Method for manufacturing hydroxyethyl glycosaminoglycan film-forming agent for fresh-keeping of winter jujube

Method for manufacturing hydroxyethyl glycosaminoglycan film-forming agent for fresh-keeping of winter jujube

  • CN 100,502,671 C
  • Filed: 05/01/2004
  • Issued: 06/24/2009
  • Est. Priority Date: 09/15/2003
  • Status: Active Grant
First Claim
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1. , a kind of manufacture method of hydroxyethylamino polysaccharide fresh-keeping of dong jujube film forming agent is characterized in that comprising:

  • (one) is raw material with the ectoskeleton of shellfish or insect, carries out washing pH value neutrality with clear water after soda acid handles, and drying obtains chitosan;

    (2) add concentrated base in the chitosan and carry out deacetylation, the alkali consumption is 10-100 a times of chitosan, the concentration of alkali is 25%-60%, temperature is-5~

    25 ℃

    , or 80~

    120 ℃

    , the processing time is 2~

    8 hours, the washing drying obtains taking off the acetyl chitosan and also is glycosaminoglycan, the deacetylation of glycosaminoglycan can be 45%~

    55%, also can be 75%~

    100%;

    (3) glycosaminoglycan is reacted with chlorethanol in solvent, the ethoxy chitin derivative that obtains, the carboxylation degree of the product that reaction obtains is in 0.5~

    1.2 scope;

    (4) the ethoxy chitin derivative is dissolved in water, and the concentration of solution is 200ppm~

    2%;

    (5) in the ethoxy chitin derivative solution of step (four), add emulsifying agent, this emulsifying agent comprises the mixture of one or more emulsifying agents of Toween10~

    80, span20~

    60, sucrose fatty ester, monoglyceride, odium stearate, quaternary ammonium salt, and the concentration of emulsifying agent is 0.001-0.5%;

    (6) the pH value of adjusting in the ethoxy chitin derivative solution with acid or alkali is 5~

    8, and the acid of use is inorganic acid or organic acid, and alkali is NaOH or potassium hydroxide.

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