Enhanced n-Type Thermoelectric Properties and Structure Evolution of Carbonized Metal-Coordination Polydopamine.

Carbonized polydopamine (cPDA) exhibits a nitrogenous graphite-like structure with n-type semiconductor property. However, the low electrical conductivity and Seebeck coefficient of cPDA cannot meet the needs of flexible thermoelectric devices. In this study, a series of metal ions were coordinated with cPDA to enhance n-type thermoelectric properties.

Effects of carbon nanomaterials hybridization of Poly(3,4-ethylenedioxythiophene): poly (styrene sulfonate) on thermoelectric performance.

The influence of multiple dimensional carbon nanomaterials, such as graphene quantum dots (GQD), multi-walled carbon nanotubes (MWCNT), and graphene sheets (GNS) of the thermoelectric properties in poly(3,4-ethylenedioxythiophene): poly (styrene sulfonate) (PEDOT: PSS)-based hybrids have been investigated. PEDOT: PSS matrix was successfully used to prepare PEDOT: PSS/GQDs (PGQD), PEDOT: PSS/MWCNT (PCNT) and PEDOT: PSS/GNS (PGNS) composite films. According to structural characteristics, strong-interactions existed between carbon materials and PEDOT: PSS, and PEDOT: PSS layers with organized and arranged morphology were easier templated by GNS than GQD or MWCNT.

Novel Hybrid p- and n-Type Organic Thermoelectric Materials Based on Mussel-Inspired Polydopamine.

Mussel-inspired polydopamine (PDA) can serve as building blocks and interfaces in designing functional materials. Here, the use of PDA as an interlayer between polyaniline (PANi) and multidimensional carbon materials, such as graphene quantum dots (GQD), multiwalled carbon nanotubes (MWCNT), and graphene nanosheets (GNS), to improve the thermoelectric performance of p-type polymer-based materials has been reported. The introduction of PDA promotes the carrier mobility of GQD/PDA/PANi, CNT/PDA/PANi, and GNS/PDA/PANi ternary composites due to the superior adhesive property of PDA.

Data on flexibility and thermal stability of Polypyrrole-based ternary nanocomposite films.

Carbon materials, such as multi-walled carbon nanotube (MWCNT), single-walled carbon nanotubes (SWCNT), and graphene sheets (GNS), filling into polymer substrates can effectively improve performance of composite materials [1], [2]. The data presented here in this article illustrates the different impacts of GNS and MWCNT on the mechanical properties of polypyrrole (PPy)-based composites systems. PPy/GNS and PPy/MWCNT binary composites were added into poly(3,4-ethylenedioxythiophene): poly (styrene sulfonate) (PEDOT: PSS) matrix.

Supporting data for the photo-induced deformation behavior for AZO-containing polymers connected by hydrogen bonding.

Besides covalent bond [1], the non-covalent interactions are expected to drive the photo-induced behavior. The data presented here in this article shows the effect of the azobenzene ratio to photo-induced deformation behaviors of aggregates self-assembled from poly (styrene--4-vinylpyridine) (PS--P4VP) and azobenzene (AZO) 4-phenylazophenol, which are connected with hydrogen bonding interaction, confirmed by C-NMR spectra and FTIR spectra. The average major-to-minor axis ratio () ( represent long axis of ellipsoid and represent minor axis) could reveal the deformation degree of the aggregates [2].

Polypyrrole/Graphene/Polyaniline Ternary Nanocomposite with High Thermoelectric Power Factor.

Polypyrrole/Graphene/Polyaniline (PPy/GNs/PANi) ternary nanocomposite with high thermoelectric power factor has been successfully prepared through the combination of in situ polymerization and solution process. FTIR, Raman spectra, XRD, and SEM analyses show the strong π-π interactions existed among PPy, GNs, and PANi, leading to the formation of more ordered regions in the composite. Both the in situ polymerization and solution process can enhance the dispersion homogeneity of graphene in the polymer matrix, bringing about increased nanointerfaces in the PPy/GNs/PANi composite.

Effect of water in amorphous polyvinyl formal: insights from molecular dynamics simulation.

In this study, molecular dynamics simulations were performed to study the influence of water on polyvinyl formal. The effects of adding different concentrations of water (0, 0.23, 0.

Silver(I) oxide-mediated regioselective 2-monoacylation in 3-O-benzyl-alpha-L-rhamnopyranosides and application in synthesis of a protected tetrasaccharide fragment of potent cytotoxic saponins gleditsiosides C and D.

The axial 2-hydroxyl group of methyl and allyl 3-O-benzyl-alpha-L-rhamnopyranosides was selectively acylated in 56-78% yields by reaction with 1.1 equiv of acyl chloride in the presence of 1.5 equiv of silver(I) oxide.