Water assisted biomimetic synergistic process and its application in water-jet rewritable paper

Guan Xi, Lan Sheng (), Jiahui Du, Jinyan Zhang, Minjie Li, Hongze Wang, Yufei Ma and Sean Xiao-An Zhang ()
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Guan Xi: College of Chemistry, Jilin University
Lan Sheng: Jilin University
Jiahui Du: College of Chemistry, Jilin University
Jinyan Zhang: Jilin University
Minjie Li: College of Chemistry, Jilin University
Hongze Wang: Lucky Healthcare Limited Liability Company
Yufei Ma: Lucky Healthcare Limited Liability Company
Sean Xiao-An Zhang: College of Chemistry, Jilin University

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract The colour of water-jet rewritable paper (WJRP) is difficult to be expanded via single hydrochromic molecule, especially black. Here, inspired by the amazing phenomenon of bound-water in cells enabling various biological transformations via facilitating synergistic inter-/intra-molecular proton transfer, we present a simple strategy toward WJRP based on binary systems containing less-sensitive acidochromic dyes and mild proton donors (or developers). With such a binary system containing commercial black dye as the colouring agent, benzyl 4-hydroxybenzoate as the developer, and biomimetic bound-water as proton-transferring medium, we successfully achieve the long-awaited black WJRP. Printed images on such WJRP have excellent performances and long retaining time (>1 month). In addition, the robustness, durability and reversibility of WJRP could be increased distinctly by using polyethylene terephthalate as substrate. This strategy significantly expands hydrochromic colours to entire visible range in an eco-friendly way, which opens an avenue of smart materials for practical needs and industrialization.

Date: 2018
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DOI: 10.1038/s41467-018-07211-z

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