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Zhang H, Zhou M, Jin H, Jia W, Li C, Pan F, Shi H. Enzyme activity test paper with high wet strength and anion adsorption properties fabricated from whole cationized softwood chemical fiber. Int J Biol Macromol 2024; 273:132769. [PMID: 38823745 DOI: 10.1016/j.ijbiomac.2024.132769] [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: 01/19/2024] [Revised: 05/27/2024] [Accepted: 05/28/2024] [Indexed: 06/03/2024]
Abstract
Paper-based test film material is widely used in a variety of test instruments for different applications. The enzyme activity test paper sheet is one of the most popularly used test papers. Here we present a novel fabrication of paper-based enzyme activity test paper without cationic resin added in. The chemical pulping fibers were first beaten to different degrees (from 14.6 to 41.5°SR) with a PFI beater. After that, the fibers were modified with a cationic agent (3-chloro-2-hydroxypropyl trimethyl ammonium chloride) under the system of alkali and water solution. Finally, the test papers were made with the modified fiber by a regular paper former in lab. The results showed that beating is beneficial for the improvement of the cationization reaction which is indicated by the Zeta potential, FTIR and EDS. The main mechanisms involved are the destruction of crystalline zone, increase of free hydroxyl group and defibrillation. This hypothesis was supported by the SEM, XRD and fiber analyzer. Beating under the optimized condition, the wet strength and liquid absorbability of test paper can meet the application requirement, and the test results of enzyme activity are quite close to those of commercial test papers.
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Affiliation(s)
- He Zhang
- Liaoning Key Lab of Lignocellulose chemistry and Biomaterials, The Liaoning Province Key Laboratory of Paper and Pulp Engineering, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, PR China
| | - Miaofang Zhou
- Zhejiang Hanghua New Materials Sci.&Tech. Co., Ltd., Hangzhou, Zhejiang 310000, PR China
| | - Huiqi Jin
- Liaoning Key Lab of Lignocellulose chemistry and Biomaterials, The Liaoning Province Key Laboratory of Paper and Pulp Engineering, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, PR China
| | - Wenchao Jia
- Liaoning Key Lab of Lignocellulose chemistry and Biomaterials, The Liaoning Province Key Laboratory of Paper and Pulp Engineering, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, PR China
| | - Changgeng Li
- Liaoning Key Lab of Lignocellulose chemistry and Biomaterials, The Liaoning Province Key Laboratory of Paper and Pulp Engineering, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, PR China
| | - Feng Pan
- Takara Biotechnology(Dalian) Co., Ltd., Dalian, Liaoning 116000, PR China
| | - Haiqiang Shi
- Liaoning Key Lab of Lignocellulose chemistry and Biomaterials, The Liaoning Province Key Laboratory of Paper and Pulp Engineering, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, PR China.
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Wang W, Liu J, Khan MJ, Wang R, Francesco S, Sun J, Mao X, Huang WC. Magnetic macroporous chitin microsphere as a support for covalent enzyme immobilization. Int J Biol Macromol 2024; 256:128214. [PMID: 37992928 DOI: 10.1016/j.ijbiomac.2023.128214] [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: 09/25/2023] [Revised: 11/06/2023] [Accepted: 11/15/2023] [Indexed: 11/24/2023]
Abstract
In this study, a novel magnetic macroporous chitin microsphere (MMCM) was developed for enzyme immobilization. Chitin nanofibers were prepared and subsequently subjected to self-assembly with magnetic nanoparticles and PMMA (polymethyl methacrylate). Following this, microspheres were formed through spray drying, achieving a porous structure through etching. The MMCM serves as an effective support for immobilizing enzymes, allowing for their covalent immobilization both on the microsphere's surface and within its pores. The substantial surface area resulting from the porous structure leads to a 2.1-fold increase in enzyme loading capacity compared to non-porous microspheres. The MMCM enhances stability of the immobilized enzymes under various pH and temperature conditions. Furthermore, after 20 days of storage at 4 °C, the residual activity of the immobilized enzyme was 2.93 times that of the free enzyme. Even after being recycled 10 times, the immobilized enzyme retained 56.7 % of its initial activity. It's noteworthy that the active sites of the enzymes remained unchanged after immobilization using the MMCM, and kinetic analysis revealed that the affinity of the immobilized enzymes rivals that of the free enzymes.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China
| | - Jiayuan Liu
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
| | - Muhammad Junaid Khan
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China
| | - Rong Wang
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
| | - Secundo Francesco
- Istituto di Scienze e Tecnologie Chimiche "Giulio Natta", Consiglio Nazionale delle Ricerche via Mario Bianco 9, 20131 Milan, Italy
| | - Jianan Sun
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China
| | - Xiangzhao Mao
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China; Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China
| | - Wen-Can Huang
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China.
