CN112721368A - Composite film with good corrosion resistance effect - Google Patents

Composite film with good corrosion resistance effect Download PDF

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Publication number
CN112721368A
CN112721368A CN202110023506.4A CN202110023506A CN112721368A CN 112721368 A CN112721368 A CN 112721368A CN 202110023506 A CN202110023506 A CN 202110023506A CN 112721368 A CN112721368 A CN 112721368A
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CN
China
Prior art keywords
layer
corrosion
resistance
good
resistant
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Pending
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CN202110023506.4A
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Chinese (zh)
Inventor
余敏
叶杰芬
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Shengchang Shanghai New Material Technology Co ltd
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Shengchang Shanghai New Material Technology Co ltd
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Priority to CN202110023506.4A priority Critical patent/CN112721368A/en
Publication of CN112721368A publication Critical patent/CN112721368A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/206—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/552—Fatigue strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/752—Corrosion inhibitor

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a composite membrane with a good corrosion resistance effect, which comprises a bottom membrane layer, wherein a microporous membrane layer is arranged on the outer side of the bottom membrane layer, a separation membrane layer is arranged on the outer side of the microporous membrane layer, a corrosion resistance layer is arranged on the outer side of the separation membrane layer, a reinforcing layer is arranged on the outer side of the corrosion resistance layer, and a release layer is arranged on the lower end surface of the bottom membrane layer. The composite film with the good corrosion resistance effect is provided with the corrosion-resistant layer, the corrosion-resistant layer is made of polyurethane, the highest heat resistance of the corrosion-resistant layer is 155 ℃, the composite film has good chemical corrosion resistance, oil resistance, wear resistance and adhesive force, the toughness and the electric insulation of the paint film are good, the composite film is high-temperature resistant and corrosion resistant when in use, the bottom film layer is arranged and made of epoxy resin, the epoxy resin contains stable benzene rings, and the composite film has good acid resistance, alkali resistance and organic solvent resistance, good chemical resistance, excellent electric insulation and good stability.

