JPH05329346A - Composite semipermeable membrane - Google Patents

Composite semipermeable membrane

Info

Publication number
JPH05329346A
JPH05329346A JP14036992A JP14036992A JPH05329346A JP H05329346 A JPH05329346 A JP H05329346A JP 14036992 A JP14036992 A JP 14036992A JP 14036992 A JP14036992 A JP 14036992A JP H05329346 A JPH05329346 A JP H05329346A
Authority
JP
Japan
Prior art keywords
membrane
composite semipermeable
semipermeable membrane
silicone resin
crosslinked
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
Application number
JP14036992A
Other languages
Japanese (ja)
Inventor
Hiroyoshi Ito
弘喜 伊藤
Toshiyuki Kawashima
敏行 川島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Denko Corp
Original Assignee
Nitto Denko Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nitto Denko Corp filed Critical Nitto Denko Corp
Priority to JP14036992A priority Critical patent/JPH05329346A/en
Publication of JPH05329346A publication Critical patent/JPH05329346A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To further enhance removing capacity by further forming a crosslinkable silicone resin layer on the surface of a crosslinked semipermeable membrane in a crosslinked state. CONSTITUTION:An aqueous solution containing 0.25wt.% of polyvinyl alcohol and 0.25wt.% of piperadine is applied on a porous base material composed of a polysulfone ultrafiltration filter membrane and the coating layer is crosslinked by 1wt.% of trimesic chloride and 1wt.% of isophthaloylchoride to obtain a composite semipermeable membrane. A hexane solution containing 0.2wt.% of a crosslinkable silicone resin (both-terminal hydroxydimethylpolysiloxane) is applied to the surface of this membrane and the coating layer is heat-treated at 100 deg.C for 4 min to obtain a composite semipermeable membrane coated with the membrane layer composed of the crosslinked silicone resin. As the result of the reverse osmosis test of this membrane, a removal ratio of 98.0% and a water transmission amount of 0.75m<3>/m<2>.d are obtained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、各種液体混合物を選択
分離するための複合半透膜に関し、詳しくはスキン層表
面が架橋性シリコーン樹脂が架橋されてなる薄膜層で被
覆されてなる除去性能の良好な複合半透膜に関する。さ
らに詳しくは、例えば、井水、工水、かん水、海水等の
脱塩による淡水化や、半導体の製造に必要とされる超純
水の製造等に好適に用いる複合半透膜に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite semipermeable membrane for selectively separating various liquid mixtures. More specifically, the removal performance is obtained by coating the surface of the skin layer with a thin film layer formed by crosslinking a crosslinkable silicone resin. Of a good composite semipermeable membrane. More specifically, the present invention relates to a composite semipermeable membrane that is suitably used for desalination of well water, industrial water, brackish water, seawater, etc. by desalination, and ultrapure water required for semiconductor production.

【0002】[0002]

【従来の技術】近年、逆浸透膜として多孔性基材上に半
透性を有する薄膜を形成させた複合半透膜が種々提案さ
れている。このような複合半透膜は一般に、多孔性基材
上に反応性基質の水溶液を塗布した後、ヘキサンのよう
な水非混和性の有機溶剤に溶解したトリレンジイソシア
ネート、塩化イソフタロイル、トリメシン酸クロライド
等の多官能性架橋剤の溶液と接触させ、水相と有機相の
界面で反応性基質を架橋剤として反応させる界面反応を
利用して、半透性を有する薄膜(緻密層)を形成させる
ことにより製造されている。
2. Description of the Related Art In recent years, various composite semipermeable membranes have been proposed as a reverse osmosis membrane in which a semipermeable thin film is formed on a porous substrate. Such composite semipermeable membranes are generally prepared by applying an aqueous solution of a reactive substrate onto a porous substrate and then dissolving it in a water-immiscible organic solvent such as hexane, tolylene diisocyanate, isophthaloyl chloride, trimesic acid chloride. A semipermeable thin film (dense layer) is formed by using an interfacial reaction in which a reactive substrate is reacted as a crosslinking agent at the interface between an aqueous phase and an organic phase by contacting with a solution of a polyfunctional crosslinking agent such as It is manufactured by

