Nanofiber-based composite hemodialysis membrane and preparation method thereof
A nanofiber, hemodialysis technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problem that the dialysis efficiency is not improved, and achieve good anticoagulation, novel design, high separation performance. Effect
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Embodiment 1
[0045] This embodiment provides a nanofiber-based composite hemodialysis membrane, the nanofiber-based composite hemodialysis membrane has a nanofiber composite membrane structure, including an outer layer and an inner layer, and the outer layer of the nanofiber-based composite hemodialysis membrane is Anticoagulant sulfided silk fibroin nanowires modified polyvinyl alcohol hydrogel skin layer, the inner layer is a nanofiber porous support layer prepared by electrospinning.
[0046] The thickness of the polyvinyl alcohol hydrogel cortex modified by the anticoagulant sulfurized silk fibroin nanowires is about 0.6 μm, the average diameter of the nanofibers in the nanofiber porous support layer is 300 nm, the deposition thickness is 40 μm, and the porosity 75%.
[0047] Concrete preparation steps are as follows:
[0048] Step 1: Polyacrylonitrile (PAN, M w =120000g / mol) 16g was dissolved in 184g of N,N-dimethylformamide (DMF) solvent, stirred at 40°C for 6h to obtain a transpar...
Embodiment 2
[0054] This embodiment provides a nanofiber-based composite hemodialysis membrane, the nanofiber-based composite hemodialysis membrane has a nanofiber composite membrane structure, including an outer layer and an inner layer, and the outer layer of the nanofiber-based composite hemodialysis membrane is Anticoagulant sulfided silk fibroin nanowires modified polyvinyl alcohol hydrogel skin layer, the inner layer is a nanofiber porous support layer prepared by electrospinning.
[0055] The thickness of the polyvinyl alcohol hydrogel cortex modified by the anticoagulant sulfurized silk fibroin nanowires is about 0.6 μm, the average diameter of the nanofibers in the nanofiber porous support layer is 300 nm, the deposition thickness is 40 μm, and the porosity 75%.
[0056] Concrete preparation steps are as follows:
[0057] Step 1 is the same as embodiment 1;
[0058] Step 2 is the same as embodiment 1;
[0059] Step 3 is the same as embodiment 1;
[0060] Step 4: Freeze-dry the...
Embodiment 3
[0063] like figure 2 As shown, this embodiment provides a nanofiber-based composite hemodialysis membrane, the nanofiber-based composite hemodialysis membrane has a nanofiber composite membrane structure, including an outer layer and an inner layer, and the nanofiber-based composite hemodialysis membrane The outer layer is a polyvinyl alcohol hydrogel skin layer modified by anticoagulation sulfurized silk fibroin nanowires, and the inner layer is a nanofiber porous support layer prepared by electrospinning.
[0064] The thickness of the polyvinyl alcohol hydrogel cortex modified by the anticoagulant sulfided silk fibroin nanowires is about 0.6 μm, such as figure 1 As shown, the nanofibers of the nanofiber porous support layer have an average diameter of 300 nm, a deposition thickness of 40 μm, and a porosity of 75%.
[0065] Concrete preparation steps are as follows:
[0066] Step 1 is the same as embodiment 1;
[0067] Step 2 is the same as embodiment 1;
[0068] Step 3 ...
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