School of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China.
AVIC Xi'an Aircraft Industry Group Company Ltd., Xi'an 710089, China.
Int J Biol Macromol. 2024 Nov;279(Pt 2):134866. doi: 10.1016/j.ijbiomac.2024.134866. Epub 2024 Sep 2.
In this study, the PVA/starch blend films were prepared by dry melting method. The microstructure showed that the starch existed in the continuous PVA matrix in granular structure. When the amount of starch was 30 wt%, the tensile strength increased from 12.8 to 14.7 MPa, and the elastic modulus increased from 15.4 to 20.5 MPa, and the water absorption increased by about 2 %. The addition of starch increased the T by 8.1-29.64 °C compared to pure PVA. Considering the mechanical, hydrophilic and optical properties of the blend films, PVA/starch at 7:3 was the most promising packaging material. Notably, the blend films exhibit great reusability and renewability. Overall, these findings highlight the potential of PVA/starch blend films as environmentally friendly materials with enhanced properties.
在这项研究中，通过干法熔融法制备了 PVA/淀粉共混膜。微观结构表明，淀粉以颗粒状结构存在于连续的 PVA 基体中。当淀粉含量为 30wt%时，拉伸强度从 12.8MPa 增加到 14.7MPa，弹性模量从 15.4MPa 增加到 20.5MPa，吸水率增加了约 2%。与纯 PVA 相比，淀粉的加入使 T 提高了 8.1-29.64°C。考虑到共混膜的机械、亲水和光学性能，PVA/淀粉为 7:3 时是最有前途的包装材料。值得注意的是，共混膜具有很好的可重复使用性和可再生性。总的来说，这些发现强调了 PVA/淀粉共混膜作为具有增强性能的环保材料的潜力。
