Samanta Archana, Bordes Romain
Department of Chemical Engineering, Chalmers University of Technology Gothenburg Sweden
RSC Adv. 2020 Jan 13;10(4):2396-2403. doi: 10.1039/c9ra09164e. eCollection 2020 Jan 8.
In the development of embedding devices on textiles like sensors and detectors the controlled formation of a conductive coating remains a critical point. Although there are several approaches for imparting conductivity to any textile, the challenges remain in balancing the practical aspects of the coating procedure that affect the conductivity with the associated mechanical properties of the textile along with a feasible economic viability of the process. In this research we developed an approach to deposit uniform conductive graphene surface coatings on polyester (PET) fabric using graphene oxide (GO) particles. Instead of using pre-reduced graphene oxide (rGO), an approach of coating an aqueous dispersion of hydrophilic GO particles was adopted. Stable aqueous dispersions of GO were formulated, and the dispersion properties were characterized using DLS and zeta potential before coating them onto the PET textiles. This approach not only helped in developing an aqueous coating technique but also helped in avoiding the need of any organic solvents which might have been required for coating hydrophobic rGO moieties onto the textile substrates. The uniformity of the coating was analyzed using scanning electron microscopy (SEM). Later, the GO coated textiles were reduced thermal and chemical approaches and their effects on the conductive and mechanical properties of the fabric were assessed and compared. The reduction efficacy was analyzed and compared using XPS. The conductivity and water adsorption properties were correlated to the uniformity and retainment of rGO on the surface of the conductive textiles.
在诸如传感器和探测器等纺织物上嵌入装置的开发过程中，导电涂层的可控形成仍然是一个关键点。尽管有多种方法可使任何纺织物具备导电性，但挑战在于如何平衡影响导电性的涂层工艺实际方面与纺织物相关的机械性能，以及该工艺可行的经济可行性。在本研究中，我们开发了一种使用氧化石墨烯（GO）颗粒在聚酯（PET）织物上沉积均匀导电石墨烯表面涂层的方法。我们采用的方法不是使用预还原氧化石墨烯（rGO），而是涂覆亲水性GO颗粒的水分散体。制备了稳定的GO水分散体，并在将其涂覆到PET织物上之前，使用动态光散射（DLS）和zeta电位对分散性能进行了表征。这种方法不仅有助于开发一种水性涂层技术，还避免了将疏水性rGO部分涂覆到纺织基材上可能需要的任何有机溶剂。使用扫描电子显微镜（SEM）分析了涂层的均匀性。随后，通过热还原和化学还原方法对涂覆有GO的织物进行还原，并评估和比较了它们对织物导电性能和机械性能的影响。使用X射线光电子能谱（XPS）分析和比较了还原效果。导电性和吸水性与导电织物表面rGO的均匀性和保留情况相关。
