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(1) Background: Supercritical CO2 fluid (SCF-CO2)-assisted impregnation presents advantages on loading active drugs to polymer substrates, since it enables the realization of a drug-loaded polymer without any solvent residue. Besides, CO2 gas and drugs can be recycled and utilized again. Resveratrol-loaded diacetate fiber by SCF-CO2-assisted impregnation was done to give diacetate fiber biological activity function for enhancing its added value. (2) Methods: The effect of SCF-CO2 temperature, pressure and treatment time on loading ability (LA) of resveratrol onto diacetate fiber was explored by ultraviolet visible spectrophotometer. The variation of structure and property of diacetate fiber was analyzed by characterization instruments. (3) Results: LA had been increasing with SCF-CO2 treatment time, temperature and pressure when SCF-CO2 was above 70 °C, 12 MPa. The inhibiting rate of resveratrol to free radicals was affected positively by SCF-CO2. After resveratrol was impregnated by SCF-CO2 it appeared some small white granular substances on the surface of diacetate fiber. It had a good interaction between resveratrol and molecular chain of diacetate fiber. (4) Conclusions: Resveratrol was well-loaded onto the diacetate fiber by SCF-CO2 assisted impregnation. [ABSTRACT FROM AUTHOR]

To characteristic tensile behavior of woven fabric and identify tensile failure mechanism is still a challenging work. In this paper, a new acoustic emission-based method is applied for the characterization of textile fracture mechanism. A set of acoustic emission signal acquisition devices was used to collect the acoustic emission signals, which is equipped on the electronic fabric strength tester during stretching. The proposed Hilbert-Huang Transform processing method was developed to identify the acoustic characteristics of collected unsteady acoustic emission signals of the woven fabric, which can be used to describe both time and frequency information. The experimental results demonstrate that acoustic emission signal is affected by orthogonal friction between warp and weft yarns rather than the fabric structure. [ABSTRACT FROM AUTHOR]

via the acoustic emission technology, a method used for investigating the single fiber fracture sequence during tensile fracture process of blended yarn, which is made of different kinds of fiber was presented in this paper. As the fibers aggregate together after spinning process, the tensile strength of the yarn mainly originates from the strength of the fibers inside the yarn, as well as the cohesive force and surface friction between the fibers. In order to collect the acoustic emission signals generated during tensile fracture of the yarn and different single fibers, the acoustic emission technology was adopted. Firstly, the time-frequency matrix of the acoustic emission signal was constructed on the basis of Hilbert-Huang transform; subsequently, the singular value of the signal was obtained by singular value decomposition of the time-frequency matrix of the signal; ultimately, the singular value of the signal was judged by the fuzzy c-means cluster analysis. The results showed that the singular value can be used not only to characterize the fractures of different kinds of fiber in an efficient way, but also to identify the fiber fracture sequence during tensile fracture process of blended yarn, providing an excellent theoretical support for researching into the yarn formation process. [ABSTRACT FROM AUTHOR]

The configuration method of reasonable flame retardant fabric specification was studied. 26 kinds of flame retardant yarn with different formations were designed and processed.35 kinds of weft double fabrics with the same texture specification and 13 weft triple fabrics with same texture specification were woven. Among them, some were formed with different flame retardant yarn with layered configuration while some were corresponding homogeneous fabric.The breaking strength, tear strength and flame retardant index of each fabric were tested. The test results showed that the mechanical properties of fabric with flame retardant fiber layered configuration was normally lower than those of homogeneous fabric.The flame retardant property was better than that of homogeneous fabric.It was pointed out that part of flame retardant fibers with lower cost or even the common fibers could be used in flame retardant fiber layered configuration.So under the condition of keeping the same flame retardant property,the cost of flame retardant fabrics could be reduced and higher cost performance could be obtained. [ABSTRACT FROM AUTHOR]

Polyethylene terephthalate (PET) fabrics were coated with the coupling agent 3-glycidyloxypropyltrimethoxysilane and graphene oxide (GO) by conventional pad-dry-cure processing method. The coated PET fabrics burnt without the melting state and formed the denser and tighter char directly during the combustion. In order to explain the restraining effect of GO, the structure and thermal stability of the coated PET fabrics, the structure of the forming char after vertical burning test were discussed. The morphology images showed that GO formed the uniform film on the entire fabric surface and infrared spectra indicated the successful fabrication of GO on PET fabric by the presence of the peaks at 3420 cm-1 and 1732 cm-1. While the thermal stability changed slightly with coating and XPS analysis illustrated that the ratio of C/O decreased and the function group C = O increased. It can be shown that the addition of GO played the physical role in the dripping resistance of coated PET fabrics. [ABSTRACT FROM AUTHOR]

The color gamut space of color mixing for dyed cotton fiber was discussed. Cotton fibers were dyed with different dye dosage to obtain magenta, yellow and blue fibers. Their color characteristic value and spectral reflectance curve were tested. By comparing with magenta, yellow and cyan three-primary color ink of full point printing, the optimized magenta, yellow and cyan colored fibers were confirmed. Basic primary color fibers were taken with the optimized colored fibers. The color gamut space of mixed primary color fibers were studied. Then, it was compared with the color gamut space of mixed dyeing with primary color dyes and the color gamut space of primary color fibers used by enterprises. The results showed that certain color gamut space could be formed for both mixed primary color fibers after optimization and dying with the mixture of primary color dyes. However, they were both much smaller than the color gamut space formed with primary color ink. The color gamut space or the color generation of primary color fibers after optimization was smaller than that after dying with the mixture of primary color dyes. It is considered that the color gamut space of primary color fibers after optimization contains most of the color gamut space of primary color fibers used by enterprises. [ABSTRACT FROM AUTHOR]