New sustainable routes for gas separation membranes: The properties of poly(hydroxybutyrate-co-hydroxyvalerate) cast from green solvents

Papchenko, Kseniya; Esposti, Mauro Degli; Minelli, Matteo; Fabbri, Paola; Morselli, Davide; Angelis, Maria Grazia De

doi:10.1016/j.memsci.2022.120847

Cited by 16 publications

(31 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Specifically, the band at 2882 cm −1 and peaks in the range of 1300–800 cm −1 are attributed to the CH 2 occurring in the PEG structure (stretching, wagging, twisting, and rocking) [ 30 , 31 ]. Moreover, the signal at 1721 cm −1 , commonly attributed to the carbonyl stretching of the PHB polyester structure [ 32 ], is clearly visible. Nevertheless, no signal that clearly confirms the formation of the bond between the two polymers was detected by FT-IR.…”

Section: Resultsmentioning

confidence: 99%

Fine Tuning of the Mechanical Properties of Bio-Based PHB/Nanofibrillated Cellulose Biocomposites to Prevent Implant Failure Due to the Bone/Implant Stress Shielding Effect

et al. 2023

Self Cite

View full text Add to dashboard Cite

A significant mechanical properties mismatch between natural bone and the material forming the orthopedic implant device can lead to its failure due to the inhomogeneous loads distribution, resulting in less dense and more fragile bone tissue (known as the stress shielding effect). The addition of nanofibrillated cellulose (NFC) to biocompatible and bioresorbable poly(3-hydroxybutyrate) (PHB) is proposed in order to tailor the PHB mechanical properties to different bone types. Specifically, the proposed approach offers an effective strategy to develop a supporting material, suitable for bone tissue regeneration, where stiffness, mechanical strength, hardness, and impact resistance can be tuned. The desired homogeneous blend formation and fine-tuning of PHB mechanical properties have been achieved thanks to the specific design and synthesis of a PHB/PEG diblock copolymer that is able to compatibilize the two compounds. Moreover, the typical high hydrophobicity of PHB is significantly reduced when NFC is added in presence of the developed diblock copolymer, thus creating a potential cue for supporting bone tissue growth. Hence, the presented outcomes contribute to the medical community development by translating the research results into clinical practice for designing bio-based materials for prosthetic devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Fine Tuning of the Mechanical Properties of Bio-Based PHB/Nanofibrillated Cellulose Biocomposites to Prevent Implant Failure Due to the Bone/Implant Stress Shielding Effect

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…The thickness was measured to be 19 ± 1 µm. The crystallinity was not provided by the producers and was determined to be equal to 42 ± 1% through DSC analysis, as described in Section S1 of the Supporting Information (SI) [ 19 ]. Gases used for sorption tests, namely methane (CH 4 ) and carbon dioxide (CO 2 ), were purchased from Fluido Tecnica (Campi Bisenzio, FI, Italy) with purities ≥ 99.5%.…”

Section: Methodsmentioning

confidence: 99%

“…The solubility coefficient obtained from the Widom analysis and averaged over three configurations for each system was used to calculate the corresponding number of gas molecules to insert into each system at atmospheric pressure. The calculation was done under the assumption of a quasi-constant solubility coefficient at temperatures higher than the glass transition (T g ) in PHBV, as confirmed by previous experimental work [ 19 ]. After the energy minimization, a short NVT run, a 10 ns NPT run, and a second 1 ns NVT run were performed for equilibration.…”

Section: Methodsmentioning

confidence: 99%

“…Poly(3-hydroxybutyrate) (PHB), poly(3-hydroxyvalerate) (PHV), and their copolymers are currently the most studied and produced bio-polyesters, as the application range of such materials appears to be quite broad [ 14 , 15 , 16 ]. At the same time, the experimental characterisation of fluid transport properties, to this day, was reported only for a low number of gases in a small subset of PHAs [ 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modelling across Multiple Scales to Design Biopolymer Membranes for Sustainable Gas Separations: 1—Atomistic Approach

