The performance of spunbonded nonwoven is closely related to its pore structure. However, pore shape has been less studied than other measures of nonwoven pore structure suchastheporesizeandits distribution. In order to study the influence of processing parameters on pore shape in spunbonded nonwoven,thirty spunbonded nonwovens were produced using different combinations of metering pump and mesh belt frequencies. Using digital image processing technology, eight parameters were used to characterize the pore shape. Rough set theory, principal component analysis, and cluster analysis were used to reduce the attributes of these parameters. The results prove that rough set theory is better for attribute reduction than principal component or cluster analysis. The most representative pore shape parameters, i.e., compactness and eccentricity, were identified based on rough set theory. The results show that as the mesh belt frequency is increased, the value of eccentricity tends to increase and the value of compactness declines. In contrast, when the metering pump frequency increases, the value of compactness increases.

We have developed an actuator consisting of an ionic liquid gel electrolyte sandwiched between two nanofiber mat electrodes. The electrodes were fabricated by an electro-spinning technique followed by the vapor phase polymerization of poly(3,4-ethylenedioxythiophene) (PEDOT). The strain induced by the actuator sharply increased when the polymerization time of the electrode was more than 6 min. This actuator exhibited partial transparency, and could drive at very low voltage (1.5 V), comparing with the conventional dielectric actuators having transparency.

Poly(ethylene terephthalate) (PET) fabric was modified with bis[2-(methacryloyloxy)-ethyl] phosphate using 2,4,6-trimethylbenzoyldiphenyl phosphine oxide as photoinitiator via UV induced grafting to improve flame retardant performance. Effects of monomer concentration, initiator amount, grafting time and ethanol-water volume ratio on grafting yield were investigated. The chemical structure of grafted PET fabric was characterized by FTIR and SEM observation. Thermal behaviour of grafted PET fabric was investigated by thermal gravimetry analysis. The results indicated that the residual char of grafted samples reached 13.6% at 800^oC, which was higher than that of untreated fabric. The flame retardant bis[2-(methacryloyloxy)-ethyl] phosphate promoted formation of residual char, which improved the anti-dripping property and flame retardancy of PET fabric.