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大豆生物解離纖維素可食性膜制備與成膜機理研究
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國家重點研發(fā)計劃項目(2016YFD0401402)和國家自然科學(xué)基金重點項目(31430067)


Preparation of EAEP Fiber Films and Its Mechanism of Film Formation
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    摘要:

    大豆生物解離技術(shù)提取油脂和蛋白后,,產(chǎn)生的殘渣主要是大豆不溶性纖維素,。合理利用該部分纖維素有益于提高生物解離技術(shù)的經(jīng)濟可行性,。以大豆生物解離纖維素為成膜基材,,加入檸檬酸,、丙三醇制備可食性膜,,研究了檸檬酸添加量,、丙三醇添加量及交聯(lián)時間對生物解離纖維素可食性膜拉伸強度,、斷裂伸長率,、水蒸氣透過率的影響,并通過響應(yīng)面法建立了上述三因素對可食性膜水蒸氣透過率影響的模型,。通過模型分析得出,,三因素對可食性膜水蒸氣透過率的影響程度從大到小依次為:丙三醇添加量、交聯(lián)時間,、檸檬酸添加量,。經(jīng)優(yōu)化得到的最佳工藝條件為檸檬酸添加量20%,、丙三醇添加量36%、交聯(lián)時間5min,;在此條件下進行試驗,,得到可食性膜的水蒸氣透過率為1.81g·m/(h·Pa·m2);通過可食性膜掃描電鏡圖得出,,在最優(yōu)工藝條件下制備的可食性膜表面較為平整光滑,。此外,紅外光譜結(jié)果表明,,可食性膜拉伸強度及水分阻隔性的增加是由于檸檬酸與生物解離纖維素發(fā)生了交聯(lián)酯化反應(yīng),,丙三醇的添加可能會影響檸檬酸與纖維素的反應(yīng)。大豆生物解離纖維素可以作為基料制備出具有較好機械性的可食性膜,,研究結(jié)果可為大豆生物解離纖維素可食性膜的生產(chǎn)提供參考,。

    Abstract:

    Enzyme-assisted aqueous extraction processing (EAEP) is an alternative method to extract oil which is safer and more environmental-friendly. EAEP results in four fractions: free oil, oil-in-water emulsion, liquid fraction (skim), and residual fraction. The surplus amounts of residual are the limitation of EAEP. The residue contains a large amount of fiber. EAEP residue fiber based edible films containing citric acid and glycerol was prepared. In the single-factor experiment, the effect of citric acid concentration, glycerol concentration, crosslink time on the tensile strength, elongation at break, water vapor permeability of EAEP residue fiber based edible films was studied. In order to optimize the process parameters and investigate the interrelationship between the three factors and water vapor permeability, response surface methodology was employed. Results indicated that the water vapor permeability was influenced the most by glycerol concentration, crosslink time and the least by citric acid concentration. The optimum conditions were as follows: citric acid concentration of 20%, glycerol concentration of 36% and the crosslink time of 5min. Under the optimum conditions, the water vapor permeability of the EAEP residue based edible film was 1.81g·m/(h·Pa·m2). The scanning electron microscopy showed that the edible film prepared under the optimum process conditions had a relatively smooth surface. The infrared spectrum analysis indicated that crosslink may have taken place between citric acid and the fiber of EAEP residue. Glycerol may affect the reaction between citric acid and the fiber. The results can provide a reference for the production of EAEP residue based edible film.

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江連洲,徐靚,張莉,隋曉楠,李楊,陳惠惠.大豆生物解離纖維素可食性膜制備與成膜機理研究[J].農(nóng)業(yè)機械學(xué)報,2017,48(8):335-342. JIANG Lianzhou, XU Liang, ZHANG Li, SUI Xiaonan, LI Yang, CHEN Huihui. Preparation of EAEP Fiber Films and Its Mechanism of Film Formation[J]. Transactions of the Chinese Society for Agricultural Machinery,2017,48(8):335-342.

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  • 收稿日期:2017-05-08
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  • 在線發(fā)布日期: 2017-08-10
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