CN113045999A - 一种新型半透膜支撑体的制备方法 - Google Patents
一种新型半透膜支撑体的制备方法 Download PDFInfo
- Publication number
- CN113045999A CN113045999A CN202110031441.8A CN202110031441A CN113045999A CN 113045999 A CN113045999 A CN 113045999A CN 202110031441 A CN202110031441 A CN 202110031441A CN 113045999 A CN113045999 A CN 113045999A
- Authority
- CN
- China
- Prior art keywords
- fiber
- woven fabric
- wet
- slurry
- semipermeable membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 93
- 238000000034 method Methods 0.000 claims abstract description 61
- 230000001070 adhesive effect Effects 0.000 claims abstract description 29
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims description 114
- 239000002002 slurry Substances 0.000 claims description 58
- 239000000853 adhesive Substances 0.000 claims description 27
- 230000035699 permeability Effects 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 15
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 14
- 238000005187 foaming Methods 0.000 claims description 14
- 238000007731 hot pressing Methods 0.000 claims description 10
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 7
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 7
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 7
- 239000004952 Polyamide Substances 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 239000004088 foaming agent Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000004537 pulping Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 5
- 229920000728 polyester Polymers 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- QYMGIIIPAFAFRX-UHFFFAOYSA-N butyl prop-2-enoate;ethene Chemical compound C=C.CCCCOC(=O)C=C QYMGIIIPAFAFRX-UHFFFAOYSA-N 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 229920006245 ethylene-butyl acrylate Polymers 0.000 claims description 3
- 229920006225 ethylene-methyl acrylate Polymers 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 3
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 229920001897 terpolymer Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000000643 oven drying Methods 0.000 claims 1
