{"title":"Bioinspired poly(vinyl alcohol) films with tunable adhesion and self-healing for biodegradable electronics and beyond","authors":"","doi":"10.1016/j.susmat.2024.e01084","DOIUrl":null,"url":null,"abstract":"<div><h3>Abstract</h3><p>Polymers have attracted attention for their use in enabling biodegradable electronics. However, many polymers suitable as substrates either have no adhesion or suffer from weak and unstable adhesion. Addressing this challenge, we report a simple method to achieve tunable adhesion on various surfaces for wide applications. We achieve this by combining poly(vinyl alcohol) (P), dopamine (DA) and citric acid (CA) to produce modified poly(vinyl alcohol) adhesive films. These films are derived from bio-based constituents through an environmentally benign, easily reproducible and scalable fabrication process. They offer strong adhesion to various surfaces, such as stainless steel (138–191 kPa) and Polytetrafluoroethylene (PTFE) (67–93 kPa) and facilitate easy detachment with water. Notably, the modified films showed a better degradation compared to pristine P films under anaerobic conditions. The extent of degradation was characterized both quantitatively and qualitatively. The biokinetic parameters of anaerobic digestion process were estimated using three different kinetic models. It is anticipated that DA and CA molecules penetrate the interplanar distance of P chains as supported by powder X-ray diffraction (XRD) studies, thus, accelerating the degradation process. Additionally, the inclusion of CA enhanced the stability of DA molecules against oxidation, increased the extent of H-bonding and acted as a plasticizer. The addition of DA and CA bestowed the films with self-healing property due to the presence of multiple H-bonds. Tensile experiments revealed that the strength of self-healed samples approached that of pristine samples. The findings of this study hold promise for the development of innovative, biodegradable poly(vinyl alcohol)-based self-healing adhesive films with potential applications across various domains like smart packaging, soft robotics, on-skin electronic tattoos and self-healing electronics.</p></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":8.6000,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214993724002641/pdfft?md5=c1aa8399aa9e777f2f6a48579cac6e66&pid=1-s2.0-S2214993724002641-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sustainable Materials and Technologies","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214993724002641","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
Polymers have attracted attention for their use in enabling biodegradable electronics. However, many polymers suitable as substrates either have no adhesion or suffer from weak and unstable adhesion. Addressing this challenge, we report a simple method to achieve tunable adhesion on various surfaces for wide applications. We achieve this by combining poly(vinyl alcohol) (P), dopamine (DA) and citric acid (CA) to produce modified poly(vinyl alcohol) adhesive films. These films are derived from bio-based constituents through an environmentally benign, easily reproducible and scalable fabrication process. They offer strong adhesion to various surfaces, such as stainless steel (138–191 kPa) and Polytetrafluoroethylene (PTFE) (67–93 kPa) and facilitate easy detachment with water. Notably, the modified films showed a better degradation compared to pristine P films under anaerobic conditions. The extent of degradation was characterized both quantitatively and qualitatively. The biokinetic parameters of anaerobic digestion process were estimated using three different kinetic models. It is anticipated that DA and CA molecules penetrate the interplanar distance of P chains as supported by powder X-ray diffraction (XRD) studies, thus, accelerating the degradation process. Additionally, the inclusion of CA enhanced the stability of DA molecules against oxidation, increased the extent of H-bonding and acted as a plasticizer. The addition of DA and CA bestowed the films with self-healing property due to the presence of multiple H-bonds. Tensile experiments revealed that the strength of self-healed samples approached that of pristine samples. The findings of this study hold promise for the development of innovative, biodegradable poly(vinyl alcohol)-based self-healing adhesive films with potential applications across various domains like smart packaging, soft robotics, on-skin electronic tattoos and self-healing electronics.
摘要 聚合物在可生物降解电子器件中的应用已引起人们的关注。然而，许多适合用作基底的聚合物要么没有附着力，要么附着力弱且不稳定。为了应对这一挑战，我们报告了一种简单的方法，可在各种表面上实现可调的粘附性，从而实现广泛的应用。为此，我们将聚（乙烯醇）（P）、多巴胺（DA）和柠檬酸（CA）结合在一起，生产出改性聚（乙烯醇）粘合膜。这些薄膜由生物基成分制成，采用对环境无害、易于复制和可扩展的制造工艺。它们对各种表面（如不锈钢（138-191 kPa）和聚四氟乙烯（PTFE）（67-93 kPa））都有很强的粘附力，并且容易与水分离。值得注意的是，与原始 P 薄膜相比，改性薄膜在厌氧条件下的降解效果更好。降解的程度既有定量的，也有定性的。使用三种不同的动力学模型估算了厌氧消化过程的生物动力学参数。粉末 X 射线衍射（XRD）研究表明，DA 和 CA 分子会穿透 P 链的平面间距，从而加速降解过程。此外，CA 的加入增强了 DA 分子的抗氧化稳定性，提高了 H 键的结合程度，并起到了增塑剂的作用。由于存在多个 H 键，DA 和 CA 的添加赋予了薄膜自我修复的特性。拉伸实验表明，自愈合样品的强度接近原始样品的强度。这项研究的结果为开发创新的、可生物降解的聚乙烯醇基自愈合粘合薄膜带来了希望，该薄膜有望应用于智能包装、软机器人、皮肤电子纹身和自愈合电子产品等多个领域。
期刊介绍：
Sustainable Materials and Technologies (SM&T), an international, cross-disciplinary, fully open access journal published by Elsevier, focuses on original full-length research articles and reviews. It covers applied or fundamental science of nano-, micro-, meso-, and macro-scale aspects of materials and technologies for sustainable development. SM&T gives special attention to contributions that bridge the knowledge gap between materials and system designs.
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