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Study on chemical structure stability and properties of chitosan-incorporated tamarind seed kernel xyloglucan hydrogels
(2024-12-05)
Manamoongmongkol, Kanjana
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Sriprom, Pongsert
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Narkrugsa, Woatthichai
;
Phumjan, Lamphung
;
Permana, Lasuardi
This study investigated the stability of chitosan-incorporated tamarind seed kernel xyloglucan hydrogels prepared at different ratios after storage for three years. The physical hydrogel samples were studied using ratios of xyloglucan to chitosan between 1.5:1 and 4:1, comparing fresh hydrogel with hydrogel stored for three years. The hydrogels were analyzed for Fourier transform infrared characteristics, rheological behavior, flow rate, and zeta potential. After three years of storage, a reversible reaction was confirmed by C-H molecular stretching using Fourier transform infrared. All hydrogel samples exhibited pseudoplastic fluid characteristics with liquid-like behavior. The zeta potential of fresh hydrogel at 1.5:1 and 4:1 ratios was 27.700 ± 0.964 mV and 22.633 ± 0.929 mV, respectively, whereas after three years, it became 28.067 ± 1.106 mV and 18.867 ± 0.503 mV, respectively. The amount of xyloglucan significantly affected the zeta potential of the xyloglucan-chitosan hydrogel, leading to a decrease in the stability of the hydrogel at a 4:1 ratio. The stability of the hydrogel at a ratio of 1.5:1 was confirmed by pH and zeta potential measurements. In conclusion, the properties and behavior of the xyloglucan-chitosan hydrogel remained stable after three years of storage at a 1.5:1 ratio.
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Characterization and Self-Cleaning Properties of Silk Fabric Coated by Chitosan-Xyloglucan/nano-TiO2 Composite Film
(2024-01-01)
Lampang, Chaiyawat Na
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Sriprom, Pongsert
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Manamoongmongkol, Kanjana
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Assawasaengrat, Pornsawan
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Narkrugsa, Woatthichai
In this study, Chitosan-Xyloglucan encapsulated Titanium dioxide was prepared by in-situ method for coating Silk fabric. FT-IR XRD characterized the functional groups and formation of crystallization of composite film. SEM analysis showed the immobilization of composite film on the surface of silk fabric. The coated silk fabrics were stained with methylene blue, and the stain removal efficiency was evaluated. The results showed that the composite film was deposited onto the silk fabric. The functional groups showed peaks around 1635 to 1636 and 400 to 500 cm-1 that indicate the presence of C=N groups of Chitosan-Xyloglucan and Ti-O groups of TiO<inf>2</inf> on the composite, respectively. The XRD results indicated that the TiO<inf>2</inf> prepared by the sol-gel method was an anatase crystalline structure. The mechanical properties showed the composite film was superior to the Chitosan-Xyloglucan, TiO<inf>2</inf>, and uncoated silk fabric. Finally, the methylene blue degradation capability was investigated. The coated silk fabric has insignificantly removing methylene blue stain than the untreated silk fabric, but it is noticeably repellent to stain.
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Production of antimicrobial film-reinforced purified cellulose derived from bamboo shoot shell
(2023-06-01)
Manamoongmongkol, Kanjana
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Sriprom, Pongsert
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Phumjan, Lamphung
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Permana, Lasuardi
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Assawasaengrat, Pornsawan
In this paper aimed to enhance the mechanical properties of an antimicrobial film by incorporating purified cellulose obtained from bamboo shoot shells into a chitosan matrix. Films with varying amounts of cellulose (0%w/v, 0.2%w/v, and 0.4%w/v) were investigated. Results indicated that the chitosan film reinforced 0.4%w/v cellulose exhibited higher tensile strength (43.50 MPa) and elongation at break (39.40 %) compared to the film without cellulose (34.47 MPa, 18.27 %). Additionally, the film with 0.4%w/v cellulose showed antimicrobial activity against B. cereus (MIC 12.5 mg/mL), S. aureus (MIC 6.25 mg/mL), E. coli (MIC 6.25 mg/mL), and exhibited 68.67 % inhibition of Fusarium oxysporum. Due to its biodegradability, favorable mechanical properties, and strong antimicrobial ability, the cellulose-chitosan film presents a promising alternative to be applied in the food industry, such as in packaging of dried food or as a coating film.
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Preparation, characterization, and antimicrobial activity of xyloglucan-chitosan film from tamarind (tamarind indica L.) seed kernel
(2023-06-01)
Adair, Pornpatu
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Sriprom, Pongsert
;
Narkrugsa, Woatthichai
;
Phumjan, Lamphung
;
Manamoongmongkol, Kanjana
Xyloglucan from tamarind seed kernel powder and chitosan were prepared using acetic acid as an oxidizing agent to form a xyloglucan-chitosan film. This study evaluated the properties of xyloglucan-chitosan films with different loading ratios of xyloglucan using various analytical tools. The covalent bonds formed by the oxidized xyloglucan and chitosan were confirmed by FTIR analysis. Morphological analysis using SEM indicated the formation of a conventional covalent bond in the xyloglucan-chitosan film. The water vapor transmission rate in the xyloglucan-chitosan film was reduced significantly with increasing xyloglucan ratio. Conversely, the increase in the xyloglucan ratio improved the film's mechanical properties (tensile strength = 1.84 ± 0.06<sup>a</sup> MPa, elongation at break = 22.47 ± 0.65<sup>a</sup> %). Furthermore, due to the antimicrobial activity of chitosan, the xyloglucan-chitosan film exhibits intense antimicrobial activity. Therefore, the xyloglucan-chitosan film demonstrated good properties for biodegradable food packaging.

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