Bioinspired dual-response actuators with Janus structure and good biodegradability

IF 4.9 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD Cellulose Pub Date : 2023-02-28 DOI:10.1007/s10570-023-05104-z

Tiantian Yang, Jingxuan You, Chunchun Yin, Jinming Zhang, Yirong Wang, Jun Zhang

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引用次数: 1

Abstract

Smart materials that respond to external stimuli are the top choice as actuators. Herein, inspired by the natural plants, a smart dual-response actuator with Janus structure was fabricated from natural cellulose. Two cellulose derivatives with controllable chemical structure acted as the responsive elements, including ethanol-responsive cellulose 3,5-di-tert-butyl-4-hydroxybenzoate (CBH) and water-responsive carboxymethyl cellulose (CMC). Via changing the degree of substitution of 3,5-di-tert-butyl-4-hydroxybenzoate, the solubility, swellable property and swellable ratio of CBH in ethanol were precisely adjusted. After transforming the partial carboxylate group into the carboxylic acid, water-swellable CMC was obtained. Combining the ethanol-swellable CBH with water-swellable CMC by two-step blade-coating process, a Janus film was fabricated with dual-driven motility and complete biodegradability. This eco-friendly dual-responsive film can predict the concentration of ethanol/water mixture according to the different deformation angle. Moreover, it can be acted as a dual-responsive single-pole double-throw switch, indicating a huge potential in practical eco-friendly actuator.

Graphical abstract

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具有Janus结构和良好生物降解性的仿生双响应驱动器

响应外部刺激的智能材料是执行器的首选。在此，受天然植物的启发，以天然纤维素为材料，制作了具有Janus结构的智能双响应驱动器。两种化学结构可控的纤维素衍生物作为反应元件，分别为乙醇反应型纤维素3,5-二叔丁基-4-羟基苯甲酸酯(CBH)和水反应型羧甲基纤维素(CMC)。通过改变3,5-二叔丁基-4-羟基苯甲酸酯的取代度，可以精确调节CBH在乙醇中的溶解度、溶胀性能和溶胀比。将部分羧酸基转化为羧酸，得到可水膨胀的CMC。采用两步法将乙醇可膨胀CBH与水可膨胀CMC结合，制备了具有双驱动运动和完全生物降解的Janus膜。这种环保的双响应膜可以根据不同的变形角度预测乙醇/水混合物的浓度。此外，它还可以作为双响应单极双投开关，在实际的环保执行器中具有巨大的潜力。图形抽象

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来源期刊

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.