Abstract
In recent years, research has been focused on biodegradable materials to replace petroleum-based plastics for food packaging applications. For this purpose, biopolymers are considered the most promising materials for biodegradable nature and the long shelf life, such as resistance to chemical or enzymatic reaction. Starch is a renewable biopolymer, cheap and abundantly available. However, the intermolecular forces and hydrogen bonds in starch against it is processed as a thermoplastic material. To overcome this problem, different plasticizers are used for deformable thermoplastic material called thermoplastic starch (TPSs). A plasticizer to enhance the flexibility, stable process temperatures starch degradation. Plasticizers reduce the glass transition temperature (Tg). TPS is very promising in biobased materials are available for the production of biodegradable plastics. TPS has some limitations; mechanical condition and water-sensitive assets. Starch absorbs water under high relative humidity. This work will provide an outline of the research has been done on TPS for 15 years as biodegradable food packaging materials. Practical applications: The fundamental role of food packaging materials is to make it cost-effective requirements that meet the industry and the consumer wants, and provide protection from the 3 main layers by external influences: chemistry, biology and physics, for example, such as exposure to air, barrier to microorganisms, or from mechanical damage, respectively. The outside influences can damage the quality of the food and the expiry date. For this engine, starch has become the most preferred choice of the classes tested synthetic materials and natural. Retrogradation starch chains in the presence of water makes it impossible to be used as packaging material. To overcome this problem, the starch has been flexible with water and low molecular weight additives that can interact with its backbone by linking hydrogen to produce thermoplastic starch (TPS). The objective of this evaluation is summarized numerous studies involving the interaction of plasticizers and starch for the production of food packaging materials biodegradable TPS.
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