Quantitative and high mass ToF-SIMS studies of siloxane segregation in hydrogel polymers using cryogenic sample handling techniques
This paper examines the capabilities of cryogenic sample handling to examine composition and structure of hydrogel materials where siloxane components are central to the analysis. XPS analysis of multicomponent polymers with cryogenic sample handling following exposure to aqueous environments has re...
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| Veröffentlicht in: | Applied surface science 2006-07, Vol.252 (19), p.6679-6682 |
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| creator | Hook, Daniel J. Valint, Paul L. Chen, Lu Gardella, Joseph A. |
| description | This paper examines the capabilities of cryogenic sample handling to examine composition and structure of hydrogel materials where siloxane components are central to the analysis. XPS analysis of multicomponent polymers with cryogenic sample handling following exposure to aqueous environments has revealed the composition and kinetics of near surface reorganization for siloxane and fluorocarbon containing polymers. In this study we report results from a ToF-SIMS protocol for cryogenic sample handling applied to the analysis of surface changes upon hydration/dehydration of hydrogel polymers. Comparison of results from angle dependent XPS and ToF-SIMS are discussed for a range of commercial soft contact lens materials. Both methods detected changes in surface chemistry between the hydrated (frozen) and dehydrated surfaces. Analysis of the hydrated surfaces detected polymer components indicative of the commercial formulation as well as ice clusters. Analysis of the dehydrated materials detected changes in surface chemistry relative to the hydrated surface in addition to loss of water due to sample dehydration. A quantitative standard additions method for ToF-SIMS data was used to determine submonolayer amounts of PDMS impurities at the surface of the hydrogels. ToF-SIMS analysis of a series of seven poly (allyl methacrylate-
g-dimethylsiloxane), AMA-
g-DMS, graft copolymers in the hydrated state revealed high mass oligomeric ion distributions for systems with bulk PDMS content greater than 25
wt.%. This marks the first time that detection of high mass oligomeric ion distributions from hydrated (frozen) surfaces has been reported. Analysis of the dehydrated surface detected formation of high mass oligomeric ion distributions for systems with PDMS bulk content greater than 15
wt.%, but only detected these ion distributions in wet (frozen) samples when the bulk concentration was greater than 25
wt.%. |
| doi_str_mv | 10.1016/j.apsusc.2006.02.250 |
| format | Article |
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g-dimethylsiloxane), AMA-
g-DMS, graft copolymers in the hydrated state revealed high mass oligomeric ion distributions for systems with bulk PDMS content greater than 25
wt.%. This marks the first time that detection of high mass oligomeric ion distributions from hydrated (frozen) surfaces has been reported. Analysis of the dehydrated surface detected formation of high mass oligomeric ion distributions for systems with PDMS bulk content greater than 15
wt.%, but only detected these ion distributions in wet (frozen) samples when the bulk concentration was greater than 25
wt.%.</description><identifier>ISSN: 0169-4332</identifier><identifier>EISSN: 1873-5584</identifier><identifier>DOI: 10.1016/j.apsusc.2006.02.250</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Condensed matter: structure, mechanical and thermal properties ; Cross-disciplinary physics: materials science; rheology ; Exact sciences and technology ; PDMS ; Physics ; Polymer reorganization ; ToF-SIMS ; Trace quantitative analysis</subject><ispartof>Applied surface science, 2006-07, Vol.252 (19), p.6679-6682</ispartof><rights>2006 Elsevier B.V.</rights><rights>2006 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c367t-f5aad2a93de6f064c046fbeb33fd2fb373f99fd8d0f80bd6117b3e85e9f395b33</citedby><cites>FETCH-LOGICAL-c367t-f5aad2a93de6f064c046fbeb33fd2fb373f99fd8d0f80bd6117b3e85e9f395b33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.apsusc.2006.02.250$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>309,310,314,780,784,789,790,3550,23930,23931,25140,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=18102948$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Hook, Daniel J.</creatorcontrib><creatorcontrib>Valint, Paul L.</creatorcontrib><creatorcontrib>Chen, Lu</creatorcontrib><creatorcontrib>Gardella, Joseph A.</creatorcontrib><title>Quantitative and high mass ToF-SIMS studies of siloxane segregation in hydrogel polymers using cryogenic sample handling techniques</title><title>Applied surface science</title><description>This paper examines the capabilities of cryogenic sample handling to examine composition and structure of hydrogel materials where siloxane components are central to the analysis. XPS analysis of multicomponent polymers with cryogenic sample handling following exposure to aqueous environments has revealed the composition and kinetics of near surface reorganization for siloxane and fluorocarbon containing polymers. In this study we report results from a ToF-SIMS protocol for cryogenic sample handling applied to the analysis of surface changes upon hydration/dehydration of hydrogel polymers. Comparison of results from angle dependent XPS and ToF-SIMS are discussed for a range of commercial soft contact lens materials. Both methods detected changes in surface chemistry between the hydrated (frozen) and dehydrated surfaces. Analysis of the hydrated surfaces detected polymer components indicative of the commercial formulation as well as ice clusters. Analysis of the dehydrated materials detected changes in surface chemistry relative to the hydrated surface in addition to loss of water due to sample dehydration. A quantitative standard additions method for ToF-SIMS data was used to determine submonolayer amounts of PDMS impurities at the surface of the hydrogels. ToF-SIMS analysis of a series of seven poly (allyl methacrylate-
