Preparation method of carboxymethyl chitin

A technology of carboxymethyl chitin and chitin, applied in the field of material science, can solve the problems of large environmental pollution and serious molecular weight degradation of products, and achieve the effects of environmental friendliness, high degree of substitution and high yield
CN103288980AInactive Publication Date: 2013-09-11HUASHAN AQUATIC FOOD & PROD CO LTD
2 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUASHAN AQUATIC FOOD & PROD CO LTD
Publication Date
2013-09-11
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a preparation method of carboxymethyl chitin. The preparation method comprises the following steps of: (1) dissolving chitin into mixed solution of NaOH and CO(NH2)2 to obtain solution of chitin; (2) adding sodium chloroacetate into the chitin solution, stirring at the temperature of 0-20 DEG C for 72-120h, and adjusting the pH value of the solution of chitin to be neutral by using diluted hydrochloric acid, wherein the molar ratio of a chitin monomer to the sodium chloroacetate is 1:(4-20); and (3) dialyzing the neutral chitin solution until sodium chloride in the neutral chitin solution is completely removed, and drying and dialyzing to obtain a liquid, i.e., the spongy carboxymethyl chitin. The method disclosed by the invention is mild in reaction, little in damage to chitin molecules and high in product substitution degree and can be applied to fields such as cosmetics, food packaging films, spinning, agriculture, medicines and environment protection; the obtained carboxymethyl chitin has ion sensibility.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of material science, and in particular relates to a preparation method of carboxymethyl chitin. Background technique

[0002] Chitin, also known as chitin, chitin, chitin, polyacetylglucosamine, is widely found in the shells of crustaceans, shrimps, crabs, insects, fungal cell walls and plant cell walls. One of the most abundant organic matter. However, there are strong hydrogen bonds in and between chitin molecules, making it insoluble in general solvents, and only soluble in concentrated acids, concentrated alkalis and some organic solvents, which greatly limits the wide application of chitin as a renewable resource. , the utilization of this natural resource has been mostly limited to the research and development of its deacetylation product - chitosan, while the direct utilization of chitin is relatively small.

[0003] Carboxymethyl chitin is a water-soluble anionic polymer with carboxyl groups in its molecular...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More