Thermally Conductive Polyethylene/Expanded Graphite Composites as Heat Transfer Surface: Mechanical, Thermo-Physical and Surface Behavior
<p dir="ltr">Composites of high-density polyethylene (HDPE) and expanded graphite (EG) are prepared for heat exchangers in multi-effect distillation (MED) desalination. At 50 wt.% EG loading, the thermal conductivity of HDPE was increased by 372%. Moreover, the surface wettability of...
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2020
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| _version_ | 1864513515995267072 |
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| author | Patrik Sobolčiak (4401364) |
| author2 | Asma Abdulgader (18561187) Miroslav Mrlik (5477618) Anton Popelka (2804842) Ahmed A. Abdala (18561190) Abdelnasser A. Aboukhlewa (18561193) Mustapha Karkri (18561196) Hendrik Kiepfer (18561199) Hans-Jörg Bart (2649340) Igor Krupa (1389267) |
| author2_role | author author author author author author author author author |
| author_facet | Patrik Sobolčiak (4401364) Asma Abdulgader (18561187) Miroslav Mrlik (5477618) Anton Popelka (2804842) Ahmed A. Abdala (18561190) Abdelnasser A. Aboukhlewa (18561193) Mustapha Karkri (18561196) Hendrik Kiepfer (18561199) Hans-Jörg Bart (2649340) Igor Krupa (1389267) |
| author_role | author |
| dc.creator.none.fl_str_mv | Patrik Sobolčiak (4401364) Asma Abdulgader (18561187) Miroslav Mrlik (5477618) Anton Popelka (2804842) Ahmed A. Abdala (18561190) Abdelnasser A. Aboukhlewa (18561193) Mustapha Karkri (18561196) Hendrik Kiepfer (18561199) Hans-Jörg Bart (2649340) Igor Krupa (1389267) |
| dc.date.none.fl_str_mv | 2020-11-30T06:00:00Z |
| dc.identifier.none.fl_str_mv | 10.3390/polym12122863 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Thermally_Conductive_Polyethylene_Expanded_Graphite_Composites_as_Heat_Transfer_Surface_Mechanical_Thermo-Physical_and_Surface_Behavior/25827604 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Engineering Chemical engineering Materials engineering multi-effect distillation high density polyethylene expanded graphite polymeric composites plasma treatment scaling |
| dc.title.none.fl_str_mv | Thermally Conductive Polyethylene/Expanded Graphite Composites as Heat Transfer Surface: Mechanical, Thermo-Physical and Surface Behavior |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">Composites of high-density polyethylene (HDPE) and expanded graphite (EG) are prepared for heat exchangers in multi-effect distillation (MED) desalination. At 50 wt.% EG loading, the thermal conductivity of HDPE was increased by 372%. Moreover, the surface wettability of the HDPE/EG composite was enhanced by corona and RF plasma treatment as demonstrated by the increase in surface free energy from 28.5 mJ/m2 for untreated HDPE/EG to 55.5 and 54.5 mJ/m2 for HDPE/EG treated by corona and RF plasma, respectively. This enhanced surface wettability was retained over a long time with only a 9% and 18% decrease in RF and corona plasma-treated samples’ surface energy after two months. The viscoelastic moduli and the complex viscosity profiles indicated that EG content dictates the optimum processing technique. At loading below 30 wt.%, the extrusion process is preferred, while above 30 wt.% loading, injection molding is preferred. The plasma treatment also improved the HDPE/EG composite overall heat transfer coefficient with an overall heat transfer coefficient of the composite reaching about 98% that of stainless steel. Moreover, the plasma-treated composite exhibited superior resistance to crystallization fouling in both CaSO4 solution and artificial seawater compared to untreated composites and stainless-steel surfaces.</p><h2>Other Information</h2><p dir="ltr">Published in: Polymers<br>License: <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.3390/polym12122863" target="_blank">https://dx.doi.org/10.3390/polym12122863</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_1510ee34c4339683a53801c050d354ea |
| identifier_str_mv | 10.3390/polym12122863 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/25827604 |
