Method for preparing titanium dioxide-based synthetic paper

US11015294B2 · kind B2 · utility

Assignee

• HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY · CN

Inventors

• Hu Zhou · Shanghai, CN
• Dongdong Wang · Shanghai, CN
• Zhiling Qi · Hunan, CN
• Xuan Liu · Mission, US
• Zhihua Zhou · Shanghai, CN
• Qingquan Liu · Suzhou, CN
• Xiaofang Li · Tangxia, CN

Key dates

• Filing date: Jun 14, 2018
• Grant date: May 25, 2021
• Expiry date: Jan 2, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/02
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A method for preparing titanium dioxide-based synthetic paper capable of degrading organic pollutants, including: adding thermoplastic polyurethane particles and N,N-dimethylformamide or N,N-dimethylacetamide in a reactor, heating, and stirring to fully dissolve the thermoplastic polyurethane particles in a solvent to obtain a polyurethane solution; adding titanium dioxide powder having photocatalytic degradation property in the polyurethane solution, stirring uniformly to obtain a solid-liquid mixture, and standing for defoaming; uniformly coating the solid-liquid mixture onto a piece of release paper, soaking the release paper coated with the solid-liquid mixture into an aqueous solution of sliver nitrate having photocatalytic degradation property, completely curing the solid-liquid mixture to form a film, and soaking the release paper and the film into an aqueous solution of sodium chloride; drying, cooling, removing the release paper, and cutting the film to a proper size to obtain the titanium dioxide-based synthetic paper.