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Robust polyazobenzene microcapsules with photoresponsive pore channels and tunable release profiles
Structure of pore channels in the shell of PAzo microcapsules and release curves of RhB from PAzo microcapsules. Monodisperse silica particles coated with azobenzene polymer (PAzo) shell were synthesized through distillation precipitation polymerization. Robust PAzo microcapsules were obtained after...
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| Published in: | European polymer journal 2012, Vol.48 (1), p.41-48 |
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| Main Authors: | , , , , , |
| Format: | Article |
| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c415t-86ee72eeed95bf8d20e3e7a78b89ba429b04f616193bd4cc8fac287a9ce403573 |
| container_end_page | 48 |
| container_issue | 1 |
| container_start_page | 41 |
| container_title | European polymer journal |
| container_volume | 48 |
| creator | Wang, Xiaotao Yang, Yingkui Liao, Yonggui Yang, Zhifang Jiang, Man Xie, Xiaolin |
| description | Structure of pore channels in the shell of PAzo microcapsules and release curves of RhB from PAzo microcapsules.
Monodisperse silica particles coated with azobenzene polymer (PAzo) shell were synthesized through distillation precipitation polymerization. Robust PAzo microcapsules were obtained after selective removal of the silica templates by hydrofluoric acid (HF) etching. These PAzo microcapsules, confirmed by transmission electron microscopy (TEM) investigation, had excellent reversible photoisomerization with transformation between
trans and
cis isomers under ultraviolet (UV) and visible lights. Due to their compatibility with PAzo, acetonitrile would be trapped in the network of the shell during polymerization. Pore channels in the shell, confirmed by nitrogen adsorption–desorption test, would be produced after acetonitrile evaporation. Loading and release of rhodamine B (RhB) molecules in PAzo microcapsules were carried out and indicated that
cis azobenzene showed larger pore diameter (named as “open switch”) under UV light which favored permeation of RhB molecules, while
trans structure (named as “closed switch”) under visible light slowed down the process. In addition, both release profiles obeyed pure Fickian diffusion with a power law of
t
0.42. Diffusion coefficient of RhB from PAzo microcapsules under visible light (1.47
×
10
−12
cm
2/s) was lower than that under UV light (2.12
×
10
−12
cm
2/s). |
| doi_str_mv | 10.1016/j.eurpolymj.2011.10.012 |
| format | article |
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Monodisperse silica particles coated with azobenzene polymer (PAzo) shell were synthesized through distillation precipitation polymerization. Robust PAzo microcapsules were obtained after selective removal of the silica templates by hydrofluoric acid (HF) etching. These PAzo microcapsules, confirmed by transmission electron microscopy (TEM) investigation, had excellent reversible photoisomerization with transformation between
trans and
cis isomers under ultraviolet (UV) and visible lights. Due to their compatibility with PAzo, acetonitrile would be trapped in the network of the shell during polymerization. Pore channels in the shell, confirmed by nitrogen adsorption–desorption test, would be produced after acetonitrile evaporation. Loading and release of rhodamine B (RhB) molecules in PAzo microcapsules were carried out and indicated that
cis azobenzene showed larger pore diameter (named as “open switch”) under UV light which favored permeation of RhB molecules, while
trans structure (named as “closed switch”) under visible light slowed down the process. In addition, both release profiles obeyed pure Fickian diffusion with a power law of
t
0.42. Diffusion coefficient of RhB from PAzo microcapsules under visible light (1.47
×
10
−12
cm
2/s) was lower than that under UV light (2.12
×
10
−12
cm
2/s).</description><identifier>ISSN: 0014-3057</identifier><identifier>EISSN: 1873-1945</identifier><identifier>DOI: 10.1016/j.eurpolymj.2011.10.012</identifier><identifier>CODEN: EUPJAG</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Acetonitrile ; Applied sciences ; Azobenzene ; Channels ; Controlled release ; Exact sciences and technology ; Forms of application and semi-finished materials ; Microcapsules ; Miscellaneous ; Photoresponsive behavior ; Polymer industry, paints, wood ; Polymerization ; Porosity ; Shells ; Silicon dioxide ; Switches ; Technology of polymers ; Ultraviolet</subject><ispartof>European polymer journal, 2012, Vol.48 (1), p.41-48</ispartof><rights>2011 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c415t-86ee72eeed95bf8d20e3e7a78b89ba429b04f616193bd4cc8fac287a9ce403573</citedby><cites>FETCH-LOGICAL-c415t-86ee72eeed95bf8d20e3e7a78b89ba429b04f616193bd4cc8fac287a9ce403573</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,4010,27904,27905,27906</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=25429038$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Wang, Xiaotao</creatorcontrib><creatorcontrib>Yang, Yingkui</creatorcontrib><creatorcontrib>Liao, Yonggui</creatorcontrib><creatorcontrib>Yang, Zhifang</creatorcontrib><creatorcontrib>Jiang, Man</creatorcontrib><creatorcontrib>Xie, Xiaolin</creatorcontrib><title>Robust polyazobenzene microcapsules with photoresponsive pore channels and tunable release profiles</title><title>European polymer journal</title><description>Structure of pore channels in the shell of PAzo microcapsules and release curves of RhB from PAzo microcapsules.