- 239000012790 adhesive layer Substances 0.000 abstract description 19
- 239000011148 porous material Substances 0.000 abstract description 16
- 239000010410 layer Substances 0.000 abstract description 13
- 230000007547 defect Effects 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004873 anchoring Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000006260 foam Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 10
- 239000011247 coating layer Substances 0.000 description 9
- 239000012466 permeate Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/10—Supported membranes; Membrane supports
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/18—Drying webs by hot air
- D21F5/181—Drying webs by hot air on Yankee cylinder
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/12—Organic non-cellulose fibres from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/18—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylonitriles
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/24—Polyesters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/26—Polyamides; Polyimides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/30—Polyamides; Polyimides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
- D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/08—Filter paper
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/20—Presence of organic materials
- C09J2400/26—Presence of textile or fabric
- C09J2400/263—Presence of textile or fabric in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2477/00—Presence of polyamide
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Paper (AREA)
Abstract
本发明公开了一种新型半透膜支撑体的制备方法,其结构由下而上分别为纺粘无纺布、湿法无纺布层、复合在湿法无纺布中的胶粘层,最上面的离型膜层。本新型支撑体通过在湿法无纺布上浸润并发泡形成的胶粘层,可以在涂布半透膜时和半透膜表面形成粘结,在原有锚定效应的基础上增加了胶粘作用,明显提高了半透膜和支撑体之间的剥离强度,直接避免了因支撑体和半透膜局部无结合力产生的半透膜缺陷。胶粘层可以填补湿法无纺布中较大孔隙,使得孔隙更加均匀,提高支撑体的表面平滑度,从而避免了因为湿法无纺布的低密度缺陷而导致的半透膜渗透。本支撑体在湿法无纺布下方复合了纺粘无纺布,提高了抗拉强度,弥补了因湿法无纺布孔隙增大而降低强度的不足。
Description
技术领域
本发明属于半透膜支撑体领域,特别涉及一种新型半透膜支撑体的制备方法。
背景技术
在饮料/工业用水中杂质的去除、海水的淡化、食品中杂菌的去除、排水处理或者生物化学领域中,半透膜已经被广泛使用。
