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FH|华中农业大学:湿法纺丝制备酵母蛋白基纤维及其组装仿肉制品的开发与表征

  • 2026-05-16 15:43:15
FH|华中农业大学:湿法纺丝制备酵母蛋白基纤维及其组装仿肉制品的开发与表征

Food Hydrocolloids| 湿法纺丝制备酵母蛋白基纤维及其组装仿肉制品的开发与表征

近日,华中农业大学团队在《Food Hydrocolloids》期刊(一区,IF:12.4)发表题为《Development and characterization of yeast protein-based fibers prepared by wet-spinning and meat analogues assembled from them》的研究论文。该研究针对酵母蛋白分散性差、溶解度低的问题,采用湿法纺丝制备酵母蛋白 / 海藻酸钠复合蛋白纤维,并系统探究酵母蛋白浓度对纺丝液体系与纤维性能的影响。研究发现酵母蛋白与海藻酸钠间存在静电相互作用,可实现均匀分散,复合液呈现假塑性流体行为。随酵母蛋白含量升高,纤维直径与持水性提升,但热稳定性与力学性能下降。经谷氨酰胺转氨酶组装得到的酵母蛋白仿肉制品,在硬度、咀嚼性等关键质构指标上与真实牛排高度相似,证实湿法纺丝用于制备酵母蛋白仿肉的可行性,为微生物蛋白在替代肉领域的应用提供理论与技术支撑。

Background

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随着全球人口持续增长,人类对肉类蛋白的需求不断攀升,开发可持续、高品质的替代蛋白已成为食品领域重要科学问题。植物蛋白虽已广泛应用,但微生物蛋白尤其是酵母蛋白,凭借生产周期短、工业化程度高、环境依赖度低、氨基酸组成均衡、体外消化率超 85% 且致敏性低等优势,成为极具潜力的新型替代蛋白。然而,酵母蛋白在中性条件下易聚集、分散性差、溶解度低,采用传统挤压工艺难以形成致密纤维结构,无法模拟真实肉类的质构与口感。湿法纺丝凭借海藻酸钠与钙离子绿色离子交联的优势,适合制备食品级蛋白纤维,但现有研究多局限于可溶性植物蛋白且蛋白载量偏低。基于此,本研究将酵母蛋白与海藻酸钠复合,通过湿法纺丝克服溶解度限制,系统探究体系相互作用、纤维结构性能,并利用谷氨酰胺转氨酶组装仿肉制品,为酵母蛋白在人造肉领域的高效应用提供理论与技术支撑。

Results

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复合体系存在静电作用且分散稳定

酵母蛋白与海藻酸钠之间存在显著的静电相互作用,海藻酸钠的长链结构可有效阻碍酵母蛋白聚集,使酵母蛋白在溶液中保持均匀分散、无相分离,为稳定纺丝提供微观结构基础。随着酵母蛋白比例提高,体系绝对电位值逐步降低,呈现明显浓度依赖性。

 纺丝液流变特性与可纺性呈浓度依赖

酵母蛋白 / 海藻酸钠复合纺丝液均表现为剪切变稀的非牛顿假塑性流体行为;随酵母蛋白浓度升高,体系表观黏度与结构黏度显著上升,分子缠结加剧,导致可纺性持续下降。当结构黏度超过 14 时,纺丝过程出现出丝不连续、纤维易断裂等问题。

纤维结构完整但性能呈规律性变化

在湿法纺丝全程中,酵母蛋白的二级结构保持稳定,未发生明显构象改变。随酵母蛋白含量增加,纤维直径显著增大、截面更规整,持水性显著提升,且促进自由水向不易流动水与结合水转化,更贴近肉类持水特征;但纤维水分含量、热稳定性、断裂力、伸长率、模量及韧性均逐渐下降。

确定最优配方并成功制备仿肉制品

综合蛋白载量、可纺性、纤维结构与功能特性,确定14% 酵母蛋白 + 3% 海藻酸钠为最佳纺丝体系。利用谷氨酰胺转氨酶交联组装得到的酵母蛋白仿肉制品,经煎炸后在硬度、咀嚼性、弹性、剪切力等关键质构指标上与西冷牛排无显著差异,高度模拟真实肉类口感,充分证明湿法纺丝可高效制备高品质酵母蛋白基仿肉制品。

图文赏析

Graphical abstract

Fig. 1. Zeta potential (A) and CLSM (B) images of YP/SA composite solutions with different YP concentrations. Different letters indicate significant differences between groups (P < 0.05).

Fig. 2. The curves of η-γ (A), lgτ-lgγ (B), lgη-γ1/2 (C) of SA and YP/SA composite solutions with different YP concentrations.

Fig. 3. The appearance photo (A) and SEM images (B) of SA and YP/SA composite fibers.

Fig. 4. FT-IR spectra of SA, YP, and YP/SA composite fibers.

Fig. 5. TG (A) and corresponding DTG (B) curves of SA, YP, and YP/SA composite fibers.

Fig. 6. Moisture content (A), WHC (B), T2 relaxation time distribution (C) and the proportion of water distribution (D) of SA and YP/SA composite fibers. Different letters indicate significant differences between groups (P < 0.05).

Fig. 7. Breaking force (A), elongation (B), Young's modulus (C), and toughness (D) of SA and YP/SA composite fibers. Different letters indicate significant differences between groups (P < 0.05).

Fig. 8. Effect diagram for the preparation of YP-MA (A); Hardness, chewiness, springiness, cohesiveness, and resilience of YP-MA and STK (B); Shear force and shear force energy of YP-MA and STK (C). Different letters indicate significant differences between groups (P < 0.05).

原文链接

https://doi.org/10.1016/j.foodhyd.2026.112814

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  1. CONNECT:[ UseTime:0.000457s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000858s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000336s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000299s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000643s ]
  6. SELECT * FROM `set` [ RunTime:0.000311s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000530s ]
  8. SELECT * FROM `article` WHERE `id` = 522448 LIMIT 1 [ RunTime:0.000422s ]
  9. UPDATE `article` SET `lasttime` = 1779549143 WHERE `id` = 522448 [ RunTime:0.002801s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000309s ]
  11. SELECT * FROM `article` WHERE `id` < 522448 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000474s ]
  12. SELECT * FROM `article` WHERE `id` > 522448 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000387s ]
  13. SELECT * FROM `article` WHERE `id` < 522448 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000783s ]
  14. SELECT * FROM `article` WHERE `id` < 522448 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.007011s ]
  15. SELECT * FROM `article` WHERE `id` < 522448 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000770s ]
0.108470s