Bio-elastomer nanocomposites reinforced with surface-modified graphene oxide prepared <i>via in situ</i> coordination polymerization

Bahena, Arely; Magaña, Ilse; González, Héctor Ricardo López; Handa, Rishab; Enríquez-Medrano, Francisco Javier; Kumar, Sugam; Carrizales, Ricardo Mendoza; Fernández, Salvador; Valencia, Luis; León, Ramón Díaz de

doi:10.1039/d0ra07008d

Cited by 11 publications

(17 citation statements)

References 52 publications

(50 reference statements)

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“…However, the employed catalytic system is sensitive to deactivation because of impurities such as water. NdV 3 is one of the most reported rare earth metal-based catalysts and several studies have already been published about its application to polymerize terpenes with good control of macro- and microstructures [ 5 , 6 , 34 , 35 , 36 ], including the in-situ preparation of nanocomposites including graphene oxide [ 37 ]. The mechanism of a conventional coordination reaction comprises the steps of catalyst activation, initiation, propagation, and chain transfer [ 38 , 39 ].…”

Section: Resultsmentioning

confidence: 99%

Fully Bio-Based Elastomer Nanocomposites Comprising Polyfarnesene Reinforced with Plasma-Modified Cellulose Nanocrystals

Magaña¹,

Georgouvelas

Handa

et al. 2021

Polymers

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This article proposes a process to prepare fully bio-based elastomer nanocomposites based on polyfarnesene and cellulose nanocrystals (CNC). To improve the compatibility of cellulose with the hydrophobic matrix of polyfarnesene, the surface of CNC was modified via plasma-induced polymerization, at different powers of the plasma generator, using a trans-β-farnesene monomer in the plasma reactor. The characteristic features of plasma surface-modified CNC have been corroborated by spectroscopic (XPS) and microscopic (AFM) analyses. Moreover, the cellulose nanocrystals modified at 150 W have been selected to reinforce polyfarnesene-based nanocomposites, synthesized via an in-situ coordination polymerization using a neodymium-based catalytic system. The effect of the different loading content of nanocrystals on the polymerization behavior, as well as on the rheological aspects, was evaluated. The increase in the storage modulus with the incorporation of superficially modified nanocrystals was demonstrated by rheological measurements and these materials exhibited better properties than those containing pristine cellulose nanocrystals. Moreover, we elucidate that the viscoelastic moduli of the elastomer nanocomposites are aligned with power–law model systems with characteristic relaxation time scales similar to commercial nanocomposites, also implying tunable mechanical properties. In this foreground, our findings have important implications in the development of fully bio-based nanocomposites in close competition with the commercial stock, thereby producing alternatives in favor of sustainable materials.

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Section: Resultsmentioning

confidence: 99%

Fully Bio-Based Elastomer Nanocomposites Comprising Polyfarnesene Reinforced with Plasma-Modified Cellulose Nanocrystals

Magaña¹,

Georgouvelas

Handa

et al. 2021

Polymers

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“…The same catalytic system has also been used by Gomez to produce bio-elastomer nanocomposites via in situ coordination polymerization, starting from modified-surface graphene oxide (m-GO) with alkylamines of different alkyl lengths (octyl-, dodecyl-, and hexadecylamine). [53] Grafted amines (around 30 wt %) were confirmed by FTIR, Raman spectroscopy, and X-ray diffraction. All reactions were performed in cyclohexane at 60 °C, using a monomer/Nd ratio of 300-1000 in 1-1.5 h. The presence of the m-GO (0.1-1 wt %) does not affect the catalytic activity (112-215 kg mol Nd À 1 h À 1 ) and the microstructure control of the catalyst (cis-1,4 > 95 %).…”

Section: Group 3 and Rare-earth Metalsmentioning

confidence: 95%

Stereoregular Polymerization of Acyclic Terpenes

2021

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The growing environmental pollution and the expected depleting of fossil resources have sparked interest in recent years for polymers obtained from monomers originating from renewable sources. Furthermore, nature can provide a variety of building blocks with special structural features (e. g. side groups or stereo-elements) that cannot be obtained so easily via fossilbased pathways. In this context, terpenes are widespread natural compounds coming from non-food crops, present in a large variety of structures, and ready to use as monomers with or without further modifications. The present review aims to provide an overview of how chemists can stereospecifically polymerize terpenes, particularly the acyclic ones like myrcene, ocimene, and farnesene, using different metal catalyst systems in coordination-insertion polymerization. Attention is also paid to their copolymers, which have recently been disclosed, and to the possible applications of these bio-based materials in various industrial sectors such as in the field of elastomers.

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“…Second, multimodal sensing strategy of BISS requires that the materials should be modified in various ways to capture multiple functions and achieve high sensitivity for accurate physiological and somatosensory monitoring. Currently, many intrinsically biocompatible soft materials, including natural materials, [35][36][37][38] conductive polymers, [32,39,40] ionic hydrogels, [41][42][43][44][45] and nanocomposites-based elastomers, [46][47][48][49] can directly act as stretchable sensing parts to record or respond to external stimuli, acting as the fundamental building elements of sensors. Following, we choose several example materials to demonstrate their main features that suit biointegrated applications.…”

Section: Materials Requirements For Bissmentioning

confidence: 99%

Recent Progress in Bio‐Integrated Intelligent Sensing System

Liu

Zhang

Tao

2022

Advanced Intelligent Systems

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It is incontrovertible that the bioelectronic enabled bio‐integrated system is one of the most promising technologies in the upcoming decades. Driven by the great versatility of the emerging artificial intelligence, machine‐learning‐supported bio‐integrated intelligent sensing system (BISS) is capable of achieving data processing and intelligent recognition while conducting multimodal human‐centered sensing; such facilitated systems capitalize the benefits of both bioelectronics and supporting algorithm, enabling accurate physiological/somatosensory recognition at the cost of certain computing resources. Herein, an overview of recent progress in BISS is presented, with an emphasis on high‐tech applications enabled by innovations in combining flexible bioelectronic sensors with supporting algorithmic systems. The main applications can be divided into three categories, including implantable, skin‐mounted, and wearable BISS, which have different requirements for materials, fabrication methods, and algorithms, respectively. Advances in these areas open new avenues for employing BISS as future human–machine interfaces for personalized healthcare, human enhancement, as well as other broad applications.

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Bio-elastomer nanocomposites reinforced with surface-modified graphene oxide prepared via in situ coordination polymerization

Abstract: This article proposes a method to produce bio-elastomer nanocomposites, based on polyfarnesene or polymyrcene, reinforced with surface-modified graphene oxide (GO).

Cited by 11 publications

References 52 publications

Fully Bio-Based Elastomer Nanocomposites Comprising Polyfarnesene Reinforced with Plasma-Modified Cellulose Nanocrystals

Fully Bio-Based Elastomer Nanocomposites Comprising Polyfarnesene Reinforced with Plasma-Modified Cellulose Nanocrystals

Stereoregular Polymerization of Acyclic Terpenes

Recent Progress in Bio‐Integrated Intelligent Sensing System

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