Fabrication of hollow melamine-formaldehyde microcapsules from microbubble templates
Fabrication of hollow melamine-formaldehyde microcapsules from microbubble templates
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DOI：
10.1021/jp072131t
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发表时间：
2007-08-02
影响因子：
3.3
通讯作者：
Takemura, Fumio
中科院分区：
文献类型：
--
作者：
Daiguji, Hirofumi;Makuta, Toshinori;Takemura, Fumio
提出了一种利用微泡模板制备中空三聚氰胺-甲醛微胶囊的方法。该方法基于微泡的直接包封，因此不需要液体或固体核心分解过程。本研究确定了控制中空微胶囊的表面形态、壳层厚度和直径分布的条件。结果表明，反应时间、甘氨酸浓度（连续相pH值）和预聚物浓度对中空微胶囊的表面形貌有影响。通过调节吸附在微泡表面并与预聚物反应的苯胺浓度，可以控制囊壳厚度。微胶囊的直径取决于气体的溶解速率，由空气微泡模板制备的中空微胶囊的直径范围为5 - 200 μ m。
A fabrication method for hollow melamine-formaldehyde microcapsules from microbubble templates is presented. This method is based on the direct encapsulation of microbubbles, and thus does not require a liquid- or solid-core decomposition process. This study determined the conditions for controlling the surface morphology, shell thickness, and diameter distribution of hollow microcapsules. Results showed that the surface morphology of these hollow microcapsules depended on the reaction time, glycine concentration (pH of aqueous continuous phase) and pre-polymer concentration. The capsule shell thickness could be controlled by adjusting the concentration of aniline that had adsorbed on the microbubble surface and reacted with pre-polymer. The capsule diameter depended on the dissolution rate of gases, and the diameter of the hollow microcapsules fabricated from air microbubble templates ranged from 5 to 200 mu m.