School of Science, RMIT University, Melbourne, VIC 3000, Australia.
CSIRO Manufacturing, Clayton South, VIC 3169, Australia,.
Carbohydr Polym. 2017 Oct 1;173:170-177. doi: 10.1016/j.carbpol.2017.05.009. Epub 2017 May 10.
Thermoplastic starch forms packaging films that have low gas permeability, but they are more permeable to water vapour and they are attacked by water. Our approach was to create surface and internal localised hydrophobicity using added reactive nano-materials to form nano-silica hybrids with emphasis on enhancing surface water resistance. Functionalization was via epoxy-POS, that were further linked to hydrophobic erucamide or an amphiphilic poly(oxyethylene-co-oxypropylene) mono-amine. High amylose thermoplastic starch was combined with mono-functionalised hepta-isobutyl polyhedral oligomeric silsesquioxane (POS). POS modified thermoplastic starch increased water resistance of TPS film. Wettability kinetics was a function of two distinct mechanisms each with independent linear behaviour. Surface water resistance increased and is proposed to be due to preferential location of the POS derivatives at the surface with associated increase of hydrophobicity due a surface change.
热塑性淀粉形成具有低气体透过性的包装薄膜，但它们对水蒸气的透过性更强，并且会受到水的侵蚀。我们的方法是使用添加的反应性纳米材料在表面和内部形成局部疏水区，重点是提高表面耐水性。功能化是通过环氧-POS 进行的，进一步与疏水性芥酰胺或两亲性聚（氧化乙烯-co-氧化丙烯）单胺相连。高直链淀粉热塑性淀粉与单官能化的七异丁基 POSS 结合。POS 改性热塑性淀粉提高了 TPS 薄膜的耐水性。润湿性动力学是两个不同机制的函数，每个机制都具有独立的线性行为。表面耐水性增加，据推测是由于 POS 衍生物优先位于表面，由于表面变化导致疏水性增加。
