Enhanced mechanical, thermal and adhesion properties of addition cured polydimethylsiloxane nanocomposite adhesives

Anoop, V.; Subramani, Sankaraiah; Chakraborty, Sohini; Mary, Nicolas

doi:10.1016/j.ijadhadh.2022.103177

Cited by 10 publications

(6 citation statements)

References 48 publications

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“…[ 30 ]. The addition of the catalytic adsorbent (TiO 2 /MCM) slightly increased the T g (≤2 ℃), as can be viewed in Figure 5 and Table 1 , indicating that the T g is not significantly affected by the filler as reported previously [ 43 , 44 ]. This phenomena is due to the fact that the glass transition is only affected by the fraction of the unmodified polymer outside the interfacial layer [ 45 ].…”

Section: Resultssupporting

confidence: 78%

“…Increasing the adsorbent concentration resulted in more contact sites and higher interfacial interactions between the polymer chains and the TiO 2 /MCM particles. Consequently, the stiffness and the strength of the composites were increased due to the improved stress transfer from the PDMS matrix to the adsorbent [ 43 ]. The decrease in tensile properties above a 10 wt% is due to the formation of bigger aggregates that reduce the dispersion of the filler in the PDMS matrix, leading to a reduction in stress transferring efficiency.…”

Section: Resultsmentioning

confidence: 99%

“…The thermal stability of the TiO 2 /MCM/PDMS composites at high temperatures was evaluated via the thermogravimetric analysis, which measured the sample’s weight loss as a function of the temperature. Several characteristic parameters were used to analyze the thermal stability and degradation process, such as: the temperature for a 5% weight loss (T 5 ), the temperature for a 10% weight loss (T 10 ), and the temperature at which the maximum rate of mass loss is observed (T max ), in addition to the char residues [ 43 , 49 ]. The TGA thermograms of the pristine PDMS and PDMS composites are shown in Figure 6 .…”

Section: Resultsmentioning

confidence: 99%

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Studying the Physical and Chemical Properties of Polydimethylsiloxane Matrix Reinforced by Nanostructured TiO2 Supported on Mesoporous Silica

Katz¹,

Lachman

Hafif

et al. 2022

Polymers

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In this study, a reactive adsorbent filler was integrated into a polymeric matrix as a novel reactive protective barrier without undermining its mechanical, thermal, and chemical properties. For this purpose, newly synthesized TiO2/MCM/polydimethylsiloxane (PDMS) composites were prepared, and their various properties were thoroughly studied. The filler, TiO2/MCM, is based on a (45 wt%) TiO2 nanoparticle catalyst inside the pores of ordered mesoporous silica, MCM-41, which combines a high adsorption capacity and catalytic capability. This study shows that the incorporation of TiO2/MCM significantly enhances the composite’s Young’s modulus in terms of tensile strength, as an optimal measurement of 1.6 MPa was obtained, compared with that of 0.8 MPa of pristine PDMS. The composites also showed a higher thermal stability, a reduction in the coefficient of thermal expansion (from 290 to 110 ppm/°C), a 25% reduction in the change in the normalized specific heat capacity, and an increase in the thermal degradation temperatures. The chemical stability in organic environments was improved, as toluene swelling decreased by 40% and the contact angle increased by ~15°. The enhanced properties of the novel synthesized TiO2/MCM/PDMS composite can be used in various applications where a high adsorption capacity and catalytic/photocatalytic activity are required, such as in protective equipment, microfluidic applications, and chemical sensor devices.

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Section: Resultssupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Studying the Physical and Chemical Properties of Polydimethylsiloxane Matrix Reinforced by Nanostructured TiO2 Supported on Mesoporous Silica

Katz¹,

Lachman

Hafif

et al. 2022

Polymers

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“…In contrast, the mechanical performance of CPE-BT is significantly increased to a tensile strength of 4.37 MPa and a strain at break of 98%. The mechanical enhancement of the CPE-BT is ascribed to the interfacial interaction between the BT nanorods and the polymer, 32 while the BT's intrinsic defects and high aspect ratio facilitate such interactions.…”

Section: Characterization Of Thementioning

confidence: 99%

Ferroelectric Nanorods as a Polymer Interface Additive for High-Performance Garnet-Based Solid-State Batteries

