Mechanical Performance of Corn Starch/Poly(Vinyl Alcohol) Composite Hydrogels Reinforced by Inorganic Nanoparticles and Cellulose Nanofibers
We investigated the mechanical properties of corn starch (CS)/poly(vinyl alcohol) (PVA)/borax hydrogels reinforced by clay platelets, silica (SiO<sub>2</sub>) nanospheres, or cellulose nanofibers (CNFs). The effects of these reinforcing agents on the tensile properties of the hydrogels w...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/8/8/514 |
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| author | Hiroyuki Takeno Rina Shikano Rin Kikuchi |
| author_facet | Hiroyuki Takeno Rina Shikano Rin Kikuchi |
| author_sort | Hiroyuki Takeno |
| collection | DOAJ |
| description | We investigated the mechanical properties of corn starch (CS)/poly(vinyl alcohol) (PVA)/borax hydrogels reinforced by clay platelets, silica (SiO<sub>2</sub>) nanospheres, or cellulose nanofibers (CNFs). The effects of these reinforcing agents on the tensile properties of the hydrogels were quite different; the fracture stress of SiO<sub>2</sub>/CS/PVA/borax composite hydrogels increased with SiO<sub>2</sub> concentration, whereas that of clay/CS/PVA/borax composite hydrogels was high at a low clay concentration but low at high clay concentrations; for CNF/CS/PVA/borax composite hydrogels, although the elastic modulus was highly enhanced by adding CNF, the fracture stress was very low because of the stress relaxation during the elongation. This result came from differences in the dispersibility of each filler and the reinforcing ability. These composite hydrogels were constructed by multi-crosslinking, such as hydrogen bonding between CS and PVA, CS and PVA crystals, complexation between borate and PVA (partly CS), and the crosslinking between each filler and polymer. The self-healing ability of SiO<sub>2</sub> and clay composite hydrogels was examined. As a result, the SiO<sub>2</sub>/CS/PVA/borax composite hydrogels possessed an excellent self-healing ability, whereas the clay/CS/PVA/borax composite hydrogels had a poor self-healing ability. |
| first_indexed | 2024-03-09T04:25:05Z |
| format | Article |
| id | doaj.art-a3b59c561d9a465fa5403f9267f0d761 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-09T04:25:05Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-a3b59c561d9a465fa5403f9267f0d7612023-12-03T13:42:19ZengMDPI AGGels2310-28612022-08-018851410.3390/gels8080514Mechanical Performance of Corn Starch/Poly(Vinyl Alcohol) Composite Hydrogels Reinforced by Inorganic Nanoparticles and Cellulose NanofibersHiroyuki Takeno0Rina Shikano1Rin Kikuchi2Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Gunma, JapanDivision of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Gunma, JapanDivision of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Gunma, JapanWe investigated the mechanical properties of corn starch (CS)/poly(vinyl alcohol) (PVA)/borax hydrogels reinforced by clay platelets, silica (SiO<sub>2</sub>) nanospheres, or cellulose nanofibers (CNFs). The effects of these reinforcing agents on the tensile properties of the hydrogels were quite different; the fracture stress of SiO<sub>2</sub>/CS/PVA/borax composite hydrogels increased with SiO<sub>2</sub> concentration, whereas that of clay/CS/PVA/borax composite hydrogels was high at a low clay concentration but low at high clay concentrations; for CNF/CS/PVA/borax composite hydrogels, although the elastic modulus was highly enhanced by adding CNF, the fracture stress was very low because of the stress relaxation during the elongation. This result came from differences in the dispersibility of each filler and the reinforcing ability. These composite hydrogels were constructed by multi-crosslinking, such as hydrogen bonding between CS and PVA, CS and PVA crystals, complexation between borate and PVA (partly CS), and the crosslinking between each filler and polymer. The self-healing ability of SiO<sub>2</sub> and clay composite hydrogels was examined. As a result, the SiO<sub>2</sub>/CS/PVA/borax composite hydrogels possessed an excellent self-healing ability, whereas the clay/CS/PVA/borax composite hydrogels had a poor self-healing ability.https://www.mdpi.com/2310-2861/8/8/514clay plateletssilica nanospherescellulose nanofibercomposite hydrogelself-healingcorn starch |
| spellingShingle | Hiroyuki Takeno Rina Shikano Rin Kikuchi Mechanical Performance of Corn Starch/Poly(Vinyl Alcohol) Composite Hydrogels Reinforced by Inorganic Nanoparticles and Cellulose Nanofibers Gels clay platelets silica nanospheres cellulose nanofiber composite hydrogel self-healing corn starch |
| title | Mechanical Performance of Corn Starch/Poly(Vinyl Alcohol) Composite Hydrogels Reinforced by Inorganic Nanoparticles and Cellulose Nanofibers |
| title_full | Mechanical Performance of Corn Starch/Poly(Vinyl Alcohol) Composite Hydrogels Reinforced by Inorganic Nanoparticles and Cellulose Nanofibers |
| title_fullStr | Mechanical Performance of Corn Starch/Poly(Vinyl Alcohol) Composite Hydrogels Reinforced by Inorganic Nanoparticles and Cellulose Nanofibers |
| title_full_unstemmed | Mechanical Performance of Corn Starch/Poly(Vinyl Alcohol) Composite Hydrogels Reinforced by Inorganic Nanoparticles and Cellulose Nanofibers |
| title_short | Mechanical Performance of Corn Starch/Poly(Vinyl Alcohol) Composite Hydrogels Reinforced by Inorganic Nanoparticles and Cellulose Nanofibers |
| title_sort | mechanical performance of corn starch poly vinyl alcohol composite hydrogels reinforced by inorganic nanoparticles and cellulose nanofibers |
| topic | clay platelets silica nanospheres cellulose nanofiber composite hydrogel self-healing corn starch |
| url | https://www.mdpi.com/2310-2861/8/8/514 |
| work_keys_str_mv | AT hiroyukitakeno mechanicalperformanceofcornstarchpolyvinylalcoholcompositehydrogelsreinforcedbyinorganicnanoparticlesandcellulosenanofibers AT rinashikano mechanicalperformanceofcornstarchpolyvinylalcoholcompositehydrogelsreinforcedbyinorganicnanoparticlesandcellulosenanofibers AT rinkikuchi mechanicalperformanceofcornstarchpolyvinylalcoholcompositehydrogelsreinforcedbyinorganicnanoparticlesandcellulosenanofibers |