Colloidal silica bearing thin polyacrylate coat: A facile inorganic modifier of acrylic emulsions for fabricating hybrid films with least aggregation of silica nanoparticles
•Colloidal silica particles covered with thin polyacrylate coat (PreEm) were prepared.•STEM analysis supported the presence of the coat layer (1–3 nm in thickness).•Hybrid emulsions were prepared by mixing PreEm with acrylic emulsions (AcEm).•The hybrid emulsions gave transparent coating films at hi...
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| Veröffentlicht in: | Progress in organic coatings 2019-03, Vol.128, p.11-20 |
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| creator | Arai, Koji Mizutani, Tsutomu Miyamoto, Masatoshi Kimura, Yoshiharu Aoki, Takashi |
| description | •Colloidal silica particles covered with thin polyacrylate coat (PreEm) were prepared.•STEM analysis supported the presence of the coat layer (1–3 nm in thickness).•Hybrid emulsions were prepared by mixing PreEm with acrylic emulsions (AcEm).•The hybrid emulsions gave transparent coating films at high silica content.•The hardness of the PreEm/ AcEm films increased with increasing the silica content.
Novel nano-composite emulsions consisting of colloidal silica particles covered with thin polyacrylate coat (PreEm) were successfully prepared with the aid of a nonionic surfactant having a low cloud point (Tcp = 40 °C). This nonionic surfactant first deposited on the surface of colloidal silica particles above its Tcp to provide the sites for adsorption and the following polymerization of acrylic monomer. Scanning transmission electron microscopy of the colloidal particles obtained after the polymerization indicated the presence of very thin coat layer of polyacrylate (c.a., 1–3 nm nm in thickness) around silica nanoparticles. These PreEm particles were readily incorporated into the ordinary acrylic emulsions (AcEm) to obtain silica/ polyacrylate mixed emulsions (PreEm/ AcEm). It was revealed that the mixed emulsions can give transparent coating films at a silica/polyacrylate ratio below 150/100 in which the colloidal particles were distributed in the polymer matrix without aggregation. This morphology was in sharp contrast with the particle aggregation morphologies shown by the films obtained from the naked colloidal silica-AcEm mixed emulsion and the conventional nanocomposite emulsion consisting of silica particles covered with thick polyacrylate coat. The PreEm/ AcEm films exhibited increased hardness with increasing the silica contents to 150%. These data supported the effectiveness of PreEm in controlling the properties of silica-polyacrylate hybrid films. |
| doi_str_mv | 10.1016/j.porgcoat.2018.12.002 |
| format | Article |
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Novel nano-composite emulsions consisting of colloidal silica particles covered with thin polyacrylate coat (PreEm) were successfully prepared with the aid of a nonionic surfactant having a low cloud point (Tcp = 40 °C). This nonionic surfactant first deposited on the surface of colloidal silica particles above its Tcp to provide the sites for adsorption and the following polymerization of acrylic monomer. Scanning transmission electron microscopy of the colloidal particles obtained after the polymerization indicated the presence of very thin coat layer of polyacrylate (c.a., 1–3 nm nm in thickness) around silica nanoparticles. These PreEm particles were readily incorporated into the ordinary acrylic emulsions (AcEm) to obtain silica/ polyacrylate mixed emulsions (PreEm/ AcEm). It was revealed that the mixed emulsions can give transparent coating films at a silica/polyacrylate ratio below 150/100 in which the colloidal particles were distributed in the polymer matrix without aggregation. This morphology was in sharp contrast with the particle aggregation morphologies shown by the films obtained from the naked colloidal silica-AcEm mixed emulsion and the conventional nanocomposite emulsion consisting of silica particles covered with thick polyacrylate coat. The PreEm/ AcEm films exhibited increased hardness with increasing the silica contents to 150%. These data supported the effectiveness of PreEm in controlling the properties of silica-polyacrylate hybrid films.</description><identifier>ISSN: 0300-9440</identifier><identifier>EISSN: 1873-331X</identifier><identifier>DOI: 10.1016/j.porgcoat.2018.12.002</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Agglomeration ; Coating ; Coating film ; Colloidal silica particles ; Colloids ; Emulsions ; Hardness ; Hybrid emulsion ; Morphology ; Nanocomposites ; Nanoparticles ; Particulate composites ; Polymerization ; Scanning electron microscopy ; Scanning transmission electron microscopy ; Silica ; Silicon dioxide ; Surfactants ; Thickness ; Thin polyacrylate coat ; Transmission electron microscopy ; Transparency</subject><ispartof>Progress in organic coatings, 2019-03, Vol.128, p.11-20</ispartof><rights>2018 Elsevier B.V.</rights><rights>Copyright Elsevier BV Mar 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c377t-8fc39d52a4448930d0f08ba91a649f7794c5e8b6b461df2b0233713f75b67aa63</citedby><cites>FETCH-LOGICAL-c377t-8fc39d52a4448930d0f08ba91a649f7794c5e8b6b461df2b0233713f75b67aa63</cites><orcidid>0000-0003-4431-0193</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0300944018309068$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Arai, Koji</creatorcontrib><creatorcontrib>Mizutani, Tsutomu</creatorcontrib><creatorcontrib>Miyamoto, Masatoshi</creatorcontrib><creatorcontrib>Kimura, Yoshiharu</creatorcontrib><creatorcontrib>Aoki, Takashi</creatorcontrib><title>Colloidal silica bearing thin polyacrylate coat: A facile inorganic modifier of acrylic emulsions for fabricating hybrid films with least aggregation of silica nanoparticles</title><title>Progress in organic coatings</title><description>•Colloidal silica particles covered with thin polyacrylate coat (PreEm) were prepared.•STEM analysis supported the presence of the coat layer (1–3 nm in thickness).•Hybrid emulsions were prepared by mixing PreEm with acrylic emulsions (AcEm).•The hybrid emulsions gave transparent coating films at high silica content.•The hardness of the PreEm/ AcEm films increased with increasing the silica content.