为了得到高的过滤流速和过滤性能,要求半透面表面凹凸少,不产生半透膜形成时的横向弯曲或皱褶,需要在支撑体上以均匀的厚度设置半透膜。因此要求支撑体表面有较高的平滑度和较低的透气度。半透膜溶液通过渗入支撑体,在支撑体内形成描定效应产生粘结,因此为了得到足够偶高的剥离强度,需要半透膜溶液渗透到支撑体内部一定深度,这就要支撑体又较低的表面平滑度和较高的透气度。半透膜溶液如果渗透到支撑体的背面会影响支撑体背面和胶水的粘结,因此又要求半透膜溶液不能出现局部渗透的情形,因此这就要求支撑体整体匀度较好,每一个纤维局部的透气度,平滑度都在合理的范围内。这就对支撑体提出了较高的要求。
目前国产的支撑体基本上都会出现局部平滑度过高导致半透膜溶液无法渗入支撑体而形成局部缺陷—亮斑,或者因为局部存在低密度缺陷而产生了半透膜溶液渗透的现象。而这两种情况本身是矛盾的,提高整体的平滑度会明显的降低局部渗透的可能性,但是又会快速提高亮斑出现的可能性。
发明内容
为了解决上述技术问题,本发明提供了一种新型半透膜支撑体的制备方法,其胶粘层可填补湿法无纺布中较大孔隙,使得孔隙更加均匀,提高支撑体的表面平滑度,从而避免了因为湿法无纺布的低密度缺陷而导致的半透膜渗透,同时还能够提高抗拉强度,弥补了因湿法无纺布孔隙增大而降低强度的不足。
本发明的技术方案是这样实现的:
一种新型半透膜支撑体的制备方法,包括以下步骤:
1)制浆:将主体纤维、粘结纤维加入到纤维分散机中,并加水至浆料质量浓度为0.2%-0.5%,开启搅拌,得到纤维浆料;
2)上网成型:将纤维浆料用专用的化纤泵输送至高位稳浆箱内,经过多次冲浆和筛选工序将纤维浆料调至质量浓度为0.02%-0.05%,流送至中心布浆器及斜网满流式流浆箱,纤维浆料经斜网流浆箱送至成型网,以纺粘无纺布为成型网,在纺粘无纺布上经脱水成型,制得湿纤维网;
3)湿纤维网采用杨克缸烘干,湿法无纺布面为贴缸面,杨克缸的温度为120℃,贴缸时间不低于40s;
4)预热:预热温度设置在粘结纤维熔点以下5-15℃。
5)热压:采用两组钢辊对压的方式,上钢辊温度高于主体纤维热变形温度10-30℃,下钢辊温度高于主体纤维温度10-20℃,线速度在5-20m/min,线压力在80-120kN/m;
6)制备发泡胶粘剂,胶粘剂的成分为100-200质量份共聚物、1-3质量份发泡剂、甲苯溶剂,通过增加甲苯溶剂调整粘度为500-1500cps;
7)在湿法无纺布表面涂敷步骤6)的发泡胶粘剂,进行渗透,并在烘箱中100℃进行烘干处理。
进一步的,主体纤维的纤维长度为3-6mm,直径为6-10μm;粘结纤维长度为3-6mm,直径为9-15μm;主体纤维和粘结纤维的质量比在5:5-7:3之间。
进一步的,主体纤维为聚丙烯、聚丙烯酸酯、聚氨酯、聚酯、聚酰胺、聚酰亚胺、聚丙烯腈短切纤维中的一种或多种;粘结纤维为单组分纤维或者双组份纤维,双组份纤维为皮芯型、并列型、海岛型、桔瓣型复合纤维中的一种或多种。
进一步的,纺粘无纺布的厚度为20-50μm,克重为15-35g/m2,透气度为1.4-2.0cm3/cm2/s。
进一步的,共聚物为乙烯乙酸乙烯酯、乙烯丙烯酸甲酯共聚物、乙烯丙烯酸丁酯共聚物、聚酰胺聚合物、乙烯三元共聚物中的一种或者组合。
进一步的,烘箱烘干后胶粘剂渗透至湿法无纺布厚度的60%-80%。
进一步的,热压后,湿法无纺布层的厚度在60-80μm,表面平滑度在25-30s,透气度为3.0-6.0cm3/cm2/s,表面平滑度为25-30s。
本发明提供了一种新型半透膜支撑体的制备方法,其结构在厚度方向上分为4层,由下而上分别为纺粘无纺布、湿法无纺布层、复合在湿法无纺布中的胶粘层,最上面的离型膜层。本新型支撑体通过在湿法无纺布上浸润并发泡形成的胶粘层,可以在涂布半透膜时和半透膜表面形成粘结,在原有锚定效应的基础上增加了胶粘作用,明显提高了半透膜和支撑体之间的剥离强度,直接避免了因支撑体和半透膜局部无结合力产生的半透膜缺陷。胶粘层可以填补湿法无纺布中较大孔隙,使得孔隙更加均匀,提高支撑体的表面平滑度,从而避免了因为湿法无纺布的低密度缺陷而导致的半透膜渗透。本支撑体在湿法无纺布下方复合了纺粘无纺布,提高了抗拉强度,弥补了因湿法无纺布孔隙增大而降低强度的不足。
具体实施方式
为了更好的理解本发明的实质,下述给出了本发明的实施方式,仅用于说明本发明是如何实施的,并非限制本发明仅可由以下方案实施,在理解本发明技术方案的基础上,对本发明进行的变更、替换、结构修饰依旧属于本发明的保护范围,本发明的保护范围涵盖于其权利要求及其同变换。
本发明公开了一种新型半透膜支撑体的制备方法,其特征在于,包括以下步骤:
1)制浆:将主体纤维、粘结纤维加入到纤维分散机中,并加水至浆料质量浓度为0.2%-0.5%,开启搅拌,得到纤维浆料;
2)上网成型:将纤维浆料用专用的化纤泵输送至高位稳浆箱内,经过多次冲浆和筛选工序将纤维浆料调至质量浓度为0.02%-0.05%,流送至中心布浆器及斜网满流式流浆箱,纤维浆料经斜网流浆箱送至成型网,以纺粘无纺布为成型网,在纺粘无纺布上经脱水成型,制得湿纤维网;
3)湿纤维网采用杨克缸烘干,湿法无纺布面为贴缸面,杨克缸的温度为120℃,贴缸时间不低于40s;
4)预热:预热温度设置在粘结纤维熔点以下5-15℃。
