A multi-component hybrid inorganic single-shell multi-temperature zone phase-change microcapsule and its preparation method

Abstract

The invention discloses a multi-component hybrid inorganic single-shell multi-temperature zone phase-change microcapsule and a preparation method thereof. The phase-change microcapsule comprises an organic phase-change core material and an inorganic single-shell layer coated outside the organic phase-change core material Inorganic single-shell layer is a multivariate hybrid inorganic single-shell layer formed by in-situ growth of a variety of inorganic shell precursors competing with each other at the microfluidic emulsification interface. The organic phase change core material is a mixture of various organic phase change materials. Uniform multi-temperature zone multi-component organic phase change material. In the phase change microcapsules, the multi-component hybrid inorganic single shell has better strength and compactness than the traditional single-component shell or hybrid multiple shells, and is not easy to break, which plays a good role in protecting the core material. effect. The phase-change microcapsules can be reasonably matched with internal organic phase-change materials according to the actual situation, so that the phase-change microcapsules have the characteristics of phase change in multiple temperature zones, so that they can be applied in different scenarios.

Description

technical field [0001] The invention belongs to the technical field of phase change materials, and in particular relates to a multi-component hybrid inorganic single-shell multi-temperature zone phase-change microcapsule and a preparation method thereof. Background technique [0002] Phase change material, that is, a substance that can provide latent heat by changing the state of matter under the condition of constant temperature, is to store or release thermal energy by utilizing the property of absorbing or releasing a large amount of heat when a substance undergoes a phase change, thereby making the ambient temperature reach a predetermined temperature. , so that the device can work better or some items can be stored well. Solid-liquid phase change materials are the most widely used phase change materials due to their large latent heat of phase transition. However, the phase change material is prone to problems such as leakage when it is in a liquid state, and the direct...

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Problems solved by technology

In terms of shell, the traditional single-component shell phase change microcapsules have poor strength and compactness, which may easily cause leakage of phase change materials, pollute the environment, and have no functional properties

For hybrid multi-shell phase change microcapsules, although the shell strength and compactness have been improved, the multiple shells are likely to cause thick shells, resulting in a small proportion of phase change materials and poor performance; the general preparation process is cumbersome and requires many Internal reaction, forming shells in turn; at the same time, the functional properties of the capsule are relatively lacking

In terms of phase change materials, the traditional phase change microcapsules generally have a relatively single internal phase change material component, so its application scenarios are also very limited, and it is no longer fully applicable to various current complex application scenarios.

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