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东北农业大学隋晓楠、江连洲教授 Food Chemistry | 大豆‑马铃薯蛋白皮克林乳液:多糖介导的性能提升

  • 2026-08-09 09:18:31
东北农业大学隋晓楠、江连洲教授 Food Chemistry | 大豆‑马铃薯蛋白皮克林乳液:多糖介导的性能提升

导读

东北农业大学食品学院隋晓楠教授、江连洲教授团队,在食品领域权威期刊《Food Chemistry》发表研究论文《Enhancement of freeze-thaw stability and gel characteristics in soybean-potato protein Pickering emulsions regulated by polysaccharides: Focusing on physicochemical properties and microstructure》。研究选取 κ- 卡拉胶、魔芋胶、普鲁兰多糖三种食品级多糖为调控因子,系统构建马铃薯 - 大豆复合蛋白稳定的 Pickering 乳液凝胶体系,揭示了多糖分子特性与凝胶网络的构效关系,明确三种多糖在冻融稳定性、凝胶强度、弹性质构方面的差异化调控优势,从分子互作与微观结构层面阐明作用机制,为质构可调、稳定性可控的植物基脂肪替代品开发提供了系统的理论依据。

成果介绍

传统食品用固体脂肪与部分氢化油富含饱和脂肪酸与反式脂肪酸,长期过量摄入会显著提升心血管疾病、代谢综合征等慢性病风险。Pickering 乳液凝胶兼具乳液的流动性与凝胶的粘弹性,质构接近动物脂肪,是极具潜力的植物基脂肪替代方案,但单一蛋白构建的乳液凝胶普遍存在机械强度不足、热稳定性与冻融稳定性差的短板,难以适配加工与储运需求。双蛋白复合可优化营养组成与界面性能,但多糖协同调控的微观机制与构效规律尚未得到系统阐明。

本研究首先通过 pH 偏移法制备马铃薯 - 大豆复合蛋白纳米颗粒,以此为颗粒乳化剂构建高油相 Pickering 乳液,再经钙离子诱导热凝胶化形成乳液凝胶基底;分别引入 κ- 卡拉胶、魔芋胶、普鲁兰多糖三种结构特性迥异的食品多糖,设置 5:1、4:1、3:1 三个乳液 - 多糖质量梯度,系统表征体系的理化、流变、质构与微观结构特征。

研究证实,多糖的调控效应呈现显著的种类依赖性。普鲁兰多糖可有效细化乳液液滴,在 3:1 质量比下赋予体系最优冻融稳定性,凝胶持水性与持油性分别高达 98.51% 与 99.52%,同时凝胶弹性与内聚性最佳,质构细腻易吞咽;κ- 卡拉胶则显著提升凝胶硬度与储能模量,3:1 比例下形成力学强度最高的刚性网络,适配需要结构支撑的脂肪替代场景;魔芋胶的调控效果介于二者之间,可实现力学性能与弹性的平衡,满足不同产品的质构需求。

团队进一步从分子与微观层面揭示了调控机制。拉曼光谱分析证实,多糖与双蛋白之间不存在共价交联,二者主要通过空间排阻效应与氢键作用实现协同:一方面多糖作为物理填料填充凝胶网络孔隙,提升结构连续性;另一方面通过氢键诱导蛋白分子构象重排,显著提升 α- 螺旋与 β- 折叠结构占比,增强网络交联密度。低场核磁结果显示,致密均匀的三维网络可将自由水转化为不易流动水,大幅降低水分迁移率;强化的界面膜则能抵御冻融过程中冰晶生长造成的结构破坏,从本质上提升体系的冻融稳定性与持油持水能力。激光共聚焦与扫描电镜结果进一步验证,多糖通过体积排阻效应间接强化蛋白网络,使油滴分布更均匀,无明显聚集现象。

整体而言,该研究系统建立了 “多糖分子特性 - 凝胶微观结构 - 功能性能” 的构效关系,明确了三种多糖的差异化调控路径,为植物基脂肪替代品的质构定制化设计提供了精准调控手段,也为双蛋白复合 Pickering 乳液凝胶的性能优化提供了完整的理论支撑,在人造奶油、植物基酱料、低脂肉制品等食品加工领域具备广阔的应用前景。

图文鉴赏

Fig. 1. Effect of polysaccharides on droplet size, ζ-potential, apparent morphology and optical microstructure of Pickering emulsions.

Fig. 4. Effect of polysaccharides on G′ and G″ of Pickering emulsion.

原文链接

https://doi.org/10.1016/j.foodchem.2026.150602

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  1. CONNECT:[ UseTime:0.000542s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000988s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000326s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000278s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000523s ]
  6. SELECT * FROM `set` [ RunTime:0.000182s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000609s ]
  8. SELECT * FROM `article` WHERE `id` = 567850 LIMIT 1 [ RunTime:0.000463s ]
  9. UPDATE `article` SET `lasttime` = 1786248652 WHERE `id` = 567850 [ RunTime:0.001892s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000246s ]
  11. SELECT * FROM `article` WHERE `id` < 567850 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000513s ]
  12. SELECT * FROM `article` WHERE `id` > 567850 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000467s ]
  13. SELECT * FROM `article` WHERE `id` < 567850 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000784s ]
  14. SELECT * FROM `article` WHERE `id` < 567850 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002120s ]
  15. SELECT * FROM `article` WHERE `id` < 567850 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003260s ]
0.086462s