混凝土中微波型主动控释胶囊的制备及释放行为

doi:10.11896/cldb.20100262

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Abstract Akind of concrete-based active controlled release capsule was designed and prepared. The capsule can release the core material actively under the stimulation of microwave signal. Capsule and its release behavior were characterized by scanning electron microscopy, X-ray computed tomography and potentiometric titration. The release mechanism and influencing factors of release ratio were discussed by fitting the release kinetics model and analyzing the range and variance. The results show that the average loading capacity of the capsule is 34.71%; the core material can be released slowly and continuously after the microwave is applied; the release mechanism is mainly Fick diffusion mechanism with core materials distributed in the pores of porous carrier; the influence degree of each influencing factor on the release ratio is microwave power > microwave treatment time>paraffin thickness>Fe₃O₄ content; it is preliminarily proved that the capsule has the property of microwave active control release in mortar. The application of the capsule is expected to solve the negative effects of direct admixtures and the difficulty in improving the properties of concrete after hardening.

Key words： capsule microwave active control release release kinetics model

Published: 25 February 2022 Online: 2022-02-28

CLC number:

TU528

Fund:National Natural Science Foundation of China (51890904, 52078126) and Open Fund of State Key Laboratory of High Performance Civil Engineering Materials (2018CEM001).

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	Articles by authors
	ZHANG Qi
	FENG Pan
	WANG Haochuan
	SHAO Lijing
	YE Shaoxiong
	RAN Qianping

Cite this article:

ZHANG Qi,FENG Pan,WANG Haochuan, et al. Preparation and Release Behavior of Microwave Active Controlled Release Capsule in Concrete[J]. Materials Reports, 2022, 36(4): 20100262-7.

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http://www.mater-rep.com/EN/10.11896/cldb.20100262 OR http://www.mater-rep.com/EN/Y2022/V36/I4/20100262

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