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Mazlan NSN, Salleh KM, Khairunnisa-Atiqah MK, Ainul Hafiza AH, Mostapha M, Ellis AV, Zakaria S. Macro-Size Regenerated Cellulose Fibre Embedded with Graphene Oxide with Antibacterial Properties. Polymers (Basel) 2023; 15:polym15010230. [PMID: 36616578 PMCID: PMC9824509 DOI: 10.3390/polym15010230] [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: 07/08/2022] [Revised: 08/29/2022] [Accepted: 09/06/2022] [Indexed: 01/03/2023] Open
Abstract
Macro-size regenerated cellulose fibres (RCFs) with embedded graphene oxide (GO) were fabricated by dissolving cellulose in a pre-cooled sodium hydroxide (NaOH)/urea solution and regenerated in sulphuric acid (H2SO4) coagulant. Initially, GO was found to disperse well in the cellulose solution due to intercalation with the cellulose; however, this cellulose-GO intercalation was disturbed during the regeneration process, causing agglomeration of GO in the RCF mixture. Agglomerated GO was confirmed at a higher GO content under a Dino-Lite microscope. The crystallinity index (CrI) and thermal properties of the RCFs increased with increasing GO loadings, up to 2 wt.%, and reduced thereafter. Cellulose-GO intercalation was observed at lower GO concentrations, which enhanced the crystallinity and thermal properties of the RCF-GO composite. It was shown that the GO exhibited antibacterial properties in the RCF-GO composite, with the highest bacterial inhibition against E. coli and S. aureus.
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Affiliation(s)
- Nyak Syazwani Nyak Mazlan
- Bioresource and Biorefinery Laboratory, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
| | - Kushairi Mohd Salleh
- Bioresource Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
- Renewable Biomass Transformation Cluster, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
- Correspondence: (K.M.S.); (S.Z.)
| | | | - Abdul Hair Ainul Hafiza
- Bioresource and Biorefinery Laboratory, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
- Centre of Foundation Studies, Universiti Teknologi MARA, Cawangan Selangor, Kampus Dengkil, Dengkil 43800, Malaysia
| | - Marhaini Mostapha
- Centre of Health Economic Research, Institute Health System Research, National Institute of Health Malaysia, Shah Alam 40171, Malaysia
| | - Amanda V. Ellis
- Department of Chemical Engineering, The University of Melbourne, Grattan Street, Parkville, VIC 3010, Australia
| | - Sarani Zakaria
- Bioresource and Biorefinery Laboratory, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
- Correspondence: (K.M.S.); (S.Z.)
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Preparation of an Active Dressing by In Situ Biosynthesis of a Bacterial Cellulose–Graphene Oxide Composite. Polymers (Basel) 2022; 14:polym14142864. [PMID: 35890640 PMCID: PMC9321042 DOI: 10.3390/polym14142864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/06/2022] [Accepted: 07/12/2022] [Indexed: 01/06/2023] Open
Abstract
This paper presents a simple method of obtaining a bacterial cellulose (BC) composite with the addition of graphene oxide (GO) using an in situ method and studies the influence of GO nanoparticles on the structure and properties of the obtained membranes. Microorganisms obtained from Golden Delicious apple vinegar were used to obtain the BC. During the biosynthesis, GO was introduced in the amounts of 3.7, 5.4 and 7.1% w/w. The resulting BC/GO composite was characterized by high water content (~400%), a thickness of about 1.1 mm (in wet form) and a cellulose nanofiber diameter of ~100 nm. The possibility of using the resulting composite membranes as potential active dressings with the sustained-release analgesic medicine—paracetamol—was investigated. The BC/GO composite membranes were characterized by a medicine sorption of 60 mg/g of BC, a slow desorption time, a constant medicine concentration over time and an 80% paracetamol release rate after 24 h. The morphology of membrane surfaces and cross-sections were examined by means of scanning electron microscopy (SEM). Infrared spectroscopy (FTIR), X-ray structure studies (WAXS) as well as thermal analysis (TGA) demonstrated the presence of GO in the BC matrix and interactions between the matrix and the additive.
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Petry R, Silvestre GH, Focassio B, Crasto de Lima F, Miwa RH, Fazzio A. Machine Learning of Microscopic Ingredients for Graphene Oxide/Cellulose Interaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1124-1130. [PMID: 35026945 DOI: 10.1021/acs.langmuir.1c02780] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Understanding the role of microscopic attributes in nanocomposites allows one to control and, therefore, accelerate experimental system designs. In this work, we extracted the relevant parameters controlling the graphene oxide binding strength to cellulose by combining first-principles calculations and machine learning algorithms. We were able to classify the systems among two classes with higher and lower binding energies, which are well defined based on the isolated graphene oxide features. Using theoretical X-ray photoelectron spectroscopy analysis, we show the extraction of these relevant features. In addition, we demonstrate the possibility of refined control within a machine learning regression between the binding energy values and the system's characteristics. Our work presents a guiding map to control graphene oxide/cellulose interaction.
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Affiliation(s)
- Romana Petry
- Brazilian Nanotechnology National Laboratory, CNPEM, Campinas, São Paulo 13083-970, Brazil
- Center for Natural and Human Sciences, Federal University of ABC (UFABC), Santo André, São Paulo 09210-580, Brazil
| | - Gustavo H Silvestre
- Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais 38400-902, Brazil
| | - Bruno Focassio
- Brazilian Nanotechnology National Laboratory, CNPEM, Campinas, São Paulo 13083-970, Brazil
- Center for Natural and Human Sciences, Federal University of ABC (UFABC), Santo André, São Paulo 09210-580, Brazil
| | - Felipe Crasto de Lima
- Brazilian Nanotechnology National Laboratory, CNPEM, Campinas, São Paulo 13083-970, Brazil
- Ilum School of Science, CNPEM, Campinas, São Paulo 13083-970, Brazil
| | - Roberto H Miwa
- Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais 38400-902, Brazil
| | - Adalberto Fazzio
- Brazilian Nanotechnology National Laboratory, CNPEM, Campinas, São Paulo 13083-970, Brazil
- Center for Natural and Human Sciences, Federal University of ABC (UFABC), Santo André, São Paulo 09210-580, Brazil
- Ilum School of Science, CNPEM, Campinas, São Paulo 13083-970, Brazil
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Zou X, Li M, Xiao H, Zhou S, Chen C, Zhao Y. Simulation study on real laminar assembly of g-C3N4 high performance free standing membrane with bio-based materials. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119598] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kosmulski M. The pH dependent surface charging and points of zero charge. IX. Update. Adv Colloid Interface Sci 2021; 296:102519. [PMID: 34496320 DOI: 10.1016/j.cis.2021.102519] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 01/23/2023]
Abstract
of the points of zero charge (PZC) and isoelectric points (IEP) of various materials published in the recent literature and of older results overlooked in the previous compilations. The roles of experimental conditions, especially of the temperature, of the nature and concentration of supporting electrolyte, and of the type of apparatus are emphasized. The newest results are compared with the zero points reported in previous reviews. Most recent studies were carried out with materials whose pH dependent surface charging is already well-documented, and the newest results are consistent with the older literature. Isoelectric points of Gd(OH)3, Sm(OH)3, and TeO2 have been reported for the first time in the recent literature.
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Affiliation(s)
- Marek Kosmulski
- Lublin University of Technology, Nadbystrzycka 38, PL-20618 Lublin, Poland.
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