MTMOS) during a catalytic silanization reaction. Silanization was performed in the presence of two catalysts of a diverse mechanism of functionalization: aluminum acetylacetonate (Al(acac)3) and acetic acid (AcOH). For this purpose, FT-IR, 13C and 29Si NMR techniques were used. Cellulose silanization efficiency without a catalyst was unlikely. Lignin undergoes a silanization reaction with alkoxysilanes much easier than cellulose. The results showed new bonds between biopolymers and the silanising agent. The new bonds were confirmed by signals at the FT-IR spectra, e.g., 770 cm−1 and 1270 cm−1 (Si–CH3), and at the NMR signal coming from the T1, T2 and T3 structures. Efficiency of reaction was confirmed by atomic absorption spectroscopy (AAS) analysis.
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Affiliation(s)
- Joanna Siuda
- Institute of Wood Chemical Technology, Faculty of Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland.
| | - Waldemar Perdoch
- Institute of Wood Chemical Technology, Faculty of Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland.
| | - Bartłomiej Mazela
- Institute of Wood Chemical Technology, Faculty of Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland.
| | - Magdalena Zborowska
- Institute of Wood Chemical Technology, Faculty of Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland.
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29
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Chen B, Lu Z, Meng H, Chen Y, Yang L, Zhang H, Xie H, Chen C. Effectiveness of pre-silanization in improving bond performance of universal adhesives or self-adhesive resin cements to silica-based ceramics: Chemical and in vitro evidences. Dent Mater 2019; 35:543-553. [DOI: 10.1016/j.dental.2019.01.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 11/14/2018] [Accepted: 01/11/2019] [Indexed: 10/27/2022]
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30
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Sharma A, Thakur M, Bhattacharya M, Mandal T, Goswami S. Commercial application of cellulose nano-composites - A review. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2019; 21:e00316. [PMID: 30847286 PMCID: PMC6389799 DOI: 10.1016/j.btre.2019.e00316] [Citation(s) in RCA: 175] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/12/2019] [Accepted: 02/13/2019] [Indexed: 11/19/2022]
Abstract
Cellulose is the biosynthetic product from plants, animals and bacteria. Cellulose is the most abundant polymer having long linear chain like structure composed of (1,4) linked β-D glucopyranosyl units assembled into hierarchical structures of microfibrils with excellent strength and stiffness. And 'nanocellulose' refers to the cellulosic materials with defined nano-scale structural dimensions. They may be cellulose nanocrystal (CNC or NCC), cellulose nanofibers (CNF) or bacterial nanocellulose. Nanocellulose is non-toxic, biodegradable and biocompatible with no adverse effects on health and environment. Due to its low thermal expansion coefficient, high aspect ratio, better tensile strength, good mechanical and optical properties, they find many applications in thermo-reversible and tenable hydrogels, paper making, coating additives, food packaging, flexible screens, optically transparent films and light weight materials for ballistic protection, automobile windows. It also find potential in biopharmaceutical applications such as in drug delivery and for fabricating temporary implants with PHB like sutures, stents etc.
