Journal
CARBOHYDRATE POLYMERS
Volume 278, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2021.118993
Keywords
Carboxymethyl chitosan; Sodium alginate; Hydrogel bead; pH -sensitive; Oral protein delivery
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Funding
- National First-class Discipline Pro-gram of Food Science and Technology [JUFSTR20180204]
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In this study, a novel synthesis strategy utilizing hydrogen bonds was used to prepare sodium alginate/carboxymethyl chitosan hydrogel beads. The beads demonstrated excellent pH sensitivity, reversibility, and protein loading capacity, making them a potential carrier for oral delivery of proteins.
In this work, a novel synthesis strategy of sodium alginate/carboxymethyl chitosan hydrogel beads promoted by hydrogen bond was described. The beads were prepared by dropping the blends of two polymers into the citric acid solution. Besides hydrogen bonding, electrostatic interactions were also involved in the formation of the hydrogel beads. The thermal stability experiments revealed that the more the content of carboxymethyl chitosan, the better the thermal stability of the beads. The beads exhibited excellent pH sensitivity, pH reversibility, and lactoferrin loading capacity. The swelling ratio of the bead and its protein releasing profile was pH-dependent, which could prevent premature protein release in the gastric environment. Also, the circular dichroism results demonstrated that lactoferrin could maintain its structure during the loading and releasing process. The obtained results revealed that the hydrogel beads prepared in this work could be used as a potential protein carrier for oral delivery.
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