Composite nanofiber membrane as well as preparation method and application thereof

• Main Authors: ZHAO YAOHONG, QIAN YIHUA, LI ZHI, WANG QING, PAN SIWEI, LIN MUSONG
• Format: Patent
• Language: Chinese; English
• Published: 18.04.2023
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; BRAIDING; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; KNITTING; LACE-MAKING; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; NON-WOVEN FABRICS; SPINNING; TEXTILES; TRIMMINGS; WADDING

The invention belongs to the technical field of synthetic ester insulating oil purification, and particularly relates to a composite nanofiber membrane and a preparation method and application thereof. A preparation method of a composite nanofiber membrane is characterized by comprising the following steps: S1, preparation of a spinning precursor solution: firstly, drying PVDF powder, then respectively weighing LiCl powder, PVDF powder, an acetone solution and an N, N-dimethylformamide solution, mixing, stirring, adding nano oxide particles and an electronegative solute, performing ultrasonic dispersion, standing and defoaming, and drying to obtain the spinning precursor solution; preparing a spinning precursor solution; s2, preparation of a composite nanofiber membrane: performing electrostatic spinning operation on the prepared spinning precursor solution, and drying a fiber membrane obtained by electrostatic spinning to obtain the composite nanofiber membrane. The composite nanofiber membrane prepared by t