阅读说明：本技术 一种增强型聚乙烯中空纤维膜及其制备方法 (A kind of enhanced polyethylene hollow fiber membrane and preparation method thereof ) 是由 傅寅翼 吴低潮 王鑫臻 黄江益 于 2018-05-25 设计创作，主要内容包括：本发明公开了一种增强型聚乙烯中空纤维膜,由以下质量比的成膜体系组成：聚乙烯20～45％；氧化石墨烯1～5％；复合偶联剂0.02～0.5％；亲水剂1～25％；稀释剂30～70％；成孔剂2～20％。本发明还公开了一种增强型聚乙烯中空纤维膜的制备方法,包括将各原料高速混合制备成膜料,然后将成膜料经分切机切成7～50毫米的窄条,然后将窄条送入缠绕设备,缠绕在有机纤维管上,得中空纤维管,再将中空纤维管经气相或液相分离除去稀释剂和成孔剂,再经低温烧结得增强型聚乙烯中空纤维膜。(The invention discloses a kind of enhanced polyethylene hollow fiber membranes, are made of the film forming system of following mass ratio: polyethylene 20~45%；Graphene oxide 1~5%；Composite coupler 0.02~0.5%；Hydrophilic agent 1~25%；Diluent 30~70%；Pore former 2~20%.The invention also discloses a kind of preparation methods of enhanced polyethylene hollow fiber membrane, including each raw material mixed at high speed is prepared film forming material, then film forming material is cut into 7~50 millimeters of fillet through cutting machine, then fillet is sent into Wiring apparatus, it is wrapped on organic fiber pipe, hollow fiber conduit is obtained, then hollow fiber conduit is removed into diluent and pore former through gas phase or liquid phase separation, then obtain enhanced polyethylene hollow fiber membrane through low-temperature sintering.)

1. a kind of enhanced polyethylene hollow fiber membrane, which is characterized in that be made of the film forming system of following mass ratio:

2. a kind of enhanced polyethylene hollow fiber membrane according to claim 1, which is characterized in that the composite coupler It is mixed by the silane coupling agent and titanate coupling agent of equal mass ratioes.

3. a kind of enhanced polyethylene hollow fiber membrane according to claim 1, which is characterized in that the hydrophilic agent is poly- Vinylpyrrolidone or polyethylene glycol.

4. a kind of enhanced polyethylene hollow fiber membrane according to claim 1, which is characterized in that the diluent is neighbour One of dibatyl phithalate, dioctyl phthalate, paraxylene, tributyl phosphate, tetrahydrofuran are a variety of Combination.

5. a kind of enhanced polyethylene hollow fiber membrane according to claim 1, which is characterized in that the pore former is chlorine Change sodium or lithium chloride or calcium chloride or calcium carbonate.

6. a kind of preparation method of enhanced polyethylene hollow fiber membrane, which is characterized in that comprise the following specific steps that:

1) by polyethylene and graphene oxide, iron powder, composite coupler mixed at high speed；

2) hydrophilic agent, pore former, diluent are sequentially added in the ingredient after Xiang Shangshu mixed at high speed, is uniformly mixed and film is made Material；

3) above-mentioned film forming material is put into the fillet that cutting machine is cut into 7~50 millimeters, fillet is then sent into Wiring apparatus, be wrapped in On organic fiber pipe, hollow fiber conduit is obtained；

4) it is passed through compressed air or higher boiling non-solvent into hollow fiber conduit as core liquid, hollow fiber conduit is then sent into gas Mutually or in liquid phase separation slot, diluent, the pore former in film material are separated, PE hollow fiber film thread is obtained；

5) PE hollow fiber film thread is sent into drying tunnel and is sintered 10~60 seconds in 100~130 DEG C to get enhancing polyethylene hollow fiber Film.

7. a kind of preparation method of enhanced polyethylene hollow fiber membrane according to claim 6, which is characterized in that described Winding layer number in step 3) is no more than 10 layers.

8. a kind of preparation method of enhanced polyethylene hollow fiber membrane according to claim 6, which is characterized in that described Organic fiber shell material in step 3) is aramid fiber, terylene, polyester, polyether-ether-ketone, PSA fiber, poly- paraphenylene terephthalamide to benzene two Amine, Visil fiber, polybenzimidazoles, polyphenylene sulfide or polyimides, 1-5.5 millimeters of sleeve outer, 0.5-4.5 millimeters of internal diameter.

Technical field

The present invention relates to technical field of composite materials, more specifically, it relates to a kind of enhanced polyethylene hollow fiber Film and preparation method thereof.

