Intermingled Network of Syndiotactic Polystyrene/Poly(3-hexylthiophene)

Samanta, Ketaki; Guenet, Jean‐Michel; Malik, Sudip

doi:10.1021/acs.macromol.9b01512

Cited by 3 publications

(7 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A few spectral regions are of interest. In the P3HT spectrum, the peak at 1450 cm –1 is associated with the stretching vibration of the thiophene ring, and the peak at 1515 cm –1 is associated with the carbon–carbon double bond stretching vibration . The characteristic strong stretching vibrations of aliphatic (CH 2 ) bonds were also detected at 2906 cm –1 and 2851 cm –1 .…”

Section: Results and Discussionmentioning

confidence: 95%

“…The formation of organogels at a high P3HT concentration (∼10 mg mL –1 ) in various organic solvents has been reported. ,, The variation of the nanofibrillar network structure caused by the change in solvent quality has been shown to affect the conductivity values. Dried samples obtained from various organogels display conductivities as high as ∼10 –4 Scm –1 . ,,, In addition to the organogels with only P3HT, polymer gels consisting of polystyrene and P3HT have also been investigated. , In another study, the cogelation of poly(γ-benzyl- l -glutamate) (PBLG) and P3HT has been reported, where it has been shown that both polymers interact to form interconnected networks . The in situ polymerization of conductive polymers in molecular gels has also been reported.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanoscale Self-Assembly of Poly(3-hexylthiophene) Assisted by a Low-Molecular-Weight Gelator toward Large-Scale Fabrication of Electrically Conductive Networks

Lakdusinghe

Abbaszadeh

Mishra

et al. 2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Achieving self-assembly of conjugated polymers is necessary to harness their charge transport properties in various applications, including field-effect transistors, sensors, and conductive gels for biomedical applications. Although many processes have been investigated, there are still opportunities for developing new strategies that can lead to materials with improved performances. Particularly, large-scale fabrication of three-dimensional conductive networks formed by the self-assembly of conjugated polymers and low-molecular-weight gelators (LMWGs), but with conjugated polymers at much lower quantity, would be advantageous. LMWGs can be selected from an extensive library of available systems and can be directed to self-assemble in various conditions. However, the simultaneous self-assembly of LWMGs and conjugated polymers is not fully understood. Here, we report a simple pathway for the self-assembly of poly(3-hexylthiophene) (P3HT), a conjugated polymer, in chloroform in the presence of di-Fmoc-l-lysine, an LMWG. Di-Fmoc-l-lysine was selected as the LMWG because it does not have significant interactions with P3HT. P3HT and di-Fmoc-l-lysine in chloroform form gels with decreasing temperature. UV–vis spectroscopy provides an insight into the photophysical response of the gelation process, revealing the self-assembly of P3HT in the gel network. The scattering experiments further capture the self-assembly of the P3HT network. The nanofibrillar microstructure has been captured using atomic force microscopy (AFM) for the gels without and with P3HT, where both P3HT and di-Fmoc-l-lysine form nanofibers independently. Both these nanofibers coexist and intermingle, displaying conductive domains in the dried films captured by conductive AFM. The conductive nanofibers form a percolated network in the dried samples, leading to bulk electrical conductivity similar to that of pristine P3HT films. This is achieved with only 20% P3HT content and the balance insulating di-Fmoc-l-lysine molecules. Our results provide a fundamental understanding of the self-assembly of P3HT in the presence of an LMWG, resulting in a conductive nanofibrillar network. Such knowledge can readily be implemented in other conjugated polymeric systems. The approach presented here has potential applications towards fabricating conductive gels for biomedical and sensor applications and large-scale processing of thin films for optoelectronic applications.

show abstract

Section: Results and Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Nanoscale Self-Assembly of Poly(3-hexylthiophene) Assisted by a Low-Molecular-Weight Gelator toward Large-Scale Fabrication of Electrically Conductive Networks

Lakdusinghe

Abbaszadeh

Mishra

et al. 2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…The swelling of fibrils may be the wrapping of P3OT or insertion of P3OT chains onto/into 𝛿-form of sPS and indirectly supporting interactions of P3OT chains with the benzene group of the sPS chain (Figure 3). [15,22] Rheological tests to determine the storage modulus (G') and loss modulus (G'') have been performed to explore the viscoelastic properties of the pure sPS, and sPS-P3OT gel networks. In the frequency sweep, both moduli remain invariant over the frequency zone studied here and storage modulus is always greater than loss modulus, revealing viscoelastic nature of these networks.…”

Section: Resultsmentioning

confidence: 99%

“…As compared to sPS network, values of moduli in sPS-P3OT network have been significantly enhanced, indicating the intensive interaction between sPS and P3OT chains in the anisole medium (Table 2). [15,23]]…”

Section: Resultsmentioning

confidence: 99%

“…[14] Recently, it has been observed that P3HT aggregates are formed within sPS matrix and small amount of P3HT chains have been entrapped within the sPS helix. [15,16] Herein, we are trying to make the composite network having sPS and P3OT as active components to check the effect of side chain length on the formation of sPS-P3OT composite with the help of DSC, XRD, FT-IR, and absorption studies.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Syndiotactic Polystyrene/Poly(3‐Octyl Thiophene) Nanocomposite

Dhakar,

Malik

2024

Macromolecular Symposia

Self Cite

View full text Add to dashboard Cite

Among five crystal modifications (α, β, γ, δ, and ε), the δ‐form of syndiotactic polystyrene (sPS) has attracted many researches because the δ‐form of sPS has the ability to adsorb guest molecules producing clathrate or intercalate co‐crystals of sPS. Herein, sPS‐poly(3‐octyl thiophene) (P3OT) composite has been developed with the expectation of formation of P3OT aggregates onto or into the ordered structures of sPS. Nanocomposites have been characterized by DSC, FT‐IR, XRD, and absorption studies. Thermal studies show a reduction of gel melting temperature in presence of P3OT. The interaction between sPS and P3OT has been investigated by FTIR and XRD studies. Absorption spectra reveal the aggregation of P3OT chains within the sPS matrix. AFM topology is revealing the formation of fibrillar morphology of composite ruling out the possibility macroscopic phase separation within nanocomposite and rheological studies show the enhancement of the strength of sPS–P3OT composite network as compared to sPS network.

show abstract