Monodisperse silica particles coated with azobenzene polymer (PAzo) shell were synthesized through distillation precipitation polymerization. Robust PAzo microcapsules were obtained after selective removal of the silica templates by hydrofluoric acid (HF) etching. These PAzo microcapsules, confirmed by transmission electron microscopy (TEM) investigation, had excellent reversible photoisomerization with transformation between
trans and
cis isomers under ultraviolet (UV) and visible lights. Due to their compatibility with PAzo, acetonitrile would be trapped in the network of the shell during polymerization. Pore channels in the shell, confirmed by nitrogen adsorption–desorption test, would be produced after acetonitrile evaporation. Loading and release of rhodamine B (RhB) molecules in PAzo microcapsules were carried out and indicated that
cis azobenzene showed larger pore diameter (named as “open switch”) under UV light which favored permeation of RhB molecules, while
trans structure (named as “closed switch”) under visible light slowed down the process. In addition, both release profiles obeyed pure Fickian diffusion with a power law of
t
0.42. Diffusion coefficient of RhB from PAzo microcapsules under visible light (1.47
×
10
−12
cm
2/s) was lower than that under UV light (2.12
×
10
−12
cm
2/s).</description><subject>Acetonitrile</subject><subject>Applied sciences</subject><subject>Azobenzene</subject><subject>Channels</subject><subject>Controlled release</subject><subject>Exact sciences and technology</subject><subject>Forms of application and semi-finished materials</subject><subject>Microcapsules</subject><subject>Miscellaneous</subject><subject>Photoresponsive behavior</subject><subject>Polymer industry, paints, wood</subject><subject>Polymerization</subject><subject>Porosity</subject><subject>Shells</subject><subject>Silicon dioxide</subject><subject>Switches</subject><subject>Technology of polymers</subject><subject>Ultraviolet</subject><issn>0014-3057</issn><issn>1873-1945</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkF1LwzAUhoMoOKe_wd4I3nQmTdukl2P4BYIgel3S9JRlZEnNaZXt15uysVuvAsnznvfkIeSW0QWjrHzYLGAMvbe77WaRUcbi7YKy7IzMmBQ8ZVVenJMZpSxPOS3EJblC3FBKBS_5jOgP34w4JNMAtfcNuD04SLZGB69Vj6MFTH7NsE76tR98AOy9Q_MDMREg0WvlHFhMlGuTYXSqsZAEsKAwEsF3JuavyUWnLMLN8ZyTr6fHz9VL-vb-_LpavqU6Z8WQyhJAZADQVkXTyTajwEEoIRtZNSrPqobmXclKVvGmzbWWndKZFKrSkFNeCD4n94e5sfh7BBzqrUEN1ioHfsQ66qJS5FU5oeKAxm8iBujqPpitCrsITVxZb-qT1nrSOj1ErTF5dyxRqJXtgnLa4CmeFXFRymXklgcu2oEfA6FGbcBpaE0APdStN_92_QF9xZYH</recordid><startdate>2012</startdate><enddate>2012</enddate><creator>Wang, Xiaotao</creator><creator>Yang, Yingkui</creator><creator>Liao, Yonggui</creator><creator>Yang, Zhifang</creator><creator>Jiang, Man</creator><creator>Xie, Xiaolin</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>2012</creationdate><title>Robust polyazobenzene microcapsules with photoresponsive pore channels and tunable release profiles</title><author>Wang, Xiaotao ; Yang, Yingkui ; Liao, Yonggui ; Yang, Zhifang ; Jiang, Man ; Xie, Xiaolin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c415t-86ee72eeed95bf8d20e3e7a78b89ba429b04f616193bd4cc8fac287a9ce403573</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Acetonitrile</topic><topic>Applied sciences</topic><topic>Azobenzene</topic><topic>Channels</topic><topic>Controlled release</topic><topic>Exact sciences and technology</topic><topic>Forms of application and semi-finished materials</topic><topic>Microcapsules</topic><topic>Miscellaneous</topic><topic>Photoresponsive