当前位置:首页>南昌>IF=12.4!南昌大学食品科学与技术国家重点实验室:蛋清蛋白-没食子酸-黄原胶基乳液及油凝胶的构建与表征

IF=12.4!南昌大学食品科学与技术国家重点实验室:蛋清蛋白-没食子酸-黄原胶基乳液及油凝胶的构建与表征

  • 2026-02-13 11:17:00
IF=12.4!南昌大学食品科学与技术国家重点实验室:蛋清蛋白-没食子酸-黄原胶基乳液及油凝胶的构建与表征

图文来源:作者团队

离蛋清蛋白-没食子酸-黄原胶基乳液及油凝胶的构建与表征

南昌大学食品科学与技术国家重点实验室Yuzhong Yan(第一作者),张国文教授(通讯作者)在期刊Food Hydrocolloids》(IF:12.4)上发表了题为Construction and characterization of egg white protein-gallic acid-xanthangum-based emulsion and oleogel的论文。

01
研究背景

固体油脂因其良好的风味口感与稳定性能,在食品制造中应用广泛。然而,其含有大量饱和脂肪酸与反式脂肪酸,过量摄入可能引发多种疾病。为满足人们对健康食品的追求,寻找固体脂肪替代品的需求日益迫切,油凝胶技术因此逐渐受到研究者的关注。油凝胶是一种高含油量(通常大于90%)的粘弹性固体,由少量凝胶因子与液态油脂构成。该体系稳定性高,且能显著降低产品中饱和脂肪酸与反式脂肪酸的含量。

目前制备油凝胶最常用的方法是直接将凝胶因子分散于液态油脂中形成凝胶体系。通常通过向油脂中添加蜡类、植物甾醇、单硬脂酸甘油酯等凝胶剂快速形成油凝胶,但此类方法仍存在用量偏高或成分本身不够健康等局限。另一类基于亲水性生物大分子的凝胶剂具有原料丰富、成本低且安全性高的优势,然而此类两亲性或亲水性聚合物大多无法像小分子凝胶剂那样直接分散于油脂中形成凝胶,通常需通过间接法制备。在乳液脱水过程中,液滴的稳定性至关重要,因此需要构建具有足够稳定界面层的乳液体系。

蛋白质分子通常同时具有亲水端与疏水端,可分别锚定于水相和油相中,从而稳定油水界面,具备作为乳化剂的潜力。多糖作为高亲水性物质,具有高黏度特性,常作为增稠剂辅助蛋白质形成稳定乳液,因此蛋白质-多糖复合物可作为新型乳化剂用于制备乳液。植物油富含大量不饱和脂肪酸,使其比固体油脂更健康,但这也意味着植物油更易发生氧化劣变。

多酚作为天然植物提取的天然抗氧化剂,具备安全性和强抗氧化能力。通过共价或非共价相互作用形成的蛋白质-多酚复合物能显著增强其抗氧化性能。例如,Pan, Xu等人发现,油凝胶-明胶-原花青素体系中的氧化产物含量远低于油凝胶-明胶体系,表现出良好的抗氧化活性。Yan等人研究指出,基于牛血清白蛋白-绿原酸-葡聚糖三元共价复合物制备的乳液,比单独使用蛋白质制备的乳液具有更好的稳定性和抗氧化活性。因此推测,通过三元共价复合物制备的油凝胶也可能具备良好的凝胶网络结构和氧化稳定性。

蛋清蛋白是食品工业中常用的混合蛋白质,包含卵白蛋白、伴白蛋白、卵类粘蛋白及卵粘蛋白等成分,含有人体所需全部必需氨基酸。Alavi和Chen利用纳米原纤维化蛋清蛋白-果胶复合物制备的乳液表现出良好的流变特性与稳定性。黄原胶是一种由假黄单胞菌发酵产生的多糖,可与带正电荷的蛋白质相互作用并修饰其性质。黄原胶较其他多糖具有更优的增稠效果,与蛋白质相互作用时能显著提升乳化性与稳定性。Xie和Hettiarachchy制备的大豆分离蛋白-黄原胶复合物中,大豆分离蛋白的溶解度显著提高,其乳化指数约为单独使用时的4倍。没食子酸作为一种多酚类物质,具有较强的抗氧化活性,广泛用于抑制油脂、油性食品及肉类的氧化。此外,有研究表明没食子酸与乳清蛋白结合能显著增强乳液的稳定性与抗氧化性能。

02
研究结论

该研究通过构建蛋清蛋白-没食子酸-黄原胶三元共价复合物,制备了不同复合物浓度的乳液及油凝胶,并分别对其微观结构和性能进行了探究。复合物浓度对乳液及油凝胶的微观结构和性能具有显著影响。对于乳液体系,复合物浓度越高,乳液稳定性越强,且其流变特性可通过调节复合物浓度进行调控;高浓度复合物制备的乳液具有更高的粘度和更优的粘弹性。对于油凝胶体系,所有油凝胶均表现出良好的热稳定性;高浓度复合物制备的油凝胶可形成较厚的界面层包裹油滴,具备更强的持油能力、更高的机械强度及更优的抗氧化性能。这些发现为健康型油凝胶的制备及其在食品工业中替代部分固体脂肪的应用提供了理论依据。

03
创新点

(1)采用乳液模板法制备蛋清蛋白-没食子酸-黄原胶油凝胶。

(2)0.6–1.0wt%复合物制备的乳液表现出类凝胶特性。

(3)所有油凝胶的持油能力均超过75.86%。

(4)提高复合物浓度可增强油凝胶的凝胶强度。

(5)油凝胶较玉米油具有更优的氧化稳定性。

04
图文赏析

基金支撑:

该研究获得以下项目资助:国家自然科学基金项目(编号:22078143)、江西省财政科技专项“合同制”示范项目(编号:ZBG20230418035),以及南昌大学食品科学与资源挖掘全国重点实验室科研项目(编号:SKLF-ZZB-202331)。

原文链接:

 https://doi.org/10.1016/j.foodhyd.2023.109720 

如需原文文章,可以扫描下方二维码添加科研小助领取

翻译:陈雨蒙

编辑:科研小助

审核:席书敏

专家指导:张丽霞

供稿团队:花生资源挖掘与品质调控创新团队

免责声明:本平台推送文章仅供学术交流,本平台不主张原文的版权,如有侵权,请联系删除。文献解读如有疏漏之处,我们深表歉意,请作者团队及时联系我们,我们会在第一时间进行修改或撤稿重发,感谢您的谅解

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  1. CONNECT:[ UseTime:0.000469s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000667s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000285s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000249s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000482s ]
  6. SELECT * FROM `set` [ RunTime:0.000193s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000526s ]
  8. SELECT * FROM `article` WHERE `id` = 473429 LIMIT 1 [ RunTime:0.000886s ]
  9. UPDATE `article` SET `lasttime` = 1770968002 WHERE `id` = 473429 [ RunTime:0.014047s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.009195s ]
  11. SELECT * FROM `article` WHERE `id` < 473429 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.010945s ]
  12. SELECT * FROM `article` WHERE `id` > 473429 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.005910s ]
  13. SELECT * FROM `article` WHERE `id` < 473429 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.006089s ]
  14. SELECT * FROM `article` WHERE `id` < 473429 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001201s ]
  15. SELECT * FROM `article` WHERE `id` < 473429 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002738s ]
0.210831s