【0003】具体的には、例えば多孔性基材にポリスル
ホン限外濾過膜を用い、反応性基質としてポリエチレン
イミンを用いた複合半透膜(特開昭49−133282
号公報)、アミン変性エピクロロヒドリンを用いた複合
半透膜(特公昭55−38164号公報)、ポリエチレ
ンイミン等の水溶性重合体とポリアミノ化合物単量体混
合物を用いた複合半透膜(特開昭57−27101号公
報及び特開昭57−27102号公報)、多官能芳香族
アミンと多官能酸ハロゲン化物との界面重合によって得
られるポリアミドからなる薄膜を、多孔性基材上に形成
した複合半透膜(特公昭63−36803号公報)等が
知られている。このような複合半透膜は、従来の酢酸セ
ルロース膜に代表される非対称膜に比較して、除去性、
透水性、耐熱性等の点で優れている。
Specifically, for example, a polysulfone ultrafiltration membrane is used as a porous substrate, and a composite semipermeable membrane using polyethyleneimine as a reactive substrate (JP-A-49-133282).
No.), a composite semipermeable membrane using amine-modified epichlorohydrin (Japanese Patent Publication No. 55-38164), and a composite semipermeable membrane using a water-soluble polymer such as polyethyleneimine and a polyamino compound monomer mixture ( JP-A-57-27101 and JP-A-57-27102), a thin film made of polyamide obtained by interfacial polymerization of a polyfunctional aromatic amine and a polyfunctional acid halide is formed on a porous substrate. A composite semipermeable membrane (Japanese Patent Publication No. 63-36803) is known. Such a composite semipermeable membrane has removability, compared with asymmetric membranes typified by conventional cellulose acetate membranes.
Excellent in water permeability and heat resistance.

【0004】[0004]

【発明が解決しようとする課題】しかしながら前記従来
技術の複合半透膜は、実際に使用される用途によって
は、なお除去性能が十分ではなく、さらにその改善が要
望されている。例えば、半導体の高容量化に伴いさらに
クリーンな超純水が要求されてきたり、また、海水の1
段脱塩等を満たすためには、現在の複合半透膜では不十
分であり、さらに高い除去性能及び水透過性を有する複
合半透膜が求められている。
However, the above-mentioned prior art composite semipermeable membranes are still insufficient in removal performance depending on the actual use, and further improvement is required. For example, as the capacity of semiconductors has increased, cleaner ultrapure water has been required.
The current composite semipermeable membranes are not sufficient for satisfying step desalination and the like, and composite semipermeable membranes having higher removal performance and water permeability are required.

【0005】本発明は前記従来技術の課題を解決するた
め、複合半透膜の表面を架橋性シリコーン樹脂が架橋さ
れてなる薄膜層で被覆することにより、除去性能を向上
させた複合半透膜を提供することを目的とする。
In order to solve the above-mentioned problems of the prior art, the present invention coats the surface of the composite semipermeable membrane with a thin film layer formed by crosslinking a crosslinkable silicone resin to improve the removal performance. The purpose is to provide.

【0006】[0006]

【課題を解決するための手段】前記目的を達成するため
本発明の複合半透膜は、多孔性基材上に、1分子中に2
個以上の官能基を有する反応性基質が上記官能基と反応
し得る多官能性架橋剤で架橋されてなる半透性薄膜が形
成され、さらに前記半透性薄膜の表面に架橋性シリコー
ン樹脂が架橋被覆されているという構成を備えたもので
ある。
In order to achieve the above-mentioned object, the composite semipermeable membrane of the present invention comprises a porous base material, and 2 per molecule.
A reactive substrate having at least one functional group is crosslinked with a polyfunctional crosslinking agent capable of reacting with the functional group to form a semipermeable thin film, and a crosslinkable silicone resin is further formed on the surface of the semipermeable thin film. It has a structure of being cross-linked.

【0007】[0007]

【作用】前記本発明の構成によれば、架橋された半透性
薄膜の表面にさらに架橋性シリコーン樹脂が架橋されて
いることにより、除去性能をさらに向上させることがで
きる。
According to the above-mentioned constitution of the present invention, since the surface of the crosslinked semipermeable thin film is further crosslinked with the crosslinkable silicone resin, the removal performance can be further improved.