Novel nano-composite emulsions consisting of colloidal silica particles covered with thin polyacrylate coat (PreEm) were successfully prepared with the aid of a nonionic surfactant having a low cloud point (Tcp = 40 °C). This nonionic surfactant first deposited on the surface of colloidal silica particles above its Tcp to provide the sites for adsorption and the following polymerization of acrylic monomer. Scanning transmission electron microscopy of the colloidal particles obtained after the polymerization indicated the presence of very thin coat layer of polyacrylate (c.a., 1–3 nm nm in thickness) around silica nanoparticles. These PreEm particles were readily incorporated into the ordinary acrylic emulsions (AcEm) to obtain silica/ polyacrylate mixed emulsions (PreEm/ AcEm). It was revealed that the mixed emulsions can give transparent coating films at a silica/polyacrylate ratio below 150/100 in which the colloidal particles were distributed in the polymer matrix without aggregation. This morphology was in sharp contrast with the particle aggregation morphologies shown by the films obtained from the naked colloidal silica-AcEm mixed emulsion and the conventional nanocomposite emulsion consisting of silica particles covered with thick polyacrylate coat. The PreEm/ AcEm films exhibited increased hardness with increasing the silica contents to 150%. These data supported the effectiveness of PreEm in controlling the properties of silica-polyacrylate hybrid films.</description><subject>Agglomeration</subject><subject>Coating</subject><subject>Coating film</subject><subject>Colloidal silica particles</subject><subject>Colloids</subject><subject>Emulsions</subject><subject>Hardness</subject><subject>Hybrid emulsion</subject><subject>Morphology</subject><subject>Nanocomposites</subject><subject>Nanoparticles</subject><subject>Particulate composites</subject><subject>Polymerization</subject><subject>Scanning electron microscopy</subject><subject>Scanning transmission electron microscopy</subject><subject>Silica</subject><subject>Silicon dioxide</subject><subject>Surfactants</subject><subject>Thickness</subject><subject>Thin polyacrylate coat</subject><subject>Transmission electron microscopy</subject><subject>Transparency</subject><issn>0300-9440</issn><issn>1873-331X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNqFkVFvFCEUhYmxiWvtX2hIfJ4RBnYYfLLZWG3SxBdNfCN3GJhlw8IIrGZ_VP-jjFuf-8QNOec7cA9Ct5S0lND-w6FdYpp1hNJ2hA4t7VpCuldoQwfBGsboz9doQxghjeScvEFvcz4QQnrG5AY97aL30U3gcXbeacCjgeTCjMveBbxEfwadzh6KwWvER3yHLWjnDXahxkJwGh_j5KwzCUeL_6nrnTmefHYxZGxjqpYxVXhZwftznSdsnT9m_MeVPfYGcsEwz8nMVRPDCnp-ToAQF0jFaW_yO3RlwWdz83xeox_3n7_vvjaP37487O4eG82EKM1gNZPTtgPO-SAZmYglwwiSQs-lFUJyvTXD2I-8p5PtRtIxJiizYjv2AqBn1-j9hbuk-OtkclGHeEqhRqqOSiKl2ApeVf1FpVPMORmrluSOkM6KErVWow7qfzVqrUbRTtVqqvHTxWjqH37XxamsnQnaTC4ZXdQU3UuIv_V4n1Q</recordid><startdate>20190301</startdate><enddate>20190301</enddate><creator>Arai, Koji</creator><creator>Mizutani, Tsutomu</creator><creator>Miyamoto, Masatoshi</creator><creator>Kimura, Yoshiharu</creator><creator>Aoki, Takashi</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><orcidid>https://orcid.org/0000-0003-4431-0193</orcidid></search><sort><creationdate>20190301</creationdate><title>Colloidal silica bearing thin polyacrylate coat: A facile inorganic modifier of acrylic emulsions for fabricating hybrid films with least aggregation of silica nanoparticles</title><author>Arai, Koji ; Mizutani, Tsutomu ; Miyamoto, Masatoshi ; Kimura, Yoshiharu ; Aoki, Takashi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c377t-8fc39d52a4448930d0f08ba91a649f7794c5e8b6b461df2b0233713f75b67aa63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Agglomeration</topic><topic>Coating</topic><topic>Coating film</topic><topic>Colloidal silica particles</topic><topic>Colloids</topic><topic>Emulsions</topic><topic>Hardness</topic><topic>Hybrid emulsion</topic><topic>Morphology</topic><topic>Nanocomposites</topic><topic>Nanoparticles</topic><topic>Particulate