Synthesis and characterization of a polyester based on citric acid/ethylene glycol/glycerol

Paredes, Alfredo Olarte; Delgado, Areli Marlen Salgado; García-Fuentes, J.J.; Salgado-Delgado, René; Cedillo-Valverde, G.; López-Lara, Teresa; Hernández-Zaragoza, Juan Bosco; Castaño, V. M.

doi:10.1080/10601325.2021.1965890

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…Compared with PLLA, the peak intensities of CH 2 symmetric and asymmetric vibrations at ≈2998 and 2942 cm −1 were increased for all PLE copolymers due to the introduced ethylene glycol. [ 24 ] Importantly, the COC stretching vibration peak emerged at ≈1211 cm −1 in PLE‐3‐6 precursor (right of Figure 1d). [ 25 ] And in the 1 H nuclear magnetic resonance (NMR) spectrum, the characteristic hydroxyl peak of EG at 4.5 ppm disappeared in the PLE‐3‐6 copolymer (Figure S3, Supporting Information), indicating the effective esterification reaction between PLLA and EG.…”

Section: Resultsmentioning

confidence: 99%

Regulation of Interphase Layer by Flexible Quasi‐Solid Block Polymer Electrolyte to Achieve Highly Stable Lithium Metal Batteries

Chai

Chang

Zhong

et al. 2023

Adv Funct Materials

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Low safety, unstable interfaces, and high reactivity of liquid electrolytes greatly hinder the development of lithium metal batteries (LMBs). Quasi‐solid‐state electrolytes (QGPEs) with superior mechanical properties and high compatibility can meet the demands of LMBs. Herein, a biodegradable polyacrylonitrile/polylactic acid‐block‐ethylene glycol polymer (PALE) as membrane skeleton for GPEs is designed and systematically investigated by regulating the length and structure of the cross‐linked chain. Benefiting from the enriched affinitive sites of polar functional groups (CO, COC, CN, and OH) in highly cross‐linked polymer structure, the designed PALE membrane skeleton exhibits flame‐retardant property and ultrahigh liquid electrolyte uptake property, and the derived quasi‐solid‐state PALE GPEs deliver enhanced stretchability and a higher electrochemical stable window of 5.11 V. Besides, the PALE GPEs effectively protect cathodes from corrosion while allowing uniform and fast transfer of Li+ ions. Therefore, the Li||Li symmetrical battery and LFP or NCM811||Li full‐cell using PALE GPEs exhibit excellent cycling stability coupled with compact and flat inorganic/organic interface layers. And the excellent cycling stability of pouch cells under harsh operating conditions indicates the application possibilities of PALE GPEs in flexible devices with high‐energy‐density.

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Section: Resultsmentioning

confidence: 99%

Regulation of Interphase Layer by Flexible Quasi‐Solid Block Polymer Electrolyte to Achieve Highly Stable Lithium Metal Batteries

Chai

Chang

Zhong

et al. 2023

Adv Funct Materials

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“…Nonetheless, the interactions between glycerol and BW, and not only between glycerol and the polysaccharide, are generally left unaddressed. However, glycerol is a well-known plasticizer for polyesters [ 35 ]; therefore, interactions between glycerol and the long-chain esters of BW, which would work as hydrogen bond acceptors, are plausible. This is further discussed when assessing optical microscopy images.…”

Section: Resultsmentioning

confidence: 99%

Stabilization of Beeswax-In-Water Dispersions Using Anionic Cellulose Nanofibers and Their Application in Paper Coating

Bayés,

Aguado,

Tarrés

et al. 2023

Nanomaterials

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Beeswax is a bio-sourced, renewable, and even edible material that stands as a convincing option to provide paper-based food packaging with moisture resistance. Nonetheless, the difficulty of dispersing it in water limits its applicability. This work uses oxidized, negatively charged cellulose nanofibers along with glycerol to stabilize beeswax-in-water emulsions above the melting point of the wax. The synergistic effects of nanocellulose and glycerol granted the stability of the dispersion even when it cooled down, but only if the concentration of nanofibers was high enough. This required concentration (0.6–0.9 wt%) depended on the degree of oxidation of the cellulose nanofibers. Rheological hindrance was essential to prevent the buoyancy of beeswax particles, while the presence of glycerol prevented excessive aggregation. The mixtures had yield stress and showed pseudoplastic behavior at a high enough shear rate, with their apparent viscosity being positively influenced by the surface charge density of the nanofibers. When applied to packaging paper, the nanocellulose-stabilized beeswax suspensions not only enhanced its barrier properties towards liquid water (reaching a contact angle of 96°) and water vapor (<100 g m−2 d−1), but also to grease (Kit rating: 5) and airflow (>1400 Gurley s). While falling short of polyethylene-coated paper, this overall improvement, attained using only one layer of a biobased coating suspension, should be understood as a step towards replacing synthetic waxes and plastic laminates.

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Synthesis of new sustainable polyester‐type hydrogels from chemical recycled poly(ethylene terephthalate) products applied on the removal of indigo carmine dye

Schneider,

Simioni,

Petzhold

et al. 2024

J of Applied Polymer Sci

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Large amounts of plastic waste are daily generated, becoming a global issue that needs to be addressed. Thus, new recycling alternatives have been explored, such as the depolymerization of poly(ethylene terephthalate) waste (wPET). These reactions can lead to the formation of oligomers and monomers, which can then be employed in new synthetic processes. The aim of this work is to use the products of the chemical recycling of wPET on the synthesis of hydrogels and evaluate the capacity of these materials to adsorb dyes aiming a wastewater treatment. The depolymerizations were done through glycerolysis reactions catalyzed by zinc (II) acetate under microwave radiation. Afterwards, the obtained oil was crosslinked with citric acid (CA) under tin (II) chloride catalysis to obtain the hydrogels. The water uptake capacity of the hydrogels ranged from 310% to 1442%, depending on the CA content. When placed in an indigo carmine solution, the hydrogels showed high adsorption capacity, removing up to 97% of the dye. The kinetic study revealed a physicochemical mechanism for the removal process, corroborated by Temkin isotherms. These results indicate that the chemical recycling of PET via glycerolysis is a viable alternative for producing hydrogels, reducing plastic waste while creating new tools for wastewater treatment.

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Synthesis and characterization of a polyester based on citric acid/ethylene glycol/glycerol

Cited by 4 publications

References 19 publications

Regulation of Interphase Layer by Flexible Quasi‐Solid Block Polymer Electrolyte to Achieve Highly Stable Lithium Metal Batteries

Regulation of Interphase Layer by Flexible Quasi‐Solid Block Polymer Electrolyte to Achieve Highly Stable Lithium Metal Batteries

Stabilization of Beeswax-In-Water Dispersions Using Anionic Cellulose Nanofibers and Their Application in Paper Coating

Synthesis of new sustainable polyester‐type hydrogels from chemical recycled poly(ethylene terephthalate) products applied on the removal of indigo carmine dye

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