<br>只需将胶原蛋白水凝胶浸泡在羧甲基纤维素钠溶液中即可脱水,Food Hydrocolloids

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只需将胶原蛋白水凝胶浸泡在羧甲基纤维素钠溶液中即可脱水
Food Hydrocolloids ( IF 11.0 ) Pub Date : 2024-03-14 , DOI: 10.1016/j.foodhyd.2024.110004
Jingmin Wu , Zhe Yu , Yuxin Ma , Kaidi Zhu , Jian Li , Bor-Sen Chiou , Fang Zhong , Fei Liu

胶原蛋白水凝胶的预脱水可以减少大规模生产中的能耗。本文报道了一种通过简单地将水凝胶浸入羧甲基纤维素钠（CMC）溶液中进行胶原水凝胶脱水的方法，并研究了脱水规律和可能的脱水机制。胶原水凝胶在CMC溶液中脱水，脱水率高达68%，有利于后续干燥过程，干燥时间减少至少18%。 CMC浓度、取代度(DS)、分子量(MW)和浸泡时间都是影响脱水性能的重要因素。主要的脱水机制是唐南平衡，这归因于胶原水凝胶的半渗透性和CMC引起的界面渗透压差。低分子量的CMC能够渗透到胶原蛋白水凝胶中，而高分子量的CMC即使在长时间的浸泡下仍然难以渗透到胶原蛋白水凝胶中。此外，CMC诱导的脱水不会改变胶原纤维结构。该研究为胶原基材料的预脱水提供了新的途径，也有助于胶原凝胶材料的设计。

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Dehydration of collagen hydrogel simply by immersion in sodium carboxymethylcellulose solution

Pre-dehydration of collagen-based hydrogel can result in reduced energy consumption in their large-scale production. This article reported a method to dehydrate collagen hydrogel by simply immersing hydrogel into sodium carboxymethylcellulose (CMC) solution, and the dehydration regularity and possible dehydration mechanisms were investigated. Collagen hydrogel was dehydrated in CMC solution with a dehydration rate of up to 68%, which favored the subsequent drying process as the drying time reduced by at least 18%. The CMC concentration, degree of substitution (DS), molecular weight (MW), and immersion time were all important factors affecting dehydration performance. The main dehydration mechanism was shown to be the Donnan equilibrium, which was attributed to the semi-permeability of the collagen hydrogel and the osmotic pressure difference at the interface induced by the CMC. Low MW CMC was able to penetrate into collagen hydrogel while high MW CMC was still difficult in penetrating into collagen hydrogel even in prolonged immersion time. Moreover, CMC-induced dehydration did not change the collagen fiber structures. This study provides a new pathway for the pre-dehydration of collagen-based materials, and also can help the design of collagen gel materials.

更新日期：2024-03-14

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