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Cross-Linking of Oxidized Hydroxypropyl Cellulose in Paper: Influence of Molecular Weight and Polymer Distribution on Paper Wet Strength Development. Gels 2023; 9:gels9030206. [PMID: 36975655 PMCID: PMC10048462 DOI: 10.3390/gels9030206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/01/2023] [Accepted: 03/06/2023] [Indexed: 03/12/2023] Open
Abstract
With the overarching aim for the development of sustainable, nontoxic wet strength agents for paper, a novel polymer gel system based on oxidized hydroxypropyl cellulose (keto-HPC) cross-linked with polyamines was investigated in detail to gain a deeper insight into the wet strength mechanism. When applied to paper, this wet strength system significantly increases the relative wet strength by using only low amounts of polymer, and it is therefore comparable with established wet strength agents based on fossil resources, such as polyamidoamine epichlorohydrin resins. With the help of ultrasonic treatment, keto-HPC was degraded with respect to its molecular weight and further cross-linked in paper using polymeric amine-reactive counterparts. The resulting polymer-cross-linked paper mechanical properties were analyzed with respect to the dry and wet tensile strength, respectively. In addition, we analyzed the polymer distribution using fluorescence confocal laser scanning microscopy (CLSM). If high-molecular-weight samples are being used for cross-linking, we do find accumulation of the polymer mainly on the surface of the fibers and at fiber crossing points, accompanied with enhancing strong effects on paper’s wet tensile strength. In contrast, if low-molecular-weight (i.e., degraded) keto-HPC is being applied, the macromolecules are capable of entering the inner porous structure of the paper fibers, and almost no accumulation at the fiber crossing points is observed, which also results in a lowered wet paper tensile strength, respectively. This insight into wet strength mechanisms of the keto-HPC/polyamine system can thus lead to new opportunities for the development of alternative biobased wet strength agents where molecular weight dependence of the wet tensile properties allows for a fine tuning of mechanical properties in the wet state.
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Nicolas M, Serghei A, Lucas C, Beyou E, Fumagalli M. Grafting of polyamines onto periodate oxidized nanocellulose, and its application to the fabrication of ionic nanopapers. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Soni R, Hsu Y, Asoh T, Uyama H. Cellulose nanofiber reinforced starch film with rapid disintegration in marine environments. J Appl Polym Sci 2022. [DOI: 10.1002/app.52776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Raghav Soni
- Department of Applied Chemistry, Graduate School of Engineering Osaka University Osaka Japan
| | - Yu‐I Hsu
- Department of Applied Chemistry, Graduate School of Engineering Osaka University Osaka Japan
| | - Taka‐Aki Asoh
- Department of Applied Chemistry, Graduate School of Engineering Osaka University Osaka Japan
| | - Hiroshi Uyama
- Department of Applied Chemistry, Graduate School of Engineering Osaka University Osaka Japan
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Analysis of the In Vitro Toxicity of Nanocelluloses in Human Lung Cells as Compared to Multi-Walled Carbon Nanotubes. NANOMATERIALS 2022; 12:nano12091432. [PMID: 35564141 PMCID: PMC9104944 DOI: 10.3390/nano12091432] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/18/2022] [Accepted: 04/20/2022] [Indexed: 11/16/2022]
Abstract
Cellulose micro/nanomaterials (CMNM), comprising cellulose microfibrils (CMF), nanofibrils (CNF), and nanocrystals (CNC), are being recognized as promising bio-nanomaterials due to their natural and renewable source, attractive properties, and potential for applications with industrial and economical value. Thus, it is crucial to investigate their potential toxicity before starting their production at a larger scale. The present study aimed at evaluating the cell internalization and in vitro cytotoxicity and genotoxicity of CMNM as compared to two multi-walled carbon nanotubes (MWCNT), NM-401 and NM-402, in A549 cells. The exposure to all studied NM, with the exception of CNC, resulted in evident cellular uptake, as analyzed by transmission electron microscopy. However, none of the CMNM induced cytotoxic effects, in contrast to the cytotoxicity observed for the MWCNT. Furthermore, no genotoxicity was observed for CNF, CNC, and NM-402 (cytokinesis-block micronucleus assay), while CMF and NM-401 were able to significantly raise micronucleus frequency. Only NM-402 was able to induce ROS formation, although it did not induce micronuclei. Thus, it is unlikely that the observed CMF and NM-401 genotoxicity is mediated by oxidative DNA damage. More studies targeting other genotoxicity endpoints and cellular and molecular events are underway to allow for a more comprehensive safety assessment of these nanocelluloses.
