Department of Biotechnology and Food Technology, Durban University of Technology, PO BOX 1344, Durban 4000, South Africa.
Department of Biotechnology and Food Technology, Durban University of Technology, PO BOX 1344, Durban 4000, South Africa.
Carbohydr Polym. 2017 Jun 1;165:142-148. doi: 10.1016/j.carbpol.2017.02.041. Epub 2017 Feb 16.
The influence of amadumbe starch nanocrystals (SNCs) at varying concentrations (2.5, 5 and 10%) on the physicochemical properties of biocomposite films prepared using two starch matrices, amadumbe and potato starches were investigated. Amadumbe SNCs exhibited square-like platelets morphology, typical of SNC derived from A-type starches. In general, the inclusion of SNCs significantly decreased water vapour permeability (WVP) of composite films whilst thermal stability and opacity were increased. Amadumbe starch films showed substantially high tensile strength (TS) compared to potato starch in the presence of SNCs. At 2.5% SNCs, TS of composite amadumbe film (8MPa) was about four times that of composite potato films. However, SNCs≥5% generally decreased TS of both potato and amadumbe films. Amadumbe SNCs can potentially be used as fillers to improve the properties of biodegradable starch films. Amadumbe starch has better film forming properties compared to potato starch.
研究了不同浓度（2.5%、5%和 10%）的amadumbe 淀粉纳米晶（SNC）对使用两种淀粉基质——amadumbe 淀粉和马铃薯淀粉制备的生物复合膜的物理化学性质的影响。amadumbe SNC 呈现出典型的 A 型淀粉衍生的 SNC 的方形片状形态。一般来说，SNC 的加入显著降低了复合膜的水蒸气透过率（WVP），而热稳定性和不透明度则增加。与马铃薯淀粉相比，在添加 SNC 的情况下，amadumbe 淀粉膜具有更高的拉伸强度（TS）。在 2.5%的 SNC 下，复合 amadumbe 膜的 TS（8MPa）约为复合马铃薯膜的四倍。然而，SNC≥5%通常会降低马铃薯和 amadumbe 薄膜的 TS。amadumbe SNC 可以作为填充剂，以改善可生物降解淀粉膜的性能。与马铃薯淀粉相比，amadumbe 淀粉具有更好的成膜性能。
