Fabrication of Hydrophilic and Strong Pet-Based Membrane From Wasted Plastic Bottle

Abstract

In this study, the wasted plastic bottle has been recycled as a polymeric material to fabricate PET-based membrane by adding cellulose acetate and silica to enhance the performance. Cellulose acetate was added as a sub-polymer to increase mechanical property of the PET membrane. Meanwhile, silica which derived from rice husk was used as a membrane pore-forming agent. PET/CA/SiO2 membrane was fabricated using the phase inversion technique via thermal induced phase separation method. The permeation and selectivity performances of the prepared membrane were tested. Other fundamental characterizations of the membrane such as morphological, functional groups, tensile strength, contact angle, roughness, and thickness were also analyzed. From the result, it was found that the addition of silica successfully improved the hydrophilicity as well as the filtration performance of the membrane.

Poly(ethylene terephthalate) phase inversion membranes: Thermodynamics and effects of a poor solvent on the membrane characteristics

“…For F I G U R E 7 SEM images of the top surface of PET membranes 15% PET with solvent TFA/DCM 50/50, rejections around 75% for the corn starch were obtained, indicating, once again, the formation of defects or very large pores in the membrane structure. Comparing all the rejection results of this work with literature data, [17,19,20] it is reasonable to assume that the incorporation of additives, like PEG, PVP, and silica, could improve selectivity of the PET membranes since these additives led the membrane to have smaller pores.…”

“…These values match a hydrophilic membrane surface, desirable for aqueous solution separations with hydrophobic solutes. [53][54][55] The hydrophilic character of the PET phase inversion membranes prepared in this work is an advantage compared to PET electrospun membranes À105 [56] and 134 [39] and hybrid PET/CA/silica phase inversion membranes -86 to 98 [20] found in the literature.…”

“…It was concluded that the PET/PVP membrane prepared with an evaporation step was the most efficient in humic acid rejection. In another investigation, [ 20 ] PET plastic bottles were recycled to prepare PET‐based membranes by adding cellulose acetate (CA) and silica derived from rice husk. The authors concluded that CA and silica completely covered the weakness of the PET membrane, which showed an improvement in hydrophilicity and mechanical strength, and that the use of silica led to an increase in the pure water flux and humic acid rejection.…”

Waste Reutilization in Polymeric Membrane Fabrication: A New Direction in Membranes for Separation

“…It was observed that the pore size and water permeability of the PET membrane were enhanced by using non-solvent of lower polarity and PEG with higher molecular weight and at higher concentration. PET-based membrane derived from phenol-dissolved waste PET bottles was also prepared through thermally induced phase separation (TIPS), with cellulose acetate as a sub-polymer to improve mechanical strength and rice husk-derived silica as a pore-forming agent [157]. The addition of 1 wt% silica improved the surface hydrophilicity and the distribution of pores on the membrane surface, hence resulting in two-fold increment in its water permeability compared to that without silica additive.…”

Improving Water Permeability of Hydrophilic PVDF Membrane Prepared via Blending with Organic and Inorganic Additives for Humic Acid Separation

“…The phase inversion process is the most popular method for membrane fabrication due to its simplicity and ability to produce variable membrane types and properties [1]. Some polymers widely used for membrane fabrications are polyvinylidene fluoride (PVDF), polyethersulfone (PES), polysulfone (PSF), and polyacrylonitrile (PAN) [2,3,4]. Among these polymers, PVDF offers the advantages of having good mechanical properties, good thermal stability, and excellent chemical resistance [2,5,6,7,8,9,10].…”