Advanced Materials Research Vols. 821-822

Abstract: The natural color silk were treated by hydrogen peroxide, and the structure, crystallinity, mechanical properties and color properties of the treated natural color silk were analyzed. The results showed that the structure of treated natural color silk didnt change obviously, the treated and untreated color silk both have α-helical structure and β-sheet structure; the degree of crystallinity decreased a little, the crystallinity of un-treated natural color silk was 44.4%, while the crystallinities of natural color silk treated by hydrogen peroxide was 43.7%; the breaking tenacity and the breaking elongation of natural color silk declined slightly after the treatment of hydrogrn peroxide; the elastic modulus didnt change significantly; the K/S value decreased significantly and the L^*a^*b^* values changed after hydrogen peroxide treatment.

Abstract: Chitin fiber is a new type of green functional textile materials that can biodegradation, these years more and more people pay great attention to it for its excellent properties of antibacterial, moisture-absorption propertyetc etc.. On the basis of experimental examination, the length wise appearance and cross section appearance , the tensile properties, the moisture-absorbency, property , crystallinity, crientation, mass specific resistance and antibacterial property etc of the Chitin fiber are studied in this paper. The conclusions obtained in this paper have important reference value to the development of Chitin fiber product and its processing.

Abstract: Functional textiles are the fashionable concept,not only conform to the present society fashionable tide but also promote environmental development and it has very wide development space. Antistatic fibers play a vital role in ensuring the safety of people. The paper discusses the electrostatic hazards of textile materials and antistatic principle of textiles.

Abstract: Functional textiles are the new green concept,not only conform to the present society fashionable tide but also promote environmental development,and it has very wide development space. Antibacterial fibers play a vital role in preventing bacteria against human health,Antibacterial textiles have gradually came into peoples life and been paid more attention to by people.The paper discusses the antibacterial fibers classificationantibacterial mechanism and processing method,and introduces bast-fiberbamboo fiberchitosan fiberSeacell active fiberAmicor antibacterial fibermetal fiber and nanoantibacterial fiber.The trend of antibacterial fibers will be towards wider antimicrobial range,longer durability and more perfect function.

Abstract: The novel form-stable composite phase change materials (PCMs) of crosslinked PEGA and P(PEGA-HAM)/PEG gels were synthesized, which based on PEGA . Using crosslinked PEGA and P(PEGA-HAM)/PEG gels as the working substance , PP/PCM thermo-regulating fibers were prepared by blends via melt spinning respectively. TGA results indicate that the crosslinked form-stable PCMs have good thermal stability. The morphology of the surface of PP/PCM thermo-regulating fibers smooth mainly by SEM. The breaking strength of thermo-regulating fibers first increases and then decreases when increased some content of PCM. DSC results indicate the phase enthalpy of PEGA crosslinked gel and its the blend fibers with PP are 122.97J/g and 13.83J/g, while that of P(PEGA-HAM)/PEG crosslinked networks gel and its the blend fibers with PP are 107.48J/g and 4.62J/g respectively.

Abstract: Protection effects of milk thistle extract, benzophenone-3, and non-ionic silicon to hair fibers were compared by measuring protein degradation, tryptophan degradation, lipid peroxidation, tensile characteristics and color change of hair exposed to irradiation. Experiment results indicate that milk thistle extract is more marked in protection of protein, lipid, breaking work in hair due to its strong antioxidant ability, while benzophenone-3 is the most effective in tryptophan protection. Color protection was significantly observed in silicone and milk thistle extract treated samples. However, the synergy of milk extract with non-ionic silicone emulsion and benzophenone-3 with non-ionic silicone for protecting hair was not encouraged.

Abstract: The main materials of artificial fiber pulp are natural fiber from wood and linters etc. However, it will be more and more difficult to make this pulp in China because of the scarcity of forest resource and cotton field. Reed is widely distributed with high yield in china. Therefore, exploitation and utilization of reed in artificial fiber pulping have an important social significance. The artificial pulp made from reed was studied in this paper. The pulping method adopted pre-hydrolysis followed by Kraft cooking. The results showed that the great influence factors of pre-hydrolysis were the highest temperature and holding time. The optimal pre-hydrolysis conditions were: 175 °C, 75min, solid-to-liquid ratio 1:6. Under the conditions, semi-slurry yield was 60.8%. Compared with the chemical composition of reed materials, the pentosan decreased from 20.33% to 7.37%, the lignin decreased from 26.46% to 21.14%, ash decreased from 5.56% to 4.05%, besides the relative holocellulose increased from 75.95% to 81.26%. The dissolving pulp obtained after cooking and bleaching of semi-slurry met with pulp performance index requirement.

Abstract: In order to better understand the separation and cleaning of akund fibers and the potential for developing separation machinery evaluated, the sedimentation differences among single akund fiber, its seed and capsule are investigated. Based on the spherical degree, the mathematical model about free dropping velocity of single akund fiber is established and the dropping method is taken in the experiment. The dropping velocity of single akund fiber calculated by mathematical relationships is 0.0592 m/s, and the velocity calculated by dropping experiment is between 0.047 m/s~0.072 m/s, which average velocity is 0.0583 m/s. The dropping velocity of a third of capsule which is the main state after mechanical treatment calculated by dropping experiment is between 0.900~1.17 m/s. Moreover, the average dropping velocity of seed calculated by dropping experiment is 1.589 m/s. The dropping velocity of capsule and seed are much higher than that of akund fiber. And if there is no adhesion between akund fiber and capsule after mechanical treatment, the complete theoretical separation of akund fiber from its capsule and seed using airflow is possible.

Abstract: Taking the advantages of the unique features of phase change materials (PCM),it is possible to fabricate smart thermoregulated textiles through the effective combination of PCM and textiles. In this study, the candidates of PCM and its requirements suitable for the textiles were summarized, various manufacturing technologies of microPCMs and smart thermo-regulated textiles were reviewed. For the applications on a large scale, further research need to be conducted in aspects including new types of PCM, stability and durability of smart textiles, the advanced fabricating technology, performance of PCM microcapsules and its novel applications in textile industry, and relevant evaluation method and standard for the smart textiles.

Abstract: In order to compare differences between the structure and properties of pupa protein fiber and rousi fiber ,test morphology and molecular structure of fiber by using optical microscope, X ray diffraction, fourier transform infrared spectroscopy (FT-IR) . The results show that:the two kinds of fiber morphology consistent with the ordinary viscose, the pupa protein fiber crystallinity and degree of orientation are higher than the rousi fiber, and rousi fibers contain small amounts of metal elements, the pupa protein fiber mechanical properties, moisture absorption properties and heat resistance are superior to rousi fiber.