Recent advances in tailoring and improving the properties of polyimide aerogels and their application

Ghaffari‐Mosanenzadeh, Shahriar; Tafreshi, Omid Aghababaei; Karamikamkar, Solmaz; Saadatnia, Zia; Rad, Elmira; Meysami, Mohammad; Naguib, Hani E.

doi:10.1016/j.cis.2022.102646

Cited by 57 publications

(48 citation statements)

References 112 publications

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“…Secondly, various types of crosslinking agents, such as 1,3,5 tri amino phenoxy benzene (TAB), 1,3,5-benzenetricarbonyl trichloride (BTC), polyhedral oligomeric silsesquioxane (POSS), and octa (aminophenyl) silsesquioxane (OAPS), can modify the crosslinking structure and performance of PI. (A) PI fiber [62] can be used to make fireproof textile and thermal insulation towel woven by 80% polyester and 20% PI fiber [63] ; (B) the photo of space-qualified PI [64] and PI pipe [65] .…”

Section: Flexible Heat Insulation and Flame Retardant Materialsmentioning

confidence: 99%

Applications of flexible polyimide: barrier material, sensor material, and functional material

2022

Soft Sci

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Polyimide (PI), as an advanced polymer material, possesses the intrinsic merits of excellent resistance to extreme temperatures, good dielectric properties, flame resistance, strong processibility, biocompatibility, and flexibility. The outstanding performances of flexible PI have led to a wide range of applications in aerospace, medical, intelligent electronic devices, energy storage devices, and more. Notably, due to the swift progress of various flexible and soft devices, flexible PI has become ubiquitous in the form of thin films, fibers, and foam and gradually plays an indispensable role in all sorts of those devices. This review mainly focuses on the current advances in the usage of flexible PI for barrier, sensor, and functional purposes. Firstly, the key features of various methods for synthesizing and processing PI, as well as the relationship with their respective applications, are summarized. Secondly, to give readers a comprehensive view of the various applications of flexible PI materials, the applications are broken down into three categories: flexible barrier applications, flexible sensing applications, and flexible function applications, and the current research of each application is introduced in detail. Finally, a summary of the challenges and possible solutions in some flexible applications is present.

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Section: Flexible Heat Insulation and Flame Retardant Materialsmentioning

confidence: 99%

Applications of flexible polyimide: barrier material, sensor material, and functional material

2022

Soft Sci

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Section: Introductionmentioning

confidence: 99%

“…On the other hand, organic aerogels such as polyimide (PI) aerogels with mechanically strong integrity and flexible network have drawn attention in recent years as an alternative for silica aerogels. [7][8][9] Compared with conventional organic aerogels, PI aerogels can be up to 500-fold stronger. [7] PI aerogels, as a representative class of organic aerogels, are typically synthesized via a sol-gel technique, which consists of three major steps.…”

Section: Introductionmentioning

confidence: 99%

Machine learning‐based model for predicting the material properties of nanostructured aerogels

Tafreshi

Saadatnia

Ghaffari‐Mosanenzadeh

et al. 2022

SPE Polymers

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Data-driven modeling in material science rose to prominence in the last decade, and various supervised and unsupervised machine learning techniques have been employed for material development and deriving insights for decision-making purposes. In this context, machine learning can have prominent importance in the field of nanostructured aerogels for accelerated materials design and material properties prediction. Current attempts rely only on experimental approach, which have inherent shortcomings, including inefficiency due to the prolonged synthesis process, and necessity of analyzing microstructure and properties. In order to address the challenges associated with the traditional experimental approach, in this study, an artificial neural network (ANN) is employed to predict the material properties of nanostructured aerogels. Polyimide (PI) organic aerogels are selected for this purpose.Through understanding the contributing material and processing factors in PI aerogel synthesis, a dataset is prepared. Data preprocessing is performed, and through hyperparameter tuning, ANN is constructed and trained for a given dataset. Various material properties are predicted, including compressive modulus, density, and porosity. Results show that ANN is trained with high accuracy, which demonstrates the versatility and accuracy of model in materials properties prediction. This study can therefore pave the way for establishing a platform for data-driven materials innovation.

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“…Polymeric aerogels combine the useful properties of aerogels, for example, high-surface area and low density, with the desirable properties of their polymeric constituents, for example, high strength, elasticity, shape memory, and chemical reactivity . With a broad range of possible properties, novel combinations can be selected for complex applications.…”

Section: Introductionmentioning

confidence: 99%

“…3 Polymeric aerogels combine the useful properties of aerogels, for example, high-surface area and low density, with the desirable properties of their polymeric constituents, for example, high strength, elasticity, shape memory, and chemical reactivity. 4 With a broad range of possible properties, novel combinations can be selected for complex applications. For example, polystyrene, 5 polyvinyl alcohol, 6 and polyacrylonitrile 7 aerogels can capture organic compounds such as dyes and oils for applications in oil spill remediation.…”

Section: ■ Introductionmentioning

confidence: 99%

Transparent Polyimide Aerogels: Controlled Porosity via Minimizing the Phase Separation

Mettry

Lighty

Hammons

et al. 2022

ACS Appl. Polym. Mater.

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The aerogels industry has been growing with a market capacity of 909 billion USD in 2019. Silica aerogels are the most extensively used due to their ease of synthesis. It can possess many useful properties such as high optical transparency, high-surface area, low thermal conductivity, and a wide accessible density range. However, silica aerogels are brittle and friable, making them unsuitable for many applications. Polymeric aerogels are typically much more robust but lack the uniform fine nanostructure which gives silica its exceptional properties. Herein, mechanically robust polyimide (PI) aerogels with uniform <20 nm porosity and exceptional transparency are demonstrated. Optimization was achieved by minimizing the phase separation during gelation, minimizing the light scattering, and yielding the exceptionally transparent aerogels. The aromatic PI backbone results in a high modulus while retaining a low thermal conductivities and high thermal stability. We demonstrate methods for inducing phase separation to increase the pore size and the effects on bulk properties. This study presents a better understanding of the route to producing transparent polymer aerogels.

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Recent advances in tailoring and improving the properties of polyimide aerogels and their application

Cited by 57 publications

References 112 publications

Applications of flexible polyimide: barrier material, sensor material, and functional material

Applications of flexible polyimide: barrier material, sensor material, and functional material

Machine learning‐based model for predicting the material properties of nanostructured aerogels

Transparent Polyimide Aerogels: Controlled Porosity via Minimizing the Phase Separation

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