3 research outputs found
Carrier-Free and Low-Temperature Ultradeep Dyeing of Poly(ethylene terephthalate) Copolyester Modified with Sodium-5-sulfo-bis(hydroxyethyl)-isophthalate and 2‑Methyl-1,3-propanediol
To
obtain sufficient dyeability, dyeing of poly(ethylene terephthalate)
fabrics must be performed at high temperature and high pressure or
by using a no-eco-friendly carrier at atmospheric pressure, which
implies large energy consumption and environmental contamination.
In order to improve the sustainability of the dyeing process, a carrier-free
and low-temperature dyeing procedure was developed for the poly(ethylene
terephthalate) copolyester (MCDP) incorporated with sodium-5-sulfo-bis(hydroxyethyl)-isophthalate
(SIP) and 2-methyl-1,3-propanediol (MPD). The results obtained from
cationic dyeing at optimized conditions show an outstanding dye utilization
(99.0%) with MCDP, which is much higher than that of the conventional
SIP-modified copolyester. Meanwhile, the introduction of SIP and MPD
contents ensures the large adsorption and fast diffusion of dye molecules
into the amorphous region of fibers, allowing an efficient and deep
disperse dyeing of polyester fabrics under atmosphere in the absence
of carriers. The environmental benefits arising from high quality
dyed MCDP fabrics with ultradeep dyeing performance and excellent
color fastness through a facile and clean dyeing process are highlighted
with the economic ones
Additional file 1: of A New Smart Surface-Enhanced Raman Scattering Sensor Based on pH-Responsive Polyacryloyl Hydrazine Capped Ag Nanoparticles
Supplementary material. (DOCX 265 kb
Wearable Solid-State Supercapacitors Operating at High Working Voltage with a Flexible Nanocomposite Electrode
The
proposed approach for fabricating ultralight self-sustained
electrodes facilitates the structural integration of highly flexible
carbon nanofibers, amino-modified multiwalled carbon nanotubes (AM-MWNT),
and MnO<sub>2</sub> nanoflakes for potential use in wearable supercapacitors.
Because of the higher orientation of AM-MWNT and the sublimation of
terephthalic acid (PTA) in the carbonization process, freestanding
electrodes could be realized with high porosity and flexibility and
could possess remarkable electrochemical properties without using
polymer substrates. Wearable symmetric solid-state supercapacitors
were further assembled using a LiCl/PVA gel electrolyte, which exhibit
a maximum energy density of 44.57 Wh/kg (at a power density of 337.1
W/kg) and a power density of 13330 W/kg (at an energy density of 19.64
Wh/kg) with a working voltage as high as 1.8 V. Due to the combination
of several favorable traits such as flexibility, high energy density,
and excellent electrochemical cyclability, the presently developed
wearable supercapacitors with wide potential windows are expected
to be useful for new kinds of portable electric devices