Details

Autor(en) / Beteiligte

• Wang, Haochuan
• Feng, Pan
• Lu, Jinyuan
• Wang, Wei
• Shao, Lijing
• Zhang, Qi
• Hong, Jinxiang

Titel

Design of millimeter-scale microwave-induced capsules and their non-instantaneous release

Ist Teil von

• Materials & design, 2023-02, Vol.226, p.111663, Article 111663

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Microwave-induced capsules with a high loading capacity of 57% were fabricated.•Capsules were designed to release in both water and water-free environments.•Non-instantaneous release of capsules upon microwave stimulation was reported.•The release profile can be well described by combining the zero-order model and CDF.•Shell thickness was the key to releasing kinetics proven bysimulationandexperiments. In recent years, many studies have been carried out on the release system induced by the microwave signal, featured with great thermal efficiency and high penetration. However, studies on microwave responsive system on millimeter length scale are limited, which is of great importance due to its high loading capacity and widespread application. In this study, novel microwave-induced capsules on millimeter length scale with responsiveness in water-free environment, consisting of paraffin shell and the supportive skeleton fibers were designed and prepared. The detailed microwave-induced releasing behaviors, together with the morphology, loading capacity of capsules were systematically investigated. Non-instantaneous releasing behavior consisted of microwave heating, shell melting and core releasing was observed, and was supported by numerical simulations. The key role of paraffin shell with different thickness was confirmed in the kinetics of releasing. The release profile can be well described by a two-segment model, which includes zero-order model and cumulative distribution functions, corresponding to diffusion controlled and shell-melting controlled releasing processes, respectively.