基于Hofmeister效应制备高强韧壳聚糖气凝胶

张珂; 张茜; 方宇嘉; 蔡杰

doi:10.11777/j.issn1000-3304.2022.22427

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基于Hofmeister效应制备高强韧壳聚糖气凝胶

研究论文 | 更新时间：2024-01-18

- 基于Hofmeister效应制备高强韧壳聚糖气凝胶
- Strong and Tough Chitosan Aerogels via Hofmeister Effect
- 高分子学报 2023年54卷第5期页码：731-740
- 作者机构：
  
  武汉大学化学与分子科学学院湖北省天然高分子基医用材料工程技术研究中心武汉 430072
- 作者简介：
  
  E-mail: caijie@whu.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 ┣52173105);21875170┫
- DOI：10.11777/j.issn1000-3304.2022.22427
  中图分类号：
- 纸质出版日期：2023-05-20，
  
  网络出版日期：2023-02-17，
  
  收稿日期：2022-12-10，
  
  录用日期：2023-01-31
扫描看全文
张珂,张茜,方宇嘉等.基于Hofmeister效应制备高强韧壳聚糖气凝胶[J].高分子学报,2023,54(05):731-740.

Zhang Ke,Zhang Xi,Fang Yu-jia,et al.Strong and Tough Chitosan Aerogels via Hofmeister Effect[J].ACTA POLYMERICA SINICA,2023,54(05):731-740.
张珂,张茜,方宇嘉等.基于Hofmeister效应制备高强韧壳聚糖气凝胶[J].高分子学报,2023,54(05):731-740. DOI： 10.11777/j.issn1000-3304.2022.22427.

Zhang Ke,Zhang Xi,Fang Yu-jia,et al.Strong and Tough Chitosan Aerogels via Hofmeister Effect[J].ACTA POLYMERICA SINICA,2023,54(05):731-740. DOI： 10.11777/j.issn1000-3304.2022.22427.

摘要

气凝胶在绝热保温、催化、吸附分离等领域有着广泛的应用，通常需要对气凝胶的微观结构和力学性能进行调控以满足特定需求. 然而，开发绿色技术制备高强韧天然高分子气凝胶仍然面临巨大的挑战. 本文报道了在壳聚糖新溶剂中基于Hofmeister效应调控壳聚糖分子链的侧向聚集和重结晶，影响壳聚糖水凝胶和气凝胶的微观形貌、孔隙结构和力学性能等物理性质，构建出高强韧壳聚糖气凝胶. 通过改变盐的种类，可以有效调控壳聚糖水凝胶和气凝胶的力学性能，并显示出遵循Hofmeister序列的规律. 壳聚糖气凝胶的拉伸强度、杨氏模量和断裂功最高可达(23.1±0.4) MPa、(198.0±43.8) MPa和(9.6±0.9) MJ/m

，比表面积最高可达410 m

/g. 这种简单策略有助于制备高强韧壳聚糖气凝胶，在柔性电子器件、组织工程材料、药物/蛋白载体和催化等领域有潜在应用前景.

Abstract

Aerogels have been extensively used in a variety of fields

such as thermal insulation

catalyst supports

adsorption and separation

and so on. Aerogels often need modification of their microstructure and mechanical properties to satisfy particular requirements. However

creating green technology to produce aerogels with high strength and toughness based on natural polymers remains a significant issue. In this work

we present a strategy for constructing chitosan aerogels with high strength and toughness by controlling the lateral aggregation and recrystallization of chitosan chains with salt ions

thereby influencing the morphology

pore structure

and mechanical properties of chitosan aerogels

via

the Hofmeister effect. The mechanical properties of chitosan hydrogels and aerogels may be efficiently manipulated by altering the anions and cations of salts

as shown by the Hofmeister effect. Chitosan aerogels have a maximum tensile strength of (23.1±0.4) MPa

Young's modulus of (198.0±43.8) MPa

and fracture work of (9.6±0.9) MJ/m

and a maximum specific surface area of 410 m

/g. This straightforward method simplifies the production of chitosan aerogels with high strength and toughness

which have potential uses in flexible electrical devices

tissue engineering materials

drug/protein carriers

and catalysts.

关键词

壳聚糖气凝胶Hofmeister效应聚集态结构力学性能

Keywords

ChitosanAerogelsHofmeister effectAggregation state structureMechanical properties

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