Mechanical, surface, and thermal properties of polyamideimide–polydimethylsiloxane nanocomposites fabricated by sol–gel process

Park, Young-Wook; Lee, Dong-Sung; Kim, Sang-Hyun

doi:10.1002/app.13312

Cited by 13 publications

(12 citation statements)

References 33 publications

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“…Average porosity value was determined as 18% for the samples. This value is lower than reported for commercially used Celgard 2400 cell (41%) [45], but electrochemical results showed that even with this low porosity ionic conductivity values are more than sufficient. Lower porosity of 10PDMSFilm 2 may be caused by increase of the fiber diameter.…”

Section: Porosity and Electrolyte Uptake Of Membranescontrasting

confidence: 67%

“…This variety is the cause of synthesis and modification techniques. In our work, the glass transition temperature value of neat BTDA/ODA‐based fibrous PI was determined as 212°C and it is quite higher compared to Celgard cells which commercially used . The T g value of samples greatly increased after photocurable resin was applied to fibrous PI due to crosslinked structure formation.…”

Section: Resultsmentioning

confidence: 72%

“…2 and the total uptake rate was determined as 380% which is greatly higher compared to Celgard 2400 (%233). This difference can be attributed to the high porosity of the nanofibers [21,41,44,45]. In Table 4, it is seen that all the samples had showed good lithium solution uptakes, afterward of photocuring process.…”

Section: Porosity and Electrolyte Uptake Of Membranesmentioning

confidence: 96%

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Synthesis, characterization, and ionic conductivity of electrospun organic–inorganic hybrid gel electrolytes

Aytan

Uğur

Kayaman‐Apohan

2019

Polymer Engineering & Sci

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In this work, we described the synthesis of organic–inorganic hybrid gel electrolytes combining electrospinning, sol–gel, and ultraviolet (UV) curing techniques in order to investigate their ionic conductivity properties. First, 3‐glycidyloxypropyl trimethoxysilane modified polyamic acid and alkoxysilane functional poly(dimethyl siloxane) were electrospun together. Then, the following thermal imidization, the obtained fiber was cured in the UV curable gel formulation. To improve the interaction between fiber and gel matrix, 3‐(trimethoxysilyl)propyl methacrylate was partly hydrolyzed and then used as a bifunctional crosslinker. Finally, the membrane was soaked into 0.5 M LiFP6 salt solution to obtain organic–inorganic hybrid gel electrolytes. The chemical structure, ionic conductivity, and range of electrochemical stability window of the photocured nanocomposite electrolytes were investigated by using FTIR, thermogravimetric analysis, differential scanning calorimetry, electrochemical impedance spectroscopy, linear sweep voltammetry, and SEM analysis. The acquired results from experiments indicate that a convenient nanocomposite electrolyte for lithium‐ion batteries with high electrolyte (Li salt) uptake, adequate conductivity (1.02 × 10−3 S cm−1) at ambient temperature and electrochemically stable between 1 and 6 V had been prepared. POLYM. ENG. SCI., 60:619–629, 2020. © 2019 Society of Plastics Engineers

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Section: Porosity and Electrolyte Uptake Of Membranescontrasting

confidence: 67%

Section: Resultsmentioning

confidence: 72%

Section: Porosity and Electrolyte Uptake Of Membranesmentioning

confidence: 96%

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Synthesis, characterization, and ionic conductivity of electrospun organic–inorganic hybrid gel electrolytes

Aytan

Uğur

Kayaman‐Apohan

2019

Polymer Engineering & Sci

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“…The sample code is abbreviated based on the weight composition of the polysiloxane in the hybrids at the feed. were also confirmed [29,30].…”

Section: Preparation Of Polybenzoxazine-poly(dimethylsiloxane-co-diphsupporting

confidence: 64%

Preparation and Properties of Polybenzoxazinepoly(dimethylsiloxane-co-diphenylsiloxane) Hybrids as High Performance Polymers

