JP6945966B2 - カプセル化触媒及び集束超音波を使用した急速硬化接着剤 - Google Patents
カプセル化触媒及び集束超音波を使用した急速硬化接着剤 Download PDFInfo
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- JP6945966B2 JP6945966B2 JP2016053254A JP2016053254A JP6945966B2 JP 6945966 B2 JP6945966 B2 JP 6945966B2 JP 2016053254 A JP2016053254 A JP 2016053254A JP 2016053254 A JP2016053254 A JP 2016053254A JP 6945966 B2 JP6945966 B2 JP 6945966B2
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Description
マイクロフリューダイザを介して2つのランにより(by two runs)、8gのNaOH(0.01M)、2gのジメチルテトラデシルアミン(DMTDA)及び0.02gの臭化セチルトリメチルアンモニウム(CTAB)を処理することによって、水中油型エマルションが調製された。形成されたエマルションが45分間、撹拌棒により高速で撹拌され、他方で、50mLの水の中の200mgのポリ(スチレンスルホナート)(PSS)が、シリンジポンプによりエマルションに液滴で加えられた。カプセルの形成は、光学顕微鏡により確認された。
ポリ(カプロラクトン)シェル材料(1g)が、40mLのジクロロメタンに溶解された。1.5gのNaOH(0.01M)溶液を0.03gのドデシルベンゼンスルホン酸ナトリウム(SDBS)、及び1.5gのトリエチレンテトラミンと混合することによって、内側水相が調製された。内側水相が油相に加えられ、生じた混合物が、15分間、1900rpmで分散ディスクによりかき混ぜられた。次に、第1のエマルションが、水中のSDBSの0.16wt.%の溶液250mLに加えられ、撹拌棒によってかき混ぜられた。溶液は、硬質ポリ(カプロラクトン)シェルを残した状態でジクロロメタンが蒸発するまでおよそ6時間、40〜45℃で維持された。カプセルの形成は、光学顕微鏡により確認された。様々な厚さのシェル壁を作るために、後に続く実験ではポリ(カプロラクトン)の量を変えた。
20gのジメチルパラトルイジン(DMPT)、15.94gのペンタエリスリトールテトラキス(3−メルカプト−プロピオン酸)(PTMP)、及び11.85gのトリメチロールプロパントリアクリレート(TMPTA)から成る内側油相が混合され、30分間、2100rpmで分散ディスクにより、脱イオン水の中の1.28wt.%のポリ(ビニールアルコール)500mLに浮遊させた。次いで、分散ディスク速度を1700rpmに下げ、0.9mLのオクチルアミンが加えられ、1時間かき混ぜ続けることが許可された。カプセルの形成は、光学顕微鏡により確認された。
ビーカーの中で、プルロニックP123(0.08g)が、NaOH(0.1MのNaOH、50mL)含有の水に分散された。プルロニックP123が完全に溶解するまで、溶液が、一定に撹拌されながら35℃まで加熱された。次に、N,N−ジメチルテトラデシルアミン(tetradeclyamine)(5g、20ミリモル)が溶液に加えられ、安定したエマルションを形成するために3時間、連続的に撹拌された。別のビーカーの中で、オルトケイ酸テトラエチル(TEOS、5g、24ミリモル)がHCl水溶液(pH2.45)に加えられ、均一の溶液が得られるまで35℃で撹拌された。次に、このビーカーの内容物が、エマルション溶液液滴に加えられ、24時間の撹拌が許可され、マイクロカプセルアセンブリが完成した。溶液表面の白い沈殿物を集め、すすぎ、乾燥が許可された。水より密度が低いN,N−ジメチルテトラデシルアミンは、カプセル化の後、表面にあると思われる。
先ほど概要が述べられた各方法により調製されたカプセルは、多様な低粘度溶媒(メタノール、アセトン、及び水)の中を浮遊し、低周波超音波を受けた。カプセル破損が、比色分析(ニンヒドリン試験)、pH分析、及び光学顕微鏡法によってモニタリングされた。更に、溶媒蒸発及び界面重合によって調製されたカプセルが分離され、エポキシ/チオール樹脂に一体化され、超音波及び圧力の両方によって分散された。
