Abstract: Disclosed is a polymer valve material, which includes a scaffold, prepared with a first polyurethane as a raw material by electrospinning; and a composite layer, prepared with second polyurethane as a raw material and composited onto the scaffold. The present disclosure further discloses a method for preparing a polymer valve material, including: a spinning step, electrostatic spinning a first polyurethane solution to obtain a prefabricated film; a compositing step, compositing second polyurethane and the prefabricated film to obtain the polymer valve material; and an adjustment step, heat pressing the prefabricated film before or during compositing. The valve material of the present disclosure can improve the creep resistance and edge tear resistance of the valve, as well as extends its service life.

Abstract: Disclosed are a polymer valve leaflet material, a preparation method for integrally molding the same, and use thereof. The preparation method includes: a spinning step, electrospinning a first polyurethane solution to a receiving device to obtain a prefabricated film on the receiving device; and a compositing step, compositing second polyurethane with the prefabricated film to obtain the polymer valve leaflet material. The present disclosure solves the problems of uneven thickness of various parts of the leaflets, weak points inside the leaflets, and easy tearing of the leaflets at weak points in the existing impregnation process, thereby addressing the issues of easy creep, relatively low overall strength and poor tear resistance of the existing leaflets.

Abstract: A treatment method and a cleaning apparatus for an implant treated with a reagent arc disclosed. The cleaning apparatus for treating an implant treated with a reagent includes: a base; a rotatable rack for placing one or more implants; and a driving mechanism coupled with the rotatable rack.

Abstract: Provided are a pro-endothelialization biological material and method for preparation thereof, and a pro-endothelialization heart valve and method for preparation thereof and interventional system. The pro-endothelialization biological material comprises a biological material and a pro-endothelializing growth factor loaded on the surface of biological material; capable of capturing endothelial progenitor cells, enabling the endothelial progenitor cells to attach, grow, and differentiate on the surface of the biological material. The methods for preparation of the pro-endothelialization biological material comprises chemical grafting and physical coating methods. The heart valve can be prepared either by suturing followed by grafting or by grafting followed by suturing. A endothelial growth factor is directly loaded onto the surface of a biological material film, promoting the formation of endothelial cell layers on the surface of the biological material.

Abstract: A method for co-production of monophenols and cellulose by transition metal oxide catalytic oxidation of biomass is disclosed. The method uses transition metal oxide as catalyst and pretreated dry biomass as raw material to obtain high purity and selectivity of monophenolic chemicals with co-produced cellulose under mild conditions.

Abstract: The present invention discloses an aramid-based epoxy resin and a method of making same, including the steps of reacting aramid fiber powder as a raw material with a metallization reagent; grafting a plurality of ethylene oxide, propylene oxide or a mixture thereof to an activated amide group of the aramid to introduce a reactive functional group hydroxyl; and then conducting a ring-opening and closing reaction by using epichlorohydrin to obtain a liquid aramid-based epoxy resin.

Abstract: The present invention discloses an aramid-based epoxy resin and a method of making same, including the steps of reacting aramid fiber powder as a raw material with a metallization reagent; grafting a plurality of ethylene oxide, propylene oxide or a mixture thereof to an activated amide group of the aramid to introduce a reactive functional group hydroxyl; and then conducting a ring-opening and closing reaction by using epichlorohydrin to obtain a liquid aramid-based epoxy resin.