Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Polymer Classification: Architecture01:14

Polymer Classification: Architecture

2.9K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.9K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

1.8K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
1.8K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.1K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.1K
Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

1.7K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
1.7K
Bioplastics01:27

Bioplastics

73
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
73
Microbial Bioremediation of Plastics01:28

Microbial Bioremediation of Plastics

142
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
142

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Non-isocyanate polyurethane foams: where we stand and what comes next?

Chemical Society reviews·2026
Same author

Abietic Acid Derivatives Combining Epoxy and Anhydride Functionalities: Self- and Co-Polymerization toward Fully Bio-Based Thermosets.

Biomacromolecules·2026
Same author

Cellulose Nanocrystals-Stabilized Bio-Based Waterborne Polyhydroxyurethane Nanocomposites with Enhanced Adhesive Performance.

ACS applied polymer materials·2026
Same author

Synergistic Processes for Microstructure Engineering and Enhanced Dielectric Functionality in PVDF-Based Systems.

Macromolecular rapid communications·2025
Same author

Efficient room-temperature synthesis of crosslinked polyhydroxyurethanes from 5-membered cyclic carbonates without solvent or catalyst.

Faraday discussions·2025
Same author

Structural Properties of Globulin: A Critical Parameter for Sunflower Meal as Wood Panel Adhesives.

ACS omega·2024

Video Experimental Relacionado

Updated: May 5, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

21.8K

Poli (hidroxiuretano) de base biológica para el almacenamiento eficiente de energía orgánica de alta potencia

Florian Le Goupil1, Victor Salvado1, Valère Rothan1

  • 1Laboratoire de Chimie des Polymères Organiques (LCPO UMR 5629), Université de Bordeaux, CNRS, 16 Avenue Pey-Berland, Bordeaux INP, 33607 Pessac Cedex, France.

Journal of the American Chemical Society
|February 17, 2023
PubMed
Resumen

Los poli (hidroxiuretano) de base totalmente biológica ofrecen una solución sostenible para el almacenamiento de energía. Estos materiales proporcionan una alta densidad energética y eficiencia, comparables a las alternativas petroquímicas, allanando el camino para tecnologías más ecológicas.

Más Videos Relacionados

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
08:29

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Published on: January 10, 2017

9.2K
Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
11:49

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

Published on: March 8, 2019

12.7K

Videos de Experimentos Relacionados

Last Updated: May 5, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

21.8K
Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
08:29

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Published on: January 10, 2017

9.2K
Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
11:49

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

Published on: March 8, 2019

12.7K

Área de la Ciencia:

  • Ciencias de los materiales
  • Almacenamiento de energía
  • Química de los polímeros

Sus antecedentes:

  • Las fuentes de energía sostenibles requieren un almacenamiento eficiente de energía para gestionar la intermitencia.
  • Los polímeros orgánicos se exploran como dieléctricos escalables y verdes para condensadores de alta potencia.
  • Los materiales existentes a menudo dependen de fuentes petroquímicas, lo que pone de relieve la necesidad de alternativas de base biológica.

Objetivo del estudio:

  • Síntesis y caracterización de polihidroxiuretano (PHU) de base totalmente biológica para aplicaciones de almacenamiento de energía de alto rendimiento.
  • Evaluar las propiedades dieléctricas, incluida la permitividad y la resistencia a la descomposición, de los PHU sintetizados.
  • Evaluar el rendimiento y la eficiencia del almacenamiento de energía de las PHU de base biológica como dieléctricos condensadores.

Principales métodos:

  • Síntesis de PHU de origen biológico mediante la reacción del dicarbonato de eritritol con las diaminas de origen biológico.
  • Caracterización de las propiedades del PHU: temperatura de transición vítrea (Tg), permisividad (εr), resistencia a la ruptura (EB) y pérdida dielétrica (tan δ).
  • Evaluación del rendimiento del almacenamiento de energía, incluida la densidad de descarga de energía (Ue) y la eficiencia de descarga (η).

Principales resultados:

  • PHU sintéticos de base totalmente biológica con una temperatura de transición de vidrio (Tg) de alrededor de 50 °C.
  • Se obtiene una elevada permitividad (εr > 8) y resistencia a la rotura (EB > 400 MV·m−1).
  • Se han demostrado bajas pérdidas dieléctricas (tan δ < 0,03) y una alta densidad de energía de descarga (Ue > 6 J·cm−3).
  • Ejerce una excelente eficiencia de descarga (η = 85% en EB, hasta el 91% en 0.5 EB).

Conclusiones:

  • Los PHU de base biológica exhiben propiedades dieléctricas prometedoras para aplicaciones de condensadores de alta potencia.
  • Los PHU sintetizados ofrecen un rendimiento de almacenamiento de energía comparable al de los materiales petroquímicos.
  • Estos materiales de base biológica representan una vía sostenible y eficiente para las soluciones de almacenamiento de energía verde.