Abstract: The invention relates to the field of industrial wastewater treatment, and particularly discloses a nanofiltration membrane for treating printing and dyeing wastewater and its preparation method. The preparation method comprises the following steps: S1, pouring an aqueous solution containing m-phenylenediamine, camphorsulfonic acid and triethylamine onto the surface of a polysulfone ultrafiltration membrane, setting still for 10 s to 30 s, and then removing the excess aqueous solution from the surface; S2, pouring an organic solution containing trimesoyl chloride and an interface auxiliary polymerization agent onto the surface of the membrane obtained in step S1, reacting for 5 s to 20 s, and then removing the excess solution from the surface; and S3, setting the membrane obtained in step S2 still and then carrying out heat treatment and water rinsing on the membrane in sequence, thus obtaining the nanofiltration membrane.

Abstract: The invention relates to the field of industrial wastewater treatment, and particularly discloses a nanofiltration membrane for treating printing and dyeing wastewater and its preparation method. The preparation method comprises the following steps: S1, pouring an aqueous solution containing m-phenylenediamine, camphorsulfonic acid and triethylamine onto the surface of a polysulfone ultrafiltration membrane, setting still for 10 s to 30 s, and then removing the excess aqueous solution from the surface; S2, pouring an organic solution containing trimesoyl chloride and an interface auxiliary polymerization agent onto the surface of the membrane obtained in step S1, reacting for 5 s to 20 s, and then removing the excess solution from the surface; and S3, setting the membrane obtained in step S2 still and then carrying out heat treatment and water rinsing on the membrane in sequence, thus obtaining the nanofiltration membrane.

Abstract: A medical device and a storage box for a medical article are provided, where the medical device at least includes a main case having at least two exposed chamber outer walls and an accommodation compartment for accommodating a medical article. The at least two exposed chamber outer walls enclose an accommodation chamber to accommodate a functional module. The accommodation compartment is disposed on the main case and adjacent to the accommodation chamber. The accommodation compartment includes at least one exposed compartment outer wall, and the at least one exposed compartment outer wall is connected to the at least one chamber outer wall of the main case. The medical device enables the medical article to be well accommodated in the accommodation compartment, and the accommodation compartment can be flexibly configured onto the medical device to decrease the space occupied by the accommodation compartment.