Calcium Alginate Foams Prepared by a Microfluidic T-Junction System: Stability and Food Applications
Calcium Alginate Foams Prepared by a Microfluidic T-Junction System: Stability and Food Applications
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DOI：
10.1007/s11947-011-0650-3
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发表时间：
2012-10-01
影响因子：
5.6
通讯作者：
Edirisinghe, Mohan
中科院分区：
文献类型：
--
作者：
Ahmad, Bilal;Stride, Eleanor;Edirisinghe, Mohan
利用微流控T形接头装置对高粘度的海藻酸盐溶液进行鼓泡，通过一种新的方法制备了海藻酸盐泡沫塑料。研究了气泡大小与空气压力、溶液流量等发泡条件的关系，并系统考察了T型接头装置产生单分散微泡(平均直径约154微米)和产生多孔泡沫的能力。用光学显微镜和扫描电子显微镜对泡沫进行了表征。用这种技术成功地制备了不同长度(12-45 mm)的泡沫，平均密度接近235 kg/m(3)。显微镜下测得泡沫塑料的孔径范围为600 nm-200微米，平均孔径约为31微米。结果表明，泡沫塑料的孔隙率(>；90%)可随初始气泡大小而变化。因此，提出了一种用于食品和生物加工技术开发的稳定的高孔固体泡沫的可能生产方法，利用该方法可以制作不同尺寸的产品。
Highly porous alginate foams were prepared via a novel route in which highly viscous alginate solutions were bubbled using a microfluidic T-junction device. The relationship between bubble size and bubbling conditions such as air pressure and solution flow rate was studied, and the ability of the T-junction setup to generate monodisperse microbubbles (mean diameter, similar to 154 mu m) and produce porous foams was systematically investigated. The foams were characterised by optical and scanning electron microscopy. Foams of varying lengths (12-45 mm) were successfully prepared using this technique, with an average density of similar to 235 kg/m(3). The pore diameter within the foams was determined by microscopy to be in the range of 600 nm-200 mu m with a mean diameter of similar to 31 mu m. It was concluded that porosity in the foam (> 90%) can be varied depending on the initial bubble size. Thus, a possible production method of stable highly porous solid foams for exploitation in food and bioprocess technologies is presented by which products can be made to different sizes.