Preparation and physical characterization of strongly swellable oligo(oxyethylene) lignin hydrogels
Highly swellable, mechanically stable hydrogels were obtained by cross-linking different technical lignins with poly(ethylene) glycol diglycidyl ether (PEGDGE). The gelation time and the properties of the products can be controlled by the extent of pre-oxidation and the cross-linking conditions, nam...
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Veröffentlicht in: | Holzforschung 2011-05, Vol.65 (3), p.309-317 |
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description | Highly swellable, mechanically stable hydrogels were obtained by cross-linking different technical lignins with poly(ethylene) glycol diglycidyl ether (PEGDGE). The gelation time and the properties of the products can be controlled by the extent of pre-oxidation and the cross-linking conditions, namely the dynamic viscosity η*, storage and loss modulus (G′; G″), and loss factor tan δ. The highest free swelling capacities (FSC) of up to 50 g water per g xerogel were obtained from pre-oxidized pine kraft lignin Indulin® AT and spruce organosolv lignin. Dynamic rheological measurements confirmed the typical rheological behaviour of gel structures, i.e. a linear decrease of dynamic viscosity about three orders of magnitude within a frequency range of 0.08 and 20 s-1. The results furthermore revealed a good mechanical sturdiness of the cross-linked lignin hydrogels. Sandy soils supplemented with small quantities of the hydrogels were found to feature a significantly increased plant-available water content. Based on the observed effects, oligo(oxyethylene) lignins are promising materials with respect to a prolonged water retention in soils. |
doi_str_mv | 10.1515/hf.2011.044 |
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The gelation time and the properties of the products can be controlled by the extent of pre-oxidation and the cross-linking conditions, namely the dynamic viscosity η*, storage and loss modulus (G′; G″), and loss factor tan δ. The highest free swelling capacities (FSC) of up to 50 g water per g xerogel were obtained from pre-oxidized pine kraft lignin Indulin® AT and spruce organosolv lignin. Dynamic rheological measurements confirmed the typical rheological behaviour of gel structures, i.e. a linear decrease of dynamic viscosity about three orders of magnitude within a frequency range of 0.08 and 20 s-1. The results furthermore revealed a good mechanical sturdiness of the cross-linked lignin hydrogels. Sandy soils supplemented with small quantities of the hydrogels were found to feature a significantly increased plant-available water content. Based on the observed effects, oligo(oxyethylene) lignins are promising materials with respect to a prolonged water retention in soils.</description><identifier>ISSN: 0018-3830</identifier><identifier>EISSN: 1437-434X</identifier><identifier>DOI: 10.1515/hf.2011.044</identifier><language>eng</language><publisher>Walter de Gruyter</publisher><subject>cross-linking ; Crosslinking ; Dynamics ; Fenton oxidation ; hydrogel ; Hydrogels ; lignin ; Moisture content ; Rheological properties ; rheology ; soil water retention ; Soils ; Swelling ; Viscosity</subject><ispartof>Holzforschung, 2011-05, Vol.65 (3), p.309-317</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c303t-d7d0d1d8694f3c82584bb36f84768c35e64a2fad946614dd490e6321eebefac93</citedby><cites>FETCH-LOGICAL-c303t-d7d0d1d8694f3c82584bb36f84768c35e64a2fad946614dd490e6321eebefac93</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></links><search><creatorcontrib>Passauer, Lars</creatorcontrib><creatorcontrib>Fischer, Klaus</creatorcontrib><creatorcontrib>Liebner, Falk</creatorcontrib><title>Preparation and physical characterization of strongly swellable oligo(oxyethylene) lignin hydrogels</title><title>Holzforschung</title><addtitle>Holzforschung</addtitle><description>Highly swellable, mechanically stable hydrogels were obtained by cross-linking different technical lignins with poly(ethylene) glycol diglycidyl ether (PEGDGE). 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Based on the observed effects, oligo(oxyethylene) lignins are promising materials with respect to a prolonged water retention in soils.