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Ventura C, Marques C, Cadete J, Vilar M, Pedrosa JFS, Pinto F, Fernandes SN, da Rosa RR, Godinho MH, Ferreira PJT, Louro H, Silva MJ. Genotoxicity of Three Micro/Nanocelluloses with Different Physicochemical Characteristics in MG-63 and V79 Cells. J Xenobiot 2022; 12:91-108. [PMID: 35645290 PMCID: PMC9149940 DOI: 10.3390/jox12020009] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/14/2022] [Accepted: 04/18/2022] [Indexed: 12/10/2022] Open
Abstract
(1) Background: Nanocellulose is an innovative engineered nanomaterial with an enormous potential for use in a wide array of industrial and biomedical applications and with fast growing economic value. The expanding production of nanocellulose is leading to an increased human exposure, raising concerns about their potential health effects. This study was aimed at assessing the potential toxic and genotoxic effects of different nanocelluloses in two mammalian cell lines; (2) Methods: Two micro/nanocelluloses, produced with a TEMPO oxidation pre-treatment (CNFs) and an enzymatic pre-treatment (CMFs), and cellulose nanocrystals (CNCs) were tested in osteoblastic-like human cells (MG-63) and Chinese hamster lung fibroblasts (V79) using the MTT and clonogenic assays to analyse cytotoxicity, and the micronucleus assay to test genotoxicity; (3) Results: cytotoxicity was observed by the clonogenic assay in V79 cells, particularly for CNCs, but not by the MTT assay; CNF induced micronuclei in both cell lines and nucleoplasmic bridges in MG-63 cells; CMF and CNC induced micronuclei and nucleoplasmic bridges in MG-63 cells, but not in V79 cells; (4) Conclusions: All nanocelluloses revealed cytotoxicity and genotoxicity, although at different concentrations, that may be related to their physicochemical differences and availability for cell uptake, and to differences in the DNA damage response of the cell model.
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Affiliation(s)
- Célia Ventura
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
- Center for Toxicogenomics and Human Health (ToxOmics), NOVA Medical School-FCM, UNL, Rua Câmara Pestana, 6 Ed. CEDOC II, 1150-082 Lisbon, Portugal
- Correspondence:
| | - Catarina Marques
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
| | - João Cadete
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
| | - Madalena Vilar
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
| | - Jorge F. S. Pedrosa
- CIEPQPF, Department of Chemical Engineering, University of Coimbra, Pólo II, Rua Silvo Lima, 3030-790 Coimbra, Portugal; (J.F.S.P.); (P.J.T.F.)
| | - Fátima Pinto
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
- Center for Toxicogenomics and Human Health (ToxOmics), NOVA Medical School-FCM, UNL, Rua Câmara Pestana, 6 Ed. CEDOC II, 1150-082 Lisbon, Portugal
| | - Susete Nogueira Fernandes
- CENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology (FCT NOVA), NOVA University Lisbon, Campus da Caparica, 2829-516 Caparica, Portugal; (S.N.F.); (R.R.d.R.); (M.H.G.)
| | - Rafaela Raupp da Rosa
- CENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology (FCT NOVA), NOVA University Lisbon, Campus da Caparica, 2829-516 Caparica, Portugal; (S.N.F.); (R.R.d.R.); (M.H.G.)
| | - Maria Helena Godinho
- CENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology (FCT NOVA), NOVA University Lisbon, Campus da Caparica, 2829-516 Caparica, Portugal; (S.N.F.); (R.R.d.R.); (M.H.G.)
| | - Paulo J. T. Ferreira
- CIEPQPF, Department of Chemical Engineering, University of Coimbra, Pólo II, Rua Silvo Lima, 3030-790 Coimbra, Portugal; (J.F.S.P.); (P.J.T.F.)
| | - Henriqueta Louro
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
- Center for Toxicogenomics and Human Health (ToxOmics), NOVA Medical School-FCM, UNL, Rua Câmara Pestana, 6 Ed. CEDOC II, 1150-082 Lisbon, Portugal
| | - Maria João Silva
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
- Center for Toxicogenomics and Human Health (ToxOmics), NOVA Medical School-FCM, UNL, Rua Câmara Pestana, 6 Ed. CEDOC II, 1150-082 Lisbon, Portugal
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Ferreira PJT, Lourenço AF. Nanocelluloses: Production, Characterization and Market. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1357:129-151. [DOI: 10.1007/978-3-030-88071-2_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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9
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Pachpinde S, Natarajan U. Conformations, inter-molecular structure and hydrogen bond dynamics of neutral and cationic poly(vinyl amine) in aqueous solution. MOLECULAR SIMULATION 2021. [DOI: 10.1080/08927022.2021.1968389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Sushil Pachpinde
- Macromolecular Modeling and Simulation Lab, Department of Chemical Engineering, Indian Institute of Technology (IIT) Madras, Chennai, India
| | - Upendra Natarajan
- Macromolecular Modeling and Simulation Lab, Department of Chemical Engineering, Indian Institute of Technology (IIT) Madras, Chennai, India
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Seelinger D, Trosien S, Nau M, Biesalski M. Tailored oxidation of hydroxypropyl cellulose under mild conditions for the generation of wet strength agents for paper. Carbohydr Polym 2021; 254:117458. [PMID: 33357917 DOI: 10.1016/j.carbpol.2020.117458] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 11/25/2020] [Accepted: 11/27/2020] [Indexed: 11/30/2022]
Abstract
Secondary hydroxyl groups of hydroxypropyl cellulose (HPC) are transformed into reactive carbonyl groups selectively via TEMPO-mediated oxidation in the presence of sodium hypochlorite. By using this oxidation protocol, we introduced carbonyl functions in HPC under mild conditions, with a controlled degree of oxidation (DOx) up to 2.5 and a low degradation of the polysaccharide. The effect of the concentration of sodium hypochlorite on the resulting oxidized alcohol groups has been investigated in detail. Oxidized HPC crosslinks spontaneous at room temperature and mild pH-values with a variety of amines to form water stable hydrogels. If applied on lab-made paper sheet, thermally cross-linking this polymer with amines significantly increased the wet tensile strength. The utilization of such wet strength agents could lead to new approaches in terms of recyclability and biodegradability of wet strength agents interesting for a large number of different paper grades.