【0008】[0008]

【実施例】本発明において用いる多孔性基材は、薄膜を
支持し得るものである限り特に限定されないが、通常、
表面に孔径1〜50nm(ナノメータ)の微孔を有する
限外濾過膜が用いられる。素材としては、例えば、ポリ
スルホン、ポリエーテルスルホン、ポリアクリロニトリ
ル、ポリイミド、エチレン−ビニルアルコール共重合
体、酢酸セルロース等が挙げられる。特に耐熱性、耐酸
化剤性等の点から、ポリスルホン、ポリエーテルスルホ
ン等が好ましい。またこのような多孔質膜は織布、不織
布等で裏打ち補強されていてもよい。
EXAMPLES The porous substrate used in the present invention is not particularly limited as long as it can support a thin film, but it is usually
An ultrafiltration membrane having micropores with a pore diameter of 1 to 50 nm (nanometer) on the surface is used. Examples of the material include polysulfone, polyether sulfone, polyacrylonitrile, polyimide, ethylene-vinyl alcohol copolymer, and cellulose acetate. Particularly, polysulfone, polyether sulfone and the like are preferable from the viewpoints of heat resistance, resistance to oxidants and the like. Further, such a porous membrane may be reinforced by lining with a woven cloth, a non-woven cloth or the like.

【0009】本発明において用いる反応性基質とは、1
分子中に2個以上の官能基を有する単量体、オリゴマー
及びポリマーをいい、従来より多官能性架橋剤により架
橋、重合して、半透性を有する薄膜を形成することが知
られている任意の反応性基質を含む。上記官能基として
は、アミノ基、水酸基、チオール基、カルボキシル基、
アミド基、尿素基等を挙げることができる。特に除去性
能を高くするという点からアミノ基、水酸基が好まし
い。これらの反応性基質は水溶性であることを要し、こ
こで水溶性とは室温において水又は炭素数1〜4の脂肪
族アルコールと水との混合溶剤に0.1重量%以上の溶
解性を有することを意味する。
The reactive substrate used in the present invention is 1
A monomer, an oligomer or a polymer having two or more functional groups in the molecule, which has been conventionally known to crosslink and polymerize with a polyfunctional crosslinking agent to form a semipermeable thin film. Includes any reactive substrate. As the functional group, an amino group, a hydroxyl group, a thiol group, a carboxyl group,
Examples thereof include an amide group and a urea group. Particularly, an amino group and a hydroxyl group are preferable from the viewpoint of enhancing the removal performance. These reactive substrates are required to be water-soluble, where water-soluble means that the solubility in water or a mixed solvent of an aliphatic alcohol having 1 to 4 carbon atoms and water is 0.1% by weight or more. Means to have.

【0010】従って、本発明において好ましく用いられ
る反応性基質の具体例としては、ポリエチレンイミン、
アミン変性ポリエピクロロヒドリン、アミン変性(エピ
クロロヒドリン−酸化エチレン)共重合体、ポリビニル
アルコール、アミノ化ポリスチレン、ヒドロキシル化ポ
リスチレン、アミノ化ポリスルホン等の水溶性ポリマ
ー、ピペラジン−トリメシ酸クロライドオリゴマー等の
水溶性オリゴマー、エチレンジアミン、ピペラジン、ア
ミノピペリジン、フェニレンジアミン等の単量体、及び
これらの任意の2以上の混合物を挙げることができる。
Therefore, specific examples of the reactive substrate preferably used in the present invention include polyethyleneimine,
Amine-modified polyepichlorohydrin, amine-modified (epichlorohydrin-ethylene oxide) copolymer, polyvinyl alcohol, aminated polystyrene, hydroxylated polystyrene, water-soluble polymers such as aminated polysulfone, piperazine-trimesic acid chloride oligomer, etc. Water-soluble oligomers, ethylenediamine, piperazine, aminopiperidine, phenylenediamine, and other monomers, and mixtures of any two or more thereof.

