title: Photochromic paper from wood pulp modification via layer-by-layer assembly of pulp fiber/chitosan/spiropyran.
abstract: Cellulosic fiber introducing with photochromic properties can be used in many fields such as security packaging, printing paper, and rewritable paper. To introduce photochromic property to individual fiber, a polyelectrolyte composite layer composed of cationic chitosan (CS) and anionic carboxyl-containing spiropyran (SPCOOH) on pulp fibers was designed using layer-by-layer assembly technique. Scanning electron microscope observation showed that the SPCOOH was successfully absorbed onto the surface of fiber. The photochromic characteristic of LbL-treated fiber could be triggered by UV-vis absorption spectrum and the LbL-treated fibers had a good compatibility with pulp fibers. This study gives a highly effective method to impart the photochromic characteristic to paper.
authors.affiliation: Plant micro/nano fiber research center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 516640, China.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Tian
authors.affiliation: Plant micro/nano fiber research center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 516640, China. Electronic address: febwang@scut.edu.cn.
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
authors.affiliation: Plant micro/nano fiber research center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 516640, China.
authors.forename: Jinpeng
authors.initials: J
authors.lastname: Li
authors.affiliation: Plant micro/nano fiber research center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 516640, China.
authors.forename: Jinsong
authors.initials: J
authors.lastname: Zeng
authors.affiliation: Plant micro/nano fiber research center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 516640, China.
authors.forename: Kefu
authors.initials: K
authors.lastname: Chen
mesh_terms: D001578:Benzopyrans / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D009574:Nitro Compounds / Q000737:chemistry*; D010209:Paper; D014934:Wood / Q000737:chemistry*
chemical_list: D001578:Benzopyrans; D007211:Indoles; D009574:Nitro Compounds; C088184:spiropyran; D048271:Chitosan
keywords: Carboxyl-containing spiropyran; Cationic chitosan; Layer-by-layer; Photochromic paper; Pulp fiber