Search

In this article, potassium hexacyanoferrate (K3Fe(CN)6) was introduced into poly(3,4-ethylenedioxythiophene) (PEDOT) hydrogel by in situ polymerization to prepare K3Fe(CN)6-doped PEDOT hydrogel. The specific capacitance of PEDOT hydrogel was efficiently increased by the doping effect of K3Fe(CN)6. The increase in capacitance achieved by introducing K3Fe(CN)6 into PEDOT hydrogel was attributed to the doping effect of anionic ferricyanide/ferrocyanide couple. The specific capacitance of PEDOT hydrogel increased from 38 F g−1 to the maximum value of 98 F g−1 (current density = 500 mA g−1) when the concentration of K3Fe(CN)6 reached 5 mM. On the basis of cycle life tests, the capacitance retention of about 75% for the doped PEDOT hydrogel after 5000 cycles suggested a high cycle stability of redox-active PEDOT hydrogel and its potential as an electrode material for supercapacitor applications.

Sodium montmorillonite was organized by a series of alkyl quaternary ammonium to make an organic modified montmorillonite (OMMT). The organic montmorillonite-resorcinol-formaldehyde-latex (OMMT/RFL) film was prepared by introducing OMMT into RFL, and aging and curing later. The OMMT was valued by X-ray diffraction and Fourier Transform Infrared Spectroscopy (FTIR). The adhesion of the OMMT/RFL-coated fiberglass was evaluated using an H-adhesion technique. The mass-gain of OMMT/RFL and the tensile properties of the coated fiberglass were studied under different humidities. The results show that the best moisture resistance could be gained while 16MMT at 1.5 wt%. Compared with the tensile properties of RFL, the tensile strength of OMMT/RFL increases by 21.2%, the tensile modulus by 23.1% under humidity of 98%; the OMMT/RFL displays a better dynamic storage modulus at elevated temperature.

A crystal silica was intermingled with an elastic ethylene-vinyl acetate polymer to fabricate an encapsulant and improve its thermal conductivity. The encapsulant showed not only an improved thermal conductivity and adhesiveness but also good thermal stability and tenacity. Its thermal conductivity with various sizes, dosage, and surface properties of silica (SiO2) was investigated using laser scattering method. The tenacity and adhesion properties were evaluated using dynamic viscoelasticity and peel strength, respectively. The integrated properties of the encapsulant were obtained while SiO2 reached to 80 wt portions in composite. Thermal conductivity of the composite was less dependent on the surface properties of SiO2.

Polymers are difficult to degrade completely in Nature, and their catabolites may pollute the environment. In recent years, biodegradable polymers have become the hot topic in people's daily life with increasing interest, and a controllable polymer biodegradation is one of the most important directions for future polymer science. This article presents the main preparation methods for biodegradable polymers and discusses their degradation mechanisms, the biodegradable factors, recent researches and their applications. The future researches of biodegradable polymers are also put forward.