Advanced Materials Research Vols. 332-334

Abstract: Silk fibers was degummed by different methods: sodium carbonate, neutral soap, tartaric acid, 2709 alkaline proteinase and hot pressurized water.The physical properties and secondary structure of silk and the CODcr of degumming wastewater were investigated to elucidate the effects after different degumming treatment.The results showed that the silk sericin was almost removed completely through various degumming methods, the degumming effects on silk including the appearance, the mechanical properties and the CODcr of degumming wastewater were different. Compared with five degumming methods, the surface morphology of degummed silk fiber was very smooth and fine, except hot pressurized water.The tensile strength of silk fibers degummed by all of the methods was decreased to some excent. The molecular conformation estimated by Fourier transform infrared spectroscopy stayed unchanged regardless of different degumming methods. The CODcr of wastewater degummed with different methods showed obvious difference, soap degumming wastewater was much higher than that of sodium carbonate degumming wastewater.

Abstract: Three new fluorescent brighteners (FBs) were synthesized and compared with traditional FBs. Their UV/visible absorption and fluorescence emission characteristics were studied. Compared with traditional products, the new fluorescent brighteners had better optical performance, high solution and low pollution.

Abstract: The eco-friendly cattail technical fiber obtained through degumming process, could meet the basic spinning conditions in aspects of fiber length, thickness and strength etc. It was difficult for cattail fiber to spin by itself. The cattail fiber blending with cotton was spun on ring spinning machine according to four different blending ratios. The properties of the blending yarn were tested and analyzed as well. The result reveals that the cattail fiber is capable for spining with cotton fiber together. The strength of the three blending yarn is higher than that of the pure cotton yarn. The strength is the highest when the blending ratio of cattail and cotton is 20/80. The amount of thin places, slugs of blending yarn increase while the neps, breaking elongation decrease according to the rise of the content of cattail fiber.

Abstract: Abstract. Several convert processes, e.g. Scouring, Bleaching, Heat setting, High temperature & high pressure dyeing (HTHPD), which might damage the breaking strength of PU filaments were examined in this research. The influence of temperature, time and elongation percentage in heat setting was discussed in particular. The experimental results show that the dominant processes which damage the PU filaments are heat setting and HTHPD. The breaking strength retention of PU filaments range between 51.74%-84.03%, 67.64%-74.67%, respectively after heat setting & HTHPD. The higher the elongation percentage, the lower the heat setting efficiency.

Abstract: With the development of the automotive market, automotive interior fabric design becomes an important category of textile design. The design of automotive interior fabric in our country is more focused on the design and research of comfort, safety, health and other functional aspects. At the same time, the artistic and personalized decorative design hasn’t been paid enough attention .The material quality, the color and pattern design of the automotive interior fabric play an important role in shaping the style of overall vehicle interior environment. The diverse styles of the automotive interior fabric design have an important practical significance for the car companies to create distinctive products and meet the needs of different consumers.

Abstract: Tensile strength of the viscose fibers is significantly influenced by the environment moisture. In this paper, single-fiber strength tester and single-yarn tester were adopted to test the strength of the viscose fiber and filament with different moisture contents. The results showed that the strength property of viscose filament was decreased after moisture absorption. When the moisture content of the yarn increases, the strength of the filament improved gradually and increments tend to be stable.

Abstract: Kenaf nanofibers (NF) were isolated from the kenaf pulp using mechanical isolation methods (refining with super grounding and high pressure homogenization). The kenaf NF were acetylated to produce hydrophobic NF. FTIR results displayed a successful acetylation of the NF. X-ray analysis exhibited that the acetylation process reduced the crystallinity of kenaf NF but also that isolation to NF leads to higher crystallinity than corresponding micro-sized fibers. The contact angle measurements indicated that the acetylation treatment changed the surface characteristics of the kenaf NF from hydrophilic to more hydrophobic.

Abstract: Alkaline cooking is common method for fiber degumming. Microwave was used to improve the degumming process of sisal fiber in this study, and the influence of degumming time, degumming temperature, and the solution composition on degumming result under microwave heating was probed. The experiment results show that microwave heating has significant effect for sisal fiber degumming. The optimal parameters for sisal fiber degumming, such as microwave heating at 100 °C for 30min in 3% NaOH solution, were also obtained.

Abstract: Pristine polyacrylonitrile (PAN)-base carbon fibers (P-CFs) was functionalized with 4-Aminobenzoic acid via ‘‘direct’’ Friedel-Crafts acylation in a mild reaction medium of polyphosphoric acid (PPA)/phosphorous pentoxid (P2O5). Fourier transform infrared spectroscopy, Raman spectroscopy, Scanning electron microscopy were applied in this study to demonstrate that PAN-base carbon fibers inherently have functional groups on their surface as a result of the reaction. The overall evidence indicates that the 4-Aminobenzoic acid functionalization of carbon fibers can be achieved without oxidation as pre-treatment. Thus, amine functionalized CFs（F-CFs）can be synthesized, without disrupting the strength of the carbon fibers.

Abstract: A type of benzoic acid end-capped ploy(ester-imide-ether) (PEIE) block copolymers was synthesized by melt polycondensation from polytetrahydrofuran diol (PTMG), 1,4-butanediol (BD), benzoic acid (BA) and a diacid monomer which was synthesized of trimellitic anhydride (TMA) with para aminobenzoic acid (PABA). The structures and properties of the copolymers were investigated by FT-IR spectroscopy and Ubbelohde viscometer, DSC and TGA. Some properties of the copolymer fibers such as breaking strength, breaking elongation and elasticity were also measured. The result demonstrated that the adding of BA can effectively reduce the inherent viscosities of PEIE. Especially the breaking strength, elastic recovery and heat stability of the fibers are improved obviously when adding 1 % (of the multiblock copolymer weight percentage) BA end capping agent.