Effect of Surfactant Molecular Structure on Emulsion Stability Investigated by Interfacial Dilatational Rheology
Polyglycerol polyricinolate (PGPR) and polyglycerol-2 dioleate were selected as model surfactants to construct water-in-oil (W/O) emulsions, and the effect of interfacial rheological properties of surfactant film on the stability of emulsions were investigated based on the interfacial dilatational r...
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| Veröffentlicht in: | Polymers 2021-04, Vol.13 (7), p.1127 |
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| creator | Jin, Yuejie Liu, Dingrong Hu, Jinhua |
| description | Polyglycerol polyricinolate (PGPR) and polyglycerol-2 dioleate were selected as model surfactants to construct water-in-oil (W/O) emulsions, and the effect of interfacial rheological properties of surfactant film on the stability of emulsions were investigated based on the interfacial dilatational rheological method. The hydrophobicity chain of PGPR is polyricinic acid condensed from ricinic acid, and that of polyglycerol-2 dioleate is oleic acid. Their dynamic interfacial tensions in 15 cycles of interfacial compression-expansion were determined. The interfacial dilatational viscoelasticity was analyzed by amplitude scanning in the range of 1-28% amplitude and frequency sweep in the range of 5-45 mHz under 2% amplitude. It was found that PGPR could quickly reach adsorption equilibrium and form interfacial film with higher interfacial dilatational viscoelastic modulus to resist the deformation of interfacial film caused by emulsion coalescence, due to its branched chain structure and longer hydrophobic chain, and the emulsion thus presented good stability. However, polyglycerol-2 dioleate with a straight chain structure had lower interfacial tension, and it failed to resist the interfacial disturbance caused by coalescence because of its lower interfacial dilatational viscoelastic modulus, and thus the emulsion was unstable. This study reveals profound understanding of the influence of branched structure of PGPR hydrophobic chain on the interfacial film properties and the emulsion stability, providing experimental reference and theoretical guidance for future design or improvement of surfactant. |
| doi_str_mv | 10.3390/polym13071127 |
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The hydrophobicity chain of PGPR is polyricinic acid condensed from ricinic acid, and that of polyglycerol-2 dioleate is oleic acid. Their dynamic interfacial tensions in 15 cycles of interfacial compression-expansion were determined. The interfacial dilatational viscoelasticity was analyzed by amplitude scanning in the range of 1-28% amplitude and frequency sweep in the range of 5-45 mHz under 2% amplitude. It was found that PGPR could quickly reach adsorption equilibrium and form interfacial film with higher interfacial dilatational viscoelastic modulus to resist the deformation of interfacial film caused by emulsion coalescence, due to its branched chain structure and longer hydrophobic chain, and the emulsion thus presented good stability. However, polyglycerol-2 dioleate with a straight chain structure had lower interfacial tension, and it failed to resist the interfacial disturbance caused by coalescence because of its lower interfacial dilatational viscoelastic modulus, and thus the emulsion was unstable. This study reveals profound understanding of the influence of branched structure of PGPR hydrophobic chain on the interfacial film properties and the emulsion stability, providing experimental reference and theoretical guidance for future design or improvement of surfactant.</description><identifier>ISSN: 2073-4360</identifier><identifier>EISSN: 2073-4360</identifier><identifier>DOI: 10.3390/polym13071127</identifier><identifier>PMID: 33918141</identifier><language>eng</language><publisher>Switzerland: MDPI AG</publisher><subject>Acids ; Adsorption ; Amplitudes ; Chain branching ; Chains ; Coalescing ; Emulsions ; Hydrophobicity ; Interface stability ; Investigations ; Molecular structure ; Oil recovery ; Oleic acid ; Polyglycerols ; Rheological properties ; Rheology ; Structural stability ; Surface tension ; Surfactants ; Viscoelasticity</subject><ispartof>Polymers, 2021-04, Vol.13 (7), p.1127</ispartof><rights>2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2021 by the authors. 