JAEA:开发出可生物降解的高强度凝胶:由柠檬酸,水等制成。

JAEA:开发出可生物降解的高强度凝胶:由柠檬酸,水等制成。

日本原子能机构(JAEA),
东京都产业技术研究中心(东京产业技术研究所),
东京大学

10月30日,它宣布已成功开发出一种环保型高强度凝胶材料“冷冻交联纤维素纳米纤维凝胶”。

和木材的“纤维素纳米纤维”
柠檬中含有柠檬酸
它是由水组成。
纤维素纳米纤维:

“羧甲基纤维素(CMC)纳米纤维”是一种高度安全的材料,还可用作食品添加剂和化妆品增稠剂。

该分子具有“羧基”,其是有机化合物的反应性官能团之一。

它可以与其他物质反应制成凝胶和薄膜。

这项研究:

实验中将使用CMC纳米纤维和柠檬酸。

在-20°C的环境中

在冷冻的CMC纳米纤维溶液中

混合柠檬酸溶液,

在-4°C的环境中融化。

结果,冰融化后,白色不透明的水凝胶

可以确认形成了冷冻交联的CNF凝胶。

研究冷冻交联的CNF凝胶的保水性

事实证明,“凝胶中可以包含约95%的水总量”。

详细信息已发布在国际学术期刊“ ACS Applied Polymer Materials”的在线版本中。

我的Navi新闻

https://news.mynavi.jp/article/20201104-1452145/

Eco-friendly Carboxymethyl Cellulose Nanofiber Hydrogels Prepared via Freeze Cross-Linking and Their Applications

Abstract

We developed a cross-linking method using freeze concentration and used it to synthesize

a carboxymethyl cellulose nanofiber (CMCF) hydrogel

with high water content (>94%),

high compressive strength (>80 MPa),

and high compressive recoverability.

The hydrogels
were prepared by adding an aqueous solution of citric acid (CA) to a frozen CMCF sol and then thawing the sol.

The reaction between the freeze-concentrated CMCF and CA created a rigid porous structure with a pore diameter of approximately 80 μm, which resembled the ice crystal structure.

The stress–strain curves of the hydrogel during repeated compression up to 80% strain

were similar over three cycles, which indicated that their cross-linked structure had high stability to compressive stress.

ACS Applied Polymer Materials

https://pubs.acs.org/doi/10.1021/acsapm.0c00831