JPS59133453A - Moisture-sensitive element - Google Patents
Moisture-sensitive elementInfo
- Publication number
- JPS59133453A JPS59133453A JP58008234A JP823483A JPS59133453A JP S59133453 A JPS59133453 A JP S59133453A JP 58008234 A JP58008234 A JP 58008234A JP 823483 A JP823483 A JP 823483A JP S59133453 A JPS59133453 A JP S59133453A
- Authority
- JP
- Japan
- Prior art keywords
- moisture
- copolymer
- polymer
- methacrylamide
- halide
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid
Abstract
Description
【発明の詳細な説明】
本発明は、空調機器等に好適な感湿素子に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a moisture sensing element suitable for air conditioning equipment and the like.
湿度を検知する方法には、種々のものがあるが、本発明
は高分子感湿剤皮膜を利用する。 即ち、これが雰囲気
の湿度を吸収することで抵抗値が変化することを利用し
ている。Although there are various methods for detecting humidity, the present invention utilizes a polymeric desensitizer film. In other words, it utilizes the fact that the resistance value changes as this absorbs the humidity of the atmosphere.
一般に感湿素子として有機高分子感湿剤皮膜を用いるこ
とは知られている。 しかし感湿素子は、種々の過酷な
条件にさらされ再現性を要するため高分子感湿剤皮膜に
要求される特性は極めて厳しいものがある。 すなわち
、要求される特性としては、
（イ）相対湿度を変化させたとき抵抗値が対数直線的に
変化をし、経時させても一定であること、←）高湿度雰
囲気から低湿度雰囲気に変化させた際にも（イ）と同じ
直線上を誤差なく戻ること、（ハ）一般に高分子感湿剤
は高湿度下に放置された場合それ自体水溶性であるため
、感湿剤の溶解脱着により抵抗特性が上昇してしまう場
合の多いため、かような高湿度下の放置においても充分
な耐久性を示すこと、
などが挙げられる。 そして従来の高分子感湿剤皮膜に
おいてかような特性すべてを充分に満足するものは木発
明者の知るところほとんど知られていない。It is generally known to use an organic polymer moisture sensitive film as a moisture sensitive element. However, since moisture-sensitive elements are exposed to various harsh conditions and require reproducibility, the properties required of the polymeric moisture-sensing agent film are extremely strict. In other words, the required characteristics are: (a) The resistance value changes log-linearly when the relative humidity changes and remains constant over time; ←) The resistance value changes from a high-humidity atmosphere to a low-humidity atmosphere. (c) In general, polymer moisture-sensing agents are themselves water-soluble when left in high humidity, so dissolution and desorption of the moisture-sensing agent will occur. Since resistance characteristics often increase due to oxidation, it is important that the material exhibits sufficient durability even when left in such high humidity conditions. To the knowledge of the inventor, there are hardly any conventional polymer moisture-sensitizer films that fully satisfy all of these characteristics.
本発明は前述の（イ）〜（ハ）の条件を殆んど満足でき
る高分子感湿剤を提供することを目的とするものである
。The object of the present invention is to provide a polymeric moisture sensitizer that can satisfy most of the conditions (a) to (c) above.
かくして本発明によれば、絶縁基板上の一対の電極間に
、感湿剤としてメタクリルアミドプロピルトリアルキル
アンモニウムハライドの重合体又は共重合体を用いてな
る感湿素子が提供される。Thus, according to the present invention, there is provided a moisture sensing element using a polymer or copolymer of methacrylamide propyl trialkylammonium halide as a moisture sensing agent between a pair of electrodes on an insulating substrate.
上記、メタクリルアミドプロピルトリアルキルアンモニ
ウムハライドとしては、下式（Ｉ）：ＯＨ。The above methacrylamide propyl trialkylammonium halide is represented by the following formula (I): OH.
（式中、Ｒはメチル基又はエチル基を、Ｘは塩素原子又
は臭素原子を示す）で表わされる化合物が適している。(wherein R represents a methyl group or an ethyl group, and X represents a chlorine atom or a bromine atom) is suitable.
入手性の点でＲはメチル基が好着しく、ｘは塩素原子
が好ましい。 かような化合物自体は従来繊維等の帯電
防止剤として知られており、例えばＭＡＰＴＡＯ（テキ
サコ石油社の商標名）の名称で入手可能でおる。From the viewpoint of availability, R is preferably a methyl group, and x is preferably a chlorine atom. Such a compound itself is conventionally known as an antistatic agent for fibers, etc., and is available under the name MAPTAO (trade name of Texaco Oil Company), for example.
