Carboxymethylated modification technology of Poria cocos powder.

Objective To definite the technological parameter of carboxymethylation modified product of Poria cocos,improve the water-soluble ability of Poria cocos and to expand the processing applications of P.cocos in Chinese medicine industry.Methods Taking the P.cocos powder as raw materials,The single-factor experiment of carboxymethylated modification was carried out to gain the greatest degree of substitution.Results Reaction medium,85% ethanol solution reaction temperature,50 ℃,6 h of etherification after 2 h of and molar ratio of alkali/acid controlled in 2.5∶1-3∶1,and the water-soluble ability was improved.Conclusion Using ethanol as reaction medium and method of two steps of alkaline addition to obtain carboxymethylation modified product of P.cocos,the processing characteristics of modified pro-duct could be greatly improved and be used in processing applications.