【0011】また本発明で用いる多官能性架橋剤とは、
前記反応基質の有する官能基と反応し得る官能基を1分
子中に2個以上有する化合物をいい、後者の官能基の具
体例として、酸ハライド基、酸無水物基、イソシアネー
ト基、ハロゲンスルホニル基、ハロホルメート基、N−
ハロホルミル基等を挙げることができる。
The polyfunctional crosslinking agent used in the present invention is
A compound having two or more functional groups capable of reacting with the functional group of the reaction substrate in one molecule. Specific examples of the latter functional groups include acid halide groups, acid anhydride groups, isocyanate groups, and halogensulfonyl groups. , Haloformate group, N-
A haloformyl group etc. can be mentioned.

【0012】従って好ましい多官能性架橋剤の具体例と
して、塩化イソフタロイル、塩化テレフタロイル、(化
1)、(化2)等、及びこれらの任意の2以上の混合物
を挙げることができる。本発明においては特に、膜の除
去性能を高くするという点から、塩化イソフタロイル、
トリメシン酸クロライド、ブタンテトラカルボン酸クロ
ライド等が好ましい。
Therefore, specific examples of preferable polyfunctional crosslinking agents include isophthaloyl chloride, terephthaloyl chloride, (Chemical formula 1), (Chemical formula 2), and the like, and a mixture of any two or more thereof. In the present invention, in particular, isophthaloyl chloride, from the viewpoint of enhancing the removal performance of the film,
Preferred are trimesic acid chloride, butane tetracarboxylic acid chloride and the like.

【0013】[0013]

【化1】 [Chemical 1]

【0014】[0014]

【化2】 [Chemical 2]

【0015】本発明において適用される複合半透膜は、
前記多孔性基材上に、反応性基質を含む水溶液を塗布又
は含浸させ、次いで多官能性架橋剤を含む水非混和性有
機溶剤溶液と接触させ、界面反応によって反応性基質を
架橋、重合させて薄膜を形成させたもので、必要に応じ
て加熱処理されたものを含む。
The composite semipermeable membrane applied in the present invention is
An aqueous solution containing a reactive substrate is applied or impregnated on the porous substrate, and then contacted with a water-immiscible organic solvent solution containing a polyfunctional crosslinking agent to crosslink and polymerize the reactive substrate by an interfacial reaction. A thin film is formed by the above method, and includes one that is heat-treated as necessary.

【0016】本発明は、上記複合半透膜の表面がさらに
架橋性シリコーン樹脂が架橋されてなる薄膜層で被覆さ
れてなる複合半透膜である。かかる複合半透膜は、後述
の架橋性シリコーン樹脂を溶解した製膜溶液を前記複合
半透膜の表面に塗布し、架橋させればよい。
The present invention is a composite semipermeable membrane, wherein the surface of the composite semipermeable membrane is further covered with a thin film layer obtained by crosslinking a crosslinkable silicone resin. The composite semipermeable membrane may be formed by applying a film-forming solution in which a crosslinkable silicone resin described later is dissolved to the surface of the composite semipermeable membrane and crosslinking the same.

【0017】本発明において用いる架橋性シリコーン樹
脂とは、架橋前は有機溶剤に可溶性であるが、架橋後に
は有機溶剤に不溶性の樹脂を与えるシリコーン樹脂をい
う。かかる架橋性シリコーン樹脂は、各分子鎖末端に種
々の反応性基を有し、この反応性基によって、場合によ
っては架橋剤又は硬化剤の存在下に相互に架橋する。
The crosslinkable silicone resin used in the present invention is a silicone resin which is soluble in an organic solvent before crosslinking but gives an insoluble resin in the organic solvent after crosslinking. Such a crosslinkable silicone resin has various reactive groups at the ends of each molecular chain, and these reactive groups crosslink each other in the presence of a crosslinking agent or a curing agent in some cases.

【0018】このような架橋性シリコーン樹脂は、通
常、一般式(化3)、(化4)または(化5)〕(但
し、p+q=nである。)で表わされ、式中、Xは反応
性基を示し、R2 はアルキル基又はアリール基を示し、
繰返し単位の一部は、一般式(化6)であってもよい。
2 は上記と同じである。また、上記式において、n
は、通常、10000〜300000の平均分子量を有
するような数である。
Such a crosslinkable silicone resin is generally represented by the general formula (Formula 3), (Formula 4) or (Formula 5)] (where p + q = n), where X is Represents a reactive group, R 2 represents an alkyl group or an aryl group,
A part of the repeating unit may be represented by the general formula (Formula 6).
R 2 is the same as above. In the above equation, n
Is usually a number such that it has an average molecular weight of 10,000 to 300,000.

