JP2020062843A - 積層体、積層体の製造方法および形状制御デバイス - Google Patents
積層体、積層体の製造方法および形状制御デバイス Download PDFInfo
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- JP2020062843A JP2020062843A JP2018196996A JP2018196996A JP2020062843A JP 2020062843 A JP2020062843 A JP 2020062843A JP 2018196996 A JP2018196996 A JP 2018196996A JP 2018196996 A JP2018196996 A JP 2018196996A JP 2020062843 A JP2020062843 A JP 2020062843A
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- hydrogel
- layer
- hydrogel layer
- laminate
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Abstract
Description
図1は、本実施形態の積層体1および形状制御デバイス100の概略斜視図、図2は図1の線分II−IIにおける矢視断面図である。
以下、順に説明する。
(基材)
基材10は、ハイドロゲル層20を支持する。基材10の剛性率は、ハイドロゲル層20の剛性率とは異なる。例えば、基材10の剛性率は、ハイドロゲル層20の剛性率よりも高い。
ハイドロゲル層20は、ハイドロゲルを形成材料とし、基材10の一面に設けられている。
熱刺激に応答する高分子材料としては、ポリ(N−イソプロピルアクリルアミド)やポリ(メチルビニルエーテル)を挙げることができる。
積層体1は、基材10とハイドロゲル層20との界面に、基材10とハイドロゲル層20とが接着する接着領域1aと、基材10とハイドロゲル層20とが接着しない非接着領域1bと、が形成されている。
形状制御デバイス100が有する入力部40は、ハイドロゲル層20に、刺激応答性ハイドロゲルが反応する刺激を入力する。入力部40は、電極41と電源42とを有している。電極41は、基材10の法線方向から見た視野において基材10と同形状である矩形を呈している。
次いで、積層体の製造方法について説明する。
図5〜10は、積層体の製造方法(第1の製造方法)を説明する工程図である。
図5〜7は、本発明における「パターンを形成する工程」を説明する図である。図8は、本発明における「前駆体溶液を塗布する工程」を説明する図である。図9、10は、本発明における「前駆体を重合させる工程」を説明する図である。
以上のようにして、積層体1が得られる。
図11〜15は、積層体の製造方法(第2の製造方法)を説明する工程図である。
図11、12は、本発明における「重合開始剤の層を形成する工程」を説明する図である。図13は、本発明における「前駆体溶液を塗布する工程」を説明する図である。図14、15は、本発明における「前駆体を重合させる工程」を説明する図である。
図16〜18は、積層体の製造方法(第3の製造方法)を説明する工程図である。
図16は、本発明における「ゲル陥入性高分子のパターンを形成する工程」を説明する図である。図17、18は、本発明における「接触させる工程」を説明する図である。
基材10上にシアノアクリレート系の接着剤のパターンを形成し、シート材25を接触させることによって、シート材25内の水分を開始剤としたシアノアクレレートモノマーのアニオン重合が開始され、両者を強固に接着することができる。この場合、シート材25と接着剤とが重なる部分では接着領域となり、シート材25と接着剤とが重ならない部分では非接着領域となる。
上述の第1の製造方法を用いて、積層体を作製した。
まず、基材であるガラス基板を、水酸化ナトリウム水溶液で洗浄し、さらに酸素プラズマで処理した。その後、ガラス基板のプラズマ処理面に、シランカップリング剤を塗布した。シランカップリング剤として、メタクリル基を有するシランカップリング剤を用いた。
接着性官能基が形成されていない帯状の箇所の幅、すなわち非接着領域の幅を500μm、750μm、1000μm、1250μm、1500μmと変更したこと以外は、実施例1と同様にして、実施例2の各積層体を得た。架橋剤濃度はモノマーに対して0.1mol%とした。
モノマー溶液に含まれるモノマーとして、アクリルアミドとアクリル酸とを併用したこと以外は、実施例1と同様にして実施例3の積層体を得た。架橋剤濃度はモノマーに対して0.1mol%とした。用いたモノマー溶液は、アクリルアミドの濃度が3.8mol/L、アクリル酸の濃度が0.2mol/Lであり、光重合開始剤の濃度がモノマーに対して0.1mol%であった。
モノマー溶液に含まれるモノマーとして、アクリルアミドの代わりにイソプロピルアクリルアミドを用い、モノマー溶液をジメチルスルホキシド溶液としたこと以外は、実施例1と同様にして実施例4の積層体を得た。架橋剤濃度はモノマーに対して0.1mol%とした。
得られたハイドロゲル層は、温度変化に応答する刺激応答性のハイドロゲルを形成材料とする層である。
実施例4の方法で作成した積層体の基材の裏面側に、アルミホイルで作成した幅2mmの金属パターンを接着剤で張り付け、形状制御デバイスを作成した。金属パターンは、上記実施形態における電極に該当する。
上述の第2の製造方法を用いて、積層体を作製した。
まず、基材であるポリジメチルシロキサンシートを洗浄し、表面を完全に乾燥させた。用いたPDMSシートの厚みは1mmであった。ポリジメチルシロキサンシートは、以下、「PDMSシート」と称する。
さらに、図28に示すように、実施例6の積層体を、積層体に形成された非接着領域の延在方向の両端側で把持し、ハイドロゲル層20が形成されている面が凹となるように応力Fを加えると、積層体全体が湾曲する。このとき、ハイドロゲル層20には引っ張り応力が加わり、管路1xが伸長された。
Claims (7)
- 基材と、
ハイドロゲルを形成材料とし前記基材の一面に設けられたハイドロゲル層と、を有し、
前記基材と前記ハイドロゲル層との界面には、前記基材と前記ハイドロゲル層とが接着する接着領域と、前記基材と前記ハイドロゲル層とが接着しない非接着領域と、が形成されている積層体。 - 前記非接着領域は、前記一面において帯状に設けられ、
前記接着領域は、前記非接着領域の延在方向の両側に設けられている請求項1に記載の積層体。 - 前記ハイドロゲル層の形成材料は、刺激応答性ハイドロゲルである請求項1または2に記載の積層体。
- 基材の一面に接着性官能基のパターンを形成する工程と、
前記接着性官能基のパターンを覆って、ハイドロゲルの前駆体を含む前駆体溶液を塗布する工程と、
前記前駆体を重合させる工程と、を含み、
前記前駆体は、前記接着性官能基と重合可能な官能基を有する積層体の製造方法。 - 基材の一面に重合開始剤の層を形成する工程と、
前記層を覆ってハイドロゲルの前駆体を含む前駆体溶液を塗布する工程と、
所定のパターン形状に前記重合開始剤を反応させて前記前駆体を重合させる工程と、を含む積層体の製造方法。 - 基材の一面にゲル陥入性高分子のパターンを形成する工程と、
前記パターンを覆って、ハイドロゲルを形成材料とするシート材を配置し、前記シート材と前記ゲル陥入性高分子とを接触させる工程と、を含む積層体の製造方法。 - 請求項3に記載の積層体と、
刺激応答性ハイドロゲルが反応する刺激を前記ハイドロゲル層に入力する入力部と、を有する形状制御デバイス。
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