Wen Hu,Zhiqiang Fang,Yu Liu,Yicong Zhou,Yudi Kuang,Honglong Ning,Bo Li,Gang Chen,Yingyao Liu
Marrying a randomly distributed network of wood fibers with sodium carboxymethyl cellulose (CMC-Na) by impregnation is a scalable method to prepare highly transparent and hazy (TH) paper with superior mechanical properties. However, the poor water resistance of this TH paper is a hindrance for its practical applications. In this study, a facile protonation process along with desalination is proposed to remove the above obstacle by reducing electrostatic repulsion among CMC molecular chains while strengthening the physical cross-linking among CMC molecular chains and also between CMC-H molecular chains and wood fibers in water. Consequently, the protonated TH paper not only presents an enhanced water resistance but also shows a negligible deterioration in optical and mechanical properties compared with the untreated TH paper. Moreover, the influence of the water resistance of various substrates (PET film, untreated TH paper, and protonated TH paper) on the electrical conductivity of inkjet-printed silver nanoparticle lines on them is investigated. We expect that such water resistant, transparent paper with high optical haze may open new avenues for the innovative application of paper and bring added value to existing products.
Zhongming Song,Guodong Liu,Tianhao Wang,Jiahao Wu,Hanbin Liu,Zhijian Li
In this study, we present a novel method for fabricating flexible transparent paper substrates via epoxy resin impregnation and coating, which exhibit high transparency (90.98 %) and desirable haze (41.5 %). In this method, the epoxy resin with a refractive index close to that of cellulose fibers, is employed to effectively fill the porous structure of the paper substrate, significantly enhancing the transparency of the substrate while maintaining an appropriate haze. This not only allows for more light transmission but also facilitates light absorption and scattering at wide angles, improving the optical coupling efficiency for light-emitting devices. Additionally, the fibers in the substrate provide the skeletal structure, whilst the fiber encapsulation by the epoxy enhances the mechanical properties and chemical stability of the substrate. Simultaneously, due to the interfacial interlocking and hydrogen bonding of the conductive PEDOT:PSS spin-coated with its interacting substrate, it forms a flexible PEDOT:PSS electrode having stable physical and chemical performance. Finally, based on the excellent optical and mechanical properties of the prepared substrate, we successfully fabricate light-emitting electrochemical cells (LECs) through an all-solution processing method under ambient conditions. The LECs on the transparent paper substrate achieve superior maximum luminance ( L max = 1082.4 cd m −2 ) and current efficiency ( CE max = 1.14 cd A −1 ), surpassing those of devices prepared on conventional PET. This work proposes a novel method for the preparation of a low-cost and high-performance substrate.
危险品化学品经营许可证（带存储）