Research progress of pH-responsive intelligent food packaging materials
To avoid food waste,the research of intelligent food packaging materials is urgent.Compared with other kinds of intelligent packaging materials,pH-responsive packaging is the most widely used intelligent material,and pH-responsive intelligent packaging materials are combined through pH indicators(pigments)and polymer carrier materials.Compared with synthetic pigments and synthetic polymer matrix,natural pigments have abundant advantages,such as color,ease of obtaining,non-toxic,safety,and high pH responsiveness.Natural biopolymer also has lots of advantages,such as biocompatibility,availability,biodegradability,stability,non-toxicity,and easy film formation.This article reviews the latest developments in natural pH-responsive intelligent packaging materials and further explores the challenges and opportunities of this intelligent packaging material.
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