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Affiliation(s)
- Amita Sharma
- Center of Innovative and Applied Bioprocessing, Knowledge City, Sector-81 Mohali, Punjab 140306 India
- Department of Chemical Engineering, National Institute of Technology, Durgapur, West Bengal 713209 India
| | - Manisha Thakur
- Center of Innovative and Applied Bioprocessing, Knowledge City, Sector-81 Mohali, Punjab 140306 India
| | - Munna Bhattacharya
- Center of Innovative and Applied Bioprocessing, Knowledge City, Sector-81 Mohali, Punjab 140306 India
| | - Tamal Mandal
- Department of Chemical Engineering, National Institute of Technology, Durgapur, West Bengal 713209 India
| | - Saswata Goswami
- Center of Innovative and Applied Bioprocessing, Knowledge City, Sector-81 Mohali, Punjab 140306 India
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31
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Tangsongcharoen W, Punyamoonwongsa P, Chaiyasat P. High performance biocompatible cellulose‐based microcapsules encapsulating gallic acid prepared by inverse microsuspension polymerization. POLYM INT 2019. [DOI: 10.1002/pi.5757] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Wichsuda Tangsongcharoen
- Department of Chemistry, Faculty of Science and TechnologyRajamangala University of Technology Thanyaburi Pathum Thani Thailand
| | | | - Preeyaporn Chaiyasat
- Department of Chemistry, Faculty of Science and TechnologyRajamangala University of Technology Thanyaburi Pathum Thani Thailand
- Advanced Materials Design and Development (AMDD) Research Unit, Faculty of Science and TechnologyRajamangala University of Technology Thanyaburi Pathum Thani Thailand
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Tourné-Péteilh C, Robin B, Lions M, Martinez J, Mehdi A, Subra G, Devoisselle JM. Combining sol–gel and microfluidics processes for the synthesis of protein-containing hybrid microgels. Chem Commun (Camb) 2019; 55:13112-13115. [DOI: 10.1039/c9cc04963k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Biocompatible encapsulation of proteins in hybrid microgels of a silylated hydrogel, focused on soft procedures and cross-linking conditions.
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Affiliation(s)
| | | | | | | | - Ahmad Mehdi
- ICGM
- University of Montpellier
- CNRS
- ENSCM
- Montpellier
| | - Gilles Subra
- IBMM
- University of Montpellier
- CNRS
- ENSCM
- Montpellier
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Oushabi A, Oudrhiri Hassani F, Abboud Y, Sair S, Tanane O, El Bouari A. Improvement of the interface bonding between date palm fibers and polymeric matrices using alkali-silane treatments. INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY 2018. [DOI: 10.1007/s40090-018-0162-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Somasundaram S. Silane coatings of metallic biomaterials for biomedical implants: A preliminary review. J Biomed Mater Res B Appl Biomater 2018; 106:2901-2918. [PMID: 30091505 DOI: 10.1002/jbm.b.34151] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 02/24/2018] [Accepted: 04/17/2018] [Indexed: 12/16/2022]
Abstract
In response to increased attention in literature, this work provides a qualitative review surrounding the application of silane-based coatings of metallic biomaterials for biomedical implants. Included herein is both a brief summary of existing knowledge and concepts regarding silane-based thin films, along with an analysis of recent peer-reviewed publications and advances towards their practical application for biomedical coatings. Specifically, the review identifies innovative silane-based coatings according to their molecular identity and film structure and analyses their impact on the biocorrosion resistance, protein adsorption, cell viability, and antimicrobial properties of the overall coated implant. It is shown that a range of common silanes clearly exhibit promising properties for biomedical implant coatings, but further work is needed, particularly on mechanisms of physiological interaction and characteristic effects of silane functional groups, before seeing clinical use. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 2901-2918, 2018.
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Affiliation(s)
- Sahadev Somasundaram
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, Queensland, Australia
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New approach for immobilization of 3-aminopropyltrimethoxysilane and TiO 2 nanoparticles into cellulose for BJ1 skin cells proliferation. Carbohydr Polym 2018; 199:193-204. [PMID: 30143120 DOI: 10.1016/j.carbpol.2018.07.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 06/12/2018] [Accepted: 07/03/2018] [Indexed: 12/23/2022]
Abstract
In the present study, tosylcellulose (TC) was used as a key intermediate for the selective coupling with 3-aminopropyltrimethoxysilane (APTMS) affording amino-propylsilane-grafted tosylcellulose (TC-Si). Solid state 13C NMR and FT-IR analyses confirmed the coupling and self-condensation of APTMS along TC. The changes in the surface morphology of the functionalized cellulose were identified by SEM imaging. The thermal stability of TC-Si was significantly improved as compared to MCC and TC. A new organic/inorganic hybrid cellulosic material was fabricated by embedding TiO2 nanoparticles into TC-Si network. The new cellulose polymers were investigated for their ability to promote the proliferation of human skin fibroblast (BJ1). The cell cytotoxicity assay showed that both TC and TC-Si possessed moderate toxicity to BJ1 cells by 17% and 23.8%, respectively at 20 μM. Meanwhile, TC-Si/TiO2 hybrid enhanced the proliferation of BJ1 by 42%. Additionally TC-Si/TiO2 hybrid demonstrated promising antimicrobial activity against Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans.