5)热压:采用两组钢辊对压的方式,上钢辊温度高于主体纤维热变形温度10-30℃,下钢辊温度高于主体纤维温度10-20℃,线速度在5-20m/min,线压力在80-120kN/m;
6)制备发泡胶粘剂,胶粘剂的成分为100-200质量份共聚物、1-3质量份发泡剂、甲苯溶剂,通过增加甲苯溶剂调整粘度为500-1500cps;
7)在湿法无纺布表面涂敷步骤6)的发泡胶粘剂,进行渗透,并在烘箱中100℃进行烘干处理。
上述制备得到的半透膜支撑体在厚度方向上分为4层,由下而上分别为纺粘无纺布、湿法无纺布层、胶粘层,通过在湿法无纺布上浸润并发泡形成的胶粘层,可提高了半透膜和支撑体之间的剥离强度,直接避免了因支撑体和半透膜局部无结合力产生的半透膜缺陷。另外通过在湿法无纺布上涂覆发泡胶粘剂获得的胶粘层可填补湿法无纺布中较大孔隙,使得孔隙更加均匀,从而避免了因为湿法无纺布的低密度缺陷而导致的半透膜渗透的问题。
需要说明的是,以纺粘无纺布为成型网,在纺粘无纺布上形成湿法无纺布,解决了传统湿法无纺布在热压前因无强度容易断纸的问题,并且在本发明中起到了增强湿法无纺布和纺粘无纺布间的结合强度。
进一步的,主体纤维的纤维长度为3-6mm,直径为6-10μm;粘结纤维长度为3-6mm,直径为9-15μm;主体纤维和粘结纤维的质量比在5:5-7:3之间。
进一步的,主体纤维为聚丙烯、聚丙烯酸酯、聚氨酯、聚酯、聚酰胺、聚酰亚胺、聚丙烯腈短切纤维中的一种或多种;粘结纤维为单组分纤维或者双组份纤维,双组份纤维为皮芯型、并列型、海岛型、桔瓣型复合纤维中的一种或多种。
需要说明的是,热压后,湿法无纺布层的厚度在60-80μm,表面平滑度在25-30s,透气度为3.0-6.0cm3/cm2/s,表面平滑度为25-30s。
进一步的,纺粘无纺布的厚度为20-50μm,克重为15-35g/m2,透气度为1.4-2.0cm3/cm2/s。
进一步的,胶粘层浸入湿法无纺布厚度的60%-80%,胶粘层和湿法无纺布形成涂敷层,涂敷层的透气度为1.4-2.0cm3/cm2/s,平均孔径为10-20μm。
进一步的,共聚物为乙烯乙酸乙烯酯、乙烯丙烯酸甲酯共聚物、乙烯丙烯酸丁酯共聚物、聚酰胺聚合物、乙烯三元共聚物中的一种或者组合。
需要说明的是,胶粘剂在无纺布表面渗透时的粘度在500-1500cps,烘箱烘干后发现胶粘剂恰好渗透至湿法无纺布厚度的60%-80%。
为了进一步说明本发明的技术方案,结合以下实施例具体说明。
主体合成纤维,帝人人株式会社,TA04N,7.3D,长度为5mm;粘合纤维,帝人人株式会社,TA07N,10D,长度为5mm。
实施例1
1)制浆:将主体纤维TA04N(直径7.3μm,长5mm,热变形温度190℃)、粘结纤维TR07N(直径10μm,长5mm,熔点180℃)以5:5的质量比加入到纤维分散机中,并加水至浆料质量浓度为0.2%,开启搅拌,得到纤维浆料;
2)上网成型:将纤维浆料用专用的化纤泵输送至高位稳浆箱内,经过冲浆和筛选工序将纤维浆料调至质量浓度为0.02%,流送至中心布浆器及斜网满流式流浆箱,纤维浆料经斜网流浆箱送至成型网,以市售纺粘无纺布为成型网,在纺粘无纺布上经脱水成型,制得湿纤维网;
市售纺粘无纺布的参数为:厚度20μm,克重为15g/m2,透气度为1.4cm3/cm2/s;
3)湿纤维网采用杨克缸烘干,湿法无纺布面为贴缸面,杨克缸的温度为120℃,贴缸时间不低于40s;
4)预热:预热温度为170℃;
5)热压:采用两组钢辊对压的方式,上钢辊温度为210℃,下钢辊温度为200℃,线速度在5m/min,线压力在80kN/m;
6)制备发泡胶粘剂,胶粘剂主要成分是100质量份乙烯乙酸乙烯酯、1质量份ADC发泡剂、甲苯溶剂,通过增加甲苯溶剂调整粘度在500cps;
7)在湿法无纺布表面进行涂敷步骤6)的发泡胶粘剂,进行渗透,胶粘层浸入湿法无纺布厚度的60%,胶粘层和湿法无纺布形成涂敷层,并在烘箱中100℃进行烘干处理。
获得的半透膜支撑体参数为:
支撑体的厚度在90μm,克重在60/m2;
纺粘无纺布的厚度在20μm,克重在15g/m2,透气度在1.4cm3/cm2/s,纺粘无纺布的原料为聚丙烯制成的切片;
湿法无纺布的厚度在60μm,克重在20g/m2,湿法无纺布的透气度在3.0cm3/cm2/s,表面平滑度在25s;
涂敷层的透气度为1.4cm3/cm2/s,平均孔径为10μm。
实施例2
1)制浆:将主体纤维TA04N(直径7.3μm,长5mm,热变形温度190℃)、粘结纤维TR07N(直径10μm,长5mm,熔点180℃)以7:3的质量比加入到纤维分散机中,并加水至浆料质量浓度为0.5%,开启搅拌,得到纤维浆料;
2)上网成型:将纤维浆料用专用的化纤泵输送至高位稳浆箱内,经过冲浆和筛选工序将纤维浆料调至质量浓度为0.05%,流送至中心布浆器及斜网满流式流浆箱,纤维浆料经斜网流浆箱送至成型网,以市售纺粘无纺布为成型网,在纺粘无纺布上经脱水成型,制得湿纤维网;
市售纺粘无纺布的参数为:厚度50μm,克重在35g/m2,透气度在2cm3/cm2/s;
