Multi-walled carbon nanotube and carbon nanofiber/ polyacrylonitrile aerogel scaffolds for enhanced epoxy resins

Dourani, Akram; Haghgoo, Majid; Hamadanian, Masood

doi:10.1016/j.compositesb.2019.107299

Cited by 33 publications

(8 citation statements)

References 33 publications

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“…This method has widely been used in non-biomedical fields to prepare synthetic membranes for separation and filtration purposes so far. As recent examples of applications of TIPS for nonmedical applications, the production of nanocomposite-based epoxy resins with favourable electrical, thermal and mechanical properties from polyacrylonitrile aerogel and carbon nanofibres (CNFs) can be mentioned [ 112 ]. Epoxy resins, as thermosetting polymers with unique physical, mechanical and chemical resistance, can be used in protective coatings, adhesives, high-performance composites, moulding and electrical applications [ 113 , 114 ].…”

Section: Tips Techniquementioning

confidence: 99%

Recent Progress on Biodegradable Tissue Engineering Scaffolds Prepared by Thermally-Induced Phase Separation (TIPS)

Zeinali

Valle

Torras

et al. 2021

IJMS

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Porous biodegradable scaffolds provide a physical substrate for cells allowing them to attach, proliferate and guide the formation of new tissues. A variety of techniques have been developed to fabricate tissue engineering (TE) scaffolds, among them the most relevant is the thermally-induced phase separation (TIPS). This technique has been widely used in recent years to fabricate three-dimensional (3D) TE scaffolds. Low production cost, simple experimental procedure and easy processability together with the capability to produce highly porous scaffolds with controllable architecture justify the popularity of TIPS. This paper provides a general overview of the TIPS methodology applied for the preparation of 3D porous TE scaffolds. The recent advances in the fabrication of porous scaffolds through this technique, in terms of technology and material selection, have been reviewed. In addition, how properties can be effectively modified to serve as ideal substrates for specific target cells has been specifically addressed. Additionally, examples are offered with respect to changes of TIPS procedure parameters, the combination of TIPS with other techniques and innovations in polymer or filler selection.

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Section: Tips Techniquementioning

confidence: 99%

Recent Progress on Biodegradable Tissue Engineering Scaffolds Prepared by Thermally-Induced Phase Separation (TIPS)

Zeinali

Valle

Torras

et al. 2021

IJMS

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“…Solar steam generation is also a field where aerogels play important role [93,94]. Through some special processes such as in-situ polymerization [95], surface-oxidation [96], coating [97], additive incorporation [98,99], the aerogels can be made with ultrahigh specific area for large capacitance and tunable properties [97], good electrochemical performances [95], and robust for reinforcement in composites [99]. Mechanics-related applications are also reported.…”

Section: Applicationsmentioning

confidence: 99%

Advances in Manufacturing Composite Carbon Nanofiber-Based Aerogels

Gan

2020

J. Compos. Sci.

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This article provides an overview on manufacturing composite carbon nanofiber-based aerogels through freeze casting technology. As known, freeze casting is a relatively new manufacturing technique for generating highly porous structures. During the process, deep cooling is used first to rapidly solidify a well-dispersed slurry. Then, vacuum drying is conducted to sublimate the solvent. This allows the creation of highly porous materials. Although the freeze casting technique was initially developed for porous ceramics processing, it has found various applications, especially for making aerogels. Aerogels are highly porous materials with extremely high volume of free spaces, which contributes to the characteristics of high porosity, ultralight, large specific surface area, huge interface area, and in addition, super low thermal conductivity. Recently, carbon nanofiber aerogels have been studied to achieve exceptional properties of high stiffness, flame-retardant and thermal-insulating. The freeze casting technology has been reported for preparing carbon nanofiber composite aerogels for energy storage, energy conversion, water purification, catalysis, fire prevention etc. This review deals with freeze casting carbon nanofiber composite materials consisting of functional nanoparticles with exceptional properties. The content of this review article is organized as follows. The first part will introduce the general freeze casting manufacturing technology of aerogels with the emphasis on how to use the technology to make nanoparticle-containing composite carbon nanofiber aerogels. Then, modeling and characterization of the freeze cast particle-containing carbon nanofibers will be presented with an emphasis on modeling the thermal conductivity and electrical conductivity of the carbon nanofiber network aerogels. After that, the applications of the carbon nanofiber aerogels will be described. Examples of energy converters, supercapacitors, secondary battery electrodes, dye absorbents, sensors, and catalysts made from composite carbon nanofiber aerogels will be shown. Finally, the perspectives to future work will be presented.

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“…In terms of aerogels synthesized by nanofibers, including lignocellulose, polyacrylonitrile, and polyimide, the pore walls are assembled from 3D interconnected fibrils through hydrogen or covalent bonds. [15][16][17] The connectivity of nanofiber networks strongly determines the mechanical robustness of aerogel skeletons. [18] Previous research about hydrogels have confirmed that high cross-linking enabled by salting out or ion coordination interaction can give rise to fibrillar aggregation and elevate tensile strength by 3-5 times.…”

Section: Introductionmentioning

confidence: 99%

Acid‐Assisted Toughening Aramid Aerogel Monoliths with Ultralow Thermal Conductivity and Superior Tensile Toughness

Wu,

Zhang,

Sang

et al. 2023

Adv Funct Materials

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Resisting extreme loading and thermal ablation encountered by aerospace devices demands for high performance engineering materials. Aerogels have achieved satisfactory thermal insulation but the intrinsic brittleness of porous skeletons fail to ensure their normal operation under severe stress fields. Herein, aramid nanofibers (ANFs) are processed into tough 3D aerogel monoliths via a multi‐scale toughening strategy, involving unidirectional freeze‐casting‐enabled microstructure orientation and acid‐assisted nanofiber cross‐linking. Scalable production of ANFs aerogels is realized through fast air‐drying without excessive energy consumption. The aligned sheets in ANFs aerogels enable extreme thermal conductivity of 15.8 mW m−1 K−1, superinsulation from −130 to 300 °C, and durable combustion protection for 20 min. Particularly, highly aggregated nanofibers assemble into dense ANFs skeletons, endowing the tough aerogels with superior specific tensile strength (89 MPa cm3 g−1), ultra‐high toughness (1.3 MJ m−3), and impressive fracture energy (7.36 kJ m−2). Such mechanical properties are highly resistant to harsh environments, including water erosion (7 days) and high temperature baking (30 days). Moreover, ANFs aerogels exhibit two to three times more energy dissipation than commercial foams against ballistic impact at 140 m s−1. This integrated mechanical and thermal robustness may pioneer the potential application in impact‐thermal coupled safeguard for aerogel materials.

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Multi-walled carbon nanotube and carbon nanofiber/ polyacrylonitrile aerogel scaffolds for enhanced epoxy resins

Cited by 33 publications

References 33 publications

Recent Progress on Biodegradable Tissue Engineering Scaffolds Prepared by Thermally-Induced Phase Separation (TIPS)

Recent Progress on Biodegradable Tissue Engineering Scaffolds Prepared by Thermally-Induced Phase Separation (TIPS)

Advances in Manufacturing Composite Carbon Nanofiber-Based Aerogels

Acid‐Assisted Toughening Aramid Aerogel Monoliths with Ultralow Thermal Conductivity and Superior Tensile Toughness

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