Journal
CARBOHYDRATE POLYMERS
Volume 255, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.117331
Keywords
Acidochromic cellulose; Reinforced multifunctional hydrogel; Self-healing; Color-tunable; Sol-gel conversion
Categories
Funding
- Fundamental Research Funds for the Central Universities [2232019A3-06, 2232019G-04, CUSF-DH-D-2019061]
- Graduate Student Innovation Fund of Donghua University [CUSF-DH-D-2019061]
- Program of Introducing Talents of Discipline to Universities [105-07-005735]
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The study integrated acidochromic regenerated cellulose into polyvinyl alcohol/borax matrix to prepare a smart hydrogel with self-healing, color-tunable, and sol-gel conversion properties. The mechanical properties of the hydrogel were significantly improved after incorporating ARC, showing excellent self-healing and color tuning abilities.
Recently, integration of self-healing, color-tunable, sol-gel converted properties into hydrogel has attracted interest for preparing a reinforced multifunctional hydrogel. Herein, acidochromic regenerated cellulose (ARC) was incorporated into the polyvinyl alcohol/borax (PB) matrix for constructing a tough, self-healing, multicolor and sol-gel converted smart hydrogel (PB/ARC). The mechanical properties of PB/ARC hydrogel were improved after introducing ARC, which could bear a weight of 200 g and had high maximum tensile strength (6.8 times) and compressive strength (2.3 times). PB/ARC hydrogel automatically fused within 15 s after being cut and quickly recovered to the original state after being subjected to high shear strain, showing excellent self-healing ability. The color of hydrogel could be tuned between yellow and purple by altering pH values (5-12). In addition, PB/ARC hydrogel exhibited reversible sol-gel conversion in response to the change of acidity and alkalinity. This study offers a new and facile strategy for developing multifunctional smart hydrogel.
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