Key Laboratory of Food Processing Technology and Quality Control in Shandong Province, College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271000, PR China.
China School of Biology and Brewing Engineering, Taishan University, Tai'an 271000, PR China.
Carbohydr Polym. 2022 Jun 1;285:119270. doi: 10.1016/j.carbpol.2022.119270. Epub 2022 Feb 21.
In this study, four HG-type pectins were obtained using hydrochloric acid extraction (HA-HP), citric acid extraction (CA-HP), ultrasonic-assisted extraction (UA-HP), and microwave-assisted extraction (MA-HP). Four pectin films (HA-HPF, CA-HPF, UA-HPF, and MA-HPF) were prepared by a solution casting method, respectively. Compared to four pectins, the asymmetric COO - vibrational peak of UA-HPF, HA-HPF, and CA-HPF were blue-shifted (1604-1606 cm), while was red-shifted (1611 cm) in MA-HPF. The crystallinity was greater for HA-HPF and CA-HPF than UA-HPF and MA-HPF. Four pectin films all had relatively homogeneous surface morphology. CA-HPF had the best mechanical properties and oxygen barrier performance, HA-HPF had the best transparency. UA-HPF had the lowest hydrophilicity and water vapor permeability. MA-HPF had the best thermal stability. Our study shows that different physicochemical properties of HG-type pectins can influence the physicochemical properties of films. The difference of these properties gives the resulting film different possibilities for application.
在这项研究中，使用盐酸提取（HA-HP）、柠檬酸提取（CA-HP）、超声辅助提取（UA-HP）和微波辅助提取（MA-HP）获得了四种 HG 型果胶。分别通过溶液浇铸法制备了四种果胶膜（HA-HPF、CA-HPF、UA-HPF 和 MA-HPF）。与四种果胶相比，UA-HPF、HA-HPF 和 CA-HPF 的不对称 COO-振动峰发生蓝移（1604-1606 cm），而 MA-HPF 发生红移（1611 cm）。HA-HPF 和 CA-HPF 的结晶度大于 UA-HPF 和 MA-HPF。四种果胶膜的表面形貌均比较均匀。CA-HPF 具有最佳的机械性能和氧气阻隔性能，HA-HPF 具有最佳的透明度。UA-HPF 的亲水性和水蒸气透过率最低。MA-HPF 的热稳定性最好。我们的研究表明，HG 型果胶的不同理化性质会影响膜的理化性质。这些性质的差异赋予了所得膜不同的应用可能性。
