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

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

CN
  • CN 100,502,670 C
  • Filed: 05/01/2004
  • Issued: 06/24/2009
  • Est. Priority Date: 09/15/2003
  • Status: Active Grant
First Claim
Patent Images

1. , a kind of manufacture method of carboxymethylamino polyose 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 weight, the concentration of alkali is 25%-60%, temperature is-5~

    25 ℃

    , or 80~

    120 ℃

    , processing time is 2~

    8 hours, and the washing drying obtains glycosaminoglycan, and the deacetylation of glycosaminoglycan is 45%~

    55% or 75%~

    100%;

    (3) with glycosaminoglycan in solvent with chloroacetate reaction, obtain carboxymethylamino polyose, the carboxylation degree of the product that obtains of reaction is in 0.7~

    1.4 scope;

    (4) carboxymethylamino polyose after the carboxylation is dissolved in water or is dissolved in weakly alkaline solution, and the concentration of solution is 200ppm~

    2%;

    (5) in the carboxymethylamino polyose 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 or quaternary ammonium salt, and the concentration of emulsifying agent is 0.001-0.5%;

    (6) the pH value of adjusting in the carboxymethylamino polyose 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;

    (7) the little molecular regulation osmotic pressure of organic matter of adding weight 0~

    1% in carboxymethylamino polyose solution, the little molecule of organic matter comprises sorbierite, sweet mellow wine, glucose, mannose, maltose, glycine or glycerine.

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