阅读说明：本技术 多巴胺改性稀土屏蔽熔纺纤维膜的制备方法 (Preparation method of dopamine modified rare earth shielding melt-spun fiber membrane ) 是由 李良飞 于 2021-08-17 设计创作，主要内容包括：本发明涉及中空纤维膜技术领域,尤其涉及多巴胺改性稀土屏蔽熔纺纤维膜的制备方法,包括原料备份,取稀土30-50份,聚氨酯树脂10-20份、石墨粉3-5份、硼粉1-3份、多巴胺改性溶液70-80份和纤维膜,原料加工,将稀土进行打磨成粉,然后S1中的聚氨酯树脂、石墨粉和硼粉混合在一起形成混合液,然后将稀土注入混合液中,进行混合成屏蔽复合溶液,纤维膜加工,将复合溶液涂覆在纤维膜的两侧,然后进行烘干。本发明通过聚氨酯树脂、石墨粉、硼粉和稀土混合形成屏蔽复合溶液涂覆在纤维膜的两侧进行烘干得到稀土屏蔽熔纺纤维膜,然后通过多巴胺改性溶液将稀土屏蔽熔纺纤维膜进行改性,则得到多巴胺改性稀土屏蔽熔纺纤维膜,让其具有良好的稳定性和延展性。(The invention relates to the technical field of hollow fiber membranes, in particular to a preparation method of a dopamine modified rare earth shielding melt-spun fiber membrane, which comprises the steps of backing up raw materials, taking 30-50 parts of rare earth, 10-20 parts of polyurethane resin, 3-5 parts of graphite powder, 1-3 parts of boron powder, 70-80 parts of dopamine modified solution and the fiber membrane, processing the raw materials, grinding the rare earth into powder, mixing the polyurethane resin, the graphite powder and the boron powder in S1 to form a mixed solution, injecting the rare earth into the mixed solution, mixing the mixed solution to form a shielding composite solution, processing the fiber membrane, coating the composite solution on two sides of the fiber membrane, and drying the shielding composite solution. According to the invention, polyurethane resin, graphite powder, boron powder and rare earth are mixed to form a shielding composite solution, the shielding composite solution is coated on two sides of a fiber membrane and dried to obtain a rare earth shielding melt-spun fiber membrane, and then the rare earth shielding melt-spun fiber membrane is modified by a dopamine modification solution to obtain the dopamine modified rare earth shielding melt-spun fiber membrane, so that the dopamine modified rare earth shielding melt-spun fiber membrane has good stability and ductility.)

1. The preparation method of the dopamine modified rare earth shielding melt-spun fiber membrane is characterized by comprising the following steps:

s1, backing up raw materials, namely taking 30-50 parts of rare earth, 10-20 parts of polyurethane resin, 3-5 parts of graphite powder, 1-3 parts of boron powder, 70-80 parts of dopamine modified solution and a fibrous membrane;

s2, processing raw materials, namely grinding rare earth into powder, mixing the polyurethane resin, graphite powder and boron powder in S1 to form a mixed solution, injecting the rare earth into the mixed solution, and mixing to form a shielding composite solution;

s3: processing a fiber membrane, namely coating the composite solution on two sides of the fiber membrane, then drying, and obtaining the rare earth shielding melt-spun fiber membrane after drying;

s4: and (3) processing for multiple times, namely soaking the rare earth shielding melt-spun fiber membrane in the S3 in a dopamine modified solution, washing with ionized water after soaking is finished, washing away unstable molecules, repeating the steps for three to five times, and air-drying the unstable molecules to obtain the dopamine modified rare earth shielding melt-spun fiber membrane.

2. The method for preparing a dopamine-modified rare earth-shielding melt-spun fibrous membrane as claimed in claim 1, wherein in the step S2, the membrane is pulverized for 10-15min by a traditional Chinese medicine pulverizer, and then the volume of the final mixed solution is 500-800 ml.

3. The preparation method of the dopamine-modified rare earth-shielding melt-spun fibrous membrane according to claim 1, wherein the thickness of the composite solution coating in the S3 is 20-30 mm, and the drying time is 30-60 min.

4. The method for preparing the dopamine-modified rare earth-shielded melt-spun fibrous membrane according to claim 1, wherein 70 to 80 parts of dopamine-modified solution in S4 is mixed with a buffer solution with the capacity of 300ml and the ph of 8.8, and the concentration of the dopamine-modified solution is 2000 mg/L.

5. The preparation method of the dopamine-modified rare earth-shielding melt-spun fiber membrane according to claim 1, wherein the air-drying time is 15-30min, and the thickness of the dopamine-modified rare earth-shielding melt-spun fiber membrane is 40-50 mm.