3)湿纤维网采用杨克缸烘干,湿法无纺布面为贴缸面,杨克缸的温度为120℃,贴缸时间不低于40s;
4)预热:预热温度为170℃;
5)热压:采用两组钢辊对压的方式,上钢辊温度为210℃,下钢辊温度高于主体纤维温度200℃,线速度在20m/min,线压力在120kN/m;
6)制备发泡胶粘剂,胶粘剂主要成分是200质量份乙烯乙酸乙烯酯、3质量份ADC发泡剂、甲苯溶剂,通过增加甲苯溶剂调整粘度在1500cps;
7)在湿法无纺布表面进行涂敷步骤6)的发泡胶粘剂,进行渗透,胶粘层浸入湿法无纺布厚度的80%,胶粘层和湿法无纺布形成涂敷层,并在烘箱中100℃进行烘干处理。
获得的半透膜支撑体参数为:
支撑体的厚度在110μm,克重在100/m2;
纺粘无纺布的厚度在50μm,克重在35g/m2,透气度在2cm3/cm2/s,纺粘无纺布的原料为聚氨酯制成的切片;
湿法无纺布的厚度在80μm,克重在50g/m2,湿法无纺布的透气度在6.0cm3/cm2/s,表面平滑度在30s;
涂敷层的透气度为2.0cm3/cm2/s,平均孔径为20μm。
实施例3
1)制浆:将主体纤维TA04N(直径7.3μm,长5mm,热变形温度190℃)、粘结纤维TR07N(直径10μm,长5mm,熔点180℃)以6:4的质量比加入到纤维分散机中,并加水至浆料质量浓度为0.2%,开启搅拌,得到纤维浆料;
2)上网成型:将纤维浆料用专用的化纤泵输送至高位稳浆箱内,经过冲浆和筛选工序将纤维浆料调至质量浓度为0.02%,流送至中心布浆器及斜网满流式流浆箱,纤维浆料经斜网流浆箱送至成型网,以市售纺粘无纺布为成型网,在纺粘无纺布上经脱水成型,制得湿纤维网;
市售纺粘无纺布的参数为:厚度40μm,克重在35g/m2,透气度在1.5cm3/cm2/s;
3)湿纤维网采用杨克缸烘干,湿法无纺布面为贴缸面,杨克缸的温度为120℃,贴缸时间不低于40s;
4)预热:预热温度为170℃;
5)热压:采用两组钢辊对压的方式,上钢辊温度为210℃,下钢辊温度高于主体纤维温度200℃,线速度在20m/min,线压力在100kN/m;
6)制备发泡胶粘剂,胶粘剂主要成分是100质量份乙烯乙酸乙烯酯、2质量份ADC发泡剂、甲苯溶剂,通过增加甲苯溶剂调整粘度在700cps;
7)在湿法无纺布表面进行涂敷步骤6)的发泡胶粘剂,进行渗透,胶粘层浸入湿法无纺布厚度的70%,胶粘层和湿法无纺布形成涂敷层,并在烘箱中100℃进行烘干处理。
获得的半透膜支撑体参数为:
支撑体的厚度在100μm,克重在80/m2;
纺粘无纺布的厚度在40μm,克重在35g/m2,透气度在1.5cm3/cm2/s,纺粘无纺布的原料为聚酯制成的切片;
湿法无纺布的厚度在60μm,克重在35g/m2,湿法无纺布的透气度在5.0cm3/cm2/s,表面平滑度在25.3s;
涂敷层的透气度为1.8cm3/cm2/s,平均孔径为15μm。
对比例1
以实施例3为例,其区别在于:
6)制备胶粘剂,胶粘剂主要成分是100质量份乙烯乙酸乙烯酯、甲苯溶剂,通过增加甲苯溶剂调整粘度在700cps;
7)在湿法无纺布表面进行涂敷步骤6)的胶粘剂,进行渗透,并在烘箱中100℃进行烘干处理。
获得的半透膜支撑体参数为:
支撑体的厚度在100μm,克重在82g/m2;
纺粘无纺布的厚度在40μm,克重在35g/m2,透气度在1.5cm3/cm2/s,纺粘无纺布的原料为聚酯制成的切片;
湿法无纺布的厚度在60μm,克重在35g/m2,湿法无纺布的透气度在5.0cm3/cm2/s,表面平滑度在25.3s;
胶粘层浸入湿法无纺布厚度的75%,胶粘层和湿法无纺布形成涂敷层,涂敷层的透气度为0.2cm3/cm2/s,平均孔径为2μm。
在实施例1-3及对比例1制备得到的半透膜支撑体上涂覆200μm的膜(聚砜和DMF混合溶液,聚砜的质量浓度为20%,烘干),获得半透膜,并进行剥离强度(膜体与半透膜支撑体之间的剥离强度)及横向抗拉强度(半透膜)的测试,结果见表1。
表1试验结果
从表1数据可知,相比于对比例1而言,本申请的半透膜支撑体与膜体之间的剥离强度更大。
综上所述,以上实施例仅用以说明本发明的技术方案而非限制,尽管通过参照本发明的某些优选实施例已经对本发明进行了描述,但本领域的普通技术人员应当理解,可以在形式上和细节上对其做出各种各样的改变,而不偏离所附权利要求书所限定的本发明精神和范围。
Claims (7)
1.一种新型半透膜支撑体的制备方法,其特征在于,包括以下步骤:
1)制浆:将主体纤维、粘结纤维加入到纤维分散机中,并加水至浆料质量浓度为0.2%-0.5%,开启搅拌,得到纤维浆料;
2)上网成型:将纤维浆料用专用的化纤泵输送至高位稳浆箱内,经过多次冲浆和筛选工序将纤维浆料调至质量浓度为0.02%-0.05%,流送至中心布浆器及斜网满流式流浆箱,纤维浆料经斜网流浆箱送至成型网,以纺粘无纺布为成型网,在纺粘无纺布上经脱水成型,制得湿纤维网;
3)湿纤维网采用杨克缸烘干,湿法无纺布面为贴缸面,杨克缸的温度为120℃,贴缸时间不低于40s;