Araldite MY 721とAraldite EPN 9850の割合が3:1の混合物1.25g、1.25gのPTMP、2.5gのアルミニウム粉末(Toyal 5621)及び0.25gのDMTDA(1%w/wを使用してカプセル化DMTDA用に調節された量)をまとめ、遠心ミキサーにより混合することによって、アルミニウム充填接着剤ペーストが調製された。硬化が開始すると、ペーストがアルミニウム基板上に約1/8インチの厚さの細片に加えられ、ショアD硬度検査が行われた。1MHzの集束超音波プローブ(Precision Acoustics、Dorchester UK)が、プローブヘッドと炭素繊維(CFRP)裏側との間で特注のポリマーレンズを使用して、CFRPパネル(1.52mmの厚さ)の裏側に加えられた。音響ゲルが、プローブヘッドとサンプルとの間の空気間隙を除去するために加えられた。CFRPパネルが表面で露出され、1MHzの正弦波電圧信号(80Vのピークツーピーク(peak to peak))が60秒間印加された状態で、プローブヘッドが水に浸された。
Claims (14)
- 未硬化樹脂系接着剤を形成するために樹脂系化合物(22、32、42、52)をカプセル化触媒(26、36、46、54)と混合するステップと;
超音波エネルギー源(27、37、47、56)から、0.5MHzから50MHzまでの範囲であって、前記カプセル化触媒のシェルの固有振動数に対応する振動数を有する超音波エネルギーを、0.1インチ(2.54mm)から0.25インチ(6.35mm)までの厚さの固体基板を通して、前記未硬化樹脂系接着剤に方向付けるステップと;
を含む、接着剤を形成するための方法(20、30、40、50)。 - 前記樹脂系化合物は、エポキシ樹脂系化合物を含み、前記カプセル化触媒は、三塩化ホウ素メチルアミン、三塩化ホウ素エチルアミン、及び同族体、三フッ化ホウ素メチルアミン、三フッ化ホウ素エチルアミン及び同族体、三フッ化ホウ素ジメチルアミン、三フッ化ホウ素ジエチルアミン、及び同族体、三フッ化ホウ素トリメチルアミン、三フッ化ホウ素トリエチルアミン、及び同族体、三フッ化ホウ素ピペラジン、三フッ化ホウ素ヘキシルアミン、並びにそれらの組み合わせから成るグループから選択された化合物である、請求項1に記載の方法。
- 前記樹脂系化合物は、ビスフェノールAのジグリシジルエーテル;ビスフェノールFのジグリシジルエーテル;N,N,N’,N’−テトラジグリシジル−4,4’−ジアミノフェニルメタン;p−アミノフェノールトリグリシジルエーテル;エポキシフェノールノボラック樹脂;エポキシクレゾールノボラック樹脂;1,3,5−トリグリシジルイソシアヌレート;トリス(2,3−エポキシプロピル)イソシアヌレート(及びイソシアヌレート群);グリセロールジグリシジルエーテル;トリメチロールプロパントリグリシジルエーテル、並びにそれらの組み合わせを含むグループから選択されたエポキシ樹脂系化合物である、請求項1に記載の方法。
- 前記未硬化樹脂系接着剤を形成するために前記樹脂系化合物を前記カプセル化触媒と混合する前記ステップが、チオール系硬化剤を前記エポキシ樹脂系化合物と混合することを更に含み、前記チオール系硬化剤が、ペンタエリスリトールテトラキス(3−メルカプトプロピオン酸);トリメチロールプロパントリス(3−メルカプトプロピオン酸);1,3,4−チアジアゾール−2,5−ジチオール;ポリ(エチレン グリコール)ジチオール;トルエンジチオール;ベンゼンジチオール;1,2−エタンジチオール(及びMW増加型アルカンジチオール);トリス[2−(3−メルカプトプロピオニルオキシ)エチル]イソシアヌレート(及びイソシアヌレート骨格上にグラフトされた他のポリオール)、及びそれらの組み合わせから成るグループから選択される、請求項3に記載の方法。
- 前記カプセル化触媒が、N,Nジメチルドデシルアミン及び同族体;(1,8−ジアザビシクロウンデカ−7−エン);(1,5−ジアザビシクロ[4,3,0]非−5−エン)、トリエンタノールアミン、ピペラジン、ジメチルイミダゾール、1−メチルイミダゾール;ノニルフェノール;1−(2−アミノエチル)ピペラジン、及びそれらの組み合わせから成るグループから選択される、請求項4に記載の方法。
- 前記樹脂系化合物が、アクリル樹脂系化合物を含み、
