A kind of hollow fiber membrane and its preparation method and dialyzer
A fibrous membrane and hollow technology, applied in the field of hemodialysis, to achieve good hydrophilicity and avoid hemolysis
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Embodiment 1
[0031] The hollow fiber membrane of this embodiment is prepared by the following steps:
[0032] Step 1) Synthesis of Phosphate Ester-Modified Naphthalene Biphenyl Polyether Sulfone Ketone and Synthesis of Unmodified Naphthalene Biphenyl Polyether Sulfone Ketone
[0033]Take 5 g of cetyl alcohol, 5.0 g of polyphosphoric acid, and 10 g of 4-(4-hydroxy-phenyl)-2H-diazaphthalene-1-one (DHPZ) monomers in 500 mL The three-necked flask was dissolved in a mixed solvent of toluene and N,N-dimethylacetamide at 160°C to 165°C, and anhydrous potassium carbonate was added as a catalyst to carry out the reaction, and the reaction time was controlled to be 10 min. 20 g of dichlorodiphenyl sulfone and 20 g of difluorobenzophenone were successively added, and the mixture was reacted for 2 hours under stirring conditions. The product is washed with ethanol and then dried to obtain phosphate-modified heteronaphthalene biphenyl polyether sulfone ketone, which is used for later use.
[0034] Ta...
Embodiment 2
[0062] The preparation method of the hollow fiber membrane in this embodiment is basically the same as the preparation method in Example 1, the difference is that in step 4) the post-processing step of the hollow fiber membrane is heated and boiled in deionized water at 100°C for the duration of the washing time. The water washing time was adjusted according to the parameters listed in Table 1 to prepare a group of Examples 2-1 to 2-4, and the water contact angle, recalcification time, hemolysis rate and pure water flux of the obtained hollow fiber membranes were tested. The results are shown in Table 1.
[0063] Table 1 Preparation conditions and performance test results of hollow fiber membranes in Example 2
[0064]
[0065] It can be seen from Table 1: (1) The longer the water washing time of the hollow fiber membrane, the lower the water contact angle and hemolysis rate, the higher the recalcification time and the water flux, and the better the performance of the prepa...
Embodiment 3
[0068] The preparation method of the hollow fiber membrane of this embodiment is basically the same as that of the embodiment 1, and the difference lies in the composition of the membrane casting solution in step 2). Example 3-1: A hollow fiber membrane containing only non-modified naphthalene biphenyl polyether sulfone ketone was prepared without adding phosphate ester-modified naphthalene biphenyl polyether sulfone ketone to the casting solution. Experiment 3-2: Polyethersulfone hollow fibers were prepared by replacing the non-modified naphthalene biphenyl polyether sulfone ketone with polyether sulfone without adding phosphate ester-modified naphthalene biphenyl polyether sulfone ketone to the casting solution membrane. The results of the water contact angle, recalcification time, hemolysis rate and pure water flux of the prepared hollow fiber membrane are shown in Table 2 below.
[0069] Table 2 Performance test results of the hollow fiber membrane in Example 3
[0070] ...
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