4)预热:预热温度设置在粘结纤维熔点以下5-15℃。
5)热压:采用两组钢辊对压的方式,上钢辊温度高于主体纤维热变形温度10-30℃,下钢辊温度高于主体纤维温度10-20℃,线速度在5-20m/min,线压力在80-120kN/m;
6)制备发泡胶粘剂,胶粘剂的成分为100-200质量份共聚物、1-3质量份发泡剂、甲苯溶剂,通过增加甲苯溶剂调整粘度为500-1500cps;
7)在湿法无纺布表面涂敷步骤6)的发泡胶粘剂,进行渗透,并在烘箱中100℃进行烘干处理。
2.根据权利要求1所述的新型半透膜支撑体的制备方法,其特征在于,主体纤维的纤维长度为3-6mm,直径为6-10μm;粘结纤维长度为3-6mm,直径为9-15μm;主体纤维和粘结纤维的质量比在5:5-7:3之间。
3.根据权利要求1所述的新型半透膜支撑体的制备方法,其特征在于,主体纤维为聚丙烯、聚丙烯酸酯、聚氨酯、聚酯、聚酰胺、聚酰亚胺、聚丙烯腈短切纤维中的一种或多种;粘结纤维为单组分纤维或者双组份纤维,双组份纤维为皮芯型、并列型、海岛型、桔瓣型复合纤维中的一种或多种。
4.根据权利要求1所述的新型半透膜支撑体的制备方法,其特征在于,纺粘无纺布的厚度为20-50μm,克重为15-35g/m2,透气度为1.4-2.0cm3/cm2/s。
5.根据权利要求1所述的新型半透膜支撑体的制备方法,其特征在于,共聚物为乙烯乙酸乙烯酯、乙烯丙烯酸甲酯共聚物、乙烯丙烯酸丁酯共聚物、聚酰胺聚合物、乙烯三元共聚物中的一种或者组合。
6.根据权利要求1所述的新型半透膜支撑体的制备方法,其特征在于,烘箱烘干后胶粘剂渗透至湿法无纺布厚度的60%-80%。
7.根据权利要求1所述的新型半透膜支撑体的制备方法,其特征在于,热压后,湿法无纺布层的厚度在60-80μm,表面平滑度在25-30s,透气度为3.0-6.0cm3/cm2/s,表面平滑度为25-30s。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110031441.8A CN113045999A (zh) | 2021-01-11 | 2021-01-11 | 一种新型半透膜支撑体的制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110031441.8A CN113045999A (zh) | 2021-01-11 | 2021-01-11 | 一种新型半透膜支撑体的制备方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN113045999A true CN113045999A (zh) | 2021-06-29 |
Family
ID=76508316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110031441.8A Pending CN113045999A (zh) | 2021-01-11 | 2021-01-11 | 一种新型半透膜支撑体的制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113045999A (zh) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008238147A (ja) * | 2007-03-29 | 2008-10-09 | Hokuetsu Paper Mills Ltd | 半透膜支持体 |
US20110151737A1 (en) * | 2009-12-17 | 2011-06-23 | 3M Innovative Properties Company | Dimensionally stable nonwoven fibrous webs and methods of making and using the same |
JP2013154341A (ja) * | 2012-11-30 | 2013-08-15 | Hokuetsu Kishu Paper Co Ltd | 半透膜支持体用不織布 |
CN103432912A (zh) * | 2013-08-02 | 2013-12-11 | 中国海诚工程科技股份有限公司 | 一种半透膜的复合支撑材及其制造方法 |
CN107913606A (zh) * | 2017-10-24 | 2018-04-17 | 浙江福斯特新材料研究院有限公司 | 一种半透膜支撑材料及其制备方法 |
CN108867154A (zh) * | 2018-06-08 | 2018-11-23 | 常州市康捷特种无纺布有限公司 | 一种用于水处理的mbr平板膜的湿法基材无纺布及其制备方法 |
CN110743381A (zh) * | 2019-11-08 | 2020-02-04 | 株洲时代华先材料科技有限公司 | 膜基材、分离膜及其制备方法 |