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Affiliation(s)
- David Seelinger
- Ernst-Berl-Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany.
| | - Simon Trosien
- Ernst-Berl-Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany.
| | - Maximilian Nau
- Ernst-Berl-Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany.
| | - Markus Biesalski
- Ernst-Berl-Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany.
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Grishkewich N, Mohammed N, Wei S, Vasudev M, Shi Z, Berry RM, Tam KC. Dye Removal Using Sustainable Membrane Adsorbents Produced from Melamine Formaldehyde−Cellulose Nanocrystals and Hard Wood Pulp. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c04033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Nathan Grishkewich
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Nishil Mohammed
- Energy and Environment Division, Southern Research, 2000 Ninth Avenue South, Birmingham, Alabama 35205, United States
| | - Stephen Wei
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Madhav Vasudev
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Zengqian Shi
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Richard M. Berry
- CelluForce Inc., 625, Président-Kennedy Avenue, Montreal, Quebec H3A 1K2, Canada
| | - Kam Chiu Tam
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
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A review on cationic starch and nanocellulose as paper coating components. Int J Biol Macromol 2020; 162:578-598. [DOI: 10.1016/j.ijbiomac.2020.06.131] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 06/06/2020] [Accepted: 06/14/2020] [Indexed: 01/11/2023]
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Chao FC, Wu MH, Chen LC, Lin HL, Liu DZ, Ho HO, Sheu MT. Preparation and characterization of chemically TEMPO-oxidized and mechanically disintegrated sacchachitin nanofibers (SCNF) for enhanced diabetic wound healing. Carbohydr Polym 2019; 229:115507. [PMID: 31826505 DOI: 10.1016/j.carbpol.2019.115507] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 10/14/2019] [Accepted: 10/18/2019] [Indexed: 11/16/2022]
Abstract
TEMPO-oxidization and mechanical disintegration were utilized to develop sacchachitin nanofibers (SCNF) with a 3D gel structure for being an ideal scaffold. Mechanically disintegrated SCNF (MDSCNF) with NanoLyzer® at 20,000 psi for 5 cycles and TEMPO-oxidized SCNF (TOSCNF) produced with 5.0 and 10.0 mmole NaClO/g SC was designated as SCN5, T050SC, and T100SC, respectively. All 2% MDSCNF suspensions were demonstrated to be in gel form, while all except T100SC of 2% TOSCNF suspensions showed to be wet fiber-like hydrogel. In diabetic wound healing study, both SCN5 and T050SC incorporated in AMPS (2-acrylamide-2-methyl-propane sulfonate)-based wound dressing were showed to accelerate diabetic wound healing forming nearly the same as normal tissues. T050SC/H further provided the healed wound with growth of sweat glands and hair follicles indicating the wound had healed as functional tissue. Conclusively, TEMPO-oxidized SCNF-based hydrogel scaffolds showed greater potentials in tissue regeneration due to its unique physical and chemical properties.
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Affiliation(s)
- Fang-Ching Chao
- School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei, Taiwan, ROC.
| | - Meng-Huang Wu
- Department of Orthopedics, Taipei Medical University Hospital, Taipei, Taiwan, ROC; Department of Orthopedics, College of Medicine, Taipei Medical University, Taipei, Taiwan, ROC.
| | - Ling-Chun Chen
- Department of Biotechnology and Pharmaceutical Technology, Yuanpei University of Medical Technology, Hsinchu, Taiwan, ROC.
| | - Hong-Liang Lin
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan, ROC.
| | - Der-Zen Liu
- Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan, ROC.
| | - Hsiu-O Ho
- School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei, Taiwan, ROC.
| | - Ming-Thau Sheu
- School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei, Taiwan, ROC.