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Ghaffar SH, Madyan OA, Fan M, Corker J. The Influence of Additives on the Interfacial Bonding Mechanisms Between Natural Fibre and Biopolymer Composites. Macromol Res 2018. [DOI: 10.1007/s13233-018-6119-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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38
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Rao J, Zhou Y, Fan M. Revealing the Interface Structure and Bonding Mechanism of Coupling Agent Treated WPC. Polymers (Basel) 2018; 10:polym10030266. [PMID: 30966301 PMCID: PMC6414935 DOI: 10.3390/polym10030266] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 02/23/2018] [Accepted: 02/27/2018] [Indexed: 11/16/2022] Open
Abstract
This paper presents the interfacial optimisation of wood plastic composites (WPC) based on recycled wood flour and polyethylene by employing maleated and silane coupling agents. The effect of the incorporation of the coupling agents on the variation of chemical structure of the composites were investigated by Attenuated total reflectance-Fourier Transform Infrared spectroscopy (ATR-FTIR) and Solid state 13C Nuclear Magnetic Resonance spectroscopy (NMR) analyses. The results revealed the chemical reactions that occurred between the coupling agents and raw materials, which thus contributed to the enhancement of compatibility and interfacial adhesion between the constituents of WPC. NMR results also indicated that there existed the transformation of crystalline cellulose to an amorphous state during the coupling agent treatments, reflecting the inferior resonance of crystalline carbohydrates. Fluorescence Microscope (FM) and Scanning Electron Microscope (SEM) analyses showed the improvements of wood particle dispersion and wettability, compatibility of the constituents, and resin penetration, and impregnation of the composites after the coupling agent treatments. The optimised interface of the composites was attributed to interdiffusion, electrostatic adhesion, chemical reactions, and mechanical interlocking bonding mechanisms.
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Affiliation(s)
- Jiuping Rao
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Yonghui Zhou
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
- Department of Civil and Environmental Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, Uxbridge UB8 3PH, UK.
| | - Mizi Fan
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
- Department of Civil and Environmental Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, Uxbridge UB8 3PH, UK.
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Saman N, Rashid MU, Lye JWP, Mat H. Recovery of Au(III) from an aqueous solution by aminopropyltriethoxysilane-functionalized lignocellulosic based adsorbents. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2017.12.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Peresin MS, Kammiovirta K, Heikkinen H, Johansson LS, Vartiainen J, Setälä H, Österberg M, Tammelin T. Understanding the mechanisms of oxygen diffusion through surface functionalized nanocellulose films. Carbohydr Polym 2017; 174:309-317. [PMID: 28821072 DOI: 10.1016/j.carbpol.2017.06.066] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Revised: 06/05/2017] [Accepted: 06/17/2017] [Indexed: 11/15/2022]
Abstract
A concept for direct surface modification on self-standing films of cellulose nanofibrils (CNF) is demonstrated using an aminosilane group in cellulose compatible solvent (dimethyl acetamide, DMA). The chemically modified structure efficiently prevents the oxygen molecules from interacting with the nanocellulose film in the presence of water molecules. Oxygen permeability values lower than 1mLmmm-2day-1atm-1 were achieved at extremely high levels of relative humidity (RH95%). The aminosilane reaction is compared to conventional hydrophobization reaction using hexamethyldisilazane. The differences with respect to interactions between cellulosic nanofibrils, water and oxygen molecules taking place with aminated and silylated CNF films correlated with the degree of surface substitution, surface hydrophilicity and permeability of the formed layer. The self-condensation reactions taking place on the film surface during aminosilane-mediated bonding were decisive for low oxygen permeability. Experimental evidence on the importance of interfacial processes that hinder the water-cellulose interactions while keeping film's low affinity towards oxygen is demonstrated.
