Fixation of silver ions onto silk sericin for silk weighting

In order to keep the silk weight and increase antibacterial capacity of silk fibers,the silk fabric was treated with silver nitrate solution,and the silver ions were fixed onto the silk fibers by coordinate bonds,while the sericin dissolution decreased simultaneously.This paper discussed the usage of silver nitrate,nitric acid and acetic acid,ammonia nitrate and the influence of fixation bath ratio,fixation time,preimpregnation time,etc.on sericin dissolution.As shown by the experimental results,the fixation of silver ions onto silk fiber surface can decrease the silk dissolution and increase the silk fiber weight indirectly.In terms of fixation solution,nitric acid is better than acetic acid,and addition of ammonia nitrate can enhance the fixation rate and decrease the sericin dissolution significantly.Furthermore,the preimpregnation and fixing time should not be too long,and for fixation,short liquor ratio is appropriate.