本発明の感湿膜となる高分子は、上記メタクリルアミド
プロピルトリアルキルアンモニウム／Ｓライドを重合又
は共重合させることにより得られる。The polymer serving as the moisture-sensitive membrane of the present invention can be obtained by polymerizing or copolymerizing the methacrylamide propyl trialkylammonium/S ride.
通常、単独重合体を用いるより、適当な他のモノマーと
共重合させた共重合体を用いるのが、感湿膜の耐久性す
なわち前記（ハ）の条件をより満足せしめる点好ましい
。 適当な他のモノマーとしては、酢酸ビニル、メタク
リル酸低級アルキルエステル又ハトリエチレングリコー
ルジメタクリレートを用いるのが適当であり、その共重
合比は特に限定されることはないが通常、約ｌ：４〜４
：１とするのが適当である。Generally, rather than using a homopolymer, it is preferable to use a copolymer copolymerized with other suitable monomers, since the durability of the moisture-sensitive film, that is, the above condition (c) can be more satisfied. As suitable other monomers, it is suitable to use vinyl acetate, lower alkyl methacrylate, or triethylene glycol dimethacrylate, and the copolymerization ratio thereof is not particularly limited, but is usually about 1:4 to 4. 4
:1 is appropriate.
上記重合体及び共重合体は例えば、ラジカル発生剤を用
いるラジカル重合等の公知の重合方法により得られる。The above polymers and copolymers can be obtained, for example, by known polymerization methods such as radical polymerization using a radical generator.
その際の平均重合度は通常的１．００〜ａｏｏｏに調
整するのが好ましい。 ただし、これ以上又はこれ以下
の重合度のものも感湿性を発揮する範囲内で適用するこ
とができる。In this case, the average degree of polymerization is preferably adjusted to 1.00 to aooo. However, those having a polymerization degree higher or lower than this can also be used within the range that exhibits moisture sensitivity.
このようにして得た重合体又は共重合体をメタノール、
エタノール、アセトン等の有機溶媒に溶解したのち、感
湿素子の基板ことに電極間に塗布し乾燥して感湿膜を形
成させることにより本発明の感湿膜が得られる。The polymer or copolymer thus obtained was mixed with methanol,
The moisture-sensitive film of the present invention can be obtained by dissolving it in an organic solvent such as ethanol or acetone, applying it to a substrate of a humidity-sensitive element between electrodes, and drying it to form a moisture-sensitive film.
このようにして得られた本発明の感湿素子は、前記Ｇ）
〜ｆ→の特性を充分に満足するものである。The moisture-sensitive element of the present invention obtained in this manner has the above-mentioned G)
This fully satisfies the characteristics of ~f→.
さらにその応答性も類似の高分子感湿剤皮膜を有するも
のに比して迅速である。 従って、湿度測定を必要とす
る種々の分野における感湿素子として有用であり、とと
に空調機器等の感湿素子とし−５−１＋１＾
て好適である。Furthermore, its response is faster than that of a similar polymeric moisture-sensing agent film. Therefore, it is useful as a humidity sensing element in various fields that require humidity measurement, and is particularly suitable as a humidity sensing element in air conditioning equipment and the like.
以下、本発明を実施例及び図面罠より詳説するが、これ
により本発明は限定されるものではない。Hereinafter, the present invention will be explained in detail with reference to examples and drawings, but the present invention is not limited thereby.
実施例１
感湿剤の合成
テキサコ石油製ＭＡＰＴＡＯ（メタクリルアミドプロピ
ルトリメチルアンモニウムクロライド５０チ水溶液）よ
り脱水することで、メタクリルアミドプロピルトリメチ
ルアンモニウムクロライドのやや黄色を帯びた粉体を得
る。Example 1 Synthesis of a moisture sensitive agent A slightly yellowish powder of methacrylamide propyltrimethylammonium chloride is obtained by dehydrating MAPTAO (50% aqueous solution of methacrylamidepropyltrimethylammonium chloride) manufactured by Texaco Petroleum.
