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Theaim of this study was to control the preparation of novel functionalpapers. The morphology of the polyamide (nylon-2,8) prepared on thepaper surface using interfacial polymerization was investigated. Afterimpregnation with ethylenediamine (EDA) solution and NaOH solution,filter paper was placed in a beaker containing organic solvent (cyclohexane,chloroform, or cyclohexane–chloroform solvents (volume ratio= 3:1, 1:1, 1:3), a mixture of terephthaloyl chloride, and trimesoylchloride. When cyclohexane was used as the organic solvent, a nylon-2,8capsule structure formed on the paper surface. For cyclohexane–chloroformsolvents, the nylon-2,8 morphologies were fibrous or porous accordingto the EDA concentration and the organic solvent type. These resultswere attributed to differences in the spreading coefficient (S) of the organic EDA solution adsorbed on the paper surfaceand the partition coefficient (P) shown by the dispersionof EDA fixed on the paper from the aqueous phase to the organic phase.Acetaldehyde adsorption was also dependent on the morphology of thenylon-2,8. Optimum conditions for this study were found to be 10%EDA and a cyclohexane:chloroform ratio = 3:1. Interfacial polymerizationreaction is a novel and effective technique for preparing functionalpaper. [ABSTRACT FROM AUTHOR]

In this study, preparation of a nylon film-TiO 2 composite sheet with both physical durability under UV irradiation and TiO 2 photocatalysis functionality was investigated. First, a nylon film was directly prepared on paper by interfacial polymerization using ethylenediamine and terephthaloyl chloride in a cyclohexane-chloroform mixture (3:1, v/v). Next, the nylon-coated paper was treated with tetraethyl orthosilicate and 3-aminopropyltrimethoxysilane to prepare polysiloxane on its surface. This was followed by fixation of TiO 2 powder via electrostatic interactions with the polysiloxane. Although nylon films on paper usually decompose under TiO 2 photocatalysis, the nylon film-TiO 2 composite sheets prepared using 0.5%-1.0% (w/v) TiO 2 did not decompose under photocatalysis. The residual rate of strength of the sheet remained at almost 100% after 240 h, which could be attributed to protection of the sheet by the polysiloxane layer. The nylon film was fibrous and could effectively adsorb acetaldehyde gas. All of the nylon film-TiO 2 composite sheets prepared using 0.5%-5.0% TiO 2 photocatalytically removed acetaldehyde under UV irradiation and no acetaldehyde gas was detected after 240-300 min. These results show the nylon film-TiO 2 composite sheet can effectively remove acetaldehyde gas by photocatalysis and adsorption and could be applied to removal of volatile organic compounds in indoor air., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier Ltd. All rights reserved.)