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Effects of pH on the ability of flavonoids to act as Pickering emulsion stabilizers
[Display omitted] ► The ability of different pure flavonoids to stabilize emulsions via the Pickering mechanism can vary strongly with pH. ► The varying stability with pH is largely due to varying flavonoid particle charge. ► A buckwheat tea extract, rich in rutin, was also shown to be an effective...
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| Published in: | Colloids and surfaces, B, Biointerfaces B, Biointerfaces, 2012-04, Vol.92, p.84-90 |
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| cites | cdi_FETCH-LOGICAL-c457t-be94903dcf7829423fb6f54a5d3d6fc60876597c11865dc39f14cf3c1e4665c73 |
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| container_title | Colloids and surfaces, B, Biointerfaces |
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| creator | Luo, Zijun Murray, Brent S. Ross, Anne-Lise Povey, Malcolm J.W. Morgan, Michael R.A. Day, Andrea J. |
| description | [Display omitted]
► The ability of different pure flavonoids to stabilize emulsions via the Pickering mechanism can vary strongly with pH. ► The varying stability with pH is largely due to varying flavonoid particle charge. ► A buckwheat tea extract, rich in rutin, was also shown to be an effective Pickering stabilizer of sunflower O/W emulsions.
The flavonoids tiliroside, rutin and naringin have been investigated as stabilizers of Pickering oil-in-water (O/W) emulsions. The mean droplet size of tetradecane emulsions was considerably smaller at higher pH, especially for rutin. The solubility of flavonoids in the aqueous phase was 4–6 times higher at pH 8 compared to pH 2 for tiliroside and rutin, although all absolute solubilities remained low ( |
| doi_str_mv | 10.1016/j.colsurfb.2011.11.027 |
| format | article |
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► The ability of different pure flavonoids to stabilize emulsions via the Pickering mechanism can vary strongly with pH. ► The varying stability with pH is largely due to varying flavonoid particle charge. ► A buckwheat tea extract, rich in rutin, was also shown to be an effective Pickering stabilizer of sunflower O/W emulsions.
The flavonoids tiliroside, rutin and naringin have been investigated as stabilizers of Pickering oil-in-water (O/W) emulsions. The mean droplet size of tetradecane emulsions was considerably smaller at higher pH, especially for rutin. The solubility of flavonoids in the aqueous phase was 4–6 times higher at pH 8 compared to pH 2 for tiliroside and rutin, although all absolute solubilities remained low (<1mM). This agreed with a slight increase in surface activity of tiliroside and rutin at the O–W interface at pH 8 compared to pH 2. However, improved emulsion stabilization at higher pH is better explained by the significant increase in ζ-potential of the flavonoid particles to more negative values at pH 8, which will improve particle dispersion and increase the charge on the droplets stabilized by them. A buckwheat tea extract, rich in rutin, was also shown to be an effective stabilizer of sunflower O/W emulsions.</description><identifier>ISSN: 0927-7765</identifier><identifier>EISSN: 1873-4367</identifier><identifier>DOI: 10.1016/j.colsurfb.2011.11.027</identifier><identifier>PMID: 22197223</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>buckwheat ; colloids ; Dispersions ; droplet size ; Droplets ; Emulsions ; Emulsions - chemistry ; Flavanones - chemistry ; Flavonoids ; Flavonoids - chemistry ; Helianthus ; Helianthus annuus ; Hydrogen-Ion Concentration ; Microscopy, Confocal ; Models, Chemical ; Naringin ; Particle Size ; Pickering emulsions ; Rutin ; Rutin - chemistry ; Solubility ; stabilizers ; Static Electricity ; Surface chemistry ; Suspensions ; tea ; Tetradecane ; Tiliroside ; zeta potential</subject><ispartof>Colloids and surfaces, B, Biointerfaces, 2012-04, Vol.92, p.84-90</ispartof><rights>2011 Elsevier B.V.</rights><rights>Copyright © 2011 Elsevier B.V. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c457t-be94903dcf7829423fb6f54a5d3d6fc60876597c11865dc39f14cf3c1e4665c73</citedby><cites>FETCH-LOGICAL-c457t-be94903dcf7829423fb6f54a5d3d6fc60876597c11865dc39f14cf3c1e4665c73</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22197223$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Luo, Zijun</creatorcontrib><creatorcontrib>Murray, Brent S.</creatorcontrib><creatorcontrib>Ross, Anne-Lise</creatorcontrib><creatorcontrib>Povey, Malcolm J.W.</creatorcontrib><creatorcontrib>Morgan, Michael R.A.</creatorcontrib><creatorcontrib>Day, Andrea J.</creatorcontrib><title>Effects of pH on the ability of flavonoids to act as Pickering emulsion stabilizers</title><title>Colloids and surfaces, B, Biointerfaces</title><addtitle>Colloids Surf B Biointerfaces</addtitle><description>[Display omitted]
► The ability of different pure flavonoids to stabilize emulsions via the Pickering mechanism can vary strongly with pH. ► The varying stability with pH is largely due to varying flavonoid particle charge. ► A buckwheat tea extract, rich in rutin, was also shown to be an effective Pickering stabilizer of sunflower O/W emulsions.
