JP5665332B2 - 複合粒子の製造方法 - Google Patents
複合粒子の製造方法 Download PDFInfo
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- JP5665332B2 JP5665332B2 JP2010052936A JP2010052936A JP5665332B2 JP 5665332 B2 JP5665332 B2 JP 5665332B2 JP 2010052936 A JP2010052936 A JP 2010052936A JP 2010052936 A JP2010052936 A JP 2010052936A JP 5665332 B2 JP5665332 B2 JP 5665332B2
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- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 2
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- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
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- ROPDWRCJTIRLTR-UHFFFAOYSA-L calcium metaphosphate Chemical compound [Ca+2].[O-]P(=O)=O.[O-]P(=O)=O ROPDWRCJTIRLTR-UHFFFAOYSA-L 0.000 description 1
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- RLGQACBPNDBWTB-UHFFFAOYSA-N cetyltrimethylammonium ion Chemical class CCCCCCCCCCCCCCCC[N+](C)(C)C RLGQACBPNDBWTB-UHFFFAOYSA-N 0.000 description 1
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- YRIUSKIDOIARQF-UHFFFAOYSA-N dodecyl benzenesulfonate Chemical compound CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 YRIUSKIDOIARQF-UHFFFAOYSA-N 0.000 description 1
- MOTZDAYCYVMXPC-UHFFFAOYSA-N dodecyl hydrogen sulfate Chemical compound CCCCCCCCCCCCOS(O)(=O)=O MOTZDAYCYVMXPC-UHFFFAOYSA-N 0.000 description 1
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- 229940052308 general anesthetics halogenated hydrocarbons Drugs 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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Images
Description
(1)熱可塑性樹脂と相溶性のない分散媒中に、熱可塑性樹脂及び少なくとも1種の無機粒子を添加する工程、
(2)工程(1)で得られる混合物を前記熱可塑性樹脂の融点以上の温度に加熱して混合し、熱可塑性樹脂粒子の表面に、無機粒子が吸着した複合粒子を含む分散液を形成する工程、及び
(3)工程(2)における複合粒子を含む分散液を冷却し、分散液中の複合粒子を固化する工程
を含む複合粒子の製造方法。
以下に実施例及び比較例を示して、本発明をさらに具体的に説明する。なお、本発明は、以下の実施形態に限定されるものではない。
実施例1
1.低結晶性ハイドロキシアパタイト粒子の調製
球状の形態を有するハイドロキシアパタイトナノ粒子を以下に示す湿式法で合成した。なお、Ca(NO3)24H2O、及び(NH4)2HPO4はナカライテスク(株)製のものを用い、25%アンモニア水は和光純薬工業(株)製のものを用い、純水としてMilli-Q waterを使用した。
前記「1.低結晶性ハイドロキシアパタイト粒子の調製」によって得られた低結晶性ハイドロキシアパタイトナノ粒子0.01gを含む水25mLを超音波バス中に15分浸漬することで低結晶性ハイドロキシアパタイトナノ粒子水分散体を調製した。
1.高結晶性ハイドロキシアパタイト粒子
高結晶性ハイドロキシアパタイト粒子として、(株)ソフセラ製のnano−SHAp MHS−00405(平均粒子径35〜50nm)を用いた。
