The bio-based film is widely used in chemical,food,medicine,and other fields,due to its strong plasticity and green environmental protection.As a new functional material film,the pH-responsive intelligent film can directly respond to the pH of food freshness,environment...MORE The bio-based film is widely used in chemical,food,medicine,and other fields,due to its strong plasticity and green environmental protection.As a new functional material film,the pH-responsive intelligent film can directly respond to the pH of food freshness,environmental changes,and other factors,and has the advantages ...