Carboxymethyl curdlan aqueous solution or hydrogel, preparation method and application thereof
A technology of carboxymethyl and hydrogel, which is applied in the fields of pharmaceutical formulations, cosmetic preparations, toiletry preparations, etc., and can solve the problem of thickening and gel properties of carboxymethyl curdlan without a low degree of substitution, etc. problem, to achieve excellent thickening and gelling effect, the method is simple and convenient
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Embodiment 1
[0022] The preparation method of the carboxymethyl curdlan physical hydrogel of embodiment 1 is as follows:
[0023] (1) Accurately weigh 0.10 g of carboxymethyl curdlan gum with DS=0.1 and n=3000, dissolve it in ultrapure water, and prepare an aqueous solution of carboxymethyl curdlan gum with a mass concentration of 1%;
[0024] (2) The temperature of the carboxymethyl curdlan aqueous solution prepared in the step (1) is controlled at room temperature, and the carboxymethyl curdlan hydrogel is formed by standing naturally.
[0025] Utilize TA AR G2 type rotational rheometer to test the elastic modulus G ', viscous modulus G " and complex viscosity η * of the carboxymethyl curdlan glue hydrogel that embodiment 1 obtains to change with frequency ω, and the results are shown respectively At figure 1 and figure 2 . from figure 1 It can be seen that the system G'>G of Example 1 "and hardly changes with frequency; from figure 2 It can be seen that its complex viscosity decr...
Embodiment 2
[0027] The preparation method of the carboxymethyl curdlan physical hydrogel of Example 2 is basically the same as that of Example 1, except that the mass concentration of the carboxymethyl curdlan aqueous solution configured in step (1) is 0.5%.
[0028] from figure 1 It can be seen that the system G'>G of Example 2 increases slightly with increasing frequency; from figure 2 It can be seen that its complex viscosity decreases linearly with frequency, showing high thickening and high shear thinning characteristics.
Embodiment 3
[0030] The preparation method of the carboxymethyl curdlan physical hydrogel of Example 3 is basically the same as that of Example 1, except that the mass concentration of the carboxymethyl curdlan aqueous solution configured in step (1) is 0.4%.
[0031] from figure 1 It can be seen that the system of embodiment 3 is G'G at high frequency and all show frequency dependence; from figure 2 It can be seen that its complex viscosity decreases linearly with frequency, showing high thickening and shear thinning properties.
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