Aging of TiO2 nanocomposites used in sunscreen. Dispersion and fate of the degradation products in aqueous environment
Aging in water of a TiO2-based nanocomposite used in sunscreen cosmetics has been studied as a function of light and time. It consisted initially in a TiO2 core, coated with Al(OH)3 and polydimethylsiloxane (PDMS) layers. Size measurement, coating alteration, and surface charge were followed by lase...
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| Veröffentlicht in: | Environmental pollution (1987) 2010-12, Vol.158 (12), p.3482-3489 |
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| container_title | Environmental pollution (1987) |
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| creator | LABILLE, Jérôme JINGHUAN FENG BOTTA, Céline BORSCHNECK, Daniel SAMMUT, Magali CABIE, Martiane AUFFAN, Mélanie ROSE, Jérôme BOTTERO, Jean-Yves |
| description | Aging in water of a TiO2-based nanocomposite used in sunscreen cosmetics has been studied as a function of light and time. It consisted initially in a TiO2 core, coated with Al(OH)3 and polydimethylsiloxane (PDMS) layers. Size measurement, coating alteration, and surface charge were followed by laser diffraction, TEM/EDS, ICP-AES and electrophoretic mobility measurement. The nanocomposite rapidly underwent progressive dispersion in the aqueous phase, enabled by the dissolution of the PDMS layer. A stable suspension of colloidal byproducts from 50 to 700nm in size was formed. Their positively charged Al(OH)3 surface was evidenced with an isoelectric point around 7-8, controlling the dispersion stability. The critical coagulation concentrations measured with NaCl and CaCl2 was 2 OE 10 super(-2) and 8 OE 10 super(-3) M respectively. The presence of natural organic matter affected the colloidal stability according to the NOM/byproduct ratio. A 2 wt% ratio favored bridging flocculation, whereas a 20 wt% ratio induced sterical stabilization. Aging in aqueous conditions of TiO2 nanocomposite used in sunscreens induces rapid generation of nanometric byproducts remaining stable in suspension. |
| doi_str_mv | 10.1016/j.envpol.2010.02.012 |
| format | Article |
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The nanocomposite rapidly underwent progressive dispersion in the aqueous phase, enabled by the dissolution of the PDMS layer. A stable suspension of colloidal byproducts from 50 to 700nm in size was formed. Their positively charged Al(OH)3 surface was evidenced with an isoelectric point around 7-8, controlling the dispersion stability. The critical coagulation concentrations measured with NaCl and CaCl2 was 2 OE 10 super(-2) and 8 OE 10 super(-3) M respectively. The presence of natural organic matter affected the colloidal stability according to the NOM/byproduct ratio. A 2 wt% ratio favored bridging flocculation, whereas a 20 wt% ratio induced sterical stabilization. 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Dispersion and fate of the degradation products in aqueous environment</title><title>Environmental pollution (1987)</title><description>Aging in water of a TiO2-based nanocomposite used in sunscreen cosmetics has been studied as a function of light and time. It consisted initially in a TiO2 core, coated with Al(OH)3 and polydimethylsiloxane (PDMS) layers. Size measurement, coating alteration, and surface charge were followed by laser diffraction, TEM/EDS, ICP-AES and electrophoretic mobility measurement. The nanocomposite rapidly underwent progressive dispersion in the aqueous phase, enabled by the dissolution of the PDMS layer. A stable suspension of colloidal byproducts from 50 to 700nm in size was formed. Their positively charged Al(OH)3 surface was evidenced with an isoelectric point around 7-8, controlling the dispersion stability. The critical coagulation concentrations measured with NaCl and CaCl2 was 2 OE 10 super(-2) and 8 OE 10 super(-3) M respectively. The presence of natural organic matter affected the colloidal stability according to the NOM/byproduct ratio. A 2 wt% ratio favored bridging flocculation, whereas a 20 wt% ratio induced sterical stabilization. Aging in aqueous conditions of TiO2 nanocomposite used in sunscreens induces rapid generation of nanometric byproducts remaining stable in suspension.