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Wang S, Zhang K. Glycosylated cellulose derivatives with regioselective distributions of pendant glucose moieties. Carbohydr Polym 2018; 196:154-161. [PMID: 29891282 DOI: 10.1016/j.carbpol.2018.05.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 04/26/2018] [Accepted: 05/12/2018] [Indexed: 11/29/2022]
Abstract
Inspired by the presence of diverse carbohydrates on the surface of biological systems, we present herein a method for the synthesis of sugar-bearing polymers derived from renewable cellulose. In this paper, novel glycosylated cellulose derivatives were successfully synthesized containing a series of subsequent reactions: (1) synthesis of cellulose derivatives with pendant hydroxyl groups via nucleophilic substitution; (2) further sequential reactions containing a novel TEMPO/[bis(acetoxy)iodo]benzene (BAIB)-mediated oxidation of pendant hydroxyl groups, Schiff base formation and reduction in one-pot reaction; and (3) thiol-ene click reaction as an efficient tool to generate cellulose derivatives with pendant glucosyl groups. Furthermore, the glucosyl groups were only linked with the C6 position of anhydroglucose units (AGUs) of cellulose. Moreover, the glycosylated cellulose derivatives could be reversibly cross-linked by 1,4-phenylenediboronic acid at pH 10 and dissociated into single polymer chains by using glucose, which allow such glycolated cellulose derivatives to be interesting responsive materials.
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Affiliation(s)
- Shuang Wang
- Wood Technology and Wood Chemistry, Georg-August-Universität Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
| | - Kai Zhang
- Wood Technology and Wood Chemistry, Georg-August-Universität Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany.
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15
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Ventura C, Lourenço AF, Sousa-Uva A, Ferreira PJ, Silva MJ. Evaluating the genotoxicity of cellulose nanofibrils in a co-culture of human lung epithelial cells and monocyte-derived macrophages. Toxicol Lett 2018; 291:173-183. [PMID: 29679712 DOI: 10.1016/j.toxlet.2018.04.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 04/12/2018] [Accepted: 04/14/2018] [Indexed: 02/08/2023]
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Laccase-TEMPO-mediated air oxidation of galactomannan for use as paper strengthening agent. Carbohydr Polym 2018; 184:94-99. [DOI: 10.1016/j.carbpol.2017.12.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/27/2017] [Accepted: 12/18/2017] [Indexed: 11/22/2022]
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17
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Mendoza L, Batchelor W, Tabor RF, Garnier G. Gelation mechanism of cellulose nanofibre gels: A colloids and interfacial perspective. J Colloid Interface Sci 2018; 509:39-46. [DOI: 10.1016/j.jcis.2017.08.101] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 08/24/2017] [Accepted: 08/24/2017] [Indexed: 11/15/2022]
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18
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Dai L, Chen J, Yang B, Su Y, Chen L, Long Z, Ni Y. TEMPO-Oxidized Waste Cellulose as Reinforcement for Recycled Fiber Networks. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b04135] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lei Dai
- College
of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
- Department
of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada
| | - Jie Chen
- Key
Laboratory of Eco-textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Bo Yang
- Department
of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada
| | - Yanqun Su
- Department
of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada
- China National Pulp and Paper Research Institute, Beijing 100102, China
| | - Le Chen
- Key
Laboratory of Eco-textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Zhu Long
- Key
Laboratory of Eco-textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Yonghao Ni
- Department
of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada
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19
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Anany H, Brovko L, El Dougdoug NK, Sohar J, Fenn H, Alasiri N, Jabrane T, Mangin P, Monsur Ali M, Kannan B, Filipe CDM, Griffiths MW. Print to detect: a rapid and ultrasensitive phage-based dipstick assay for foodborne pathogens. Anal Bioanal Chem 2017; 410:1217-1230. [PMID: 28940009 DOI: 10.1007/s00216-017-0597-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 07/17/2017] [Accepted: 08/21/2017] [Indexed: 12/15/2022]
Abstract
Foodborne pathogens are a burden to the economy and a constant threat to public health. The ability to rapidly detect the presence of foodborne pathogens is a vital component of any strategy towards establishing a safe and secure food supply chain. Bacteriophages (phages) are viruses capable of infecting and replicating within bacteria in a strain-specific manner. The ubiquitous and selective nature of phages makes them ideal for the detection and biocontrol of bacteria. Therefore, the objective of this research was to develop and test a phage-based paper dipstick biosensor for the detection of various foodborne pathogens in food matrices. The first step was to identify the best method for immobilizing phages on paper such that their biological activity (infectivity) was preserved. It was found that piezoelectric inkjet printing resulted in lower loss of phage infectivity when compared with other printing methods (namely gravure and blade coating) and that ColorLok paper was ideally suited to create functional sensors. The phage-based bioactive papers developed with use of piezoelectric inkjet printing actively lysed their target bacteria and retained this antibacterial activity for up to 1 week when stored at room temperature and 80% relative humidity. These bioactive paper strips in combination with quantitative real-time PCR were used for quantitative determination of target bacteria in broth and food matrices. A phage dipstick was used to capture and infect Escherichia coli O157:H7, E. coli O45:H2, and Salmonella Newport in spinach, ground beef and chicken homogenates, respectively, and quantitative real-time PCR was used to detect the progeny phages. A detection limit of 10-50 colony-forming units per millilitre was demonstrated with a total assay time of 8 h, which was the duration of a typical work shift in an industrial setting. This detection method is rapid and cost-effective, and may potentially be applied to a broad range of bacterial foodborne pathogens. Graphical abstract ᅟ.
