Preparation and characterization of polyimide–nanogold nanocomposites from 3-mercaptopropyltrimethoxysilane encapsulated gold nanoparticles

Chang, Chih-Ming; Chang, Cheng-Chi

doi:10.1016/j.polymdegradstab.2007.10.018

Cited by 16 publications

(4 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High thermal stability combined with excellent mechanical and electrical properties of PIs also make them attractive be used as versatile high-temperatureresistant films, matrices of composites, coatings, and adhesives in microelectronics and photoelectric industry [1][2][3][4][5][6][7]. However, some applications are often limited by their poor solubility and high processing temperature partly due to rigid polymer backbones and the strong interchain interaction.…”

Section: Introductionmentioning

confidence: 99%

Novel fluorinated polyimides derived from 9,9-bis(4-amino-3,5-difluorophenyl)fluorene and aromatic dianhydrides

Wang¹,

Zhao²,

Li³

et al. 2009

Polymer Degradation and Stability

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Novel fluorinated polyimides derived from 9,9-bis(4-amino-3,5-difluorophenyl)fluorene and aromatic dianhydrides

Wang¹,

Zhao²,

Li³

et al. 2009

Polymer Degradation and Stability

View full text Add to dashboard Cite

“…The prepared mixture was added to the boiling mixture of 40 mmol thiosemicarbazide in 20 ml ethanol. After adding 5 ml water, the final mixture was refluxed for 6 h. Finally, the precipitate was filtered and washed with mixture of 50/50 water-ethanol and dried [8].…”

Section: Synthesis Of Benzyl Bis (Thiosemicarbazone) Ligandmentioning

confidence: 99%

Synthesis and Dielectric Properties of Poly Benzyl Bis (Thiosemicarbazone)/Nano Cerium Oxide Nanocomposites

Arianfar¹

2016

Chem Sci J

View full text Add to dashboard Cite

“…This is owing to numerous unique characteristics; for example, thermal conductivity and optical and magnetic properties. In addition, several other characteristic properties, such as high surface, quantum tunneling effect, quantum size impact, interface effects, and catalysis, are considered [1]. On the other hand, an organic material involved in the study of nanoscience occupies an indispensable position since it offers cost-effective processing and trouble-free incorporation into inorganic materials.…”

Section: Introductionmentioning

confidence: 99%

“…PVA has a carbon chain backbone structure with hydroxyl (OH) groups attached to methane carbons [15,16]. These OH groups provide hydrogen bonding, which facilitates the development of polymer composites [1]. From a practical standpoint, nano-filled polymers as hybrid materials gather all the desired properties of the polymer and the filler to produce substrates for microwaves [17], an electrolyte for fuel cells [18], an adsorptive photocatalyst [19], a supercapacitor [20], and humidity sensors [21].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Structural and Optical Characteristics of Biopolymer Composites Based on Polyvinyl Alcohol Inserted with PbS Nanoparticles

Darwesh

Mohammed²,

Mamand

et al. 2023

Coatings

View full text Add to dashboard Cite

The film casting method is implemented to synthesize a series of films consisting of polyvinyl alcohol (PVA) films and 4 wt%, 8 wt%, and 12 wt% lead sulfide (PbS) nanoparticles (NPs). X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and Ultraviolet-visible (UV-vis) spectroscopy were used to ensure the impact of PbS loading on PVA properties, particularly optical ones. The FTIR results show a decrease in the intensity for all the bands and the XRD results show different features for the composites from that of the pure PVA. The optical properties, including optical transmission, surface reflection, and absorption, were investigated. Additionally, the significant optical parameters, for instance, the dielectric nature and refractive index of the films, were analyzed. The findings have shown that PbS NPs in the PVA films decrease UV and visible transmission through polymer composites and increase their ability to reflect the incident light. Tauc’s equation is applied to determine the optical bandgap energy (Eg) and verify whether it is direct or indirect. Using the relation between photon energy and optical dielectric loss, the Eg was measured and the type of electron transition was measured, which eases the exponent value (𝜸) specification from Tauc’s method. The Eg decreases from 6.3 eV to 5.25 eV when PbS NPs are added. The refractive index is improved from 1.27 to 2.16 for the polymer nanocomposite (NCPs) film with optimum PbS NPs. Then, the Wemple–DiDomenico model corresponding to a single oscillator is applied to the dispersive medium to determine the refractive index dispersion. Both the dispersive energy (Ed) and single-oscillator energy (Eo) are evaluated accurately. Moreover, the variation of both real and imaginary parts of the dielectric constant of polymer films were studied. Finally the optical parameters such as charge density, dielectric constant at high frequencies, optical mobility (µ), angular frequency (ωp), optical resistivity (ρ), and relaxation time (τ) of electrons are shown quantitatively. The ωp of the electron is increased from 1.06 × 1029 to 81.5 × 1029 Hz when the PbS NPs is added. The µ of the electrons is also increased from 4.85 to 6.22 cm2/(V·s) by adding the PbS NP.

show abstract

Preparation and characterization of polyimide–nanogold nanocomposites from 3-mercaptopropyltrimethoxysilane encapsulated gold nanoparticles

Cited by 16 publications

References 35 publications

Novel fluorinated polyimides derived from 9,9-bis(4-amino-3,5-difluorophenyl)fluorene and aromatic dianhydrides

Novel fluorinated polyimides derived from 9,9-bis(4-amino-3,5-difluorophenyl)fluorene and aromatic dianhydrides

Synthesis and Dielectric Properties of Poly Benzyl Bis (Thiosemicarbazone)/Nano Cerium Oxide Nanocomposites

Investigation of Structural and Optical Characteristics of Biopolymer Composites Based on Polyvinyl Alcohol Inserted with PbS Nanoparticles

Contact Info

Product

Resources

About