</description><subject>Applied sciences</subject><subject>Byproducts</subject><subject>Colloids</subject><subject>Continental interfaces, environment</subject><subject>Dispersions</subject><subject>Emission analysis</subject><subject>Environment and Society</subject><subject>Environmental Sciences</subject><subject>Exact sciences and technology</subject><subject>Inductively coupled plasma</subject><subject>Nanocomposites</subject><subject>Pollution</subject><subject>Sciences of the Universe</subject><subject>Silicone resins</subject><subject>Spectroscopy</subject><subject>Titanium dioxide</subject><issn>0269-7491</issn><issn>1873-6424</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNp9kc1u1DAURi0EEkPhDVh4g4BFwvVPnHg5aoEijdRNWVuO40w9ytjBNxmJt8fRVF2ysaXr8_ke6SPkI4OaAVPfTrWPlzlNNYcyAl4D46_IjnWtqJTk8jXZAVe6aqVmb8k7xBMASCHEjlz2xxCPNI30MTxwGm1MLp3nhGHxSFf0Aw2R4hrRZe9jTe8Czj5jSJHaONDRLn5LL0-eDv6Y7WCX7W3OaVjdglva_ll9WpEWyZBTPPu4vCdvRjuh__B835DfP74_3t5Xh4efv273h8qJDpZKyr6HjrV6aDX3jjVOjwBCdlZpK-TAWM-HXveyGaFvwUtVTt43gx4d720jbsjX679PdjJzDmeb_5pkg7nfH8w2A9Yw3Qh1YYX9fGWLezHGxZwDOj9NNm76pngoBo3ShfzyX5KplklopO4KKq-oywkx-_HFgoHZyjMncy3PbOUZ4EWJl9in5w0WnZ3GbKML-JLlQijOWyH-Ab46nJE</recordid><startdate>20101201</startdate><enddate>20101201</enddate><creator>LABILLE, Jérôme</creator><creator>JINGHUAN FENG</creator><creator>BOTTA, Céline</creator><creator>BORSCHNECK, Daniel</creator><creator>SAMMUT, Magali</creator><creator>CABIE, Martiane</creator><creator>AUFFAN, Mélanie</creator><creator>ROSE, Jérôme</creator><creator>BOTTERO, Jean-Yves</creator><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SU</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope><scope>7ST</scope><scope>7TV</scope><scope>7U7</scope><scope>SOI</scope><scope>1XC</scope><orcidid>https://orcid.org/0000-0002-4033-537X</orcidid><orcidid>https://orcid.org/0000-0003-4207-3526</orcidid><orcidid>https://orcid.org/0000-0003-0408-8524</orcidid><orcidid>https://orcid.org/0000-0002-6466-2391</orcidid><orcidid>https://orcid.org/0000-0003-1655-1977</orcidid><orcidid>https://orcid.org/0000-0003-3071-8147</orcidid></search><sort><creationdate>20101201</creationdate><title>Aging of TiO2 nanocomposites used in sunscreen. Dispersion and fate of the degradation products in aqueous environment</title><author>LABILLE, Jérôme ; JINGHUAN FENG ; BOTTA, Céline ; BORSCHNECK, Daniel ; SAMMUT, Magali ; CABIE, Martiane ; AUFFAN, Mélanie ; ROSE, Jérôme ; BOTTERO, Jean-Yves</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-44bb08179d792ec15c9f00348a69a34d11b2db9b45f0b70e46b702b5d9fc2ba53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Applied sciences</topic><topic>Byproducts</topic><topic>Colloids</topic><topic>Continental interfaces, environment</topic><topic>Dispersions</topic><topic>Emission analysis</topic><topic>Environment and Society</topic><topic>Environmental Sciences</topic><topic>Exact sciences and technology</topic><topic>Inductively coupled plasma</topic><topic>Nanocomposites</topic><topic>Pollution</topic><topic>Sciences of the Universe</topic><topic>Silicone resins</topic><topic>Spectroscopy</topic><topic>Titanium dioxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>LABILLE, Jérôme</creatorcontrib><creatorcontrib>JINGHUAN