To investigate the effect of oil additives on improving the water resistance of corn starch straws, corn oil (CO), soybean oil (SO), rapeseed oil (RO), peanut oil (PO), lard (LD) and coconut oil (CCO) were chosen and compared the structure and properties of starch straws with different oil additives. Corn starch straws (CS), and starch straws supplemented with CO, SO, RO, PO, LD and CCO were prepared by thermoplastic extrusion. The results showed that the incorporation of oils effectively enhanced the water resistance of starch straws such as water absorption, water solubility and water swelling performance. Meanwhile, the flexural strength of starch straws significantly increased. There was no significant linear relationship among starch chain length, oil unsaturation and straw performance. Among seven starch straws, S-SO had the strongest hydrogen bond interaction (3289 cm) and relaxation time (0.96 ms). The S-CO had the highest relative crystallinity (16.82 %) and degree of double helix (1.535), hence resulting in the lowest water absorption and solubility values, the highest flexural strength (23.43 MPa), the highest ΔT value (9.93 °C) and ΔH value (4.79 J/g). S-RO had the highest thermal transition temperatures.

中文翻译：

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不同油脂添加剂对玉米淀粉秸秆耐水性的影响

研究油类添加剂对玉米淀粉秸秆、玉米油(CO)、大豆油(SO)、菜籽油(RO)、花生油(PO)、猪油(LD)和椰子油(CCO)抗水性的影响）选择并比较了含有不同油脂添加剂的淀粉秸秆的结构和性能。采用热塑性挤出法制备了玉米淀粉秸秆（CS）以及添加CO、SO、RO、PO、LD和CCO的淀粉秸秆。结果表明，油脂的掺入有效增强了淀粉秸秆的吸水性、水溶性和水膨胀性能等耐水性能。同时，淀粉秸秆的抗弯强度显着提高。淀粉链长、油不饱和度与秸秆性能之间不存在显着的线性关系。在七种淀粉吸管中，S-SO具有最强的氢键相互作用（3289 cm）和弛豫时间（0.96 ms）。 S-CO具有最高的相对结晶度（16.82％）和双螺旋度（1.535），因此吸水率和溶解度值最低，弯曲强度最高（23.43MPa），ΔT值最高（9.93℃） ）和ΔH值（4.79 J/g）。 S-RO 具有最高的热转变温度。