The flavonoids tiliroside, rutin and naringin have been investigated as stabilizers of Pickering oil-in-water (O/W) emulsions. The mean droplet size of tetradecane emulsions was considerably smaller at higher pH, especially for rutin. The solubility of flavonoids in the aqueous phase was 4–6 times higher at pH 8 compared to pH 2 for tiliroside and rutin, although all absolute solubilities remained low (<1mM). This agreed with a slight increase in surface activity of tiliroside and rutin at the O–W interface at pH 8 compared to pH 2. However, improved emulsion stabilization at higher pH is better explained by the significant increase in ζ-potential of the flavonoid particles to more negative values at pH 8, which will improve particle dispersion and increase the charge on the droplets stabilized by them. A buckwheat tea extract, rich in rutin, was also shown to be an effective stabilizer of sunflower O/W emulsions.</description><subject>buckwheat</subject><subject>colloids</subject><subject>Dispersions</subject><subject>droplet size</subject><subject>Droplets</subject><subject>Emulsions</subject><subject>Emulsions - chemistry</subject><subject>Flavanones - chemistry</subject><subject>Flavonoids</subject><subject>Flavonoids - chemistry</subject><subject>Helianthus</subject><subject>Helianthus annuus</subject><subject>Hydrogen-Ion Concentration</subject><subject>Microscopy, Confocal</subject><subject>Models, Chemical</subject><subject>Naringin</subject><subject>Particle Size</subject><subject>Pickering emulsions</subject><subject>Rutin</subject><subject>Rutin - chemistry</subject><subject>Solubility</subject><subject>stabilizers</subject><subject>Static Electricity</subject><subject>Surface chemistry</subject><subject>Suspensions</subject><subject>tea</subject><subject>Tetradecane</subject><subject>Tiliroside</subject><subject>zeta potential</subject><issn>0927-7765</issn><issn>1873-4367</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqNkV1PHCEUhklTU1fbv6Dc1ZtZ-RoY7toYqyYmNVGvCcOAss4OW5gxsb_eM656aRtOICHPezjhQeiAkiUlVB6vli71ZcqhXTJC6RKKMPUJLWijeCW4VJ_RgmimKqVkvYv2SlkRQpig6gvaZYxqxRhfoOvTELwbC04Bb85xGvB477FtYx_Hp_ky9PYxDSl2BY8JWzdiW_BVdA8-x-EO-_XUlwixMr6E_vpcvqKdYPviv72e--j21-nNyXl1-fvs4uTnZeVErcaq9VpowjsXVMO0YDy0MtTC1h3vZHCSNDC5Vo7SRtad4zpQ4QJ31Aspa6f4Pvq-7bvJ6c_ky2jWsTjf93bwaSpGU9XUsDSQRx-SAEpGpWDNf6DzUMBTQOUWdTmVkn0wmxzXNj8ZSsxsyazMmyUzWzJQYAmCB69vTO3ad--xNy0AHG6BYJOxdzkWc3sNHSQo5LDNLX5sCQ8f_Bh9NsVFPzjfxQw-TZfiv6Z4Bu1Krq8</recordid><startdate>20120401</startdate><enddate>20120401</enddate><creator>Luo, Zijun</creator><creator>Murray, Brent S.</creator><creator>Ross, Anne-Lise</creator><creator>Povey, Malcolm J.W.</creator><creator>Morgan, Michael R.A.</creator><creator>Day, Andrea J.</creator><general>Elsevier B.V</general><scope>FBQ</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QO</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>JG9</scope><scope>L7M</scope><scope>7X8</scope></search><sort><creationdate>20120401</creationdate><title>Effects of pH on the ability of flavonoids to act as Pickering emulsion stabilizers</title><author>Luo, Zijun ; Murray, Brent S. ; Ross, Anne-Lise ; Povey, Malcolm J.W. ; Morgan, Michael R.A. ; Day, Andrea J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c457t-be94903dcf7829423fb6f54a5d3d6fc60876597c11865dc39f14cf3c1e4665c73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>buckwheat</topic><topic>colloids</topic><topic>Dispersions</topic><topic>droplet size</topic><topic>Droplets</topic><topic>Emulsions</topic><topic>Emulsions - chemistry</topic><topic>Flavanones - chemistry</topic><topic>Flavonoids</topic><topic>Flavonoids - chemistry</topic><topic>Helianthus</topic><topic>Helianthus annuus</topic><topic>Hydrogen-Ion Concentration</topic><topic>Microscopy, Confocal</topic><topic>Models, Chemical</topic><topic>Naringin</topic><topic>Particle Size</topic><topic>Pickering emulsions</topic><topic>Rutin</topic><topic>Rutin - chemistry</topic><topic>Solubility</topic><topic>stabilizers</topic><topic>Static Electricity</topic><topic>Surface chemistry</topic><topic>Suspensions</topic><topic>tea</topic><topic>Tetradecane</topic><topic>Tiliroside</topic><topic>zeta potential</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Luo, Zijun</creatorcontrib><creatorcontrib>Murray, Brent S.