CN111485453A (zh) * | 2020-04-10 | 2020-08-04 | 宝鸡科达特种纸业有限责任公司 | 一种分离膜支撑用无纺布的制造方法 |
-
2021
- 2021-01-11 CN CN202110031441.8A patent/CN113045999A/zh active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008238147A (ja) * | 2007-03-29 | 2008-10-09 | Hokuetsu Paper Mills Ltd | 半透膜支持体 |
US20110151737A1 (en) * | 2009-12-17 | 2011-06-23 | 3M Innovative Properties Company | Dimensionally stable nonwoven fibrous webs and methods of making and using the same |
JP2013154341A (ja) * | 2012-11-30 | 2013-08-15 | Hokuetsu Kishu Paper Co Ltd | 半透膜支持体用不織布 |
CN103432912A (zh) * | 2013-08-02 | 2013-12-11 | 中国海诚工程科技股份有限公司 | 一种半透膜的复合支撑材及其制造方法 |
CN107913606A (zh) * | 2017-10-24 | 2018-04-17 | 浙江福斯特新材料研究院有限公司 | 一种半透膜支撑材料及其制备方法 |
CN108867154A (zh) * | 2018-06-08 | 2018-11-23 | 常州市康捷特种无纺布有限公司 | 一种用于水处理的mbr平板膜的湿法基材无纺布及其制备方法 |
CN110743381A (zh) * | 2019-11-08 | 2020-02-04 | 株洲时代华先材料科技有限公司 | 膜基材、分离膜及其制备方法 |
CN111485453A (zh) * | 2020-04-10 | 2020-08-04 | 宝鸡科达特种纸业有限责任公司 | 一种分离膜支撑用无纺布的制造方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107362694B (zh) | 一种无纺布基正渗透膜及其制备方法和应用 | |
CN110453377B (zh) | 支撑材料和半透膜复合材料 | |
JP5203518B1 (ja) | 半透膜支持体用不織布及びその製造方法 | |
CN107551832B (zh) | 一种再生纤维素基交联改性纳滤膜的制备方法 | |
CN107558291A (zh) | 半透膜支撑体用无纺布 | |
CN112663399B (zh) | 一种用于水处理反渗透膜支撑体基材的湿法无纺布及其制备方法 | |
CN110743381B (zh) | 膜基材、分离膜及其制备方法 | |
CN104053493B (zh) | 半透膜支撑体用无纺布 | |
JP6005542B2 (ja) | 半透膜支持体用不織布 | |
JP2001079368A (ja) | 分離膜支持体とその製造方法 | |
CN112774462A (zh) | 一种新型半透膜支撑体 | |
CN115287914A (zh) | 生物基超纤革及其加工方法 | |
CN113329803B (zh) | 湿法无纺布,其制备方法以及包含其的水处理膜 | |
CN113045999A (zh) | 一种新型半透膜支撑体的制备方法 | |
CN106823838A (zh) | 海水淡化用反渗透膜支撑体及制备方法 | |
CN103432912A (zh) | 一种半透膜的复合支撑材及其制造方法 | |
CN114080268A (zh) | 用作水处理膜支撑层的无纺布及其制备方法以及水处理膜 | |
JP2013180294A (ja) | 半透膜支持体用不織布及びその製造方法 | |
CN113996188B (zh) | 一种可降解Janus膜材料及其制备方法与应用 | |
CN112755796A (zh) | 一种半透膜支撑体及其制备方法 | |
CN112742217B (zh) | 一种半透膜支撑体 | |
CN112742218B (zh) | 一种半透膜支撑体的制备方法 | |
JP2017042691A (ja) | 膜分離活性汚泥処理用半透膜用支持体の製造方法 | |
CN114191998B (zh) | 一种逐梯式反渗透膜支撑体及其制备方法和应用 | |
CN117225190A (zh) | 纳滤膜用无纺布支撑材料及其制备方法与应用 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210629 |