前記未硬化樹脂系接着剤を形成するために前記樹脂系化合物を前記カプセル化触媒と混合する前記ステップが、チオール系硬化剤(24、34、44)を前記樹脂系化合物及びカプセル化された化合物と混合することを更に含み、
前記チオール系硬化剤が、ペンタエリスリトールテトラキス(3−メルカプトプロピオン酸);トリメチロールプロパントリス(3−メルカプトプロピオン酸);1,3,4−チアジアゾール−2,5−ジチオール;ポリ(エチレングリコール)ジチオール;トルエンジチオール;ベンゼンジチオール;1,2−エタンジチオール(及びMW増加型アルカンジチオール);トリス[2−(3−メルカプトプロピオニルオキシ)エチル]イソシアヌレート(及びイソシアヌレート骨格上にグラフトされた他のポリオール)、並びにそれらの組み合わせから成るグループから選択される、請求項1に記載の方法。 - 少なくとも:
前記カプセル化触媒が、脂肪族第1級アミン、脂肪族第2級アミン、及びそれらの組み合わせから成るグループから選択される;又は
前記アクリル樹脂系化合物が、モノアクリレート、ジアクリレート、トリアクリレート、テトラアクリレート、ペンタアクリレート及びそれらの組み合わせを含むグループから選択される、請求項6に記載の方法。 - 未硬化接着材料であって、前記未硬化接着材料は、混合物の中に、
樹脂系化合物(22、32、42、52)と;カプセル化触媒(26、36、46、54)と
を含み、
前記触媒が、シェル内部でカプセル化され、前記シェルが、1ミクロンから1000ミクロンまでの平均シェル直径、及び前記シェル直径の1%から10%までの平均シェル壁厚を有しており、
所定量のエネルギーが超音波エネルギー源(27、37、47、56)から、0.1インチ(2.54mm)から0.25インチ(6.35mm)までの厚さの固体基板を通して前記シェルによって受け取られると、前記シェルが破損し、
前記所定量のエネルギーが、0.5MHzから50MHzまでの範囲であって、前記カプセル化触媒のシェルの固有振動数に対応する振動数を有する超音波エネルギーであり、
オンデマンドで硬化可能である、未硬化接着材料。 - 前記樹脂系化合物が、エポキシ樹脂系化合物を含み、前記カプセル化触媒が、三塩化ホウ素メチルアミン、三塩化ホウ素エチルアミン、及び同族体、三フッ化ホウ素メチルアミン、三フッ化ホウ素エチルアミン及び同族体、三フッ化ホウ素ジメチルアミン、三フッ化ホウ素ジエチルアミン、及び同族体、三フッ化ホウ素トリメチルアミン、三フッ化ホウ素トリエチルアミン、及び同族体、三フッ化ホウ素ピペラジン、三フッ化ホウ素ヘキシルアミン、並びにそれらの組み合わせから成るグループから選択された化合物である、請求項8に記載の接着材料。
- 前記樹脂系化合物が、ビスフェノールAのジグリシジルエーテル;ビスフェノールFのジグリシジルエーテル;N,N,N’,N’−テトラジグリシジル−4,4’−ジアミノフェニルメタン;p−アミノフェノールトリグリシジルエーテル;エポキシフェノールノボラック樹脂;エポキシクレゾールノボラック樹脂;1,3,5−トリグリシジルイソシアヌレート;トリス(2,3−エポキシプロピル)イソシアヌレート(及びイソシアヌレート群);グリセロールジグリシジルエーテル;トリメチロールプロパントリグリシジルエーテル、並びにそれらの組み合わせを含むグループから選択されたエポキシ樹脂系化合物を含む、請求項8に記載の接着材料。
- 前記エポキシ樹脂系化合物と混合されたチオール系硬化剤(24、34、44)を更に含み、前記チオール系硬化剤が:ペンタエリスリトールテトラキス(3−メルカプトプロピオン酸);トリメチロールプロパントリス(3−メルカプトプロピオン酸);1,3,4−チアジアゾール−2,5−ジチオール;ポリ(エチレングリコール)ジチオール;トルエンジチオール;ベンゼンジチオール;1,2−エタンジチオール(及びMW増加型アルカンジチオール);トリス[2−(3−メルカプトプロピオニルオキシ)エチル]イソシアヌレート(及びイソシアヌレート骨格上にグラフトされた他のポリオール)、並びにそれらの組み合わせから成るグループから選択される、請求項10に記載の接着材料。
- 前記カプセル化触媒が、N,Nジメチルドデシル アミン及び同族体;(1,8−ジアザビシクロウンデカ−7−エン);(1,5−ジアザビシクロ[4,3,0]非−5−エン、トリエンタノールアミン、ピペラジン、ジメチルイミダゾール、1−メチルイミダゾール;ノニルフェノール;1−(2−アミノエチル)ピペラジン、並びにそれらの組み合わせから成るグループから選択される、請求項11に記載の接着材料。