Description

Composite film with good corrosion resistance effect
Technical Field
The invention relates to the technical field of composite membranes, in particular to a composite membrane with a good corrosion resistance effect.
Background
The composite membrane material includes any possible combination of materials, such as ceramic membrane on metal oxide or aromatic polyamide membrane on polysulfone microporous membrane, and the flat membrane or the roll membrane is reinforced with non-woven fabric to support the pressure resistance of the microporous membrane, while the hollow fiber membrane is not needed.
Most of the existing composite membranes have poor corrosion resistance, and are corroded by feeding materials greatly when the composite membranes are used, and the corrosion resistance of the composite membranes is poor, so that the replacement frequency of the composite membranes is increased, and the use cost is increased.
Disclosure of Invention
The invention aims to provide a composite film with good corrosion resistance effect, and aims to solve the problems that most of the existing composite films in the background art are poor in corrosion resistance, are corroded by feeding materials greatly when the composite films are used, and are poor in corrosion resistance, so that the replacement frequency of the composite films is increased, and the use cost is increased.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a complex film that corrosion-resistant effect is good, includes the basement membrane layer, the outside of basement membrane layer is provided with the micropore rete, the outside of micropore rete is provided with the separation rete, the outside of separation rete is provided with corrosion resistant layer, corrosion resistant layer's the outside is provided with the enhancement layer, the lower terminal surface of basement membrane layer is provided with from the type layer.
Preferably, the thickness of the bottom film layer is 30-40 μm, and the bottom film layer is made of epoxy resin.
Preferably, the thickness of the microporous membrane layer is 5-35 μm, and the microporous membrane layer is made of polytetrafluoroethylene.
Preferably, the thickness of the separation membrane layer is 12-25 μm, and the separation membrane layer is made of graphene.
Preferably, the thickness of the corrosion-resistant layer is 15-25 μm, and the corrosion-resistant layer is made of polyurethane.
Preferably, the thickness of the reinforcing layer is 18-26 μm, and the reinforcing layer is made of nano silicon dioxide.
Compared with the prior art, the invention has the beneficial effects that:
1. the composite film with good corrosion resistance effect is provided with the corrosion-resistant layer, the corrosion-resistant layer is made of polyurethane, the highest heat resistance of the corrosion-resistant layer is 155 ℃, the composite film has good chemical corrosion resistance, oil resistance, wear resistance and adhesive force, and the toughness and the electrical insulation of the paint film are good, so that the composite film is resistant to high temperature and corrosion when in use;
2. this compound film that corrosion-resistant effect is good is provided with the basement membrane layer, and the basement membrane layer adopts the epoxy resin material to make, and epoxy contains stable benzene ring, has good acidproof, alkali-proof and resistant organic solvent's performance, and it is good to resist the chemical property, and electrical insulation is splendid, and stability is good, and the enhancement layer adopts the nanometer silica material to make, and the enhancement layer is nontoxic, tasteless, pollution-free, has high efficiency, lasting, high temperature resistance antibacterial property, can improve other materials ageing resistance, intensity and chemical resistance in the compound film.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
fig. 2 is a schematic perspective view of the present invention.
In the figure: 1. a base film layer; 2. a microporous membrane layer; 3. separating the membrane layer; 4. a corrosion resistant layer; 5. a reinforcing layer; 6. and a release layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a complex film that corrosion-resistant effect is good, includes bottom film layer 1, micropore rete 2, separation rete 3, corrosion resistant layer 4, enhancement layer 5 and leaves type layer 6, and bottom film layer 1's the outside is provided with micropore rete 2, and micropore rete 2's the outside is provided with separation rete 3, and separation rete 3's the outside is provided with corrosion resistant layer 4, and corrosion resistant layer 4's the outside is provided with enhancement layer 5, and bottom film layer 1's lower terminal surface is provided with from type layer 6.
Furthermore, the thickness of the bottom film layer 1 is 30-40 μm, the bottom film layer 1 is made of epoxy resin, the epoxy resin contains stable benzene rings, and has good acid resistance, alkali resistance and organic solvent resistance, good chemical resistance, excellent electrical insulation property and good stability.
Furthermore, the thickness of the microporous membrane layer 2 is 5-35 μm, the microporous membrane layer 2 is made of polytetrafluoroethylene as a raw material, a microporous membrane is formed after expansion and stretching, the membrane is coated on various fabrics and base materials by a special process to form a novel filtering material, the membrane has small pore diameter, uniform distribution and large porosity, can filter all dust particles including bacteria while keeping air circulation, achieves the purposes of purification and ventilation, and is widely applied to the fields of pharmacy, biochemistry, microelectronics and laboratory consumables.
Furthermore, the thickness of the separation film layer 3 is 12-25 μm, the separation film layer 3 is made of graphene, the separation film layer 3 is a special thin-layer substance with selective permeation function, which can permeate one or more substances in the fluid, but not permeate other substances, thereby playing roles of concentration, separation and purification, realizing separation under the condition of maintaining the environment of the original biological system, efficiently concentrating and enriching the product, effectively removing impurities, and having convenient operation, compact structure, low energy consumption, simplified process, no secondary pollution, no need of adding chemical substances and high separation efficiency of the composite film.
Furthermore, the thickness of the corrosion-resistant layer 4 is 15-25 μm, the corrosion-resistant layer 4 is made of polyurethane, the highest heat resistance of the corrosion-resistant layer 4 is 155 ℃, the corrosion-resistant layer has good chemical corrosion resistance, oil resistance, wear resistance and adhesive force, and the paint film has good toughness and electrical insulation, so that the composite film is resistant to high temperature and corrosion when in use.
Furthermore, the thickness of the reinforcing layer 5 is 18-26 μm, the reinforcing layer 5 is made of nano silicon dioxide, and the reinforcing layer 5 is non-toxic, tasteless and pollution-free, has high-efficiency, durable and high-temperature-resistant antibacterial performance, and can improve the ageing resistance, strength and chemical resistance of other materials in the composite film.
The working principle is as follows: the composite membrane is a microporous membrane layer 2 as a support layer, a separation membrane layer 3 formed by covering a dense homogeneous membrane on the surface of the microporous membrane layer 2 as a barrier layer is used for greatly increasing the material permeability, the microporous membrane layer 2 is made of polytetrafluoroethylene by taking polytetrafluoroethylene as a raw material, a microporous membrane is formed by expansion and stretching, the membrane is covered on various fabrics and base materials by a special process to form a novel filter material, the membrane has small pore diameter, uniform distribution and high porosity, can filter all dust particles including bacteria while keeping air circulation, achieves the purposes of purification and ventilation, is widely applied to the fields of pharmacy, biochemistry, microelectronics and laboratory consumables, the separation membrane layer 3 is made of graphene, and the separation membrane layer 3 is a special thin-layer material with a selective transmission function, it can make one or several substances in the fluid permeate through, but other substances do not permeate through, thus play a role in concentration and separation purification, can realize the separation under the condition of maintaining the original biological system environment, and can concentrate, enrich the products high-efficiently, remove the impurity effectively, and easy to operate in addition, compact in construction, with low consumption, the process is simplified, there is no secondary pollution, and does not need to add the chemical article, make the compound membrane separation efficiency high, the bottom membranous layer 1 is equipped with the bottom membranous layer 2 bottom end, the bottom membranous layer 1 is made of epoxy resin material, the epoxy resin contains the stable benzene ring, have good acid, alkali and organic solvent resistance, the chemical resistance is good, the electric insulating property is excellent, the stability is good, there is corrosion resistant layer 4 outside the separation membranous layer 3, the corrosion resistant layer 4 is made of polyurethane material, the highest heat resistance of the corrosion resistant layer 4 is 155 ℃, there are good chemical corrosion resistance, oil resistance, wearability and adhesive force, paint film toughness and electrical insulation are all better, make the complex film high temperature resistant corrosion-resistant when using, the outside of corrosion resistant layer 4 is provided with enhancement layer 5, enhancement layer 5 adopts the nanometer silica material to make, enhancement layer 5 is nontoxic, tasteless, pollution-free, it is high-efficient, lasting, high temperature resistance antibacterial property, can improve other materials ageing resistance in the complex film, intensity and chemical resistance, the lower terminal surface of basement membrane layer 1 is provided with from type layer 6, from type layer 6 adopts and adopts the PET material to make, from type layer 6 and basement membrane layer 1 can adopt and can leave the type combination, also can adopt and can not leave the type combination, mainly used provides the effective protection of complex film in transportation, in the storage process, tear off type layer 6 when using.
Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims (6)