composites</topic><topic>Polymerization</topic><topic>Scanning electron microscopy</topic><topic>Scanning transmission electron microscopy</topic><topic>Silica</topic><topic>Silicon dioxide</topic><topic>Surfactants</topic><topic>Thickness</topic><topic>Thin polyacrylate coat</topic><topic>Transmission electron microscopy</topic><topic>Transparency</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Arai, Koji</creatorcontrib><creatorcontrib>Mizutani, Tsutomu</creatorcontrib><creatorcontrib>Miyamoto, Masatoshi</creatorcontrib><creatorcontrib>Kimura, Yoshiharu</creatorcontrib><creatorcontrib>Aoki, Takashi</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Progress in organic coatings</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Arai, Koji</au><au>Mizutani, Tsutomu</au><au>Miyamoto, Masatoshi</au><au>Kimura, Yoshiharu</au><au>Aoki, Takashi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Colloidal silica bearing thin polyacrylate coat: A facile inorganic modifier of acrylic emulsions for fabricating hybrid films with least aggregation of silica nanoparticles</atitle><jtitle>Progress in organic coatings</jtitle><date>2019-03-01</date><risdate>2019</risdate><volume>128</volume><spage>11</spage><epage>20</epage><pages>11-20</pages><issn>0300-9440</issn><eissn>1873-331X</eissn><abstract>•Colloidal silica particles covered with thin polyacrylate coat (PreEm) were prepared.•STEM analysis supported the presence of the coat layer (1–3 nm in thickness).•Hybrid emulsions were prepared by mixing PreEm with acrylic emulsions (AcEm).•The hybrid emulsions gave transparent coating films at high silica content.•The hardness of the PreEm/ AcEm films increased with increasing the silica content.
Novel nano-composite emulsions consisting of colloidal silica particles covered with thin polyacrylate coat (PreEm) were successfully prepared with the aid of a nonionic surfactant having a low cloud point (Tcp = 40 °C). This nonionic surfactant first deposited on the surface of colloidal silica particles above its Tcp to provide the sites for adsorption and the following polymerization of acrylic monomer. Scanning transmission electron microscopy of the colloidal particles obtained after the polymerization indicated the presence of very thin coat layer of polyacrylate (c.a., 1–3 nm nm in thickness) around silica nanoparticles. These PreEm particles were readily incorporated into the ordinary acrylic emulsions (AcEm) to obtain silica/ polyacrylate mixed emulsions (PreEm/ AcEm). It was revealed that the mixed emulsions can give transparent coating films at a silica/polyacrylate ratio below 150/100 in which the colloidal particles were distributed in the polymer matrix without aggregation. This morphology was in sharp contrast with the particle aggregation morphologies shown by the films obtained from the naked colloidal silica-AcEm mixed emulsion and the conventional nanocomposite emulsion consisting of silica particles covered with thick polyacrylate coat. The PreEm/ AcEm films exhibited increased hardness with increasing the silica contents to 150%. These data supported the effectiveness of PreEm in controlling the properties of silica-polyacrylate hybrid films.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.porgcoat.2018.12.002</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0003-4431-0193</orcidid></addata></record> |
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| subjects | Agglomeration Coating Coating film Colloidal silica particles Colloids Emulsions Hardness Hybrid emulsion Morphology Nanocomposites Nanoparticles Particulate composites Polymerization Scanning electron microscopy Scanning transmission electron microscopy Silica Silicon dioxide Surfactants Thickness Thin polyacrylate coat Transmission electron microscopy Transparency |
| title | Colloidal silica bearing thin polyacrylate coat: A facile inorganic modifier of acrylic emulsions for fabricating hybrid films with least aggregation of silica nanoparticles |
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