The polar surface and hydrophilicity of starch nanoparticles (SNPs) result in their poor dispersibility in nonpolar solvent and poor compatibility with hydrophobic polymers, which limited the application in hydrophobic system. To improve their hydrophobicity, SNPs prepared through self-assembly of short chain amylose debranched from cooked taro starch, were modified by octenyl succinic anhydride (OSA). Size via dynamic light scattering of OSA-SNPs increased compared with SNPs. Fourier transform infrared spectroscopy data indicated the OSA-SNPs had a new absorption peak at 1727 cm-1, which was the characteristic peak of carbonyl, indicating the formation of the ester bond. The dispersibility of the modified SNPs in the mixture of water with nonpolar solvent increased with increasing of degree of substitution (DS). OSA-SNPs appear to be a potential agent to stabilize the oil-water systems.
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机译:淀粉纳米粒子(SNP)的极性表面和亲水性导致它们在非极性溶剂中的分散性差,与疏水性聚合物的相容性差,这限制了其在疏水性系统中的应用。为了提高其疏水性,通过自组装从煮熟的芋头淀粉上脱支的短链直链淀粉的自组装制备的SNPs被辛烯基琥珀酸酐(OSA)改性。与SNP相比,通过OSA-SNP的动态光散射增加了尺寸。傅里叶变换红外光谱数据表明,OSA-SNPs在1727 cm -1 sup>处有一个新的吸收峰,这是羰基的特征峰,表明形成了酯键。改性SNP在水与非极性溶剂的混合物中的分散性随取代度(DS)的增加而增加。 OSA-SNP似乎是稳定油水系统的潜在剂。
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