Recovered chitin, chitosan from shrimp shell : Structure, characteristics and applications
Phat, Nguyen Doan Tan (2021)
2021
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-202103123232
https://urn.fi/URN:NBN:fi:amk-202103123232
Tiivistelmä
Environmental pollution is the most noticeable problem over the world, recycling is recommended. Modern seafood production produces a large volume of waste. Chitin and chitosan which are produced through the food process are high-value natural compounds. Thus, chitin and chitosan have attracted many researchers who reported many experiments about extracting chitin and chitosan from seafood waste.
The chitin and chitosan’s definition, structure, allomorphs, and properties were written in this thesis. Relationship of physical properties and biological activities, which affect directly to chitin and chitosan properties, was introduced. Chitin and chitosan are the second common compounds in nature just after cellulose. Crustaceans, microorganisms, and insects are the main sources of chitin and chitosan, in which three different types of chitin were found in various species.
The lab-scale and commercial-scale extracting chitin and chitosan were introduced, turning crustacean waste to chitin and chitosan were performed through deproteinization, demineralization, and deacetylation. Decolorization and preserving process of chitin and chitosan were optional process to produce the high quality chitinous product. Chemical and biological extraction was compared as well as the conditions of each step. Although chemical extraction had many drawbacks, but it was the most economical method to produce chitin products. Chitin and chitosan have great potential biological activities such as antioxidant, antihypertensive, anticoagulant, anti-inflammatory, antitumor, antidiabetic effects, antimicrobial, and hypocholesterolemic. Thus, chitin and chitosan were applied in medical, agriculture, and industrial domains. Some applications were discussed as drug delivery, wound healing, engineering tissue, water treatment or food preservation. In conclusion, challenges were written although chitin and chitosan are promising compounds in the future.
The chitin and chitosan’s definition, structure, allomorphs, and properties were written in this thesis. Relationship of physical properties and biological activities, which affect directly to chitin and chitosan properties, was introduced. Chitin and chitosan are the second common compounds in nature just after cellulose. Crustaceans, microorganisms, and insects are the main sources of chitin and chitosan, in which three different types of chitin were found in various species.
The lab-scale and commercial-scale extracting chitin and chitosan were introduced, turning crustacean waste to chitin and chitosan were performed through deproteinization, demineralization, and deacetylation. Decolorization and preserving process of chitin and chitosan were optional process to produce the high quality chitinous product. Chemical and biological extraction was compared as well as the conditions of each step. Although chemical extraction had many drawbacks, but it was the most economical method to produce chitin products. Chitin and chitosan have great potential biological activities such as antioxidant, antihypertensive, anticoagulant, anti-inflammatory, antitumor, antidiabetic effects, antimicrobial, and hypocholesterolemic. Thus, chitin and chitosan were applied in medical, agriculture, and industrial domains. Some applications were discussed as drug delivery, wound healing, engineering tissue, water treatment or food preservation. In conclusion, challenges were written although chitin and chitosan are promising compounds in the future.