Wang

Lin

et al. 2023

ACS Appl. Mater. Interfaces

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Sandwiching polymer interlayers between the electrode and solid electrolyte is considered promising in solving the interfacial issues arising from solid–solid contact in garnet-based solid-state batteries, but drawbacks including low ionic conductivity, inferior Li+ transference number, and unsatisfying mechanical property of the polymer hindered the practical application of such strategy. To solve the mentioned shortcomings of the polymer interlayer simultaneously, we introduce the ferroelectric material, BaTi2O5 (BT) nanorods, into the polymer matrix in this work. By taking full advantage of the plasticization effect and intrinsic spontaneous polarization of the introduced ferroelectric, the polymer’s ionic conductivity and Li+ transference number have been significantly enhanced. The built-in electric field BT introduced also benefits the modulation of CEI components formed on the cathode particles, further enhancing the battery performance by decreasing cathode degradation. Besides, the BT nanorods’ particular high aspect ratio also helps increase the mechanical property of the obtained polymer film, making it more resistant to lithium dendrite growth across the interface. Benefitting from the merits mentioned above, the assembled lithium symmetric cells using garnet SE with the BT-modified polymer interlayer exhibit stable cycling performance (no short circuit after 1000 h under RT) with low polarization voltage. The full battery employing LiFePO4 as a cathode also presents superior capacity retentions (94.6% after 200 cycles at 0.1 C and 93.4% after 400 cycles at 0.2 C). This work highlights the importance of ferroelectric materials with specific morphology in enhancing the electrochemical performance of polymer-based electrolytes, promoting the practical application of solid-state batteries.

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“…9,11,13 The choice of the chemical exfoliation method was motivated by its ability to produce high-quality graphene at a low cost and with a high yield. 14 The study examined the changes in the Raman bands at different strain percentages, visualizing the results through contour maps. The obtained results were compared with those reported in previous studies and the implications arising in the study were reported.…”

Section: Introductionmentioning

confidence: 99%

Strain cartography of bilayer graphene‐PDMS nanocomposites using Raman spectroscopy

Sarma,

Srivastava

2024

Polymer Composites

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Effective transmission of stress between fillers and the host matrix is instrumental in enhancing the properties of nanocomposites and optimizing filler reinforcement. This study delves into understanding stress transfer in materials, exploring the impact of synthesis methods and matrix materials through a comprehensive examination of a bilayer graphene (BLG)‐polydimethylsiloxane (PDMS) nanocomposite. BLG was synthesized via chemical exfoliation and subjected to various strain conditions within a PDMS matrix. A precisely controlled strain, ranging from 0% to 0.19%, was applied using a meticulous 4‐point bending method, monitored with a standard strain gauge. The study unveiled significant shifts in the Raman spectra's 2D band, indicating a direct linear relationship with applied strain. Utilizing contour mapping techniques on well‐defined Raman spectra and stress‐induced band shifts, we mapped strain distribution within the BLG layer. The results revealed a gradual increase in strain from the lower to the upper end of the BLG structure, resembling strain behaviors observed in differently shaped fibers. These compelling findings advance our understanding of strain dynamics within BLG‐PDMS nanocomposites, highlighting the crucial role of strain mapping methodologies in scrutinizing the material's structural response to deformation.Highlights The study reports successful synthesis of high‐quality bilayer graphene (BLG) using a chemical exfoliation method, as evidenced by the sharp 2D and G Raman peaks. Significant shifts in 2D band exhibited linear correlation between applied strain; observed within precise strain levels of 0% to 0.19%. Contour maps revealed a gradual increase in strain from the lower to the upper end of the BLG structure, akin to strain behaviors observed in differently shaped fibers.

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Enhanced mechanical, thermal and adhesion properties of addition cured polydimethylsiloxane nanocomposite adhesives

Cited by 10 publications

References 48 publications

Studying the Physical and Chemical Properties of Polydimethylsiloxane Matrix Reinforced by Nanostructured TiO2 Supported on Mesoporous Silica

Studying the Physical and Chemical Properties of Polydimethylsiloxane Matrix Reinforced by Nanostructured TiO2 Supported on Mesoporous Silica

Ferroelectric Nanorods as a Polymer Interface Additive for High-Performance Garnet-Based Solid-State Batteries

Strain cartography of bilayer graphene‐PDMS nanocomposites using Raman spectroscopy

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