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Affiliation(s)
- Hany Anany
- Agriculture and Agri-Food Canada, Guelph Research and Development Center, 93 Stone Road West, Guelph, ON, N1G 5C9, Canada. .,Canadian Research Institute for Food Safety, Food Science Department, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada.
| | - Lubov Brovko
- Canadian Research Institute for Food Safety, Food Science Department, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Noha K El Dougdoug
- Faculty of Science, Benha University, Fareed Nada Street, Benha, 13511, Egypt
| | - Jennifer Sohar
- Canadian Research Institute for Food Safety, Food Science Department, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Heather Fenn
- Canadian Research Institute for Food Safety, Food Science Department, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Nada Alasiri
- Canadian Research Institute for Food Safety, Food Science Department, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Tarik Jabrane
- Université du Québec à Trois-Rivières, 3351 Boulevard des Forges, Trois-Rivières, QC, G9A 5H7, Canada
| | - Patrice Mangin
- Université du Québec à Trois-Rivières, 3351 Boulevard des Forges, Trois-Rivières, QC, G9A 5H7, Canada
| | - M Monsur Ali
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7, Canada
| | - Balamurali Kannan
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7, Canada
| | - Carlos D M Filipe
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7, Canada
| | - Mansel W Griffiths
- Canadian Research Institute for Food Safety, Food Science Department, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada.
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20
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Cellulose oxidation by Laccase-TEMPO treatments. Carbohydr Polym 2017; 157:1488-1495. [DOI: 10.1016/j.carbpol.2016.11.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 10/25/2016] [Accepted: 11/10/2016] [Indexed: 11/22/2022]
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21
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Fujiwara K, Kuwahara Y, Sumida Y, Yamashita H. Fabrication of Photocatalytic Paper Using TiO 2 Nanoparticles Confined in Hollow Silica Capsules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:288-295. [PMID: 28004939 DOI: 10.1021/acs.langmuir.6b04003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
TiO2 nanoparticles (NPs) encapsulated in hollow silica spheres (TiO2@HSSs) show a shielding-effect that can insulate photocatalytically active TiO2 NPs from the surrounding environment and thus prohibit the self-degradation of organic support materials under ultraviolet (UV)-light irradiation. In this study, photocatalytically active papers were fabricated by combining TiO2@HSS and cellulose fibers, and their photocatalytic activities and durability under UV-light irradiation were examined. The yolk-shell nanostructured TiO2@HSS, which has an ample void space between inner TiO2 NPs and an outer silica shell, was synthesized using a facile single-step method utilizing an oil-in-water microemulsion as an organic template. The thus-prepared TiO2@HSS particles were deposited onto a cellulose paper either by the chemical adhesion process via ionic bonding or by the physical adhesion process using a dual polymer system. The obtained paper containing TiO2@HSS particles with high air permeability exhibited a higher photocatalytic activity in the photocatalytic decomposition of volatile organic compounds than unsupported powdery TiO2@HSS particles because of the uniform dispersion on the paper with a reticular fiber network. In addition, the paper was hardly damaged under UV-light irradiation, whereas the paper containing naked TiO2 NPs showed a marked deterioration with a considerably decreased strength, owing to the ability of the silica shell to prevent direct contact between TiO2 and organic fibers. This study can offer a promising method to fabricate photocatalytically active papers with a photoresistance property available for real air cleaning.