前記、高結晶性ハイドロキシアパタイトナノ粒子0.2gを水100mLに加えて、超音波バス中に15分浸漬することで高結晶性ハイドロキシアパタイトナノ粒子水分散体を調製した。
融点が約136℃であるラクチド−εカプロラクトン共重合体(ラクチド/εカプロラクトン=50/50(モル比);重量平均分子量=280,000)及び純水150mLを耐圧容器に加え、同耐圧容器を180℃のオイルバス中に浸漬し、耐圧容器中の内容物を1時間撹拌した。その後、耐圧容器をオイルバスから取り出し、1時間空冷した。なお、耐圧容器として耐圧硝子工業(株)製TPR-1型ポータブルリアクターを使用し、回転数830rpmにて撹拌を行った。
1.高結晶性ハイドロキシアパタイト粒子
実施例2と同様に、高結晶性ハイドロキシアパタイト粒子として、(株)ソフセラ製nano−HSAp MHS−00405(平均粒子径35〜50nm)を用いた。
前記、高結晶性ハイドロキシアパタイトナノ粒子0.1gを水150mLに加えて、超音波バス中に15分浸漬することで高結晶性ハイドロキシアパタイトナノ粒子水分散体を調製した。
実施例3の「2.複合粒子の製造」において、オイルバスの温度を180℃に代えた以外は、実施例3と同様の方法によって複合粒子を製造した。得られた複合粒子について、実施例3と同様の方法にて、外観、円相当径及び円形度を測定し評価した。得られた粉体の外観写真を図7に、円相当径の結果を図11に、円形度の結果を図12に示す。
比較例2
ラクチド-εカプロラクトン共重合体(ラクチド/εカプロラクトン=50/50(モル比);重量平均分子量=280,000)をそのまま、実施例3と同様の方法にて、外観、円相当径及び円形度を測定し評価した。得られた粉体の外観写真を図8に、円相当径の結果を図11に、円形度の結果を図12に示す。
実施例3の「2.複合粒子の製造」において、オイルバスの温度を100℃に代えた以外は、実施例3と同様の方法によって複合粒子を製造した。得られた複合粒子について、実施例3と同様の方法にて、外観、円相当径及び円形度を測定し、評価した。得られた粉体の外観写真を図9に、円相当径の結果を図11に、円形度の結果を図12に示す。
実施例3の「2.複合粒子の製造」において、オイルバスの温度を130℃に代えた以外は、実施例3と同様の方法によって複合粒子を製造した。得られた複合粒子について、実施例3と同様の方法にて、外観、円相当径及び円形度を測定し、評価した。得られた粉体の外観写真を図10に、円相当径の結果を図11に、円形度の結果を図12に示す。
Claims (12)
- 熱可塑性樹脂粒子の表面に、無機粒子が吸着した複合粒子の製造方法であって、
(1)熱可塑性樹脂と相溶性のない分散媒中に、熱可塑性樹脂及び少なくとも1種の無機粒子を添加する工程、
(2)工程(1)で得られる混合物を前記熱可塑性樹脂の融点以上の温度に加熱して混合し、熱可塑性樹脂粒子の表面に、無機粒子が吸着した複合粒子を含む分散液を形成する工程、及び
(3)工程(2)における複合粒子を含む分散液を冷却し、分散液中の複合粒子を固化する工程
を含み、
熱可塑性樹脂がポリエステルであり、
無機粒子がリン酸カルシウムであり、
熱可塑性樹脂と相溶性のない分散媒が水、又は水を主成分とする混合分散媒である
複合粒子の製造方法。 - 工程(1)が、熱可塑性樹脂と相溶性のない分散媒中に少なくとも1種の無機粒子を分散させ、少なくとも1種の無機粒子を分散させた分散媒中に、さらに熱可塑性樹脂を添加する工程である請求項1に記載の複合粒子の製造方法。
- 熱可塑性樹脂の融点が0〜300℃である請求項1又は2に記載の複合粒子の製造方法。
- 工程(3)における冷却温度が、熱可塑性樹脂の融点以下であって、分散媒の凝固点以上の温度である請求項1〜3のいずれかに記載の複合粒子の製造方法。
- 工程(3)における冷却温度が−120〜+50℃である請求項1〜4のいずれかに記載の複合粒子の製造方法。
- 熱可塑性樹脂と相溶性のない分散媒が水である請求項1〜5のいずれかに記載の複合粒子の製造方法。
- 分散媒が水を主成分とする混合分散媒である請求項1〜5のいずれかに記載の複合粒子の製造方法。
- 熱可塑性樹脂がポリ-ε-カプロラクトン、ポリラクチド、ラクチド-ε-カプロラクトン共重合体、ラクチド-グリコリド共重合体、ポリグリコリド、グリコリド-ε-カプロラクトン共重合体及びポリジオキサノンよりなる群から選ばれる少なくとも1種の重合体である請求項1〜7のいずれかに記載の複合粒子の製造方法。
- 無機粒子の平均粒子径が10〜1000nmである請求項1〜8のいずれかに記載の複合粒子の製造方法。
- 無機粒子がハイドロキシアパタイトである請求項1〜9のいずれかに記載の複合粒子の製造方法。
- 該複合粒子の平均粒子径が0.01〜2,000μmである請求項1〜10のいずれかに記載の複合粒子の製造方法。
- 工程(1)で得られる混合物中に生態への影響が懸念される有機溶剤を含まず、工程(1)において界面活性剤及び分散安定剤を使用しない請求項1〜11のいずれかに記載の複合粒子の製造方法。
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