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c415t-ab84fbfd31a587a9b24e07eb721bf5ade52a3b981dd5e745ec0b6bd01377dac83</citedby><cites>FETCH-LOGICAL-c415t-ab84fbfd31a587a9b24e07eb721bf5ade52a3b981dd5e745ec0b6bd01377dac83</cites><orcidid>0000-0002-7772-4424</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC8037813/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC8037813/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,881,27903,27904,53769,53771</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33918141$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Jin, Yuejie</creatorcontrib><creatorcontrib>Liu, Dingrong</creatorcontrib><creatorcontrib>Hu, Jinhua</creatorcontrib><title>Effect of Surfactant Molecular Structure on Emulsion Stability Investigated by Interfacial Dilatational Rheology</title><title>Polymers</title><addtitle>Polymers (Basel)</addtitle><description>Polyglycerol polyricinolate (PGPR) and polyglycerol-2 dioleate were selected as model surfactants to construct water-in-oil (W/O) emulsions, and the effect of interfacial rheological properties of surfactant film on the stability of emulsions were investigated based on the interfacial dilatational rheological method. The hydrophobicity chain of PGPR is polyricinic acid condensed from ricinic acid, and that of polyglycerol-2 dioleate is oleic acid. Their dynamic interfacial tensions in 15 cycles of interfacial compression-expansion were determined. The interfacial dilatational viscoelasticity was analyzed by amplitude scanning in the range of 1-28% amplitude and frequency sweep in the range of 5-45 mHz under 2% amplitude. It was found that PGPR could quickly reach adsorption equilibrium and form interfacial film with higher interfacial dilatational viscoelastic modulus to resist the deformation of interfacial film caused by emulsion coalescence, due to its branched chain structure and longer hydrophobic chain, and the emulsion thus presented good stability. However, polyglycerol-2 dioleate with a straight chain structure had lower interfacial tension, and it failed to resist the interfacial disturbance caused by coalescence because of its lower interfacial dilatational viscoelastic modulus, and thus the emulsion was unstable. This study reveals profound understanding of the influence of branched structure of PGPR hydrophobic chain on the interfacial film properties and the emulsion stability, providing experimental reference and theoretical guidance for future design or improvement of surfactant.</description><subject>Acids</subject><subject>Adsorption</subject><subject>Amplitudes</subject><subject>Chain branching</subject><subject>Chains</subject><subject>Coalescing</subject><subject>Emulsions</subject><subject>Hydrophobicity</subject><subject>Interface stability</subject><subject>Investigations</subject><subject>Molecular structure</subject><subject>Oil recovery</subject><subject>Oleic acid</subject><subject>Polyglycerols</subject><subject>Rheological properties</subject><subject>Rheology</subject><subject>Structural stability</subject><subject>Surface tension</subject><subject>Surfactants</subject><subject>Viscoelasticity</subject><issn>2073-4360</issn><issn>2073-4360</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdkc1rVDEUxYMotoxdupUHbtw8m4-Xl8xGkDraQkVwdB1u8pJpSt7LmI_C_PdmaC2td3PvJb97yOEg9Jbgj4yt8fk-hsNMGBaEUPECnVIsWD-wEb98Mp-gs5xvcauBjyMRr9FJOyaSDOQU7TfOWVO66LptTQ5MgaV032OwpgZI3bakakpNtotLt5lryL4N2wLaB18O3dVyZ3PxOyh26vRxL_Yo4yF0X3yAAqUdtOXnjY0h7g5v0CsHIduzh75Cv79ufl1c9tc_vl1dfL7uzUB46UHLwWk3MQJcClhrOlgsrBaUaMdhspwC02tJpolbMXBrsB71hAkTYgIj2Qp9utfdVz3bydilJAhqn_wM6aAiePX8ZfE3ahfvlMRMSMKawIcHgRT_1GZSzT4bGwIsNtasKKdYjpSxsaHv_0NvY03N9ZHimA6SNdUV6u8pk2LOybrHzxCsjnGqZ3E2_t1TB4_0v_DYX7donw0</recordid><startdate>20210402</startdate><enddate>20210402</enddate><creator>Jin, Yuejie</creator><creator>Liu, Dingrong</creator><creator>Hu, Jinhua</creator><general>MDPI AG</general><general>MDPI</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0002-7772-4424</orcidid></search><sort><creationdate>20210402</creationdate><title>Effect