Method for preparing high-strength transparent chitin nanofiber gelatin composite membrane by mild method

Abstract

The invention provides a method for preparing a high-strength transparent chitin nanofiber gelatin composite membrane by a mild method, solves the technical challenges of chemical and mechanical treatment processes in the process of separating chitin fibers from chitin biological exoskeletons, and reduces the possibility of damage to the chitin fiber structure and performance reduction of the chitin fiber structure. The chitin nanofiber prepared by the mild method has a high specific surface area and a high length-diameter ratio. The chitin fiber can be better preserved by a mild treatment extraction mode, and the positive influence is generated on the performance of the mechanical film. Besides, different from a mixed casting method, the method has the advantages that the nano network structure of part of deacetylated chitin nanofibers is reserved in the gelatin matrix, and meanwhile, the higher transparency is still kept in a dry state. Good compatibility is shown through hydrogen bonds, and the mechanical property of the material is improved. The partially deacetylated chitin nanofiber gelatin nano composite material based on biocompatibility and biodegradable raw materials haspotential application prospects in biomedicine and food packaging industries.

Description

technical field [0001] The invention relates to the field of natural polymer materials, in particular to a mild method for preparing a high-strength transparent chitin nanofiber gelatin composite film. Background technique [0002] Chitin is mainly found in crustacean shells, such as crab shells, shrimp shells, shrimp mushroom shells, and horseshoe crab shells; mollusc bones, such as sea slugs, etc.; insect pupae and wings, such as pupal shells, maggot skins, cicada sloughs; and some microorganisms in the cell wall. And these animal casings etc. are generally waste, so the cost is low. And because these wastes pile up in large quantities will pollute the environment, using them to extract chitin is beneficial to the environment. Many scientists have proved that chitin itself and its degradation products are non-toxic to organisms, and the content of chitin in nature is huge, so it can be widely used as an environmentally friendly material. [0003] In recent years, the fo...

AI Technical Summary

Problems solved by technology

[0005] Broad range control of nanocomposites is severely limited during mixing, leading to aggregation in the polymer matrix leading to loss of mechanical properties

However, its application in various fields is limited due to poor mechanical properties