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المؤلفTeoh, Guang Hui
المؤلفOoi, Boon Seng
المؤلفJawad, Zeinab Abbas
المؤلفLow, Siew Chun
تاريخ الإتاحة2024-04-22T04:57:06Z
تاريخ النشر2021
اسم المنشورJournal of Environmental Chemical Engineering
المصدرScopus
الرقم المعياري الدولي للكتاب22133437
معرّف المصادر الموحدhttp://dx.doi.org/10.1016/j.jece.2021.105418
معرّف المصادر الموحدhttp://hdl.handle.net/10576/54000
الملخصMany studies have focused on increasing the superhydrophobicity of membranes to enhance the sustainable desalination capability of membrane distillation (MD) process. This work focuses on the influences of crystalline β-polymorphs and micro-roughness surface-printing, to transform the surface of hydrophobic poly(vinylidene fluoride) (PVDF) membranes to achieve superhydrophobicity. This study uses two types of PVDF (HV- and LV-PVDF) with different polymer chain lengths and polymer densities. According to FTIR analyses, the membranes synthesized using HV- and LV-PVDF are mainly composed of β-phase polymorphs, with relative fractions of 0.633 and 0.472, respectively. The high content of hydrophilic β-phase polymorphs renders the contact angle (CA) of the non-surface-printed HV-PVDF membrane as low as 87.2º. Through the uniformly distributed micro-scaled structures on the surface-printed PVDF membranes, the surface-printed HV-PVDF membrane successfully surpassed the superhydrophobicity, with a CA of 151.1º and a dynamic sliding angle (SA) of 13º. Regardless of the surface-printing, the HV-PVDF membranes remain a similar surface porosity (42%). The results proved that the layered micro-roughness of surface-printing can resist membrane wetting during MD separation by achieving at least a four-fold increase in average permeation flux from 2.5 kg/m2 h to 10 kg/m2 h and salt rejection of 99.99%. This study qualitatively explains the importance of material chemistry (β-phase polymorphs) and surface roughness (micro-roughness), which affect membrane wetting resistance during MD.
راعي المشروعThis work was financially supported by Ministry of Education Malaysia Long Term Research Grant Scheme 1/2018, Malaysia ( LRGS/203/PJKIMIA/67215002 ).
اللغةen
الناشرElsevier
الموضوعHierarchical micro-structured
Highly hydrophobic
Membrane distillation
Surface chemistry
Water conservation
العنوانImpacts of PVDF polymorphism and surface printing micro-roughness on superhydrophobic membrane to desalinate high saline water
النوعArticle
رقم العدد4
رقم المجلد9
dc.accessType Abstract Only


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