Preparation and characterization of green polylactic acid (PLA) membranes for organic/organic separation by pervaporation

Galiano, Francesco; Ghanim, Abdulsattar H.; Rashid, Khalid T.; Marino, Tiziana; Simone, Silvia De; Alsalhy, Qusay F.; Figoli, Alberto

doi:10.1007/s10098-018-1621-4

Cited by 58 publications

(38 citation statements)

References 42 publications

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“…Within the membrane support, the PLA serves as glue between the bamboo fibers, therefore, increased PLA amount is speculated to result in greater adhesion between the fibers, thus lower membrane thickness. Pure evaporated PLA films yield dense films, 31 and consequently the bamboo fiber is responsible for obtaining a porous structure. The topology and morphology of PBI membrane were investigated by SEM and AFM ( Figure S5).…”

Section: Resultsmentioning

confidence: 99%

Nonwoven Membrane Supports from Renewable Resources: Bamboo Fiber Reinforced Poly(Lactic Acid) Composites

Phuong

Ayob

Blanford

et al. 2019

ACS Sustainable Chem. Eng.

115

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Membrane separation has been widely recognized as an energy-efficient technology with a rapidly growing market. However, such growth raises concerns about sustainability due to current fabrication methods that employ toxic solvents and non-degradable petroleum-based polymers. The focus of tackling these challenges has been on the active layer of membranes via renewable materials, while the equally important membrane supports are yet to turn green. Herein we report the fabrication of sustainable, biodegradable, non-woven composite membrane supports made from three renewable materials: bamboo fiber, poly(lactic acid) (PLA) and dimethyl carbonate. The bio-based membrane supports exhibited a porous structure (porosity of 0.719 ± 0.132) with tensile strength (32.7-73.3 MPa) comparable to conventional materials, such as polypropylene. The microstructure and porosity of the supports were revealed by laser scanning confocal microscopy. The increase in bamboo content resulted in increased mechanical stability, decreased swelling and enhanced permeance, up to 1068±32 L m-2 h-1 bar-1 in water. The long-term chemical stability of membrane supports was verified in 19 of the 25 organic solvents screened. In particular, they were found to be stable in some conventional and emerging green polar aprotic solvents including Cyrene, 2-methyltetrahydrofuran, γ-valerolactone and propylene carbonate. Stable cross-flow filtration performance over 2 weeks was successfully demonstrated. The results demonstrated that the bamboo/PLA membrane supports could provide a sustainable alternative for conventional membrane backing materials by eliminating the need for petroleum-based non-degradable polymers and toxic solvents.

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Section: Resultsmentioning

confidence: 99%

Nonwoven Membrane Supports from Renewable Resources: Bamboo Fiber Reinforced Poly(Lactic Acid) Composites

Phuong

Ayob

Blanford

et al. 2019

ACS Sustainable Chem. Eng.

115

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“…A study of the membranes based on polylactide was also carried out by Galliano et al in [ 59 ]. The authors paid special attention to the influence of the solvent evaporation time (0.5–7 min) on the morphology and mechanical properties of the membranes obtained from a solution of ethyl lactate.…”

Section: Polymer Membranes For Methanol/mtbe Separationmentioning

confidence: 99%

Application of Polymer Membranes for a Purification of Fuel Oxygenated Additive. Methanol/Methyl Tert-butyl Ether (MTBE) Separation via Pervaporation: A Comprehensive Review

et al. 2020

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Methyl Tert-butyl Ether (MTBE) remains the most popular fuel additive to improve fuel performance and reduce the emission of hazardous components. The most common method of MTBE production is a catalytic synthesis with a great excess of methanol to improve the reaction yield. The problems of obtaining pure MTBE from the final product have determined the search for new techniques; primarily membrane methods. Pervaporation as an optimal membrane process for highly selective separation of organic mixtures is of particular interest. This review is focused on analysis of the research works on the various polymer membranes and their efficiency for the separation of the azeotropic methanol/MTBE mixture. Currently the most popular materials with optimal transport properties are poly(vinyl alcohol), cellulose acetate and polyheteroarylenes. Mixed matrix membranes (MMM) are highly effective as well as they show overall operational stability.

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“…Typically, PLA is synthetized by polycondensation of hydroxyl acid or by ring-opening polymerization of cyclic lactide monomers [1]. This polymer has been recently evaluated for its ability in separating methanol (MeOH)-methyl tert-butyl ether (MTBE) azeotropic mixtures [60]. The separation performance in terms of permeation and selectivity was about 0.090 kg m −2 h −1 and 75, respectively.…”

Section: Biopolymers: the Promising Materials In Membrane Preparatmentioning

confidence: 99%

New Trends in Biopolymer-Based Membranes for Pervaporation

Castro-Muñoz

González‐Valdez

2019

Molecules

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Biopolymers are currently the most convenient alternative for replacing chemically synthetized polymers in membrane preparation. To date, several biopolymers have been proposed for such purpose, including the ones derived from animal (e.g., polybutylene succinate, polylactic acid, polyhydroxyalcanoates), vegetable sources (e.g., starch, cellulose-based polymers, alginate, polyisoprene), bacterial fermentation products (e.g., collagen, chitin, chitosan) and specific production processes (e.g., sericin). Particularly, these biopolymer-based membranes have been implemented into pervaporation (PV) technology, which assists in the selective separation of azeotropic water-organic, organic-water, organic-organic mixtures, and specific separations of chemical reactions. Thereby, the aim of the present review is to present the current state-of-the-art regarding the different concepts on preparing membranes for PV. Particular attention is paid to the most relevant insights in the field, highlighting the followed strategies by authors for such successful approaches. Finally, by reviewing the ongoing development works, the concluding remarks and future trends are addressed.

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Preparation and characterization of green polylactic acid (PLA) membranes for organic/organic separation by pervaporation

Cited by 58 publications

References 42 publications

Nonwoven Membrane Supports from Renewable Resources: Bamboo Fiber Reinforced Poly(Lactic Acid) Composites

Nonwoven Membrane Supports from Renewable Resources: Bamboo Fiber Reinforced Poly(Lactic Acid) Composites

Application of Polymer Membranes for a Purification of Fuel Oxygenated Additive. Methanol/Methyl Tert-butyl Ether (MTBE) Separation via Pervaporation: A Comprehensive Review

New Trends in Biopolymer-Based Membranes for Pervaporation

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