Effect of alkali-silica treatments of miscanthus fibres on chemical and micro-morphological modifications
Chemical treatments can remove waxes and sugar components from the surface of bio-fibres, increasing their compatibility with mineral binders. This paper investigates the effects of alkali solutions treatments on miscanthus shives. For 8, 24, and 48 h, fibres were immersed in NaOH solutions at 1.5,...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-06-01
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| Series: | Cleaner Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772397623000151 |
| _version_ | 1797803839377637376 |
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| author | Fabrice Ntimugura Kyra Wilson Raffaele Vinai Pete Walker |
| author_facet | Fabrice Ntimugura Kyra Wilson Raffaele Vinai Pete Walker |
| author_sort | Fabrice Ntimugura |
| collection | DOAJ |
| description | Chemical treatments can remove waxes and sugar components from the surface of bio-fibres, increasing their compatibility with mineral binders. This paper investigates the effects of alkali solutions treatments on miscanthus shives. For 8, 24, and 48 h, fibres were immersed in NaOH solutions at 1.5, 2.5, and 5.0% concentrations, with and without a 2.5% sodium silicate solution, having a silica modulus (SiO2/Na2O) of 2.0. SEM and Fourier Transform Infrared Spectroscopy (ATR-FTIR) were used to investigate the effect of different treatments on the microstructure and surface chemistry of miscanthus. The SEM results show that the morphologies of miscanthus fibres were significantly altered in the case of 5.0% NaOH treatment, with a weakening of the inner cell structures in some locations. Furthermore, the ATR-FTIR patterns of raw and treated shives were analysed, suggesting that treating miscanthus with 2.5% NaOH and 2.5% sodium silicate results in the required chemical modifications while retaining the cellular structure of miscanthus fibres. For all treatments, the absorbance was reduced by 31 to 77% at 450 cm−1 and 48–80% at 1035 cm−1. |
| first_indexed | 2024-03-13T05:27:04Z |
| format | Article |
| id | doaj.art-0fcdfe29dd234fd2a7961f2e3c48bf87 |
| institution | Directory Open Access Journal |
| issn | 2772-3976 |
| language | English |
| last_indexed | 2024-03-13T05:27:04Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cleaner Materials |
| spelling | doaj.art-0fcdfe29dd234fd2a7961f2e3c48bf872023-06-15T04:57:32ZengElsevierCleaner Materials2772-39762023-06-018100182Effect of alkali-silica treatments of miscanthus fibres on chemical and micro-morphological modificationsFabrice Ntimugura0Kyra Wilson1Raffaele Vinai2Pete Walker3College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK; Corresponding author.WSP, Development Infrastructure Department, London WC2A 1AF, UKCollege of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UKDepartment of Architecture and Civil Engineering, University of Bath, Bath BA2 7AY, UKChemical treatments can remove waxes and sugar components from the surface of bio-fibres, increasing their compatibility with mineral binders. This paper investigates the effects of alkali solutions treatments on miscanthus shives. For 8, 24, and 48 h, fibres were immersed in NaOH solutions at 1.5, 2.5, and 5.0% concentrations, with and without a 2.5% sodium silicate solution, having a silica modulus (SiO2/Na2O) of 2.0. SEM and Fourier Transform Infrared Spectroscopy (ATR-FTIR) were used to investigate the effect of different treatments on the microstructure and surface chemistry of miscanthus. The SEM results show that the morphologies of miscanthus fibres were significantly altered in the case of 5.0% NaOH treatment, with a weakening of the inner cell structures in some locations. Furthermore, the ATR-FTIR patterns of raw and treated shives were analysed, suggesting that treating miscanthus with 2.5% NaOH and 2.5% sodium silicate results in the required chemical modifications while retaining the cellular structure of miscanthus fibres. For all treatments, the absorbance was reduced by 31 to 77% at 450 cm−1 and 48–80% at 1035 cm−1.http://www.sciencedirect.com/science/article/pii/S2772397623000151Bio-based materialsFTIR techniqueMicrostructureMiscanthusAlkali-treatment |
| spellingShingle | Fabrice Ntimugura Kyra Wilson Raffaele Vinai Pete Walker Effect of alkali-silica treatments of miscanthus fibres on chemical and micro-morphological modifications Cleaner Materials Bio-based materials FTIR technique Microstructure Miscanthus Alkali-treatment |
| title | Effect of alkali-silica treatments of miscanthus fibres on chemical and micro-morphological modifications |
| title_full | Effect of alkali-silica treatments of miscanthus fibres on chemical and micro-morphological modifications |
| title_fullStr | Effect of alkali-silica treatments of miscanthus fibres on chemical and micro-morphological modifications |
| title_full_unstemmed | Effect of alkali-silica treatments of miscanthus fibres on chemical and micro-morphological modifications |
| title_short | Effect of alkali-silica treatments of miscanthus fibres on chemical and micro-morphological modifications |
| title_sort | effect of alkali silica treatments of miscanthus fibres on chemical and micro morphological modifications |
| topic | Bio-based materials FTIR technique Microstructure Miscanthus Alkali-treatment |
| url | http://www.sciencedirect.com/science/article/pii/S2772397623000151 |
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