メタクリルアミドプロピルトリメチルアンそニウムクロ
ライドと酢酸ビニルとの共重合体は次のようにして得る
ことができる。A copolymer of methacrylamide propyl trimethyl anthonium chloride and vinyl acetate can be obtained as follows.
即ち、メタクリルアミドプロピルトリメチルアンモニウ
ムクロライド１（ｌと酢酸ビニル８．４ｆをメタノール
に溶解して６０ｍ１とし、これに重合開始剤として過酸
化ベンゾイル２００岬を加えて７０℃で１７時間重合反
応を行なう。 反応終了後冷却し、アセトン４６０献中
へ攪拌しつつ滴下することで共重合体の白色沈殿物を得
ることがで、 −６＝
きる。 同様な操作で、１０ｆのメタクリルアミドプロ
ピルトリメチルアンモニウムクロライドと、メタクリル
酸メチルエステル９．８１或いはトリエチレングリコー
ルジメタクリレート ０．５２ｆを感湿剤を合成するこ
とができる。That is, 1 (l) of methacrylamide propyltrimethylammonium chloride and 8.4 f of vinyl acetate were dissolved in methanol to make 60 ml, and 200 ml of benzoyl peroxide was added as a polymerization initiator, and a polymerization reaction was carried out at 70° C. for 17 hours. After the reaction is completed, cool it and add dropwise to 460 g of acetone with stirring to obtain a white precipitate of the copolymer, -6=.By the same operation, 10f of methacrylamide propyltrimethylammonium chloride and , methacrylic acid methyl ester 9.81f or triethylene glycol dimethacrylate 0.52f can be used to synthesize a moisture sensitive agent.
実施例２ 感湿剤の塗布及び性。Example 2 Application and properties of moisture sensitizers.
メタクリルアミドプロピルトリメチルアンモニウムクロ
ライドと酢酸ビニルとの共重合体である感湿剤をメタノ
ールに溶解して２％の溶液をつくる。 この液中に第１
・図の如く一対の櫛型の全箔製（１）（１）を設けたア
ルミナ製絶縁基板（２）を５秒間浸漬したのち引き上げ
、１１０″ｃ雰囲気中で８０分間乾燥させた。 こうし
て得た感湿素子（３）を第２図の如くリード線（４）（
４）を接続して、周波数Ｉ ＫＨｇ５ｖの交流電圧を電
源（５）より、１００Ｋｎの抵抗（６）を介して加える
ことで、この抵抗（６）にかかる両端電圧を測定するこ
とで２５℃相対湿度雰囲気空間（７）での感湿素子（３
）の抵抗値を算出した。 こうして得た相対湿度−抵抗
の特性曲線を第８図に示す。A moisture sensitizer, which is a copolymer of methacrylamide propyltrimethylammonium chloride and vinyl acetate, is dissolved in methanol to make a 2% solution. In this liquid, the first
・As shown in the figure, the alumina insulating substrate (2) provided with a pair of comb-shaped all-foil plates (1) (1) was immersed for 5 seconds, then pulled up and dried for 80 minutes in a 110"c atmosphere. Thus obtained. Connect the moisture sensitive element (3) with the lead wire (4) (as shown in Figure 2).
4) and apply an AC voltage with a frequency of I KHg 5v from the power supply (5) through a 100Kn resistor (6), and measure the voltage across this resistor (6). Moisture sensing element (3) in humidity atmosphere space (7)
) was calculated. The relative humidity-resistance characteristic curve thus obtained is shown in FIG.
このように初期特性蝶、相対湿度４０％〜１００チの範
囲で対数直線的に変化をしている。 また戻り即ち、相
対湿１ｉ１００チより４０％へ戻したときの変化も対数
直線的に変化し、初期特性との差異も殆んどない。 オ
た対湿性卵を調べるために、底部に水を張ったデシクー
ター内に感湿素子を静置して、蓋をして７日間放置した
のちの特性値の変化も示した。 第８図のように初期特
性と近い値であることがわかる。In this way, the initial characteristics of butterfly change log-linearly in the range of relative humidity of 40% to 100%. Furthermore, when the relative humidity returns from 1i100 to 40%, the change is logarithmically linear, and there is almost no difference from the initial characteristics. In order to investigate the difference between eggs and humidity, a humidity sensing element was placed in a desiccator filled with water at the bottom, and the change in characteristic values was also shown after leaving the device with a lid on for 7 days. As shown in FIG. 8, it can be seen that the values are close to the initial characteristics.