FENG</creatorcontrib><creatorcontrib>BOTTA, Céline</creatorcontrib><creatorcontrib>BORSCHNECK, Daniel</creatorcontrib><creatorcontrib>SAMMUT, Magali</creatorcontrib><creatorcontrib>CABIE, Martiane</creatorcontrib><creatorcontrib>AUFFAN, Mélanie</creatorcontrib><creatorcontrib>ROSE, Jérôme</creatorcontrib><creatorcontrib>BOTTERO, Jean-Yves</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Environmental Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Environment Abstracts</collection><collection>Pollution Abstracts</collection><collection>Toxicology Abstracts</collection><collection>Environment Abstracts</collection><collection>Hyper Article en Ligne (HAL)</collection><jtitle>Environmental pollution (1987)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>LABILLE, Jérôme</au><au>JINGHUAN FENG</au><au>BOTTA, Céline</au><au>BORSCHNECK, Daniel</au><au>SAMMUT, Magali</au><au>CABIE, Martiane</au><au>AUFFAN, Mélanie</au><au>ROSE, Jérôme</au><au>BOTTERO, Jean-Yves</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Aging of TiO2 nanocomposites used in sunscreen. Dispersion and fate of the degradation products in aqueous environment</atitle><jtitle>Environmental pollution (1987)</jtitle><date>2010-12-01</date><risdate>2010</risdate><volume>158</volume><issue>12</issue><spage>3482</spage><epage>3489</epage><pages>3482-3489</pages><issn>0269-7491</issn><eissn>1873-6424</eissn><coden>ENVPAF</coden><abstract>Aging in water of a TiO2-based nanocomposite used in sunscreen cosmetics has been studied as a function of light and time. It consisted initially in a TiO2 core, coated with Al(OH)3 and polydimethylsiloxane (PDMS) layers. Size measurement, coating alteration, and surface charge were followed by laser diffraction, TEM/EDS, ICP-AES and electrophoretic mobility measurement. The nanocomposite rapidly underwent progressive dispersion in the aqueous phase, enabled by the dissolution of the PDMS layer. A stable suspension of colloidal byproducts from 50 to 700nm in size was formed. Their positively charged Al(OH)3 surface was evidenced with an isoelectric point around 7-8, controlling the dispersion stability. The critical coagulation concentrations measured with NaCl and CaCl2 was 2 OE 10 super(-2) and 8 OE 10 super(-3) M respectively. The presence of natural organic matter affected the colloidal stability according to the NOM/byproduct ratio. A 2 wt% ratio favored bridging flocculation, whereas a 20 wt% ratio induced sterical stabilization. Aging in aqueous conditions of TiO2 nanocomposite used in sunscreens induces rapid generation of nanometric byproducts remaining stable in suspension.</abstract><cop>Kidlington</cop><pub>Elsevier</pub><doi>10.1016/j.envpol.2010.02.012</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-4033-537X</orcidid><orcidid>https://orcid.org/0000-0003-4207-3526</orcidid><orcidid>https://orcid.org/0000-0003-0408-8524</orcidid><orcidid>https://orcid.org/0000-0002-6466-2391</orcidid><orcidid>https://orcid.org/0000-0003-1655-1977</orcidid><orcidid>https://orcid.org/0000-0003-3071-8147</orcidid></addata></record> |
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| ispartof | Environmental pollution (1987), 2010-12, Vol.158 (12), p.3482-3489 |
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| subjects | Applied sciences Byproducts Colloids Continental interfaces, environment Dispersions Emission analysis Environment and Society Environmental Sciences Exact sciences and technology Inductively coupled plasma Nanocomposites Pollution Sciences of the Universe Silicone resins Spectroscopy Titanium dioxide |
| title | Aging of TiO2 nanocomposites used in sunscreen. Dispersion and fate of the degradation products in aqueous environment |
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