Recent Developments and Perspectives of Recycled Poly(ethylene terephthalate)-Based Membranes: A Review

Abstract

Post-consumer poly(ethylene terephthalate) (PET) waste disposal is an important task of modern industry, and the development of new PET-based value added products and methods for their production is one of the ways to solve it. Membranes for various purposes, in this regard are such products. The aim of the review, on the one hand, is to systematize the known methods of processing PET and copolyesters, highlighting their advantages and disadvantages and, on the other hand, to show what valuable membrane products could be obtained, and in what areas of the economy they can be used. Among the various approaches to the processing of PET waste, we single out chemical methods as having the greatest promise. They are divided into two large categories: (1) aimed at obtaining polyethylene terephthalate, similar in properties to the primary one, and (2) aimed at obtaining copolyesters. It is shown that among the former, glycolysis has the greatest potential, and among the latter, destruction followed by copolycondensation and interchain exchange with other polyesters, have the greatest prospects. Next, the key technologies for obtaining membranes, based on polyethylene terephthalate and copolyesters are considered: (1) ion track technology, (2) electrospinning, and (3) non-solvent induced phase separation. The methods for the additional modification of membranes to impart hydrophobicity, hydrophilicity, selective transmission of various substances, and other properties are also given. In each case, examples of the use are considered, including gas purification, water filtration, medical and food industry use, analytical and others. Promising directions for further research are highlighted, both in obtaining recycled PET-based materials, and in post-processing and modification methods.

A New Sustainable PPT Coating Based on Recycled PET to Improve the Durability of Hydraulic Concrete

“…PET recycling can be carried out in different recycling phases: primary, secondary, tertiary, and quaternary. Mechanical and chemical methods have been commonly reported, which comprise the secondary and tertiary phases of their recycling, respectively [6]. Mechanical recycling consists of the Disclaimer/Publisher's Note: The statements, opinions, and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s).…”

Effect of Recycling PET Fabric and Bottle Grade on r-PET Fiber Structure

“…The associated energy consumption for these processes ranges from 8 to 55 MJ kg −1 [ 14 ]. Research articles concerning PET waste material derived products have focused on synthesizing other new polymeric materials in the fields of regenerative medicine and organic coatings or membranes [ 15 , 16 ].…”

A Comparable Study of Single Stranded DNA Sensing Using Track‐Etched Nanopore Sensors

“…It is relatively chemically stable and resistant to clogging which is useful for long-term sensing applications. [22][23][24][25][26] Short DNA and especially single-stranded DNA (ss-DNA) detection have great attention due to their role in gene expression regulation and are important for several applications in basic research, biotechnology, and medicine. [27][28][29][30][31] Some of the key reasons are the identification and characterization of genetic material, detection of genetic mutations to diagnose infectious diseases and monitoring cancer, [32] usage as a biomarker to detect specific organisms in the environment [33][34][35] and production of recombinant proteins [28,36] and the development of gene therapies.…”