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Affiliation(s)
- Maria Soledad Peresin
- VTT Technical Research Centre of Finland Ltd., P.O. Box, FI-02044 VTT, Espoo, Finland.
| | - Kari Kammiovirta
- VTT Technical Research Centre of Finland Ltd., P.O. Box, FI-02044 VTT, Espoo, Finland
| | - Harri Heikkinen
- VTT Technical Research Centre of Finland Ltd., P.O. Box, FI-02044 VTT, Espoo, Finland
| | - Leena-Sisko Johansson
- Aalto University, School of Chemical Engineering, Department of Bioproducts and Biosystems, P. O. Box 16300, FI- 00076 Aalto, Espoo, Finland
| | - Jari Vartiainen
- VTT Technical Research Centre of Finland Ltd., P.O. Box, FI-02044 VTT, Espoo, Finland
| | - Harri Setälä
- VTT Technical Research Centre of Finland Ltd., P.O. Box, FI-02044 VTT, Espoo, Finland
| | - Monika Österberg
- Aalto University, School of Chemical Engineering, Department of Bioproducts and Biosystems, P. O. Box 16300, FI- 00076 Aalto, Espoo, Finland
| | - Tekla Tammelin
- VTT Technical Research Centre of Finland Ltd., P.O. Box, FI-02044 VTT, Espoo, Finland.
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Saini S, Belgacem MN, Bras J. Effect of variable aminoalkyl chains on chemical grafting of cellulose nanofiber and their antimicrobial activity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:760-768. [DOI: 10.1016/j.msec.2017.02.062] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 11/08/2016] [Accepted: 02/14/2017] [Indexed: 01/10/2023]
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Zhang Z, Zhang Y, Lin Z, Mulyadi A, Mu W, Deng Y. Butyric anhydride modified lignin and its oil-water interfacial properties. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.02.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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43
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Zhou Y, Fan M. Recycled tyre rubber-thermoplastic composites through interface optimisation. RSC Adv 2017. [DOI: 10.1039/c7ra04925k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Chemical interactions between a coupling agent and raw materials benefited the improvement of compatibility, homogeneity and interfacial adhesion of a rubber–PE composite.
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Affiliation(s)
- Yonghui Zhou
- College of Material Engineering
- Fujian Agricultural and Forestry University
- P. R. China
- Department of Civil Engineering
- College of Engineering, Design and Physical Sciences
| | - Mizi Fan
- College of Material Engineering
- Fujian Agricultural and Forestry University
- P. R. China
- Department of Civil Engineering
- College of Engineering, Design and Physical Sciences
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Giannici F, Mossuto Marculescu A, Cattaneo AS, Tealdi C, Mustarelli P, Longo A, Martorana A. Covalent and Ionic Functionalization of HLN Layered Perovskite by Sonochemical Methods. Inorg Chem 2016; 56:645-653. [DOI: 10.1021/acs.inorgchem.6b02581] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Francesco Giannici
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze ed. 17, I-90128 Palermo, Italy
| | - Adriana Mossuto Marculescu
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze ed. 17, I-90128 Palermo, Italy
| | - Alice Silvia Cattaneo
- Dipartimento di Chimica Sezione di Chimica-Fisica, Università degli Studi di Pavia, Via Taramelli 16, I-2700 Pavia, Italy
| | - Cristina Tealdi
