The preparation conditions of nano silver extracted from walnut green peelis were studied,and the preservation performance of nano silver composite coating on cherry was determined.The aqueous extract of walnut shell was employed as a reducing and stabi-lizing agent in the synthesis of silver nanoparticles.The process conditions for the production of silver nanoparticles were refined through a series of single-variable experiments.The resulting nanoparticles were subsequently analyzed using UV-visible spec-troscopy.Cherry was chosen as the preservative material,and the preservative efficacy of the nano-silver composite film was evaluated by assessing the weight loss rate,pH,and titratable acidity of the cherry.The results showed that nano silver composite coating could prolong the storage life of cherry.The preparation conditions of nano silver from walnut green peel extract were as follows:the concen-tration of silver nitrate was 0.012 mol·L-1,the concentration of walnut green peel extract was 0.006 g·mL-1,and the reaction time was 3 h.This study can provide a theoretical basis for the high-value utilization of walnut green peel and the green preparation of nano silver.
关键词
核桃青皮/银纳米粒子/绿色制备工艺/保鲜性能
Key words
walnut green peel/silver nanoparticles/green preparation process/preservation performance
维普
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