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Affiliation(s)
- Kensei Fujiwara
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Paper Technology Center, Ehime Institute of Industrial Technology , 127 Mendori-cho, Shikokuchuo, Ehime 799-0113, Japan
| | - Yasutaka Kuwahara
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University , Katsura, Kyoto 615-8520, Japan
| | - Yuki Sumida
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiromi Yamashita
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University , Katsura, Kyoto 615-8520, Japan
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22
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Wu T, Du Y, Yan N, Farnood R. Cellulose fiber networks reinforced with glutaraldehyde-chitosan complexes. J Appl Polym Sci 2015. [DOI: 10.1002/app.42375] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tongfei Wu
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; 200 College Street Toronto Ontario Canada M5S3E5
| | - Yicheng Du
- Faculty of Forestry; University of Toronto; 33 Willcocks Street Toronto Ontario Canada M5S3B3
| | - Ning Yan
- Faculty of Forestry; University of Toronto; 33 Willcocks Street Toronto Ontario Canada M5S3B3
| | - Ramin Farnood
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; 200 College Street Toronto Ontario Canada M5S3E5
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23
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Picheth GF, Sierakowski MR, Woehl MA, Pirich CL, Schreiner WH, Pontarolo R, de Freitas RA. Characterisation of ultra-thin films of oxidised bacterial cellulose for enhanced anchoring and build-up of polyelectrolyte multilayers. Colloid Polym Sci 2013. [DOI: 10.1007/s00396-013-3048-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Aarne N, Vesterinen AH, Kontturi E, Seppälä J, Laine J. A Systematic Study of Noncross-linking Wet Strength Agents. Ind Eng Chem Res 2013. [DOI: 10.1021/ie401417e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Niko Aarne
- Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076 Aalto, Finland
| | - Arja-Helena Vesterinen
- Polymer Technology Research
Group, School of Chemical Technology, Aalto University, P.O. Box 16100, 00076 Aalto, Finland
| | - Eero Kontturi
- Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076 Aalto, Finland
| | - Jukka Seppälä
- Polymer Technology Research
Group, School of Chemical Technology, Aalto University, P.O. Box 16100, 00076 Aalto, Finland
| | - Janne Laine
- Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076 Aalto, Finland
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25
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Khan IA, Berge ND, Sabo-Attwood T, Ferguson PL, Saleh NB. Single-walled carbon nanotube transport in representative municipal solid waste landfill conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:8425-8433. [PMID: 23815465 DOI: 10.1021/es401748f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Single-walled carbon nanotubes (SWNTs) are being used in many consumer products and devices. It is likely that as some of these products reach the end of their useful life, they will be discarded in municipal solid waste landfills. However, there has been little work evaluating the fate of nanomaterials in solid waste environments. The purpose of this study is to systematically evaluate the influence of organic matter type and concentration in landfill-relevant conditions on SWNT transport through a packed-bed of mixed municipal solid waste collectors. The influence of individual waste materials on SWNT deposition is also evaluated. Transport experiments were conducted through saturated waste-containing columns over a range of simulated leachate conditions representing both mature and young leachates. Results indicate that SWNT transport may be significant in mature waste environments, with mobility decreasing with decreasing humic acid concentration. SWNT mobility in the presence of acetic acid was inhibited, suggesting their mobility in young waste environments may be small. SWNTs also exhibited collector media-dependent transport, with greatest transport in glass and least in paper. These results represent the first study evaluating how leachate age and changes in waste composition influence potential SWNT mobility in landfills.
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Affiliation(s)
- Iftheker A Khan
- Department of Civil and Environmental Engineering, University of South Carolina , Columbia, South Carolina 29208, United States
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26
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Liu J, Pelton R, Obermeyer JM, Esser A. Laccase complex with polyvinylamine bearing grafted TEMPO is a cellulose adhesion primer. Biomacromolecules 2013; 14:2953-60. [PMID: 23841801 DOI: 10.1021/bm4009827] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Polyelectrolyte complexes formed between laccase and polyvinylamine with grafted TEMPO moieties, PVAm-T, adsorb onto cellulose, causing oxidation. All evidence supports the view that aldehyde groups on oxidized cellulose condense with primary amine groups, giving a grafted layer of PVAm-T complexed with laccase. The grafted PVAm-T serves as a primer layer promoting wet cellulose-to-cellulose adhesion in the presence of PVAm adhesive. The cellulose modification occurs at ambient temperatures and pH 5. The adhesion improvements with mixtures of PVAm-T and laccase are remarkable because both components are macromolecular, which should inhibit the ability of the TEMPO to act as a shuttle between the enzyme and the primary hydroxyl groups on cellulose. It is proposed that PVAm-bound oxoammonium ions exchange with neighboring TEMPO moieties, providing a mechanism for the transfer of oxidation activity from immobilized enzyme to the cellulose surfaces.
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Affiliation(s)
- Jieyi Liu
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada
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27
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Affiliation(s)
- Quan Wen
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4L7
| | - Robert Pelton
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4L7
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28
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Mosse WKJ, Boger DV, Simon GP, Garnier G. Effect of cationic polyacrylamides on the interactions between cellulose fibers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:3641-3649. [PMID: 22316050 DOI: 10.1021/la2049579] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The interaction between cellulose fibers in the presence of cationic polyacrylamide (CPAM) was analyzed by rheology as a function of polyelectrolyte concentration, charge density, and molecular weight. CPAM was found to strongly influence the yield stress of cellulose suspensions; low doses of CPAM increased the yield stress, but at higher concentrations the yield stress declined. The charge density of the CPAM was the most significant factor in how yield stress responded to CPAM concentration; this effect was able to be normalized to a master curve by considering only the charged fraction of the polymer. The molecular weight of CPAM samples had some effect at high concentrations, but for lower CPAM doses the yield stress was independent of molecular weight over the range studied. The data suggest that CPAM modifies the interaction between cellulose surfaces via several mechanisms, with electrostatic interactions in the form of charge neutralization and charged patch formation dominating; polymer bridging and steric repulsion also influence the overall balance of forces between interacting cellulose fibers.
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Affiliation(s)
- Wade K J Mosse
- BioPRIA, Australian Pulp & Paper Institute, Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia.
