Additive microcapsule based on microwave controlled release and preparation method thereof

Abstract

The invention relates to the field of additives for building materials, in particular to an additive microcapsule based on microwave controlled release and a preparation method thereof. The microcapsule is composed of a capsule wall, a capsule core and a packaging material, wherein the capsule wall is made of polyvinylidene fluoride fiber; the capsule core is an additive which needs to be controlled to release; the packaging material is a heat-sensitive phase change material; according to the method, the PDVF material is high in strength, resistant to acid and alkali and suitable for being used in building materials; most importantly, the PDVF material can realize microwave response, so that active controlled release of the admixture in concrete can be realized, and the problem of performance loss caused by advanced release of the admixture is effectively solved.

Description

technical field

[0001] The invention relates to the field of admixtures for building materials, in particular to an admixture microcapsule based on microwave controlled release and its preparation method and application. Background technique

[0002] Concrete is one of the most widely used building materials in modern engineering construction, and admixtures play an increasingly important role in concrete. Appropriate addition of different admixtures can bring different performance improvements to concrete: water reducing agent can adjust the work performance of fresh concrete to benefit the later strength; early strength agent can promote hydration and improve the early strength of concrete; retarder or accelerator The setting time of cement can be adjusted; the air-entraining agent or rust inhibitor is beneficial to the durability of concrete, etc. From the beginning of mixing the raw materials to the hardening and maturity of concrete, different admixtures need to work i...

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