他の２種類の感湿剤、即ちメタクリルアミドプロピルト
リメチルアンモニウムクロライドとメタクリル酸メチル
エステル、トリエチレングリコールジメタクリレートの
いずれか一物質との共重合体による感湿剤についても、
相対湿度変化に対する対数直線性や戻りの対数直線性及
び対湿気性能は同様に優れたものであった。Regarding the other two types of moisture sensitizers, namely, the copolymer of methacrylamide propyltrimethylammonium chloride and any one of methacrylic acid methyl ester and triethylene glycol dimethacrylate,
The log linearity with respect to changes in relative humidity, the log linearity of return, and the humidity performance were similarly excellent.
第１図は、木発明の感湿剤を適用する感湿素子の一例１
を示す正面図であり、第２図は、第１図の感湿素子を用
いる測定回路の一例を示す構成説明図であり、第８図は
、木発明の感湿素子を用いた際の、相対湿度−抵抗特性
図の一例を示すグラフである。
（１）・・・電極、 （２）・・・絶縁基板、（３
）・・・感湿素子。
９−
第１図Figure 1 shows an example 1 of a moisture-sensing element to which the moisture-sensing agent of Wood's invention is applied.
FIG. 2 is a configuration explanatory diagram showing an example of a measurement circuit using the moisture sensing element of FIG. 1, and FIG. It is a graph which shows an example of a relative humidity-resistance characteristic diagram. (1)...electrode, (2)...insulating substrate, (3
)...Moisture sensing element. 9- Figure 1
Claims (1)
■）： Ｈ３ 寡 （式中、Ｒはメチル基又はエチル基を、Ｘは塩素原子又
は臭素原子を示す） で表わされるメタクリルアミドプロピルトリアルキルア
ンモニウムハライドの重合体又は共重合体を用いてなる
感湿素子。 １ メタクリルアミドプロピルトリアルキルアンモニウ
ムハライドの共重合体が、メタクリルアミドプロビルト
リメチルアンモニウムノ為ライトド、酢酸ビニル、メタ
クリル酸低級アルキルエステル又はトリエチレングリコ
ールジメタクリレートとの共重合体である特許請求の範
囲第１項記載の感湿素子。[Claims] 1. Between a pair of electrodes on an insulating substrate, the following formula (
■): H3 (in the formula, R represents a methyl group or an ethyl group, and X represents a chlorine atom or a bromine atom). Wet element. 1. The copolymer of methacrylamide propyl trialkylammonium halide is a copolymer of methacrylamide propyl trimethylammonium monomeritide, vinyl acetate, lower alkyl methacrylate, or triethylene glycol dimethacrylate. Moisture sensitive element according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58008234A JPS59133453A (en) | 1983-01-20 | 1983-01-20 | Moisture-sensitive element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58008234A JPS59133453A (en) | 1983-01-20 | 1983-01-20 | Moisture-sensitive element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59133453A true JPS59133453A (en) | 1984-07-31 |
| JPH0416742B2 JPH0416742B2 (en) | 1992-03-25 |
Family
ID=11687459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58008234A Granted JPS59133453A (en) | 1983-01-20 | 1983-01-20 | Moisture-sensitive element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59133453A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5480191A (en) * | 1977-12-08 | 1979-06-26 | Shinei Kk | Humidityysensitive element |
| JPS5510502A (en) * | 1978-05-25 | 1980-01-25 | Shinei Kk | Moisture sensitive element |
| JPS5529774A (en) * | 1978-08-24 | 1980-03-03 | Shinei Kk | Relative humidity detector |
| JPS57190258A (en) * | 1981-05-20 | 1982-11-22 | Hitachi Ltd | Humidity sensor |
-
1983
- 1983-01-20 JP JP58008234A patent/JPS59133453A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5480191A (en) * | 1977-12-08 | 1979-06-26 | Shinei Kk | Humidityysensitive element |
| JPS5510502A (en) * | 1978-05-25 | 1980-01-25 | Shinei Kk | Moisture sensitive element |
| JPS5529774A (en) * | 1978-08-24 | 1980-03-03 | Shinei Kk | Relative humidity detector |
| JPS57190258A (en) * | 1981-05-20 | 1982-11-22 | Hitachi Ltd | Humidity sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0416742B2 (en) | 1992-03-25 |
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