The high degree of freedom of the design of the composite insulation material makes it more suitable for the development of functional composite materials, especially in the process of function-a multi-functional-aware-intelligent composite material, that is, from low-level to high-level forms. These developments are mainly manifested in the following aspects.
Functional composite materials
Many functional varieties of the above-mentioned functional composites have been applied, but they are still far from the perspective of development. Functional composites cover a wide range of applications. In terms of electrical functions, there are conductive, superconducting, insulating, absorbing (electromagnetic) waves, semi-conducting, shielding or transmitting electromagnetic waves, piezoelectricity, electrostriction, etc.; in terms of magnetic functions, there are permanent magnetic, soft magnetic, magnetic shielding, and magnetic Relevant to the expansion and contraction; in the light function, there are light transmission, selective filter, photochromism, photoluminescence, anti-laser, x-ray shielding and X-ray transmission; acoustic function, sonar, anti-sonar in acoustic function Etc.; in terms of thermal function, there are thermal conductivity, thermal insulation and heat resistance, ablation resistance, flame retardant, heat radiation, etc.; in terms of mechanical functions, there are damping vibration, self lubrication, wear resistance, sealing, bulletproof armor, etc.; in the chemical function There are selective adsorption and separation, anti-corrosion, etc. The others are no longer listed. Among the above-mentioned various functions, the composite material can play a role in the logistics packaging as a main material or an auxiliary material.
Multi-functional composite materials
Composites have a multi-component nature and therefore will inevitably develop into multi-functional composites. The first is the formation of composite materials with both function and structure, which has been confirmed in practical applications. For example, the U.S. military aircraft has a self-preserving stealth function, that is, a functional composite material that absorbs electromagnetic waves is applied to the aircraft’s skin to avoid radar tracking, and this composite material is a high-performance structural composite material. At present, a multi-functional composite material that absorbs electromagnetic waves and infrared rays and can be used as a structure is being developed. It can be said that developing in the direction of multi-functionality is an inevitable trend in exerting the advantages of composite materials. It also opens up broad prospects for the manufacture of special-purpose packaging.
Humans have always expected that materials have the ability to sense external effects and respond appropriately. At present, it has begun to combine sensory functional materials and materials with executive functions through a certain matrix and connect an external information processing system to convey the information given by the sensors to the executing materials so as to generate corresponding actions. Smart composites and their systems. It can sense the changes of the external environment and make active responses. Its role can be manifested in self-diagnosis, self-adaptive, and self-repairing capabilities. Only from the packaging aspect, smart composite materials will play an enormous role in the quality change of the packaged goods, damage and pollution in storage and transportation.
Smart composite materials
Smart composites are the highest form of functional materials. In fact, it is based on the development of self-decision making ability on the basis of smart composite materials, relying on the artificial intelligence system added in the external information processing system to analyze the information, giving decision-making, command and execution materials to make optimization choices. This puts higher requirements on the sensitivity, accuracy, and response speed of the sensing and performance parts of the material, and also presents a good blueprint for the future of packaging.