</creatorcontrib><creatorcontrib>Ross, Anne-Lise</creatorcontrib><creatorcontrib>Povey, Malcolm J.W.</creatorcontrib><creatorcontrib>Morgan, Michael R.A.</creatorcontrib><creatorcontrib>Day, Andrea J.</creatorcontrib><collection>AGRIS</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Biotechnology Research Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Colloids and surfaces, B, Biointerfaces</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Luo, Zijun</au><au>Murray, Brent S.</au><au>Ross, Anne-Lise</au><au>Povey, Malcolm J.W.</au><au>Morgan, Michael R.A.</au><au>Day, Andrea J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of pH on the ability of flavonoids to act as Pickering emulsion stabilizers</atitle><jtitle>Colloids and surfaces, B, Biointerfaces</jtitle><addtitle>Colloids Surf B Biointerfaces</addtitle><date>2012-04-01</date><risdate>2012</risdate><volume>92</volume><spage>84</spage><epage>90</epage><pages>84-90</pages><issn>0927-7765</issn><eissn>1873-4367</eissn><abstract>[Display omitted]
► The ability of different pure flavonoids to stabilize emulsions via the Pickering mechanism can vary strongly with pH. ► The varying stability with pH is largely due to varying flavonoid particle charge. ► A buckwheat tea extract, rich in rutin, was also shown to be an effective Pickering stabilizer of sunflower O/W emulsions.
The flavonoids tiliroside, rutin and naringin have been investigated as stabilizers of Pickering oil-in-water (O/W) emulsions. The mean droplet size of tetradecane emulsions was considerably smaller at higher pH, especially for rutin. The solubility of flavonoids in the aqueous phase was 4–6 times higher at pH 8 compared to pH 2 for tiliroside and rutin, although all absolute solubilities remained low (<1mM). This agreed with a slight increase in surface activity of tiliroside and rutin at the O–W interface at pH 8 compared to pH 2. However, improved emulsion stabilization at higher pH is better explained by the significant increase in ζ-potential of the flavonoid particles to more negative values at pH 8, which will improve particle dispersion and increase the charge on the droplets stabilized by them. A buckwheat tea extract, rich in rutin, was also shown to be an effective stabilizer of sunflower O/W emulsions.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>22197223</pmid><doi>10.1016/j.colsurfb.2011.11.027</doi><tpages>7</tpages></addata></record> |
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| ispartof | Colloids and surfaces, B, Biointerfaces, 2012-04, Vol.92, p.84-90 |
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| subjects | buckwheat colloids Dispersions droplet size Droplets Emulsions Emulsions - chemistry Flavanones - chemistry Flavonoids Flavonoids - chemistry Helianthus Helianthus annuus Hydrogen-Ion Concentration Microscopy, Confocal Models, Chemical Naringin Particle Size Pickering emulsions Rutin Rutin - chemistry Solubility stabilizers Static Electricity Surface chemistry Suspensions tea Tetradecane Tiliroside zeta potential |
| title | Effects of pH on the ability of flavonoids to act as Pickering emulsion stabilizers |
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