Ding Wei, Guo Song, Wang Kanglei, Pang Xiaoyan, Asres Bernabas Seyoum, Ding Zhiwen
College of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, PR China.
School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, PR China; China Leather and Footwear Research Institute Co. Ltd., Beijing 100015, PR China.
Int J Biol Macromol. 2025 Jan;284(Pt 1):138104. doi: 10.1016/j.ijbiomac.2024.138104. Epub 2024 Nov 26.
Developing high-performance biobased composite films has garnered increasing attention in recent years. Herein, a new nano-reinforcement strategy for gelatin-chitosan composite film (GCCF) was proposed. Aminated graphene oxide (AGO) was first prepared via the modification of GO using ethylenediamine, and subsequently incorporated into GCCF to finally fabricate an AGO modified GCCF composite film (AGCCF). FTIR and XPS indicated that GO underwent partial reduction upon interaction with ethylenediamine. XRD, SEM and AFM suggested that AGO contributed to a more amorphous and even network structure of AGCCF. Notably, at an AGO concentration of 1.0 %, the moisture content decreased to 9.09 %, the swelling ratio was reduced by approximately 38.62 %, and water vapor permeability diminished by about 22.60 %. Furthermore, as the concentration of AGO increased, there was a corresponding decrease in transparency and a darkening in color observed for AGCCF. Specifically, the transmittance at 280 nm for AGCCF with the highest AGO dosage (1.0 %) decreased by 55.96 %, indicating improved UV shielding efficiency compared to GCCF. Additionally, the tensile strength of AGCCF reached up to 23.88 MPa, representing an increase of 359.23 % relative to that of GCCF (5.20 MPa). These findings suggest that the developed high-performance AGCCF holds considerable promise for applications in biopackaging.
近年来，开发高性能生物基复合薄膜受到了越来越多的关注。在此，我们提出了一种用于明胶-壳聚糖复合薄膜（GCCF）的新型纳米增强策略。首先通过乙二胺对氧化石墨烯（GO）进行改性制备了胺化氧化石墨烯（AGO），随后将其掺入GCCF中，最终制备出AGO改性的GCCF复合薄膜（AGCCF）。傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）表明，GO与乙二胺相互作用后发生了部分还原。X射线衍射（XRD）、扫描电子显微镜（SEM）和原子力显微镜（AFM）表明，AGO有助于AGCCF形成更无定形且均匀的网络结构。值得注意的是，当AGO浓度为1.0%时，水分含量降至9.09%，溶胀率降低了约38.62%，水蒸气透过率降低了约22.60%。此外，随着AGO浓度的增加，AGCCF的透明度相应降低，颜色变深。具体而言，AGO用量最高（1.0%）的AGCCF在280nm处的透光率下降了55.96%，表明与GCCF相比，其紫外线屏蔽效率有所提高。此外，AGCCF的拉伸强度高达23.88MPa，相对于GCCF（5.20MPa）提高了359.23%。这些发现表明，所开发的高性能AGCCF在生物包装应用中具有很大的潜力。