Ardhyananta

Kawauchi

Takeichi

et al. 2010

High Performance Polymers

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Polybenzoxazine, poly(B-a), was hybridized with polysiloxanes by synchronizing two reactions1 ring-opening polymerization of benzoxazine (B-a) and the sol-gel process of diethoxysilanes. As diethoxysilanes, mixtures of diethoxydimethylsilane and diethoxydiphenylsilane in various ratios were used to prepare polysiloxane copolymers, poly(dimethylsiloxane-co-diphenylsiloxane), P(DMS/DPS). The effect of diphenylsiloxane (DPS) content of polysiloxane copolymer on the optical, mechanical, and thermal properties of the hybrids was studied. The progress of the sol-gel process was confirmed by IR, 1 H-NMR and size exclusion chromatography. Opaque poly(B-a)-P(DMS/DPS) hybrid films were obtained at high dimethylsiloxane (DMS) content corresponding to the phase separation. The domain size of the polysiloxane was evaluated from the scanning electron microscope. Meanwhile, transparent hybrid films were obtained at high DPS content, corresponding to the homogeneous phase as observed from the scanning electron microscope. The hybrid films revealed higher tensile strength and elongation at break than pristine poly(B-a) as a function of DPS content. Dynamic viscoelastic analyses of the hybrids at high DMS content revealed two glass transition temperatures (T g ) corresponding to polysiloxane and poly(B-a) components, while one T g was observed at high DPS content. Thermogravimetric analysis of the hybrids revealed that the thermal stability of the poly(B-a)-polysiloxane hybrids was higher than pristine poly(B-a) depending on the DPS content.

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“…A low glass‐transition temperature in melting gels indicates a higher concentration of linear polymeric chains. The T g of PDMS, which is formed only from the linear polysiloxane chains is ~−100°C …”

Section: Discussionmentioning

confidence: 99%

Hybrid Sol–Gel Glasses with Glass‐Transition Temperatures Below Room Temperature

2015

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Melting gels are hybrid gels that have the ability to soften and flow at around 100°C for some combinations of mono-and di-substituted alkoxysiloxanes, where substitutions are either all aromatic or all aliphatic. In this study, melting gels were prepared using phenyltriethoxysilane (PhTES) and dimethyldiethoxysilane (DMDES), meaning both an aromatic and aliphatic substitution. Differential scanning calorimetry was performed to identify glass-transition temperatures, and thermal gravimetric analysis coupled with differential thermal analysis (TGA-DTA) was performed to measure weight loss. The glass-transition temperatures (T g ) ranged from -61°C to +5.6°C, which are between the values in the methyl only system, where all T g values are less than 0°C, and those values in the phenyl only system, where T g values are greater than 0°C. The T g decreased with an increase in the DMDES fraction. Below 450°C, the gels lost little weight, but around 600°C there was a drop in weight. This temperature is lower than the temperature for gels prepared with only aromatic substitutions, but higher than that for gels prepared with only aliphatic substitutions. Final heat treatment was carried out at 150°C for the gel with 80%PhTES-20%DMDES (in mol%), and the consolidation temperature increased with increasing DMDES content to 205°C for the gel with 50%PhTES-50%DMDES. After this heat treatment, the melting gels no longer soften.

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Mechanical, surface, and thermal properties of polyamideimide–polydimethylsiloxane nanocomposites fabricated by sol–gel process

Cited by 13 publications

References 33 publications

Synthesis, characterization, and ionic conductivity of electrospun organic–inorganic hybrid gel electrolytes

Synthesis, characterization, and ionic conductivity of electrospun organic–inorganic hybrid gel electrolytes

Preparation and Properties of Polybenzoxazinepoly(dimethylsiloxane-co-diphenylsiloxane) Hybrids as High Performance Polymers

Hybrid Sol–Gel Glasses with Glass‐Transition Temperatures Below Room Temperature

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