g-dimethylsiloxane), AMA-
g-DMS, graft copolymers in the hydrated state revealed high mass oligomeric ion distributions for systems with bulk PDMS content greater than 25
wt.%. This marks the first time that detection of high mass oligomeric ion distributions from hydrated (frozen) surfaces has been reported. Analysis of the dehydrated surface detected formation of high mass oligomeric ion distributions for systems with PDMS bulk content greater than 15
wt.%, but only detected these ion distributions in wet (frozen) samples when the bulk concentration was greater than 25
wt.%.</description><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Condensed matter: structure, mechanical and thermal properties</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Exact sciences and technology</subject><subject>PDMS</subject><subject>Physics</subject><subject>Polymer reorganization</subject><subject>ToF-SIMS</subject><subject>Trace quantitative analysis</subject><issn>0169-4332</issn><issn>1873-5584</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNp9kEFr3DAQhUVpodsk_yAHXdqbXVmyvdalUELTBlJKSHoWsjSytdiSq7FD99w_Xi0b6K2ngZnvzeM9Qq4rVlasaj8eSr3ghqbkjLUl4yVv2Cuyq7q9KJqmq1-TXcZkUQvB35J3iAfGKp6vO_LnYdNh9ate_TNQHSwd_TDSWSPSp3hbPN59f6S4btYD0ugo-in-1gEowpBgyLIYqA90PNoUB5joEqfjDAnphj4M1KRjXgdvKOp5mYCO2WM6XVYwY_C_NsBL8sbpCeHqZV6Qn7dfnm6-Ffc_vt7dfL4vjGj3a-EarS3XUlhoHWtrw-rW9dAL4Sx3vdgLJ6WznWWuY71tq2rfC-gakE7IJmMX5MP575LiyXdVs0cD05TzxA0Vl03dSsYyWJ9BkyJiAqeW5Gedjqpi6tS4Oqhz4-rUuGJc5caz7P3Lf41GTy7pYDz-03YV47LuMvfpzEEO--whKTQeggHrE5hV2ej_b_QXQZ2cyg</recordid><startdate>20060730</startdate><enddate>20060730</enddate><creator>Hook, Daniel J.</creator><creator>Valint, Paul L.</creator><creator>Chen, Lu</creator><creator>Gardella, Joseph A.</creator><general>Elsevier B.V</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20060730</creationdate><title>Quantitative and high mass ToF-SIMS studies of siloxane segregation in hydrogel polymers using cryogenic sample handling techniques</title><author>Hook, Daniel J. ; Valint, Paul L. ; Chen, Lu ; Gardella, Joseph A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c367t-f5aad2a93de6f064c046fbeb33fd2fb373f99fd8d0f80bd6117b3e85e9f395b33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Condensed matter: structure, mechanical and thermal properties</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Exact sciences and technology</topic><topic>PDMS</topic><topic>Physics</topic><topic>Polymer reorganization</topic><topic>ToF-SIMS</topic><topic>Trace quantitative analysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hook, Daniel J.</creatorcontrib><creatorcontrib>Valint, Paul L.</creatorcontrib><creatorcontrib>Chen, Lu</creatorcontrib><creatorcontrib>Gardella, Joseph A.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Applied surface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hook, Daniel J.</au><au>Valint, Paul L.</au><au>Chen, Lu</au><au>Gardella, Joseph A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Quantitative and high mass ToF-SIMS studies of siloxane segregation in hydrogel polymers using cryogenic sample handling techniques</atitle><jtitle>Applied surface science</jtitle><date>2006-07-30</date><risdate>2006</risdate><volume>252</volume><issue>19</issue><spage>6679</spage><epage>6682</epage><pages>6679-6682</pages><issn>0169-4332</issn><eissn>1873-5584</eissn><abstract>This paper examines the capabilities of cryogenic sample handling to examine composition and structure of hydrogel materials where siloxane components are central to the analysis. XPS analysis of multicomponent polymers with cryogenic sample handling following exposure to aqueous environments has revealed the composition and kinetics of near surface reorganization for siloxane and fluorocarbon containing polymers. In this study we report results from a ToF-SIMS protocol for cryogenic sample handling applied to the analysis of surface changes upon hydration/dehydration of hydrogel polymers. Comparison of results from angle dependent XPS and ToF-SIMS are discussed for a range of commercial soft contact lens materials. Both methods detected changes in surface chemistry between the hydrated (frozen) and dehydrated surfaces. Analysis of the hydrated surfaces detected polymer components indicative of the commercial formulation as well as ice clusters. Analysis of the dehydrated materials detected changes in surface chemistry relative to the hydrated surface in addition to loss of water due to sample dehydration. A quantitative standard additions method for ToF-SIMS data was used to determine submonolayer amounts of PDMS impurities at the surface of the hydrogels. ToF-SIMS analysis of a series of seven poly (allyl methacrylate-
g-dimethylsiloxane), AMA-
g-DMS, graft copolymers in the hydrated state revealed high mass oligomeric ion distributions for systems with bulk PDMS content greater than 25
wt.%. This marks the first time that detection of high mass oligomeric ion distributions from hydrated (frozen) surfaces has been reported. Analysis of the dehydrated surface detected formation of high mass oligomeric ion distributions for systems with PDMS bulk content greater than 15
wt.%, but only detected these ion distributions in wet (frozen) samples when the bulk concentration was greater than 25
wt.%.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.apsusc.2006.02.250</doi><tpages>4</tpages></addata></record> |
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| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Exact sciences and technology PDMS Physics Polymer reorganization ToF-SIMS Trace quantitative analysis |
| title | Quantitative and high mass ToF-SIMS studies of siloxane segregation in hydrogel polymers using cryogenic sample handling techniques |
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