- Dipartimento di Chimica Sezione di Chimica-Fisica, Università degli Studi di Pavia, Via Taramelli 16, I-2700 Pavia, Italy
| | - Piercarlo Mustarelli
- Dipartimento di Chimica Sezione di Chimica-Fisica, Università degli Studi di Pavia, Via Taramelli 16, I-2700 Pavia, Italy
| | - Alessandro Longo
- CNR−Istituto per lo Studio dei Materiali Nanostrutturati, Via U. La Malfa, I-90146 Palermo, Italy
- Netherlands Organization for Scientific Research at ESRF, F-38043 Grenoble, France
| | - Antonino Martorana
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze ed. 17, I-90128 Palermo, Italy
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Spectroscopic analysis of methacrylate groups introduced on silica particle surfaces by the aza-Michael addition reaction. KOREAN J CHEM ENG 2016. [DOI: 10.1007/s11814-016-0150-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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46
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Loof D, Hiller M, Oschkinat H, Koschek K. Quantitative and Qualitative Analysis of Surface Modified Cellulose Utilizing TGA-MS. MATERIALS 2016; 9:ma9060415. [PMID: 28773537 PMCID: PMC5456835 DOI: 10.3390/ma9060415] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 05/13/2016] [Accepted: 05/20/2016] [Indexed: 11/16/2022]
Abstract
With the aim to enhance interfacial adhesion of a hydrophobic polymer matrix and cellulosic fibers and fillers, chemical surface modifications with silane coupling agents are performed. Thermogravimetric analysis (TGA) could be used to determine the degree of surface functionalization. However, similar thermal properties of treated and untreated cellulose hamper a precise determination of silane loading. This contribution deals with quantitative determination of silane loading combining both TGA and elemental analysis. Firstly, silane modified celluloses were studied by FT-IR, Raman, solid state NMR spectroscopy, and polarized light microscopy in order to determine functional groups and to study the impact of chemical treatment on cellulose morphology. Secondly, thermal stability and pyrolysis processes were studied by TG-MS analysis. In order to determine the exact silane loading, the mass percentages of the appropriate elements were quantified by elemental analysis and correlated with the charred residues determined by TGA yielding a linear dependency. With that correlation, it was possible to determine silane loadings for additional samples utilizing simple TGA measurements. The main advantage of that approach is that only one calibration is necessary for routine analyses of further samples and TGA-MS coupling gives additional information on thermal stability and pyrolysis routes, simultaneously.
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Affiliation(s)
- Daniel Loof
- Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Strasse 12, Bremen 28359, Germany.
- Department of Biology/Chemistry (FB2), University of Bremen, Leobener Strasse NW2C, Bremen 28359, Germany.
| | - Matthias Hiller
- Department NMR-supported Structural Biology, Leibniz-Institut für Molekulare Pharmakologie, Robert-Rössle-Strasse 10, Berlin 13125, Germany.
| | - Hartmut Oschkinat
- Department NMR-supported Structural Biology, Leibniz-Institut für Molekulare Pharmakologie, Robert-Rössle-Strasse 10, Berlin 13125, Germany.
| | - Katharina Koschek
- Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Strasse 12, Bremen 28359, Germany.