of Surfactant Molecular Structure on Emulsion Stability Investigated by Interfacial Dilatational Rheology</title><author>Jin, Yuejie ; Liu, Dingrong ; Hu, Jinhua</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c415t-ab84fbfd31a587a9b24e07eb721bf5ade52a3b981dd5e745ec0b6bd01377dac83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Acids</topic><topic>Adsorption</topic><topic>Amplitudes</topic><topic>Chain branching</topic><topic>Chains</topic><topic>Coalescing</topic><topic>Emulsions</topic><topic>Hydrophobicity</topic><topic>Interface stability</topic><topic>Investigations</topic><topic>Molecular structure</topic><topic>Oil recovery</topic><topic>Oleic acid</topic><topic>Polyglycerols</topic><topic>Rheological properties</topic><topic>Rheology</topic><topic>Structural stability</topic><topic>Surface tension</topic><topic>Surfactants</topic><topic>Viscoelasticity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jin, Yuejie</creatorcontrib><creatorcontrib>Liu, Dingrong</creatorcontrib><creatorcontrib>Hu, Jinhua</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection (ProQuest)</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Polymers</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jin, Yuejie</au><au>Liu, Dingrong</au><au>Hu, Jinhua</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Surfactant Molecular Structure on Emulsion Stability Investigated by Interfacial Dilatational Rheology</atitle><jtitle>Polymers</jtitle><addtitle>Polymers (Basel)</addtitle><date>2021-04-02</date><risdate>2021</risdate><volume>13</volume><issue>7</issue><spage>1127</spage><pages>1127-</pages><issn>2073-4360</issn><eissn>2073-4360</eissn><abstract>Polyglycerol polyricinolate (PGPR) and polyglycerol-2 dioleate were selected as model surfactants to construct water-in-oil (W/O) emulsions, and the effect of interfacial rheological properties of surfactant film on the stability of emulsions were investigated based on the interfacial dilatational rheological method. The hydrophobicity chain of PGPR is polyricinic acid condensed from ricinic acid, and that of polyglycerol-2 dioleate is oleic acid. Their dynamic interfacial tensions in 15 cycles of interfacial compression-expansion were determined. The interfacial dilatational viscoelasticity was analyzed by amplitude scanning in the range of 1-28% amplitude and frequency sweep in the range of 5-45 mHz under 2% amplitude. It was found that PGPR could quickly reach adsorption equilibrium and form interfacial film with higher interfacial dilatational viscoelastic modulus to resist the deformation of interfacial film caused by emulsion coalescence, due to its branched chain structure and longer hydrophobic chain, and the emulsion thus presented good stability. However, polyglycerol-2 dioleate with a straight chain structure had lower interfacial tension, and it failed to resist the interfacial disturbance caused by coalescence because of its lower interfacial dilatational viscoelastic modulus, and thus the emulsion was unstable. This study reveals profound understanding of the influence of branched structure of PGPR hydrophobic chain on the interfacial film properties and the emulsion stability, providing experimental reference and theoretical guidance for future design or improvement of surfactant.</abstract><cop>Switzerland</cop><pub>MDPI AG</pub><pmid>33918141</pmid><doi>10.3390/polym13071127</doi><orcidid>https://orcid.org/0000-0002-7772-4424</orcidid><oa>free_for_read</oa></addata></record> |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central Open Access; MDPI - Multidisciplinary Digital Publishing Institute; PubMed Central |
| subjects | Acids Adsorption Amplitudes Chain branching Chains Coalescing Emulsions Hydrophobicity Interface stability Investigations Molecular structure Oil recovery Oleic acid Polyglycerols Rheological properties Rheology Structural stability Surface tension Surfactants Viscoelasticity |
| title | Effect of Surfactant Molecular Structure on Emulsion Stability Investigated by Interfacial Dilatational Rheology |
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