食品科学 ›› 2020, Vol. 41 ›› Issue (23): 130-136.doi: 10.7506/spkx1002-6630-20191118-201

• 食品工程 • 上一篇    下一篇

超声改性对燕麦膳食纤维理化性质及结构的影响

牛希,史乾坤,赵城彬,尹欢欢,许秀颖,吴玉柱,曹勇,张浩,刘景圣   

  1. (吉林农业大学食品科学与工程学院,小麦和玉米深加工国家工程实验室,吉林 长春 130118)
  • 出版日期:2020-12-15 发布日期:2020-12-28
  • 基金资助:
    “十三五”国家重点研发计划重点专项(2016YFD0400702);吉林省科技发展计划项目(20190103121JH); 全国粮食行业领军人才项目(LL2018201)

Effect of Ultrasonic Modification on Physicochemical Properties and Structure of Oat Dietary Fiber

NIU Xi, SHI Qiankun, ZHAO Chengbin, YIN Huanhuan, XU Xiuying, WU Yuzhu, CAO Yong, ZHANG Hao, LIU Jingsheng   

  1. (National Engineering Laboratory for Wheat and Corn Deep Processing, College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China)
  • Online:2020-12-15 Published:2020-12-28

摘要: 本研究以燕麦膳食纤维为对象,采用超声波技术对燕麦膳食纤维进行改性处理,比较处理前后燕麦膳食纤维的理化性质和结构特征变化。结果表明:超声改性后的燕麦膳食纤维持水力、水膨胀力、持油力均显著提高(P<0.05);粒径、扫描电子显微镜分析结果表明经超声改性后的燕麦膳食纤维粒径减小,表面结构疏松,出现蜂巢状的多孔特征;X射线衍射、傅里叶变换红外光谱分析表明超声改性后的燕麦膳食纤维相对结晶度升高,部分纤维素组分重新分布,向可溶性膳食纤维转化;差示扫描量热仪分析表明经超声改性后的燕麦膳食纤维的热焓值明显增加,热稳定性得到改善。因此,超声处理可作为一种改性膳食纤维的优良方法,结果为提高燕麦膳食纤维的利用率及进一步挖掘其营养价值提供了参考。

关键词: 超声;燕麦;膳食纤维;理化性质;结构

Abstract: This study investigated changes in the physicochemical properties and structural characteristics of oat dietary fiber before and after ultrasonic treatment. Results showed that the water-holding capacity, water-swelling capacity and oil-holding capacity of oat dietary fiber were significantly improved by ultrasonic treatment. Particle size and scanning electron microscopic analysis showed that ultrasonic treatment reduced the particle size and loosened the surface structure, resulting in the appearance of honeycomb-like pores. X-ray diffraction and Fourier transform infrared spectroscopy analysis showed that the relative crystallinity of oat dietary fiber increased after ultrasonic modification, being partially redistributed and transformed into soluble dietary fiber. Differential scanning calorimetry (DSC) analysis showed that the thermal enthalpy (ΔH) of oat dietary fiber significantly increased after ultrasonic modification, indicating its improved thermal stability. Therefore, ultrasonic treatment can be used as an excellent method to modify dietary fiber, which will help to improve the utilization rate of oat dietary fiber and to further explore its nutritional value.

Key words: ultrasound; oat; dietary fiber; physicochemical properties; structure

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