Technical Field

The invention relates to the technical field of hollow fiber membranes, in particular to a preparation method of a dopamine modified rare earth shielding melt-spun fiber membrane.

Background

The hollow fiber membrane is a membrane having a self-supporting function and a fibrous shape. The hollow fiber membrane is prepared by processing polysulfone and dimethylacetamide serving as raw materials into fiber filaments with hollow inner cavities, and then dividing the fiber filaments by a high-permeability polymer, and has a selective permeability characteristic.

The stability and ductility of the current hollow fiber membrane are poor, and the hollow fiber membrane needs to have good stability and certain ductility.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a preparation method of a dopamine modified rare earth shielding melt-spun fibrous membrane.

The invention provides a preparation method of a dopamine modified rare earth shielding melt-spun fiber membrane, which comprises the following steps:

s1, backing up raw materials, namely taking 30-50 parts of rare earth, 10-20 parts of polyurethane resin, 3-5 parts of graphite powder, 1-3 parts of boron powder, 70-80 parts of dopamine modified solution and a fibrous membrane;

s2, processing raw materials, namely grinding rare earth into powder, mixing the polyurethane resin, graphite powder and boron powder in S1 to form a mixed solution, injecting the rare earth into the mixed solution, and mixing to form a shielding composite solution;

s3: processing a fiber membrane, namely coating the composite solution on two sides of the fiber membrane, then drying, and obtaining the rare earth shielding melt-spun fiber membrane after drying;

s4: and (3) processing for multiple times, namely soaking the rare earth shielding melt-spun fiber membrane in the S3 in a dopamine modified solution, washing with ionized water after soaking is finished, washing away unstable molecules, repeating the steps for three to five times, and air-drying the unstable molecules to obtain the dopamine modified rare earth shielding melt-spun fiber membrane.

Preferably, in the step S2, the traditional Chinese medicine is pulverized for 10-15min by a traditional Chinese medicine pulverizer, and then the capacity of the final mixed solution is 500-800 ml.

Preferably, the coating thickness of the composite solution in S3 is 20-30 mm, and the drying time is 30-60 min.

Preferably, the dopamine modifying solution in the S4 is prepared by mixing 70-80 parts of dopamine solution with a buffer solution with the capacity of 300ml and the ph of 8.8, and the concentration of the dopamine modifying solution is 2000 mg/L.

Preferably, the air drying time is 15-30min, and the thickness of the dopamine modified rare earth shielding melt spinning fiber film is 40-50 mm.

The invention has the beneficial effects that:

the preparation method comprises the steps of mixing polyurethane resin, graphite powder, boron powder and rare earth to form a shielding composite solution, coating the shielding composite solution on two sides of a fiber membrane, drying to obtain a rare earth shielding melt-spun fiber membrane, and modifying the rare earth shielding melt-spun fiber membrane through a dopamine modification solution to obtain the dopamine modified rare earth shielding melt-spun fiber membrane, wherein the dopamine modified rare earth shielding melt-spun fiber membrane has good stability and ductility.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The preparation method of the dopamine modified rare earth shielding melt-spun fiber membrane comprises the following steps:

s1, backing up raw materials, namely taking 30-50 parts of rare earth, 10-20 parts of polyurethane resin, 3-5 parts of graphite powder, 1-3 parts of boron powder, 70-80 parts of dopamine modified solution and a fibrous membrane;

s2, processing raw materials, namely grinding rare earth into powder, mixing the polyurethane resin, graphite powder and boron powder in S1 to form a mixed solution, injecting the rare earth into the mixed solution, and mixing to form a shielding composite solution;

s3: processing a fiber membrane, namely coating the composite solution on two sides of the fiber membrane, then drying, and obtaining the rare earth shielding melt-spun fiber membrane after drying;

s4: processing for multiple times, namely soaking the rare earth shielding melt-spun fiber membrane in the S3 in a dopamine modified solution, washing with ionized water after soaking is finished, washing away unstable molecules, repeating the steps for three to five times, and air-drying the unstable molecules to obtain the dopamine modified rare earth shielding melt-spun fiber membrane;

and S2, crushing the mixture for 10-15min by using a traditional Chinese medicine crusher, mixing the final mixed solution with the capacity of 500-800ml, the coating thickness of the composite solution in S3 is 20-30 mm, the drying time is 30-60min, mixing 70-80 parts of dopamine solution and a buffer solution with the capacity of 300ml and the ph of 8.8 in S4, wherein the concentration of the dopamine solution is 2000mg/L, the air drying time is 15-30min, and the thickness of the dopamine modified rare earth shielding melt-spinning fiber film is 40-50 mm.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.