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29
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Song J, Jin Y, Fu G, He A, Fu W. A facile approach toward surface sulfonation of natural cotton fibers through epoxy reaction. J Appl Polym Sci 2011. [DOI: 10.1002/app.35180] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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30
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31
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Pelton R, Ren P, Liu J, Mijolovic D. Polyvinylamine-graft-TEMPO Adsorbs onto, Oxidizes, and Covalently Bonds to Wet Cellulose. Biomacromolecules 2011; 12:942-8. [DOI: 10.1021/bm200101b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert Pelton
- Department of Chemical Engineering, McMaster University, Hamilton, Canada
| | - Pengchao Ren
- Department of Chemical Engineering, McMaster University, Hamilton, Canada
| | - Jieyi Liu
- Department of Chemical Engineering, McMaster University, Hamilton, Canada
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Abstract
Native wood celluloses can be converted to individual nanofibers 3-4 nm wide that are at least several microns in length, i.e. with aspect ratios>100, by TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated oxidation and successive mild disintegration in water. Preparation methods and fundamental characteristics of TEMPO-oxidized cellulose nanofibers (TOCN) are reviewed in this paper. Significant amounts of C6 carboxylate groups are selectively formed on each cellulose microfibril surface by TEMPO-mediated oxidation without any changes to the original crystallinity (∼74%) or crystal width of wood celluloses. Electrostatic repulsion and/or osmotic effects working between anionically-charged cellulose microfibrils, the ζ-potentials of which are approximately -75 mV in water, cause the formation of completely individualized TOCN dispersed in water by gentle mechanical disintegration treatment of TEMPO-oxidized wood cellulose fibers. Self-standing TOCN films are transparent and flexible, with high tensile strengths of 200-300 MPa and elastic moduli of 6-7 GPa. Moreover, TOCN-coated poly(lactic acid) films have extremely low oxygen permeability. The new cellulose-based nanofibers formed by size reduction process of native cellulose fibers by TEMPO-mediated oxidation have potential application as environmentally friendly and new bio-based nanomaterials in high-tech fields.
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Affiliation(s)
- Akira Isogai
- Department of Biomaterial Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan.
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33
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Ishizuka M, Saito T, Enomae T, Isogai A. Papermaking of Disintegrated Fibers of TEMPO-mediated Oxidized Pulps. ACTA ACUST UNITED AC 2010. [DOI: 10.2524/jtappij.64.437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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34
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Miao C, Chen X, Pelton R. Adhesion of Poly(vinylamine) Microgels to Wet Cellulose. Ind Eng Chem Res 2007. [DOI: 10.1021/ie0705608] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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35
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Saito T, Kimura S, Nishiyama Y, Isogai A. Cellulose Nanofibers Prepared by TEMPO-Mediated Oxidation of Native Cellulose. Biomacromolecules 2007; 8:2485-91. [PMID: 17630692 DOI: 10.1021/bm0703970] [Citation(s) in RCA: 976] [Impact Index Per Article: 57.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Never-dried and once-dried hardwood celluloses were oxidized by a 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated system, and highly crystalline and individualized cellulose nanofibers, dispersed in water, were prepared by mechanical treatment of the oxidized cellulose/water slurries. When carboxylate contents formed from the primary hydroxyl groups of the celluloses reached approximately 1.5 mmol/g, the oxidized cellulose/water slurries were mostly converted to transparent and highly viscous dispersions by mechanical treatment. Transmission electron microscopic observation showed that the dispersions consisted of individualized cellulose nanofibers 3-4 nm in width and a few microns in length. No intrinsic differences between never-dried and once-dried celluloses were found for preparing the dispersion, as long as carboxylate contents in the TEMPO-oxidized celluloses reached approximately 1.5 mmol/g. Changes in viscosity of the dispersions during the mechanical treatment corresponded with those in the dispersed states of the cellulose nanofibers in water.
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Affiliation(s)
- Tsuguyuki Saito
- Department of Biomaterials Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
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36
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Feng X, Pouw K, Leung V, Pelton R. Adhesion of Colloidal Polyelectrolyte Complexes to Wet Cellulose. Biomacromolecules 2007; 8:2161-6. [PMID: 17569560 DOI: 10.1021/bm070307r] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The adhesion of wet regenerated cellulose to colloidal complexes formed between carboxymethyl cellulose (CMC) and polyvinylamine (PVAm) was evaluated by measuring the force to delaminate pairs of regenerated cellulose membranes bound together with polyelectrolyte complex. The most important parameter was the surface composition of the colloidal complex particles. High delamination forces corresponded to using complexes coated with excess PVAm whereas low adhesion was observed for both CMC coated complexes and complexes in which the PVAm was replaced with polymer bearing quaternary amine groups. Adhesion with complexes was highest at pH 4 and rather insensitive to pH from 6 to 9. Finally, mild TEMPO/NaBr/NaClO oxidation of the cellulose gave much stronger adhesion when PVAm was in excess but not with the CMC rich complexes.
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Affiliation(s)
- Xianhua Feng
- Department of Chemical Engineering, JHE-136, McMaster University, Hamilton, Ontario, Canada
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