Method for drying biological cellulose hydrogel

Abstract

The invention relates to a method for drying biological cellulose hydrogel. The method comprises the following steps of: soaking part of dehydrated biological cellulose hydrogel in a surfactant-containing solution, and then drying. The surfactant is one or more of glycerin fatty acid ester, sucrose fatty acid ester, soyabean lecithin, acetin, tartaric acid glyceride, diacetyl tartaric acid glyceride, citrate, polyglycerol fatty acid ester, stearoyl citrate, stearyl tartrate, sodium stearyl lactate, calcium stearyl lactate, sodium stearyl fumarate and sorbitan fatty acid ester. By the method for drying the biological cellulose hydrogel, the damage to the spatial net structure of biological cellulose in the drying process can be reduced, and the cracking in the drying, packaging and conveying processes is reduced, and the thermal insulation property of a biological cellulose dried product can be improved.

Description

technical field [0001] The invention relates to a preparation method of a biological cellulose product, in particular to a drying method of a biological cellulose hydrogel. Background technique [0002] Biocellulose, also known as bacterial cellulose (BC), is a cellulose product made by fermentation of microorganisms of the genus Acetobacter, such as Acetobacter xylinum. At present, waste materials, such as coconut water and pineapple peel juice, are used as raw materials, so the cost is low. The obtained product contains more than 95% water, so it is also called biocellulose hydrogel. At present, domestic bacterial cellulose products are mainly added to food as dietary fiber to provide health care functions to the human body. The preparation method of biocellulose hydrogel is known in the art, as disclosed in CN101671708, CN1840677A, and CN101319242A. In recent years, the research on the new application of biocellulose hydrogel has been in-depth, which often involves the...

AI Technical Summary

Problems solved by technology

[0003] However, at present, it is difficult to produce biocellulose dry products with a large area. This is because the water in the biocellulose hydrogel has a high surface tension, so it will cause biocellulose space as it is lost during the drying process. The collapse of the network structure greatly affects its mechanical properties and greatly improves the brittleness of the dried biocellulose product. Due to the shrinkage of the material during the drying process, a large range of product fragmentation will occur during the drying process. In addition, even if the dry product of biological cellulose without fragmentation can be obtained, due to its high brittleness, a large amount of loss will be generated in the packaging and transportation links, which will greatly increase the cost of production