In the paper, preparation and properties of pullulan composite films were studied. Several kinds of materials (glass, iron, steel, propene polymer and polyvinyl chloride plates) were chosen for preparing films. The results showed that the steel plate was the most suitable material for preparing film. The tensile strength of pullulan film was significantly reduced when the drying temperature was higher than 50°C. The time of dissolution observably decreased, whereas water vapor permeability increased with increasing drying temperature. Pullulan film has higher tensile strength, better water barrier properties, shorter solubilization time and lower elongation at break than those of hydroxypropylmethylcellulose film, respectively. The composite film (Pullulan and hydroxypropylmethylcellulose) with weight ratio (1/2) has higher tensile strength, better water barrier properties, longer solubilization time than those of other ratios. Difference properties of films could be obtained in different weight ratio (Pullulan and hydroxypropylmethylcellulose).

In order to determined the antibacterial property of Apocynum venetum. Three kinds of extractants (distilled water, 75% ethanol and absolute ethanol) were used to extract the leaf, stick and skin of Apocynum venetum, respectively. Flask and plate methods were used to evaluate the antibacterial property of these extracts on four kinds of classical microbiologies, Escherichia coli, Staphylococcus aureus, Saccharomyces cerevisiae and Aspergillus niger, respectively. The results showed that the antibacterial rate of extract by 75 % ethanol was better than extracts by water or absolute ethanol on Escherichia coli and skin contained more antibacterial substance (on Escherichia coli) than others. The antibacterial rate of extract by distill water was better than extracts by 75 % ethanol or absolute ethanol on Staphylococcus aureus and stick contained more antibacterial substance (on Staphylococcus aureus) than others. Some of extracts had very weak antibacterial rate on Saccharomyces cerevisiae and all extracts had not antibacterial effect on Aspergillus niger.

Along with the booming development of multi-component blending fabrics, the accurate detection of component of fabrics has become a major goal in textile testing. Terahertz sensing technology provides a new way for detecting the materials. THz time-domain spectroscopy (THz-TDS) is a novel spectroscopic technique which measures the electric field of the radiation through a sample and provides the phase and amplitude changes of the radiation, which can provide information unavailable through conventional methods such as microwave and X-ray techniques. In this investigation, THz-TDS technology was introduced into the textile differentiation. Three kinds of cellulose textile fibers, cotton fiber, bamboo fiber and viscose fiber, were prepared as the sample and detected by THz-TDS at room temperature in the absence of vapor. The temporal and frequency signals of the fibers were obtained. In the THz absorption spectrum, the characteristic absorption peaks of textile fibers in THz wave band were found, which can be used to recognize the fibers. This approach provides a novel non-contact examine method for fiber identification in complicated textiles.

Evolutionary engineering is a novel whole-genome wide engineering strategy inspired by natural evolution for strain improvement. Terephthalic acid (TA) is the most important starting material for making synthetic products, especially polyester fiber and plastics. Both TA and its manufacturing wastewater show acute, chronic and molecular toxicity to organisms. In textiles manufacturing, alkali de-weighting finishing of polyester fabrics was a main resource for producing waster water containing TA. Microorganisms can hardly adapt to the high pH caused by the alkali in wastewater of alkali de-weighting process. Although the strain for TA biodegradation already have been isolated, it is necessary to develop new innovative methods of treating TA in alkali de-weighting wastewater effectively. In this investigation, evolutionary engineering was applied to improve the characterization of Bacillus strain and the high pH resistance phenotypes were obtained. The approach of selection procedure presented in this investigation may provide an attractive promising alternative for improvement of pH resistance strain.

In this research, the B/A/S composite yarns were fabricated using the stainless steel wires as core yarn, antibacterial nylon and bamboo charcoal polyester filaments as inner wrapped yarn and outer wrapped yarn, respectively. The composite yarns with a wrapping number of 8, 11, 14 turns/cm were fabricated on a hollow spindle spinning machine. Furthermore, the composite fabrics were woven with the B/A/S composite yarns as weft yarns and the PET as the warp yarns. These fabrics were evaluated in terms of far infrared (FIR) emissivity and the air permeability. The presence of the bamboo charcoal was found to increase the FIR emissivity. The highest of the FIR emissivity was obtained when the weft yarns with a wrapping number of 11 turns/cm. The lamination numbers of the woven fabrics varied from 1-5 layers. The far infrared emissivity and air permeability of the woven fabrics was 0.94 and 268 cm3/cm2/s when the lamination numbers was 2 layers and the wrapping number was 11 turns/cm.