2023

Self Cite

View full text Add to dashboard Cite

In this work, we assessed the CO2 and CH4 sorption and transport in copolymers of 3-hydroxybutyrate and 3-hydroxyvalerate (PHBV), which showed good CO2 capture potential in our previous papers, thanks to their good solubility–selectivity, and are potential biodegradable alternatives to standard membrane-separation materials. Experimental tests were carried out on a commercial material containing 8% of 3-hydroxyvalerate (HV), while molecular modelling was used to screen the performance of the copolymers across the entire composition range by simulating structures with 0%, 8%, 60%, and 100% HV, with the aim to provide a guide for the selection of the membrane material. The polymers were simulated using molecular dynamics (MD) models and validated against experimental density, solubility parameters, and X-ray diffraction. The CO2/CH4 solubility–selectivity predicted by the Widom insertion method is in good agreement with experimental data, while the diffusivity–selectivity obtained via mean square displacement is somewhat overestimated. Overall, simulations indicate promising behaviour for the homopolymer containing 100% of HV. In part 2 of this series of papers, we will investigate the same biomaterials using a macroscopic model for polymers and compare the accuracy and performance of the two approaches.

show abstract

“…Among DACs, several studies reported the use of commercially available cyclic carbonates, namely, ethylene carbonate (EC), propylene carbonate (PC), and butylene carbonate (BC) as green solvents for membrane preparation, ,, while applications of acyclic DACs in this field is almost unexplored apart from some tests involving dimethyl carbonate (DMC) and diethyl carbonate (DEC). ,− Although the aforementioned cyclic carbonates are produced industrially at low cost, the lack of diversity across their chemical structures means they can only be used to solubilize a limited number of polymers. Furthermore, in some cases, high temperatures (up to 130 °C) are required to achieve homogeneous polymer solutions. , To overcome these issues, DACs possessing different functional groups could be employed, but this usually means low scale industrial production and a higher market price. , …”

Section: Introductionmentioning

confidence: 99%

Dialkyl Carbonates as Green Solvents for Polyvinylidene Difluoride Membrane Preparation

Trapasso

Russo

Galiano

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Membrane processes are employed in a wide variety of industrial applications such as separation of complex mixtures, hydrogen isolation, CO2 removal, wastewater treatment, etc. Their use allows energy savings on the production cost compared to other traditional separation technologies. Nevertheless, the preparation of membranes not always fulfills sustainability obligations, especially when considering the commonly employed solvents, i.e., N-methyl-2-pyrrolidone and N,N-dimethylformamide, to mention just a few. Dialkyl carbonates (DACs) are well-known green solvents and reagents that have been extensively investigated as safe alternatives to chlorine-based compounds and media such as alkyl halides, phosgene, and chlorinated solvents. Following our recent study on a scale-up procedure to non-commercially available or expensive DACs, herein we report for the first time the application of organic carbonates as green media for membrane preparation. Theoretical thermodynamic studies were first carried out to predict the solubilities in DACs of different polymers commonly employed for membranes preparation. As a result, the use of selected organic carbonates as media for polyvinylidene difluoride membrane preparation was investigated by nonsolvent-induced phase separation (NIPS) and a combination of vapor-induced phase separation (VIPS)-NIPS techniques. Membranes obtained with custom-made DACs displayed greater structural resistances and smaller pore sizes compared to the ones achieved using commercially available cyclic organic carbonates. Data collected showed that it was possible to achieve a wide variety of dense and porous membranes by using a single family of compounds, highlighting once again the great versatility of DACs as green solvents.

show abstract

New sustainable routes for gas separation membranes: The properties of poly(hydroxybutyrate-co-hydroxyvalerate) cast from green solvents

Cited by 16 publications

References 49 publications

Fine Tuning of the Mechanical Properties of Bio-Based PHB/Nanofibrillated Cellulose Biocomposites to Prevent Implant Failure Due to the Bone/Implant Stress Shielding Effect

Fine Tuning of the Mechanical Properties of Bio-Based PHB/Nanofibrillated Cellulose Biocomposites to Prevent Implant Failure Due to the Bone/Implant Stress Shielding Effect

Modelling across Multiple Scales to Design Biopolymer Membranes for Sustainable Gas Separations: 1—Atomistic Approach

Dialkyl Carbonates as Green Solvents for Polyvinylidene Difluoride Membrane Preparation

Contact Info

Product

Resources

About