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Films Based on Thermoplastic Starch Blended with Pine Resin Derivatives for Food Packaging

机译:基于热塑性淀粉的薄膜与杉木树脂衍生物混合用于食品包装

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摘要

Completely biobased and biodegradable thermoplastic starch (TPS) based materials with a tunable performance were prepared for food packaging applications. Five blends were prepared by blending TPS with 10 wt%. of different pine resins derivatives: gum rosin (GR), disproportionated gum rosin (RD), maleic anhydride-modified gum rosin (CM), pentaerythritol ester of gum rosin (LF), and glycerol ester of gum rosin (UG). The materials were characterized in terms of thermo-mechanical behavior, surface wettability, color performance, water absorption, X-ray diffraction pattern, and disintegration under composting conditions. It was determined that pine resin derivatives increase the hydrophobicity of TPS and also increase the elastic component of TPS which stiffen the TPS structure. The water uptake study revealed that GR and LF were able to decrease the water absorption of TPS, while the rest of the resins kept the water uptake ability. X-ray diffraction analyses revealed that GR, CM, and RD restrain the aging of TPS after 24 months of aging. Finally, all TPS-resin blends were disintegrated under composting conditions during the thermophilic incubation period (90 days). Because of the TPS-resin blend’s performance, the prepared materials are suitable for biodegradable rigid food packaging applications.
机译:为食品包装应用准备了具有可调谐性能的完全生物化和可生物降解的热塑性淀粉(TPS)材料。通过将TP与10wt%混合来制备五种共混物。不同的松树树脂衍生物:口香糖松香(GR),不成比例的口香糖松香(RD),马来酸酐改性的胶松香(CM),口香糖松香(LF)的季戊四醇酯,GUM松香(UG)的甘油酯。在堆肥条件下,材料以热电机动行为,表面润湿性,色彩性能,吸水,X射线衍射图案和崩解的特征。确定松树树脂衍生物增加TPS的疏水性,并且还增加了加强TPS结构的TP的弹性组分。水吸收研究表明,GR和LF能够降低TP的吸水,而其余的树脂将保持水吸收能力。 X射线衍射分析显示GR,CM和RD在老化24个月后抑制TPS的老化。最后,在嗜热培养期(90天)期间,所有TPS-树脂共混物在堆肥条件下崩解。由于TPS-树脂共混物的性能,所制备的材料适用于可生物降解的刚性食品包装应用。

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