【0019】上記一般式において、反応性基Xとして
は、例えば、ビニル基、アクリロキシアルキル基、メタ
クリロキシアルキル基、水酸基、ヒドロキシアルキル
基、アシロキシ基、アルコキシ基、アミノアルキル基、
カルボキシルアルキル基、ケトキシム基、アルキルアミ
ノ基、アミド基等を挙げることができる。R2 は、一部
は、かかる反応性基であってもよい。R2 は、代表的に
は、メチル基又はフェニル基である。
In the above general formula, the reactive group X is, for example, a vinyl group, an acryloxyalkyl group, a methacryloxyalkyl group, a hydroxyl group, a hydroxyalkyl group, an acyloxy group, an alkoxy group, an aminoalkyl group,
Examples thereof include a carboxylalkyl group, a ketoxime group, an alkylamino group and an amide group. R 2 may partly be such a reactive group. R 2 is typically a methyl group or a phenyl group.

【0020】[0020]

【化3】 [Chemical 3]

【0021】[0021]

【化4】 [Chemical 4]

【0022】[0022]

【化5】 [Chemical 5]

【0023】[0023]

【化6】 [Chemical 6]

【0024】上記のような反応性基を有する架橋性シリ
コーン樹脂は、既に種々のものが知られており、市販品
として入手することができる。上記のような分子鎖末端
に反応性基を有する架橋性シリコーン樹脂を架橋させる
に際しては、必要に応じて、架橋剤、硬化剤又は重合開
始剤が用いられる。
Various types of crosslinkable silicone resins having the above-mentioned reactive groups are already known and can be obtained as commercial products. When the crosslinkable silicone resin having a reactive group at the terminal of the molecular chain as described above is crosslinked, a crosslinking agent, a curing agent or a polymerization initiator is used, if necessary.

【0025】架橋性シリコーン樹脂の有機溶液を形成す
るための有機溶剤は、複合膜性能に悪影響を及ぼさない
ものであれば特に制限されず、樹脂に応じて適宜に選ば
れ、例えば、脂肪族炭化水素溶剤、芳香族炭化水素溶
剤、アルコール系溶剤、カルボン酸系溶剤、エステル系
溶剤、ケトン系溶剤、エーテル系溶剤、ハロゲン化炭化
水素系溶剤等が用いられる。
The organic solvent for forming the organic solution of the crosslinkable silicone resin is not particularly limited as long as it does not adversely affect the performance of the composite membrane, and is appropriately selected according to the resin, for example, aliphatic carbonization. Hydrogen solvent, aromatic hydrocarbon solvent, alcohol solvent, carboxylic acid solvent, ester solvent, ketone solvent, ether solvent, halogenated hydrocarbon solvent, etc. are used.

【0026】また、有機溶液中の架橋性シリコーン樹脂
の濃度は、通常0.01〜10重量%、好ましくは0.
05〜5重量%である。樹脂濃度が0.01重量%より
も小さいときは、形成される薄膜に膜欠陥が生じやすい
ので好ましくなく、一方、10重量%よりも高いとき
は、膜の透水量が小さすぎるので好ましくない。
The concentration of the crosslinkable silicone resin in the organic solution is usually 0.01 to 10% by weight, preferably 0.
It is from 05 to 5% by weight. When the resin concentration is less than 0.01% by weight, film defects are likely to occur in the formed thin film, which is not preferable, while when it is more than 10% by weight, the water permeability of the film is too small, which is not preferable.

