Feasibility Study of Gelatin Preparation from the Bioinspired Collagen Aggregates by a “Two-step” Facile Degradation Method,ACS Applied Bio Materials

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Feasibility Study of Gelatin Preparation from the Bioinspired Collagen Aggregates by a “Two-step” Facile Degradation Method
ACS Applied Bio Materials ( IF 4.6 ) Pub Date : 2021-02-18 , DOI: 10.1021/acsabm.0c01215
Xuechuan Wang _{1,

2,

3} , Mengdi Hou _{1,

2} , Xinhua Liu _{1,

2,

3} , Ouyang Yue _{1,

2} , Manhui Zheng _{1,

2}

Affiliation

Gelatin is the putative research hotspot of natural products, but gelatin prepared by traditional alkali methods has seriously affected its applications due to the worryingly low molecular weight and poor gel strength. Herein, we took the lead to extract the distinct gelatin from a kind of bioinspired collagen aggregate (CA) by a two-step controlled degradation method. Structural analysis suggested that the CA better preserves the natural aggregated structure of nature collagen (typical D-periodic cross-striated pattern). Compared with the gelatin gelatinized by the conventional alkali method (G-Al) and commercial gelatin (CG), the gelatin (G-CA) from CA had a wide molecular weight distribution range, high transparency, high viscosity, and strong gel strength as expected. Meanwhile, the G-CA film exhibited better mechanical performance and thermostability than CG and G-Al films, and water vapor permeability was also higher in the G-CA film, whereas water solubility was higher in the CG and G-Al films. Thus, the G-CA film is more conducive to the use of food packaging or edible films, exhibiting more potential market application prospects. Notably, G-CA based on CA from waste hide offal provides a way to reuse leather waste resources and further realize green and clean production in leather industry.

中文翻译：

“两步法”易降解法从仿生胶原蛋白聚集体制备明胶的可行性研究

明胶是公认的天然产物研究热点，但传统碱法制备的明胶分子量低、凝胶强度差，严重影响了其应用。在此，我们率先通过两步可控降解法从一种仿生胶原蛋白聚集体（CA）中提取了独特的明胶。结构分析表明，CA 更好地保留了天然胶原蛋白的天然聚集结构（典型的 D 周期交叉条纹图案）。与常规碱法糊化的明胶（G-Al）和商品明胶（CG）相比，CA制得的明胶（G-CA）具有较宽的分子量分布范围、高透明度、高粘度和较强的凝胶强度。预期的。同时，G-CA薄膜比CG和G-Al薄膜表现出更好的机械性能和热稳定性，G-CA薄膜的水蒸气渗透性也更高，而CG和G-Al薄膜的水溶性更高。因此，G-CA薄膜更有利于食品包装或食用薄膜的使用，展现出更多潜在的市场应用前景。值得注意的是，基于废皮内脏CA的G-CA为皮革废料资源的再利用提供了一条途径，进一步实现了皮革行业的绿色清洁生产。

更新日期：2021-03-15

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