Ordered porous films of biomass-based polymers by breath figure: a review

Ordered porous films of polymers with uniform pore size and ordered porous structure are extensively applied in many fields such as separation, biology, photoelectric devices, templates, and other fields, which is the current research frontier in the field of porous films. Among different methods of preparing ordered porous films, the method of breath figure (BF) has attracted much attention due to its simplicity and adjustability. Many factors have been proved to influence the structure of the porous films by the BF method and the used polymer is the most important one. Recently, under the background of energy crisis and environmental pollution, polymers from biomass have received a lot of attention because of their advantages of low carbon, green, good biocompatibility, and easy modification. Up to now, a large number of porous films of biomass-based polymers including cellulose, polylactic acid, and urushiol-based polymers have been prepared by the BF method. Therefore, this article is to make a detailed review of the physicochemical modification of biomass-based polymers, the preparation of ordered porous films via BF and their applications. The method of BF is firstly introduced. The research progress of porous films of biomass-based polymers including cellulose, polylactic acid, and urushiol-based polymers prepared by the BF method is then reviewed. Finally, this review highlights the use of honeycomb films as cell culture substrates, drug delivery, wound dressings, optoelectronic devices and mimicking woody cell walls. The prospects for the development of porous films of biomass-based polymers are proposed. Future research could focus on the preparation of ordered, functional, and biocompatible porous films with smaller pore sizes for more applications in different fields, such as separation, tissue engineering, and controlled release of drugs. [GRAPHICS] .

Automated summary

The method of breath figure (BF) has attracted much attention due to its simplicity and adjustability for preparing ordered porous films. Polymers from biomass have received a lot of attention because of their advantages of low carbon, green, good biocompatibility, and easy modification. This article reviews the physicochemical modification of biomass-based polymers and the preparation of ordered porous films via BF. Future research could focus on the preparation of ordered, functional, and biocompatible porous films with smaller pore sizes for more applications in different fields.