不同浓度KOH溶液预处理对罗非鱼皮明胶膜性能的影响

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文章编号： 1672-6987（2023）03-0014-09； DOI： 10.16351/j.1672-6987.2023.03.002

王爱玲， 安祥生， 段殳珺， 陈苏南， 闫鸣艳*（青岛科技大学 海洋科学与生物工程学院；山东省生物化学工程重点实验室，山东 青岛 266042）

摘要： 为提高鱼皮明胶膜的品质与性能,本研究以罗非鱼皮为原料，研究不同浓度KOH溶液预处理对明胶得率和明胶膜性能的影响。结果表明：随着KOH溶液浓度的增大，明胶得率降低，吸光值减小，表明明胶的色泽和透光度增加；通过测定膜的色度、透光率和水蒸气透过率发现，当KOH溶液浓度达到07 mol·L-1及以上，明胶膜表现出较好的感官和阻隔性能；同时明胶膜的水溶性和断裂伸长率在KOH溶液浓度为07 mol·L-1时达到最大值,表现出良好的降解性能和机械性能；SEM表明，KOH溶液浓度在07 mol·L-1及以上，明胶膜的结构比较致密光滑；XRD和FT-IR谱图表明当KOH溶液浓度由04 mol·L-1增加到08 mol·L-1时，明胶膜的结晶区增加。上述结果表明：不同浓度KOH溶液预处理对罗非鱼皮明胶膜性能具有显著影响，并且综合评价各指标，以07 mol·L-1预处理制备的明胶膜性能较好。

关键词： 罗非鱼； 鱼皮； 明胶膜； 预处理

中图分类号： TS 254.9文献标志码： A

引用格式： 王爱玲， 安祥生， 段殳珺， 等. 不同浓度KOH溶液预处理对罗非鱼皮明胶膜性能的影响［J］. 青岛科技大学学报(自然科学版), 2023, 44(3): 14-22.

WANG Ailing, AN Xiangsheng, DUAN Shujun, et al. Effects of potassium hydroxide pretreatment at different concentrations on properties of gelatin film from tilapia (Oreochromis niloticus) skin［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2023， 44（3）： 14-22.

Effects of Potassium Hydroxide Pretreatment at Different Concentrations on

Properties of Gelatin Film from Tilapia (Oreochromis Niloticus) Skin

WANG Ailing, AN Xiangsheng, DUAN Shujun, CHEN Sunan, YAN Mingyan

(College of Marine Science and Biological Engineering; Shandong Provincial Key Laboratory of Biochemical Engineering,

Qingdao University of Science and Technology, Qingdao 266042, China)

Abstract: In order to improve the quality and performance of fish gelatin film, tilapia skin was used as raw material to study the effect of pretreatment with different concentrations of KOH solution on gelatin yield and gelatin film properties in the study. The results showed that with the increase of the concentration of KOH solution, the yield of gelatin decreased, and the color and transmittance of gelatin increased by the absorbance decreasing. The gelatin film exhibited better sensory and barrier properties when the concentration of KOH solution concentration reaching 07 mol·L-1 and above by measuring the chromaticity, light transmittance and water vapor permeability (WVP) of gelatin film. And the water content (WC), water solubility (WS), and elongation at break(EAB) of film showed good degradability and mechanical properties when the KOH concentration was 07 mol·L-1. Scanning electronic microscopy (SEM) showed the gelatin film structure became more compact and smooth with the KOH concentration rising to 07 mol·L-1 and above. Fourier transform infrared spectra (FT-IR) and X-ray diffraction (XRD) patterns revealed when the KOH concentration enhanced from 04 mol·L-1 to 08 mol·L-1, the crystalline region of gelatin film was increased. The above results showed that pretreatment with different concentrations of KOH solution has a significant effect on the performance of tilapia skin gelatin film, and comprehensive evaluation of each index showed that the gelatin film prepared with 07 mol·L-1 pretreatment has better performance.

Key words: tilapia; fish skin; gelatin film; pretreatment

收稿日期： 2022-05-30

基金项目： 国家自然科学基金项目（41576155，31201455）；山东省自然科学基金项目（ZR2021MD050）；青岛科技大学引进人才科研启动基金项目（010022778）.

作者简介： 王爱玲（1997—），女，硕士研究生. *通信联系人.