Biocompatible, breathable and degradable microbial cellulose based triboelectric nanogenerator for wearable transient electronics
Biocompatible, breathable and degradable microbial cellulose based triboelectric nanogenerator for wearable transient electronics
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用于可穿戴瞬态电子产品的生物相容性、透气性和可降解的基于微生物纤维素的摩擦纳米发电机
DOI：
10.1016/j.nanoen.2023.108628
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发表时间：
2023
期刊：
影响因子：
17.6
通讯作者：
Fatma B
中科院分区：
文献类型：
--
作者：
Fatma B
天然生物材料加工的进展为开发生物友好和可持续的摩擦电纳米发电机（TENG）带来了新的方法。特别是，基于细菌纤维素（BC）的TENG已经引起了相当大的关注，尽管它们仍然缺乏瞬态可穿戴电子产品的关键组合。在此，我们报告了一种新的和简便的方法，在原位化学修饰的BC的可降解的，透气的和生物相容性的摩擦电纳米发电机（TENG）的制造。为了实现这一点，聚多巴胺，聚吡咯或SiO2的纳米涂层已被用来装饰BC纳米纤维，从而调整BC层的表面电位。这样的修改使得能够在摩擦电系列中重新定位BC，从而允许制造各种基于BC的TENG设备。发现基于聚多巴胺的BC TENG表现出上级性能（当与作为负摩擦电的PVDF耦合时），最大输出电压为1010 V，功率密度为108.7 W/m2，与原始BC（VOC= 530 V，Pout= 1.1 W/m2）相比，功率密度提高了7倍。值得一提的是，发现所有纳米涂覆的BC膜都是透气的、生物/血液相容的和可降解的，满足瞬态电子器件的主要标准。作为概念验证，我们还展示了一种基于单电极全BC TENG的身体生物力学能量采集器，能够在身体运动时产生40 V的输出电压。这种TENG技术提供了独特的性能组合，并有可能在可穿戴电子设备和体内应用中实现。
Advances in the processing of natural biomaterials have brought to the fore new approaches for the development of biofriendly and sustainable triboelectric nanogenerators (TENGs). In particular, bacterial cellulose (BC)-based TENGs have attracted considerable attention even though they still lack the key combination for transient wearable electronics. Herein, we report on a novel and facile method for in situ chemical modification of BC for the fabrication of degradable, breathable and biocompatible triboelectric nanogenerators (TENG). To achieve that, nanocoatings of polydopamine, polypyrrole or SiO2have been used to decorate BC nanofibrils and thus tune the surface potential of the BC layer. Such a modification enables the repositioning of BC in the triboelectric series, allowing for the fabrication of various BC-based TENG devices. Polydopamine based BC TENG is found to exhibit superior performance (when coupled with a PVDF as negative triboelectric) with a maximum output voltage of ∼1010 V and a power density of ∼8.7 W/m2, a 7-fold enhancement in the power density as compared to pristine BC (VOC= 530 V and Pout= 1.1 W/m2). It is worthmentioning that all the nanocoated-BC films are found to be breathable, bio-/hemo-compatible and degradable, fulfilling the main criteria for transient electronics. As a proof of concept, we also demonstrate an on-body biomechanical energy harvester based on a single electrode All-BC TENG with the capability to generate an output voltage of 40 V upon physical motion. This TENG technology provides a unique combination of properties and has the potential to be implemented in wearables electronics and in vivo applications.