1. The utility model provides a complex film that corrosion-resistant effect is good, includes basement membrane layer (1), its characterized in that: the outside of basement membrane layer (1) is provided with micropore rete (2), the outside of micropore rete (2) is provided with separation rete (3), the outside of separation rete (3) is provided with corrosion resistant layer (4), the outside of corrosion resistant layer (4) is provided with enhancement layer (5), the lower terminal surface of basement membrane layer (1) is provided with from type layer (6).
2. The composite film with good corrosion resistance according to claim 1, wherein: the thickness of the bottom film layer (1) is 30-40 mu m, and the bottom film layer (1) is made of epoxy resin.
3. The composite film with good corrosion resistance according to claim 1, wherein: the thickness of the microporous membrane layer (2) is 5-35 mu m, and the microporous membrane layer (2) is made of polytetrafluoroethylene.
4. The composite film with good corrosion resistance according to claim 1, wherein: the thickness of the separation film layer (3) is 12-25 mu m, and the separation film layer (3) is made of graphene.
5. The composite film with good corrosion resistance according to claim 1, wherein: the thickness of the corrosion-resistant layer (4) is 15-25 mu m, and the corrosion-resistant layer (4) is made of polyurethane.
6. The composite film with good corrosion resistance according to claim 1, wherein: the thickness of the reinforcing layer (5) is 18-26 microns, and the reinforcing layer (5) is made of nano silicon dioxide.
CN202110023506.4A 2021-01-08 2021-01-08 Composite film with good corrosion resistance effect Pending CN112721368A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207274064U (en) * 2017-10-18 2018-04-27 重庆市金维佳塑料有限公司 A kind of polyvinyl chloride compound modified salt film
CN208096238U (en) * 2018-04-25 2018-11-16 李美春 A kind of architectural engineering Intelligent bracelet
CN108926057A (en) * 2018-08-29 2018-12-04 泰州市峦之湄服装机械有限公司 A kind of military project cloth of good toughness
CN208216212U (en) * 2018-03-10 2018-12-11 浙江申南塑胶有限公司 A kind of valve PTFE film of high abrasion
CN210733483U (en) * 2019-06-04 2020-06-12 东莞市优越净化科技有限公司 High-strength galvanized inner strip
CN210881205U (en) * 2019-10-31 2020-06-30 闽南师范大学 Graphene oxide composite film
CN212091272U (en) * 2020-04-14 2020-12-08 苏州辉龙净化过滤有限公司 Composite filter cloth convenient to wash

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207274064U (en) * 2017-10-18 2018-04-27 重庆市金维佳塑料有限公司 A kind of polyvinyl chloride compound modified salt film
CN208216212U (en) * 2018-03-10 2018-12-11 浙江申南塑胶有限公司 A kind of valve PTFE film of high abrasion
CN208096238U (en) * 2018-04-25 2018-11-16 李美春 A kind of architectural engineering Intelligent bracelet
CN108926057A (en) * 2018-08-29 2018-12-04 泰州市峦之湄服装机械有限公司 A kind of military project cloth of good toughness
CN210733483U (en) * 2019-06-04 2020-06-12 东莞市优越净化科技有限公司 High-strength galvanized inner strip
CN210881205U (en) * 2019-10-31 2020-06-30 闽南师范大学 Graphene oxide composite film
CN212091272U (en) * 2020-04-14 2020-12-08 苏州辉龙净化过滤有限公司 Composite filter cloth convenient to wash

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