Non-volatile conductive gels made from deep eutectic solvents and oxidised cellulose nanofibrils.
Non-volatile conductive gels made from deep eutectic solvents and oxidised cellulose nanofibrils.
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DOI：
10.1039/d0na00976h
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发表时间：
2021-04-20
影响因子：
4.7
通讯作者：
中科院分区：
文献类型：
--
作者：
离子凝胶为许多应用提供了巨大的潜力，包括可穿戴电子产品和软传感器。然而，它们的合成受到限制，并且通常依赖于不可再生或非生物相容性组分。在这里，我们提出了一种新的双组分离子凝胶只使用低共熔溶剂（DES）和纤维素。DES为水凝胶提供了一种非挥发性的替代品，具有高度可调的特性，包括具有广泛变化的疏水性的化合物的导电性和溶剂化。DES可以很容易地由便宜的、可生物降解的和生物相容的成分制成。本研究提出了一系列的软导电凝胶深共熔溶剂（DES），特别是氯化胆碱-尿素和氯化胆碱-甘油，与TEMPO氧化纤维素纳米纤维（OCNF）的唯一添加的特性。通过使用DES甜菜碱-甘油可以制备更像液体而不是凝胶状的导电材料。OCNF由可持续来源制备，无毒，对皮肤温和，形成凝胶而不需要表面活性剂或其他胶凝剂。这些DES-OCNF凝胶是剪切稀化的，在26 °C下电导率高达1.7 mS cm−1。考虑到数千种可能的DES，该系统提供了无与伦比的可调性和粘度、电导率和屈服行为等特性的定制。由低共熔溶剂和纤维素纳米纤维制成的导电剪切稀化凝胶。
Ionogels offer huge potential for a number of applications including wearable electronics and soft sensors. However, their synthesis has been limited and often relies on non-renewable or non-biocompatible components. Here we present a novel two-component ionogel made using just deep eutectic solvents (DESs) and cellulose. DESs offer a non-volatile alternative to hydrogels with highly tuneable properties including conductivity and solvation of compounds with widely varying hydrophobicity. DESs can be easily made from cheap, biodegradable and biocompatible components. This research presents the characterisation of a series of soft conductive gels made from deep eutectic solvents (DESs), specifically choline chloride-urea and choline chloride-glycerol, with the sole addition of TEMPO-oxidised cellulose nanofibrils (OCNF). A more liquid-like rather than gel-like conductive material could be made by using the DES betaine–glycerol. OCNF are prepared from sustainable sources, and are non-toxic, and mild on the skin, forming gels without the need for surfactants or other gelling agents. These DES-OCNF gels are shear thinning with conductivities up to 1.7 mS cm−1 at ∼26 °C. Given the thousands of possible DESs, this system offers unmatched tunability and customisation for properties such as viscosity, conductivity, and yield behaviour. Conductive, shear-thinning gels made from deep eutectic solvents and cellulose nanofibrils.
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影响因子：
19
作者：
Kim, Yong Min;Moon, Hong Chul
通讯作者：
Moon, Hong Chul
影响因子：
5.3
作者：
Garcia, Gregorio;Aparicio, Santiago;Atilhan, Mert
通讯作者：
Atilhan, Mert
影响因子：
19
作者：
Lee, Hae-Ryung;Woo, Jaesung;Sun, Jeong-Yun
通讯作者：
Sun, Jeong-Yun
影响因子：
11.2
作者：
Fujisawa, Shuji;Okita, Yusuke;Isogai, Akira
通讯作者：
Isogai, Akira
影响因子：
5.7
作者：
Courtenay, James C.;Johns, Marcus A.;Sharma, Ram I.
通讯作者：
Sharma, Ram I.