Background technique

In terms of water prevention and cure of pollution and the recycling and reusing of water resource, compared with tradition AO method, membrane bioreactor (MBR) be a kind of efficient water resource reuse and sewage treatment method.Core original part in membrane bioreactor is at sewage Reason filter membrane mainly includes curtain type membrane, plate membrane, tubular membrane, rolled film etc..Wherein curtain type membrane mainly uses doughnut Filter membrane is as filtering material.

For polyethylene as a kind of general-purpose plastics, yield is big and cheap, be the plastics that are most widely used at present it One.If its surcharge can not only can be greatly improved polythene material functionalization, but also its application neck can also be expanded Domain.Polyethylene hollow fiber microporous barrier is exactly this kind of material, has just been rapidly developed since 1970s come out, Application field is also constantly expanding, and is applied widely in industries such as water process, biomedicine, pharmacy, chemical industry and food.

Existing polyethylene hollow fiber microporous barrier mechanical strength is inadequate, and tensile resistance is poor, has seriously affected polyethylene The use of hollow-fibre membrane.

Summary of the invention

The object of the present invention is to provide a kind of high mechanical strength, the good enhanced polyethylene hollow fiber of tensile resistance Film improves the utilization rate of the film.

To achieve the above object, realized by following technological means: a kind of enhanced polyethylene hollow fiber membrane, by with The film forming system of lower mass ratio forms:

It advanced optimizes are as follows: the composite coupler is mixed by the silane coupling agent and titanate coupling agent of equal mass ratioes It forms.

It advanced optimizes are as follows: the hydrophilic agent is polyvinylpyrrolidone or polyethylene glycol.

Advanced optimize are as follows: the diluent be dibutyl phthalate, dioctyl phthalate, paraxylene, One of tributyl phosphate, tetrahydrofuran or a variety of combinations.

It advanced optimizes are as follows: the pore former is sodium chloride or lithium chloride or calcium chloride or calcium carbonate.

It is a further object of the present invention to provide a kind of preparation method of enhanced polyethylene hollow fiber membrane, including it is as follows Specific steps:

1) by polyethylene and graphene oxide, iron powder, composite coupler mixed at high speed；

2) hydrophilic agent, pore former, diluent are sequentially added in the ingredient after Xiang Shangshu mixed at high speed, is uniformly mixed system Film forming material；

3) above-mentioned film forming material is put into the fillet that cutting machine is cut into 7~50 millimeters, fillet is then sent into Wiring apparatus, It is wrapped on organic fiber pipe, obtains hollow fiber conduit；

4) compressed air or higher boiling non-solvent are passed through into hollow fiber conduit as core liquid, then by hollow fiber conduit It is sent into gas phase or liquid phase separation slot, diluent, the pore former in film material is separated, PE hollow fiber film thread is obtained；

5) PE hollow fiber film thread is sent into drying tunnel and is sintered 10~60 seconds in 100~130 DEG C to get in enhancing polyethylene Empty fiber membrane.

It advanced optimizes are as follows: the winding layer number in the step 3) is no more than 10 layers.

It advanced optimizes are as follows: the organic fiber shell material in the step 3) is aramid fiber, polyether-ether-ketone, PSA fiber, gathers Poly P phenylene diamine terephthalamide, Visil fiber, polybenzimidazoles, polyphenylene sulfide or polyimides, sleeve outer 1-5.5 milli Rice, 0.5-4.5 millimeters of internal diameter.

Compared with prior art, the invention has the benefit that graphene oxide composite coupler and iron powder catalysis Under effect, branch occurs with matrix polythene material and connects, so that polyethylene fibre is linked to be net by graphene oxide branch, it is netted Structure increases the mechanical strength of polyethylene film, and gained film layer is not easily damaged, and resistance to physical damage ability is significantly increased；Poly- second Alkene is cheap, and graphene oxide is cheap and easy to get, prepares enhanced polyethylene hollow fiber membrane institute through graphene oxide enhancing It is at low cost to obtain film, it is cheap and easy to get.PE will form lamellar structure in fiber under stress field action during melt spinning, warp Up to PE hard elastic fibre after heat treatment, (spinning is led with spinning drawing ratio for the crystallinity and elastic recovery rate of PE hard elastic fibre Stretch ratio=winding rate/rate of extrusion) increase and increase, orientation and row of the high spinning drawing than being conducive to PE strand Column, promote platelet arranged in parallel to be formed, and the present invention uses the hollow fibre of enhanced polyethylene of high-temperature fusion high-speed stretch preparation The elastic recovery rate for tieing up film is high, and tensile resistance is strong, not fracture of wire.It please be described in detail and polyethylene hollow fiber membrane is prepared using winding method The advantages of, it preferably writes out to mechanical strength, the raising principle of tensile property.

Specific embodiment

Invention is described in further detail below by specific embodiment, it is not to limit that following embodiment, which is descriptive, Protection scope of the present invention of property.