Carboxymethyl chitosan oligosaccharide quaternary ammonium salt/rectorite nanometer composite material and preparation method and application thereof
A technology of carboxymethyl chitosan oligosaccharide and nano-composite material, which is applied in the field of daily cosmetics and cosmetic additives, can solve the problems of high price of hyaluronic acid, zero physiological activity, and promote carcinogenesis, and achieves good UV resistance and anti-cancer properties. Oxidative, good moisturizing effect
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[0022] Example 1
[0023] In the carboxymethyl chitooligosaccharide quaternary ammonium salt / retorite nanocomposite material of this embodiment, the carboxymethyl chitooligosaccharide quaternary ammonium salt accounts for 33.33%, and the rectorite accounts for 66.67%.
[0024] The weight average molecular weight of the above carboxymethyl chitosan quaternary ammonium salt is 2.0×10 4 , Carboxymethyl substitution degree is 95%, and quaternary ammonium group substitution degree is 20%.
[0025] The preparation method of the exfoliated carboxymethyl chitooligosaccharide quaternary ammonium salt / retorite nanocomposite is as follows:
[0026] step 1.
[0027] Disperse rectorite in deionized water to form a suspension with a concentration of 15 mg / mL, and swell at room temperature for 36 hours to obtain a rectorite suspension;
[0028] Dissolve the carboxymethyl chitooligosaccharide quaternary ammonium salt in deionized water to prepare a carboxymethyl chitooligosaccharide quaternary ammonium...
Example Embodiment
[0031] Example 2
[0032] In the carboxymethyl chitooligosaccharide quaternary ammonium salt / retorite nanocomposite material of this embodiment, the carboxymethyl chitooligosaccharide quaternary ammonium salt accounts for 50%, and the rectorite accounts for 50%.
[0033] The weight average molecular weight of the above carboxymethyl chitosan quaternary ammonium salt is 1.3×10 4 , Carboxymethyl substitution degree is 80%, quaternary ammonium group substitution degree is 35%.
[0034] The preparation method of the exfoliated carboxymethyl chitooligosaccharide quaternary ammonium salt / retorite nanocomposite is as follows:
[0035] step 1.
[0036] Disperse rectorite in deionized water to form a suspension with a concentration of 10 mg / mL, and swell at room temperature for 30 hours to obtain a rectorite suspension;
[0037] Dissolve the carboxymethyl chitooligosaccharide quaternary ammonium salt in deionized water to prepare a carboxymethyl chitooligosaccharide quaternary ammonium salt solu...
Example Embodiment
[0040] Example 3
[0041] In the carboxymethyl chitooligosaccharide quaternary ammonium salt / retorite nanocomposite material of this embodiment, the carboxymethyl chitooligosaccharide quaternary ammonium salt accounts for 66.67%, and the rectorite accounts for 33.33%.
[0042] The weight average molecular weight of the above carboxymethyl chitosan quaternary ammonium salt is 8.0×10 3 , Carboxymethyl substitution degree is 50%, quaternary ammonium group substitution degree is 55%.
[0043] The preparation method of the exfoliated carboxymethyl chitooligosaccharide quaternary ammonium salt / retorite nanocomposite is as follows:
[0044] step 1.
[0045] Disperse rectorite in deionized water to form a suspension with a concentration of 10 mg / mL, and swell at room temperature for 24 hours to obtain a rectorite suspension;
[0046] Dissolve carboxymethyl chitooligosaccharide quaternary ammonium salt in deionized water to prepare a carboxymethyl chitooligosaccharide quaternary ammonium salt so...
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