In this work,regenerated bacterial cellulose( RBC) membrane was prepared by LiCl /DMAc,and influence of the concentration of bacterial cellulose solution on crystallinity,equilibrium water content,light transmittance and the diffusion of nutrients( sodium chloride,glucose sugar,tryptophan) of RBC membrane were studied. The experimental results showed that,with the concentration of bacterial cellulose solution increasing,the degree of crystallinity of regenerated membrane slightly decreased; equilibrium wate...