| publishDate | 2020 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Thermally Conductive Polyethylene/Expanded Graphite Composites as Heat Transfer Surface: Mechanical, Thermo-Physical and Surface BehaviorPatrik Sobolčiak (4401364)Asma Abdulgader (18561187)Miroslav Mrlik (5477618)Anton Popelka (2804842)Ahmed A. Abdala (18561190)Abdelnasser A. Aboukhlewa (18561193)Mustapha Karkri (18561196)Hendrik Kiepfer (18561199)Hans-Jörg Bart (2649340)Igor Krupa (1389267)EngineeringChemical engineeringMaterials engineeringmulti-effect distillationhigh density polyethyleneexpanded graphitepolymeric compositesplasma treatmentscaling<p dir="ltr">Composites of high-density polyethylene (HDPE) and expanded graphite (EG) are prepared for heat exchangers in multi-effect distillation (MED) desalination. At 50 wt.% EG loading, the thermal conductivity of HDPE was increased by 372%. Moreover, the surface wettability of the HDPE/EG composite was enhanced by corona and RF plasma treatment as demonstrated by the increase in surface free energy from 28.5 mJ/m2 for untreated HDPE/EG to 55.5 and 54.5 mJ/m2 for HDPE/EG treated by corona and RF plasma, respectively. This enhanced surface wettability was retained over a long time with only a 9% and 18% decrease in RF and corona plasma-treated samples’ surface energy after two months. The viscoelastic moduli and the complex viscosity profiles indicated that EG content dictates the optimum processing technique. At loading below 30 wt.%, the extrusion process is preferred, while above 30 wt.% loading, injection molding is preferred. The plasma treatment also improved the HDPE/EG composite overall heat transfer coefficient with an overall heat transfer coefficient of the composite reaching about 98% that of stainless steel. Moreover, the plasma-treated composite exhibited superior resistance to crystallization fouling in both CaSO4 solution and artificial seawater compared to untreated composites and stainless-steel surfaces.</p><h2>Other Information</h2><p dir="ltr">Published in: Polymers<br>License: <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.3390/polym12122863" target="_blank">https://dx.doi.org/10.3390/polym12122863</a></p>2020-11-30T06:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.3390/polym12122863https://figshare.com/articles/journal_contribution/Thermally_Conductive_Polyethylene_Expanded_Graphite_Composites_as_Heat_Transfer_Surface_Mechanical_Thermo-Physical_and_Surface_Behavior/25827604CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/258276042020-11-30T06:00:00Z |
| spellingShingle | Thermally Conductive Polyethylene/Expanded Graphite Composites as Heat Transfer Surface: Mechanical, Thermo-Physical and Surface Behavior Patrik Sobolčiak (4401364) Engineering Chemical engineering Materials engineering multi-effect distillation high density polyethylene expanded graphite polymeric composites plasma treatment scaling |
| status_str | publishedVersion |
| title | Thermally Conductive Polyethylene/Expanded Graphite Composites as Heat Transfer Surface: Mechanical, Thermo-Physical and Surface Behavior |
| title_full | Thermally Conductive Polyethylene/Expanded Graphite Composites as Heat Transfer Surface: Mechanical, Thermo-Physical and Surface Behavior |
| title_fullStr | Thermally Conductive Polyethylene/Expanded Graphite Composites as Heat Transfer Surface: Mechanical, Thermo-Physical and Surface Behavior |
| title_full_unstemmed | Thermally Conductive Polyethylene/Expanded Graphite Composites as Heat Transfer Surface: Mechanical, Thermo-Physical and Surface Behavior |
| title_short | Thermally Conductive Polyethylene/Expanded Graphite Composites as Heat Transfer Surface: Mechanical, Thermo-Physical and Surface Behavior |
| title_sort | Thermally Conductive Polyethylene/Expanded Graphite Composites as Heat Transfer Surface: Mechanical, Thermo-Physical and Surface Behavior |
| topic | Engineering Chemical engineering Materials engineering multi-effect distillation high density polyethylene expanded graphite polymeric composites plasma treatment scaling |