Control of mechanical and hydrophobic properties of silylated chitosan-starch films by cross-linking using carboxylic acids
We prepared polysaccharide films from silylated chitosan cross-linked with starch using six kinds of carboxylic acids (oxalic, maleic, citric, succinic, azelaic and sebacic acids) to explore the effects of molecular structures of cross-linkers on the mechanical, hydrophobic and water vapor permeabil...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-06-01
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| Series: | Carbohydrate Polymer Technologies and Applications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666893924000422 |
| _version_ | 1797300293060263936 |
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| author | Vivek Bisla Hideaki Yoshitake |
| author_facet | Vivek Bisla Hideaki Yoshitake |
| author_sort | Vivek Bisla |
| collection | DOAJ |
| description | We prepared polysaccharide films from silylated chitosan cross-linked with starch using six kinds of carboxylic acids (oxalic, maleic, citric, succinic, azelaic and sebacic acids) to explore the effects of molecular structures of cross-linkers on the mechanical, hydrophobic and water vapor permeability properties of these hydrophobicity-enhanced films. The films were analyzed by FT-IR, SEM, mechanical tests (stress versus strain, tensile strength and elongation at break curves) as well as the measurements of water contact angle, water solubility and water vapor permeability rate. We observed that the cross-linkers with a long chain provide a large mechanical strength; the tensile strength increases from 6 to 27 MPa with the chain length of dicarboxylates. The hydrophobicity, evaluated by the contact angle (ranging 80° ∼ 120°), increased with the chain length of the cross-linkers and was correlated well with the decreases of the solubility (94 ∼ 17%) and vapor permeability rate of water (14.5 ∼ 1.5 × 10−12 g s−1 m−1 Pa−1). We demonstrate that these mechanical, hydrophobic and water permeability properties are varied considerably only by the choice of the cross-linking acid also in the hydrophobicity-enhanced film by pre-silylation, which may widen the range of potential applications of polysaccharide film such as food packaging. |
| first_indexed | 2024-03-07T23:05:09Z |
| format | Article |
| id | doaj.art-711ecb1df9f84f96a69225a8475c5bc2 |
| institution | Directory Open Access Journal |
| issn | 2666-8939 |
| language | English |
| last_indexed | 2024-03-07T23:05:09Z |
| publishDate | 2024-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Carbohydrate Polymer Technologies and Applications |
| spelling | doaj.art-711ecb1df9f84f96a69225a8475c5bc22024-02-22T04:53:37ZengElsevierCarbohydrate Polymer Technologies and Applications2666-89392024-06-017100462Control of mechanical and hydrophobic properties of silylated chitosan-starch films by cross-linking using carboxylic acidsVivek Bisla0Hideaki Yoshitake1Division of Materials and Chemical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-Ku, Yokohama 240-8501, JapanCorresponding author.; Division of Materials and Chemical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-Ku, Yokohama 240-8501, JapanWe prepared polysaccharide films from silylated chitosan cross-linked with starch using six kinds of carboxylic acids (oxalic, maleic, citric, succinic, azelaic and sebacic acids) to explore the effects of molecular structures of cross-linkers on the mechanical, hydrophobic and water vapor permeability properties of these hydrophobicity-enhanced films. The films were analyzed by FT-IR, SEM, mechanical tests (stress versus strain, tensile strength and elongation at break curves) as well as the measurements of water contact angle, water solubility and water vapor permeability rate. We observed that the cross-linkers with a long chain provide a large mechanical strength; the tensile strength increases from 6 to 27 MPa with the chain length of dicarboxylates. The hydrophobicity, evaluated by the contact angle (ranging 80° ∼ 120°), increased with the chain length of the cross-linkers and was correlated well with the decreases of the solubility (94 ∼ 17%) and vapor permeability rate of water (14.5 ∼ 1.5 × 10−12 g s−1 m−1 Pa−1). We demonstrate that these mechanical, hydrophobic and water permeability properties are varied considerably only by the choice of the cross-linking acid also in the hydrophobicity-enhanced film by pre-silylation, which may widen the range of potential applications of polysaccharide film such as food packaging.http://www.sciencedirect.com/science/article/pii/S2666893924000422Chitosan filmsSilylationCarboxylic acidsTensile strengthWater vapor permeability |
| spellingShingle | Vivek Bisla Hideaki Yoshitake Control of mechanical and hydrophobic properties of silylated chitosan-starch films by cross-linking using carboxylic acids Carbohydrate Polymer Technologies and Applications Chitosan films Silylation Carboxylic acids Tensile strength Water vapor permeability |
| title | Control of mechanical and hydrophobic properties of silylated chitosan-starch films by cross-linking using carboxylic acids |
| title_full | Control of mechanical and hydrophobic properties of silylated chitosan-starch films by cross-linking using carboxylic acids |
| title_fullStr | Control of mechanical and hydrophobic properties of silylated chitosan-starch films by cross-linking using carboxylic acids |
| title_full_unstemmed | Control of mechanical and hydrophobic properties of silylated chitosan-starch films by cross-linking using carboxylic acids |
| title_short | Control of mechanical and hydrophobic properties of silylated chitosan-starch films by cross-linking using carboxylic acids |
| title_sort | control of mechanical and hydrophobic properties of silylated chitosan starch films by cross linking using carboxylic acids |
| topic | Chitosan films Silylation Carboxylic acids Tensile strength Water vapor permeability |
| url | http://www.sciencedirect.com/science/article/pii/S2666893924000422 |
| work_keys_str_mv | AT vivekbisla controlofmechanicalandhydrophobicpropertiesofsilylatedchitosanstarchfilmsbycrosslinkingusingcarboxylicacids AT hideakiyoshitake controlofmechanicalandhydrophobicpropertiesofsilylatedchitosanstarchfilmsbycrosslinkingusingcarboxylicacids |