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المؤلفSobolčiak, Patrik
المؤلفAbdulgader, Asma
المؤلفMrlik, Miroslav
المؤلفPopelka, Anton
المؤلفA. Abdala, Ahmed
المؤلفA. Aboukhlewa, Abdelnasser
المؤلفKarkri, Mustapha
المؤلفKiepfer, Hendrik
المؤلفBart, Hans-Jörg
المؤلفKrupa, Igor
تاريخ الإتاحة2023-06-26T04:54:19Z
تاريخ النشر2020
اسم المنشورPolymers
المصدرScopus
معرّف المصادر الموحدhttp://dx.doi.org/10.3390/polym12122863
معرّف المصادر الموحدhttp://hdl.handle.net/10576/44822
الملخصComposites 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.
راعي المشروعFunding: This work was made possible by NPRP grant No.: NPRP10-0205-170349 from the Qatar National Research Fund (A Member of the Qatar Foundation). The statements made herein are solely the responsibility of the authors. Acknowledgments: SEM was accomplished in the Central Laboratories unit, Qatar University. Author M.M.gratefully acknowledge the Ministry of Education, Youth and Sports of the Czech Republic-DKRVO (RP/CPS/2020/003).
اللغةen
الناشرMDPI AG
الموضوعExpanded graphite
High density polyethylene
Multi-effect distillation
Plasma treatment
Polymeric composites
Scaling
العنوانThermally conductive polyethylene/expanded graphite composites as heat transfer surface: Mechanical, thermo-physical and surface behavior
النوعArticle
الصفحات1-19
رقم العدد12
رقم المجلد12
dc.accessType Open Access


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