Liu Jie, Cao Ao, Liu Yanchun, Zheng Xuejing, Tang Keyong
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, PR China.
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, PR China.
Int J Biol Macromol. 2025 May;309(Pt 4):143092. doi: 10.1016/j.ijbiomac.2025.143092. Epub 2025 Apr 11.
Soluble soybean polysaccharide (SSPS)/pullulan (PUL) blend films enriched with lavender essential oil (LEO) or clove essential oil (CEO) were prepared using the solution casting method. The structural, optical, mechanical, barrier, thermal, antioxidant, and antibacterial properties of the SSPS/PUL/LEO and SSPS/PUL/CEO films were investigated and compared. Scanning electron microscopy micrographs revealed randomly distributed micropores within the SSPS/PUL matrix after enrichment with essential oils (EOs). The addition of EOs significantly improved the UV-blocking performance, elongation at break (EAB), water resistance, antioxidant activity and hydrophobicity of the films. The results showed that the SSPS/PUL/CEO films exhibited nearly 100 % UV-blocking efficiency in the wavelength range of 190-290 nm, while achieving a maximum EAB of 90.6 ± 5.3 %. However, the tensile strength of the films decreased from 10.8 MPa to 5.6 MPa or 4.8 MPa upon the addition of 15 % LEO or CEO, respectively. Thermogravimetric analysis indicated that the addition of EOs had little effect on the thermal properties of the SSPS/PUL films. Both SSPS/PUL/LEO and SSPS/PUL/CEO films exhibited good antioxidant and antibacterial properties, with the SSPS/PUL/CEO film showing superior performance in both aspects. The results preliminarily suggest that the SSPS/PUL/EOs films have great potential to be used as active food packaging materials.
采用溶液浇铸法制备了富含薰衣草精油（LEO）或丁香精油（CEO）的可溶性大豆多糖（SSPS）/普鲁兰多糖（PUL）共混膜。对SSPS/PUL/LEO和SSPS/PUL/CEO膜的结构、光学、机械、阻隔、热、抗氧化和抗菌性能进行了研究和比较。扫描电子显微镜照片显示，在富含精油（EOs）后，SSPS/PUL基质内存在随机分布的微孔。添加EOs显著提高了膜的紫外线阻隔性能、断裂伸长率（EAB）、耐水性、抗氧化活性和疏水性。结果表明，SSPS/PUL/CEO膜在190-290nm波长范围内表现出近100%的紫外线阻隔效率，同时实现了90.6±5.3%的最大EAB。然而，添加15%的LEO或CEO后，膜的拉伸强度分别从10.8MPa降至5.6MPa或4.8MPa。热重分析表明，添加EOs对SSPS/PUL膜的热性能影响不大。SSPS/PUL/LEO和SSPS/PUL/CEO膜均表现出良好的抗氧化和抗菌性能，其中SSPS/PUL/CEO膜在两方面均表现出优异性能。结果初步表明，SSPS/PUL/EOs膜作为活性食品包装材料具有很大的潜力。