- 前記樹脂系化合物が、アクリル樹脂系化合物を含み、チオール系硬化剤が、前記樹脂系化合物及びカプセル化された化合物と混合され、
前記チオール系硬化剤が、ペンタエリスリトールテトラキス(3−メルカプトプロピオン酸);トリメチロールプロパントリス(3−メルカプトプロピオン酸);1,3,4−チアジアゾール−2,5−ジチオール;ポリ(エチレングリコール)ジチオール;トルエンジチオール;ベンゼンジチオール;1,2−エタンジチオール(及びMW増加型アルカンジチオール);トリス[2−(3−メルカプトプロピオニルオキシ)エチル]イソシアヌレート(及びイソシアヌレート骨格上にグラフトされた他のポリオール)、並びにそれらの組み合わせから成るグループから選択される、請求項8に記載の接着材料。 - 少なくとも:
前記カプセル化触媒が、脂肪族第1級アミン、脂肪族第2級アミン、及びそれらの組み合わせから成るグループから選択され;又は
前記アクリル樹脂系化合物が、モノアクリレート、ジアクリレート、トリアクリレート、テトラアクリレート、ペンタアクリレート及びそれらの組み合わせを含むグループから選択される、請求項13に記載の接着材料。
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| US14/667,220 | 2015-03-24 |
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| US11673352B2 (en) * | 2016-09-20 | 2023-06-13 | United States Of America As Represented By The Administrator Of Nasa | Automated wave guide system for in-process monitoring of carbon fiber reinforced polymer (CFRP) composite laminates with hanning window tone-bursts of center frequencies from 100-225 kHz and 100-350 kHz |
| CA3036115A1 (en) * | 2016-10-07 | 2018-04-12 | Multimaterial-Welding Ag | Method of activating adhesives |
| DE202017107320U1 (de) * | 2017-11-30 | 2018-01-17 | Airbus Operations Gmbh | Toleranzkompensations- und Dichtmittel |
| US12492302B2 (en) | 2019-09-05 | 2025-12-09 | Agency For Science, Technology And Research | Kit for producing a polyolefin composite |
| EP4058526A1 (en) * | 2019-11-15 | 2022-09-21 | Zephyros, Inc. | Methods and compositions for adhering to low surface energy materials |
| US11486242B2 (en) | 2021-01-27 | 2022-11-01 | Saudi Arabian Oil Company | Methods for targeted chemical treatment of well bores |
| US12415942B2 (en) | 2021-10-22 | 2025-09-16 | Nano And Advanced Materials Institute Limited | Light or heat triggered frontally cured cure-on-demand adhesives kit |
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