【0027】上記した方法により架橋性シリコーン樹脂
が架橋されてなる薄膜層が表面に被覆されてなる複合半
透膜が得られるが、この後必要に応じて、加熱乾燥処理
を行うこともできる。加熱温度は複合膜性能を低下させ
ない範囲であればよく、通常30〜150℃、好ましく
は30〜120℃で、加熱時間は1〜30分間、好まし
くは2〜10分間である。
By the above-mentioned method, a composite semipermeable membrane having a surface coated with a thin film layer obtained by crosslinking a crosslinkable silicone resin can be obtained. After that, a heat drying treatment can be carried out if necessary. The heating temperature may be in a range that does not deteriorate the performance of the composite membrane, and is usually 30 to 150 ° C, preferably 30 to 120 ° C, and the heating time is 1 to 30 minutes, preferably 2 to 10 minutes.

【0028】以下具体的実施例を挙げて本発明を説明す
るが、本発明はこれら実施例により何ら限定されるもの
ではない。 実施例1 表面に平均孔径25nmを有するポリスルホンからなる
多孔性支持膜上に、0.25重量%ポリビニルアルコー
ルと0.25重量%ピペラジンを含んだ水溶液を塗布
し、1重量%トリメシン酸クロライドと1重量%塩化イ
ソフタロイルで架橋させて複合半透膜を得た。この膜の
表面に、架橋性シリコーン樹脂(両末端ヒドロキシ−ジ
メチルポリシロキサン)を0.2重量%を含むヘキサン
溶液を塗布し、100℃で4分間加熱処理を施すことに
より、表面が架橋性シリコーン樹脂が架橋されてなる薄
膜層で被覆された複合半透膜を得た。
The present invention will be described below with reference to specific examples, but the present invention is not limited to these examples. Example 1 An aqueous solution containing 0.25% by weight of polyvinyl alcohol and 0.25% by weight of piperazine was applied onto a porous support membrane made of polysulfone having an average pore size of 25 nm on the surface, and 1% by weight of trimesic acid chloride and 1 A composite semipermeable membrane was obtained by crosslinking with isophthaloyl chloride by weight. A hexane solution containing 0.2% by weight of a crosslinkable silicone resin (hydroxy-dimethylpolysiloxane at both ends) was applied to the surface of this film, and heat-treated at 100 ° C. for 4 minutes to give a crosslinkable silicone surface. A composite semipermeable membrane covered with a thin film layer obtained by crosslinking a resin was obtained.

【0029】この膜に、塩化ナトリウムの2000pp
m水溶液を25℃、圧力15kg/cm2 の条件下で逆
浸透試験を行なったところ、除去率は98.0%、透水
量は0.75m3 /m2 ・dであった。
2000 pp of sodium chloride was added to this film.
When a reverse osmosis test was conducted on the m aqueous solution under the conditions of 25 ° C. and a pressure of 15 kg / cm 2 , the removal rate was 98.0% and the water permeation rate was 0.75 m 3 / m 2 · d.

【0030】比較例1 実施例1において表面を架橋性シリコーン樹脂が架橋さ
れてなる薄膜層で被覆しない以外は実施例1と同様にし
て得た複合半透膜の逆浸透試験を行なったところ、除去
性能は92.5%、透水量は1.75m3 /m2 ・dで
あった。
Comparative Example 1 A reverse osmosis test was conducted on a composite semipermeable membrane obtained in the same manner as in Example 1 except that the surface of Example 1 was not covered with a thin film layer formed by crosslinking a crosslinkable silicone resin. The removal performance was 92.5% and the water permeability was 1.75 m 3 / m 2 · d.