</description><subject>cross-linking</subject><subject>Crosslinking</subject><subject>Dynamics</subject><subject>Fenton oxidation</subject><subject>hydrogel</subject><subject>Hydrogels</subject><subject>lignin</subject><subject>Moisture content</subject><subject>Rheological properties</subject><subject>rheology</subject><subject>soil water retention</subject><subject>Soils</subject><subject>Swelling</subject><subject>Viscosity</subject><issn>0018-3830</issn><issn>1437-434X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNo9kF1LwzAUhoMoOKdX_oHeqUhn0qRteinD-QlOmCDehDQ5WatZU5MOV3-9HROvDud9Hw6HB6FTgickJelVZSYJJmSCGdtDI8JoHjPK3vbRCGPCY8opPkRHIXwMa4opGSE199BKL7vaNZFsdNRWfaiVtJGqhlh14OufXetMFDrvmqXto_AN1srSQuRsvXTnbtNDV_UWGriIhqSpm6jqtXdLsOEYHRhpA5z8zTF6nd0spnfx0_Pt_fT6KVYU0y7WucaaaJ4VzFDFk5SzsqSZ4SzPuKIpZEwmRuqCZRlhWrMCQ0YTAlCCkaqgY3S2u9t697WG0IlVHdT20QbcOgjOCzaYSehAXu5I5V0IHoxofb2SvhcEi61JURmxNSkGfqDjHV2HDjb_qPSfIstpnoqXBRPv80c-yx9mAtNfb-l3-A</recordid><startdate>20110501</startdate><enddate>20110501</enddate><creator>Passauer, Lars</creator><creator>Fischer, Klaus</creator><creator>Liebner, Falk</creator><general>Walter de Gruyter</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>20110501</creationdate><title>Preparation and physical characterization of strongly swellable oligo(oxyethylene) lignin hydrogels</title><author>Passauer, Lars ; Fischer, Klaus ; Liebner, Falk</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c303t-d7d0d1d8694f3c82584bb36f84768c35e64a2fad946614dd490e6321eebefac93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>cross-linking</topic><topic>Crosslinking</topic><topic>Dynamics</topic><topic>Fenton oxidation</topic><topic>hydrogel</topic><topic>Hydrogels</topic><topic>lignin</topic><topic>Moisture content</topic><topic>Rheological properties</topic><topic>rheology</topic><topic>soil water retention</topic><topic>Soils</topic><topic>Swelling</topic><topic>Viscosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Passauer, Lars</creatorcontrib><creatorcontrib>Fischer, Klaus</creatorcontrib><creatorcontrib>Liebner, Falk</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Holzforschung</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Passauer, Lars</au><au>Fischer, Klaus</au><au>Liebner, Falk</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Preparation and physical characterization of strongly swellable oligo(oxyethylene) lignin hydrogels</atitle><jtitle>Holzforschung</jtitle><addtitle>Holzforschung</addtitle><date>2011-05-01</date><risdate>2011</risdate><volume>65</volume><issue>3</issue><spage>309</spage><epage>317</epage><pages>309-317</pages><issn>0018-3830</issn><eissn>1437-434X</eissn><abstract>Highly swellable, mechanically stable hydrogels were obtained by cross-linking different technical lignins with poly(ethylene) glycol diglycidyl ether (PEGDGE). The gelation time and the properties of the products can be controlled by the extent of pre-oxidation and the cross-linking conditions, namely the dynamic viscosity η*, storage and loss modulus (G′; G″), and loss factor tan δ. The highest free swelling capacities (FSC) of up to 50 g water per g xerogel were obtained from pre-oxidized pine kraft lignin Indulin® AT and spruce organosolv lignin. Dynamic rheological measurements confirmed the typical rheological behaviour of gel structures, i.e. a linear decrease of dynamic viscosity about three orders of magnitude within a frequency range of 0.08 and 20 s-1. The results furthermore revealed a good mechanical sturdiness of the cross-linked lignin hydrogels. Sandy soils supplemented with small quantities of the hydrogels were found to feature a significantly increased plant-available water content. Based on the observed effects, oligo(oxyethylene) lignins are promising materials with respect to a prolonged water retention in soils.</abstract><pub>Walter de Gruyter</pub><doi>10.1515/hf.2011.044</doi><tpages>9</tpages></addata></record> |
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source | De Gruyter journals |
subjects | cross-linking Crosslinking Dynamics Fenton oxidation hydrogel Hydrogels lignin Moisture content Rheological properties rheology soil water retention Soils Swelling Viscosity |
title | Preparation and physical characterization of strongly swellable oligo(oxyethylene) lignin hydrogels |
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