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47
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Moazzam P, Razmjou A, Golabi M, Shokri D, Landarani-Isfahani A. Investigating the BSA protein adsorption and bacterial adhesion of Al-alloy surfaces after creating a hierarchical (micro/nano) superhydrophobic structure. J Biomed Mater Res A 2016; 104:2220-33. [PMID: 27104583 DOI: 10.1002/jbm.a.35751] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 04/05/2016] [Accepted: 04/15/2016] [Indexed: 12/12/2022]
Abstract
Bacterial adhesion and subsequent biofilm formation on metals such as aluminum (Al) alloys lead to serious issues in biomedical and industrial fields from both an economical and health perspective. Here, we showed that a careful manipulation of Al surface characteristics via a facile two-steps superhydrophobic modification can provide not only biocompatibility and an ability to control protein adsorption and bacterial adhesion, but also address the issue of apparent long-term toxicity of Al-alloys. To find out the roles of surface characteristics, surface modification and protein adsorption on microbial adhesion and biofilm formation, the surfaces were systematically characterized by SEM, EDX, XPS, AFM, FTIR, water contact angle (WCA) goniometry, surface free energy (SFE) measurement, MTT, Bradford, Lowry and microtiter plate assays and also flow-cytometry and potentiostat analyses. Results showed that WCA and SFE changed from 70° to 163° and 36.3 to 0.13 mN m(-1) , respectively. The stable and durable modification led to a substantial reduction in static/dynamic BSA adsorption. The effect of such a treatment on the biofilm formation was analyzed by using three different bacteria of Pseudomonas aeruginosa, Staphylococcus epidermidis, and Staphylococcus aureus. The microtiter plate assay and flow cytometry analysis showed that the modification not only could substantially reduce the bacterial adhesion but this biofouling resistance is independent of bacterium type. An excellent cell viability after exposure of HeLa cells to waters incubated with the modified samples was observed. Finally, the corrosion rate reduced sharply from 856.6 to 0.119 MPY after superhydrophobic modifications, which is an excellent stable corrosion inhibition property. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 2220-2233, 2016.
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Affiliation(s)
- Parisa Moazzam
- Department of Nanotechnology, Faculty of Advanced Science and Technologies, University of Isfahan, Isfahan, 81746-73441, Iran
| | - Amir Razmjou
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, 81746-73441, Iran
| | - Mohsen Golabi
- Division of Biosensors and Bioelectronics, Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, SE-581 83, Sweden
| | - Dariush Shokri
- Nosocomial Infection Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Amir Landarani-Isfahani
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan, 81746-73441, Iran
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Abstract
Portable, nanoparticle (NP)-enhanced enzyme sensors have emerged as powerful devices for qualitative and quantitative analysis of a variety of analytes for biomedicine, environmental applications, and pharmaceutical fields. This chapter describes a method for the fabrication of a portable, paper-based, inexpensive, robust enzyme biosensor for the detection of substrates of oxidase enzymes. The method utilizes redox-active NPs of cerium oxide (CeO2) as a sensing platform which produces color in response to H2O2 generated by the action of oxidase enzymes on their corresponding substrates. This avoids the use of peroxidases which are routinely used in conjunction with glucose oxidase. The CeO2 particles serve dual roles, as high surface area supports to anchor high loadings of the enzyme as well as a color generation reagent, and the particles are recycled multiple times for the reuse of the biosensor. These sensors are small, light, disposable, inexpensive, and they can be mass produced by standard, low-cost printing methods. All reagents needed for the analysis are embedded within the paper matrix, and sensors stored over extended periods of time without performance loss. This novel sensor is a general platform for the in-field detection of analytes that are substrates for oxidase enzymes in clinical, food, and environmental samples.
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Borovin E, Callone E, Ribot F, Diré S. Mechanism and Kinetics of Oligosilsesquioxane Growth in the In Situ Water Production Sol–Gel Route: Dependence on Water Availability. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501220] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Evgeny Borovin
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy, http://web.unitn.it/en/dii
| | - Emanuela Callone
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy, http://web.unitn.it/en/dii
| | - Francois Ribot
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France 11 place Marcelin Berthelot, 75005 Paris, France
| | - Sandra Diré
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy, http://web.unitn.it/en/dii
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Zhang H, Zhang J, Yun R, Jiang Z, Liu H, Yan D. Nanohybrids of organo-modified layered double hydroxides and polyurethanes with enhanced mechanical, damping and UV absorption properties. RSC Adv 2016. [DOI: 10.1039/c6ra04398d] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The construction of high-performance polymer–clay nanocomposites plays an important role in developing new types of organic–inorganic hybrids.
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Affiliation(s)
- Hao Zhang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Jun Zhang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Rongping Yun
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Zhiguo Jiang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Haimei Liu
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
- College of Environmental and Chemical Engineering
| | - Dongpeng Yan
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
- Key Laboratory of Theoretical and Computational Photochemistry
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