behavior</topic><topic>Polymer industry, paints, wood</topic><topic>Polymerization</topic><topic>Porosity</topic><topic>Shells</topic><topic>Silicon dioxide</topic><topic>Switches</topic><topic>Technology of polymers</topic><topic>Ultraviolet</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Xiaotao</creatorcontrib><creatorcontrib>Yang, Yingkui</creatorcontrib><creatorcontrib>Liao, Yonggui</creatorcontrib><creatorcontrib>Yang, Zhifang</creatorcontrib><creatorcontrib>Jiang, Man</creatorcontrib><creatorcontrib>Xie, Xiaolin</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>European polymer journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Xiaotao</au><au>Yang, Yingkui</au><au>Liao, Yonggui</au><au>Yang, Zhifang</au><au>Jiang, Man</au><au>Xie, Xiaolin</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Robust polyazobenzene microcapsules with photoresponsive pore channels and tunable release profiles</atitle><jtitle>European polymer journal</jtitle><date>2012</date><risdate>2012</risdate><volume>48</volume><issue>1</issue><spage>41</spage><epage>48</epage><pages>41-48</pages><issn>0014-3057</issn><eissn>1873-1945</eissn><coden>EUPJAG</coden><abstract>Structure of pore channels in the shell of PAzo microcapsules and release curves of RhB from PAzo microcapsules.
Monodisperse silica particles coated with azobenzene polymer (PAzo) shell were synthesized through distillation precipitation polymerization. Robust PAzo microcapsules were obtained after selective removal of the silica templates by hydrofluoric acid (HF) etching. These PAzo microcapsules, confirmed by transmission electron microscopy (TEM) investigation, had excellent reversible photoisomerization with transformation between
trans and
cis isomers under ultraviolet (UV) and visible lights. Due to their compatibility with PAzo, acetonitrile would be trapped in the network of the shell during polymerization. Pore channels in the shell, confirmed by nitrogen adsorption–desorption test, would be produced after acetonitrile evaporation. Loading and release of rhodamine B (RhB) molecules in PAzo microcapsules were carried out and indicated that
cis azobenzene showed larger pore diameter (named as “open switch”) under UV light which favored permeation of RhB molecules, while
trans structure (named as “closed switch”) under visible light slowed down the process. In addition, both release profiles obeyed pure Fickian diffusion with a power law of
t
0.42. Diffusion coefficient of RhB from PAzo microcapsules under visible light (1.47
×
10
−12
cm
2/s) was lower than that under UV light (2.12
×
10
−12
cm
2/s).</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.eurpolymj.2011.10.012</doi><tpages>8</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0014-3057 |
| ispartof | European polymer journal, 2012, Vol.48 (1), p.41-48 |
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| language | eng |
| recordid | cdi_proquest_miscellaneous_1010874967 |
| source | Elsevier |
| subjects | Acetonitrile Applied sciences Azobenzene Channels Controlled release Exact sciences and technology Forms of application and semi-finished materials Microcapsules Miscellaneous Photoresponsive behavior Polymer industry, paints, wood Polymerization Porosity Shells Silicon dioxide Switches Technology of polymers Ultraviolet |
| title | Robust polyazobenzene microcapsules with photoresponsive pore channels and tunable release profiles |
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