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壳聚糖性质及溶解状态对摩擦纳米发电机中溶液流变学和薄膜性能的影响

Effect of Chitosan Properties and Dissolution State on Solution Rheology and Film Performance in Triboelectric Nanogenerators.

作者信息

Araújo Francisca, Magalhães Solange, Medronho Bruno, Eivazi Alireza, Dahlström Christina, Norgren Magnus, Alves Luís

机构信息

University of Coimbra, CERES, Department of Chemical Engineering, Pólo II-R. Silvio Lima, 3030-790 Coimbra, Portugal.

Surface and Colloid Engineering, FSCN Research Centre, Mid Sweden University, SE-851 70 Sundsvall, Sweden.

出版信息

Gels. 2025 Jul 5;11(7):523. doi: 10.3390/gels11070523.

DOI:10.3390/gels11070523
PMID:40710685
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12294464/
Abstract

Chitosan films with potential application in triboelectric nanogenerators (TENGs) represent a promising approach to replace non-biobased materials in these innovative devices. In the present work, chitosan with varying molecular weights (MW) and degrees of deacetylation was dissolved in aqueous acetic acid (AA) at different acid concentrations. It was observed that the MW had a greater influence on the viscosity of the solution compared to either the acid concentration or deacetylation degree. Gel formation occurred in high-MW chitosan solutions prepared with low AA concentration. Films prepared from chitosan solutions, through solvent-casting, were used to prepare TENGs. The power output of the TENGs increased with higher concentrations of AA used in the chitosan dissolution process. Similarly, the residual AA content in the dried films also increased with higher initial AA concentrations. Additionally, hot-pressing of the films significantly improves the TENG power output due to the decrease in morphological defects of the films. It was demonstrated that a good selection of the acid concentration not only facilitates the dissolution of chitosan but also plays a key role in defining the properties of the resulting solutions and films, thereby directly impacting the performance of the TENGs.

摘要

在摩擦纳米发电机（TENG）中具有潜在应用价值的壳聚糖薄膜，是一种在这些创新设备中替代非生物基材料的有前景的方法。在本研究中，将不同分子量（MW）和脱乙酰度的壳聚糖溶解于不同酸浓度的醋酸水溶液（AA）中。结果发现，与酸浓度或脱乙酰度相比，分子量对溶液粘度的影响更大。在低AA浓度下制备的高MW壳聚糖溶液中会形成凝胶。通过溶液浇铸法由壳聚糖溶液制备的薄膜被用于制备TENG。TENG的功率输出随着壳聚糖溶解过程中使用的AA浓度升高而增加。同样，干燥薄膜中的残余AA含量也随着初始AA浓度的升高而增加。此外，由于薄膜形态缺陷的减少，对薄膜进行热压显著提高了TENG的功率输出。结果表明，酸浓度的良好选择不仅有助于壳聚糖的溶解，而且在决定所得溶液和薄膜的性质方面起着关键作用，从而直接影响TENG的性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/00d4/12294464/5c4a04382de5/gels-11-00523-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/00d4/12294464/4fc2d0e93eee/gels-11-00523-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/00d4/12294464/b6b8275095d1/gels-11-00523-g009.jpg
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本文引用的文献

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Sourcing Interchangeability in Commercial Chitosan: Focus on the Physical-Chemical Properties of Six Different Products and Their Impact on the Release of Antibacterial Agents.商业壳聚糖的来源互换性：关注六种不同产品的物理化学性质及其对抗菌剂释放的影响。
Polymers (Basel). 2025 Mar 26;17(7):884. doi: 10.3390/polym17070884.
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Rheology of Suspensions of TEMPO-Oxidised and Cationic Cellulose Nanofibrils-The Effect of Chemical Pre-Treatment.TEMPO氧化和阳离子纤维素纳米原纤悬浮液的流变学——化学预处理的影响
Gels. 2024 May 26;10(6):367. doi: 10.3390/gels10060367.
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Biopolymer Materials in Triboelectric Nanogenerators: A Review.
摩擦纳米发电机中的生物聚合物材料：综述
Polymers (Basel). 2024 May 7;16(10):1304. doi: 10.3390/polym16101304.
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Rheological and Viscoelastic Properties of Chitosan Solutions Prepared with Different Chitosan or Acetic Acid Concentrations.不同壳聚糖或乙酸浓度制备的壳聚糖溶液的流变学和粘弹性特性
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Heliyon. 2022 Jul 11;8(7):e09924. doi: 10.1016/j.heliyon.2022.e09924. eCollection 2022 Jul.
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