【0031】実施例2 ポリスルホンからなる多孔性支持膜上に、2重量%m−
フェニレンジアミン水溶液を塗布し、0.1重量%トリ
メシン酸クロライドと0.15重量%塩化イソフタロイ
ルで架橋させて複合半透膜を得た。この膜を逆浸透試験
をしたところ、除去性能98.5%、透水量1.5m3
/m2 ・dであった。さらに、この膜の表面に、架橋性
シリコーン樹脂(メチルフェニルポリシロキサン)を
0.1重量%を含むヘプタン溶液を塗布し、140℃で
2分間加熱処理を施すことにより、表面が架橋性シリコ
ーン樹脂が架橋されてなる薄膜層で被覆された複合半透
膜を得た。この膜を逆浸透試験をしたところ、除去性能
は99.5%、透水量は1.2m3 /m2 ・dであっ
た。
Example 2 On a porous supporting membrane made of polysulfone, 2% by weight m-
A phenylenediamine aqueous solution was applied and crosslinked with 0.1% by weight trimesic acid chloride and 0.15% by weight isophthaloyl chloride to obtain a composite semipermeable membrane. A reverse osmosis test was conducted on this membrane, which revealed that the removal performance was 98.5% and the water permeability was 1.5 m 3.
/ M 2 · d. Furthermore, a heptane solution containing 0.1% by weight of a crosslinkable silicone resin (methylphenylpolysiloxane) was applied to the surface of this film, and heat treatment was performed at 140 ° C. for 2 minutes, whereby the surface was crosslinkable silicone resin. A composite semipermeable membrane covered with a thin film layer formed by crosslinking was obtained. When a reverse osmosis test was conducted on this membrane, the removal performance was 99.5% and the water permeation rate was 1.2 m 3 / m 2 · d.

【0032】[0032]

【発明の効果】本発明の複合半透膜は、従来の複合半透
膜と比較して除去性能が格段向上しているため、特にク
リーンな水が要求される分野、例えば、かん水、海水等
の脱塩による淡水化や、半導体の製造に必要とされる超
純水の製造等に好適に用いることができる。
Since the composite semipermeable membrane of the present invention has remarkably improved removal performance as compared with the conventional composite semipermeable membrane, it is used in fields requiring particularly clean water, such as brackish water and seawater. It can be preferably used for desalination by desalting of ss, and for production of ultrapure water required for semiconductor production.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 多孔性基材上に、1分子中に2個以上の
官能基を有する反応性基質が上記官能基と反応し得る多
官能性架橋剤で架橋されてなる半透性薄膜が形成され、
さらに前記半透性薄膜の表面に架橋性シリコーン樹脂が
架橋被覆されてなる複合半透膜。
1. A semipermeable thin film comprising a porous substrate and a reactive substrate having two or more functional groups in one molecule crosslinked with a polyfunctional crosslinking agent capable of reacting with the functional groups. Formed,
Further, a composite semipermeable membrane in which the surface of the semipermeable thin film is crosslinked with a crosslinkable silicone resin.
JP14036992A 1992-06-01 1992-06-01 Composite semipermeable membrane Pending JPH05329346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14036992A JPH05329346A (en) 1992-06-01 1992-06-01 Composite semipermeable membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14036992A JPH05329346A (en) 1992-06-01 1992-06-01 Composite semipermeable membrane

Publications (1)

Publication Number Publication Date
JPH05329346A true JPH05329346A (en) 1993-12-14

Family

ID=15267228

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14036992A Pending JPH05329346A (en) 1992-06-01 1992-06-01 Composite semipermeable membrane

Country Status (1)

Country Link
JP (1) JPH05329346A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101240736B1 (en) * 2008-12-23 2013-03-07 주식회사 엘지화학 Polymer compositions, water-treatment membranes and water-treatment modules comprising the same
JP2013512100A (en) * 2009-12-01 2013-04-11 エヴォニク ゴールドシュミット ゲーエムベーハー High separation efficiency silicone composite membrane
JP2015139742A (en) * 2014-01-28 2015-08-03 日東電工株式会社 Composite separation membrane and separation membrane element using the same
JP2016093797A (en) * 2014-11-17 2016-05-26 日東電工株式会社 Composite separation membrane and separation membrane element using the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101240736B1 (en) * 2008-12-23 2013-03-07 주식회사 엘지화학 Polymer compositions, water-treatment membranes and water-treatment modules comprising the same
JP2013512100A (en) * 2009-12-01 2013-04-11 エヴォニク ゴールドシュミット ゲーエムベーハー High separation efficiency silicone composite membrane
JP2015139742A (en) * 2014-01-28 2015-08-03 日東電工株式会社 Composite separation membrane and separation membrane element using the same
WO2015114727A1 (en) * 2014-01-28 2015-08-06 日東電工株式会社 Composite separation membrane and separation membrane element using same
JP2016093797A (en) * 2014-11-17 2016-05-26 日東電工株式会社 Composite separation membrane and separation membrane element using the same

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