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Water Assisted Biomimetic Synergistic Process and Its Application in Water-Jet Rewritable Paper

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, Sean Xiao-An Zhang

Nat Commun. 2018 Nov 16;9(1):4819.

PMID: 30446661

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP94188	Benzyl 4-hydroxybenzoate		94-18-8	Price

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