Feng Xiu Zhang

Surface Modification of Poly(ethylene Terephthalate) (PET) with UV/Nano-TiO2

The PET fabric surface was modified with ultraviolet radiation and nano-TiO2. The wettability and the broken strength of the modified PET fabric were studied. The results showed that with the increase of the ultraviolet radiation irradiation, the water contact angles of modified PET fabrics decreased greatly. Water contact angle of PET fabric modified with 40g/L nano-TIO2 and 60 min ultraviolet radiation irradiation could decreased to zero in 4.11 seconds. And the capillary rise height of modified PET fabric could increase from 1.1 mm to 110.2 mm. The spraying rate of modified fabric could decrease from 4 to 1 degree, and the water absorption could increase 89.86%. These showed the hydrophobic PET fabric could be modified to super hydrophilic PET fabric. The broken strength of modified PET fabric not only did not decrease, but also increased a little. The broken elongation kept well.

Dyeing of Cotton Fabric Modified by 2, 3-Epoxpropyl Triethyl Ammonium Chloride with Reactive Dyes

In order to improve the dyeing property of cotton fiber, in this paper, the cotton fabric was modified by 2, 3-epoxpropyl triethyl ammonium chloride (ETEAC). Four reactive dyes were employed to test the dyeing property of modified cotton fabric. The results showed that the dyeing property of cotton fabric was improved greatly. When the concentration of ETEAC was equal to or above 7%, most of the dye-uptake rate of the modified cotton fabric could reach to nearly 100%. And the dyeing rate was very high. These suggested that the cationic groups with three ethyls could attract anion dyes efficiently, though the cationic groups with three ethyls were greater than cationic groups with three methyls. The modified cotton fabric could not be dyed uniformly. Sodium dodecyl sulfate (SDS) was efficient retarder for the modified cotton fabric.

Adsorption Kinetics of Reactive Dyes on Silk with Octyl Butyl Dimethyl Ammonium Bromide as Accelerant

With octyl butyl dimethyl ammonium bromide (OBDAB) as accelerant, adsorption kinetics of dyeing silk with three reactive dyes was studied in this paper. As concentration of OBDAB increased, the dye-uptake rate increased. The highest dye-uptake rates of three reactive dyes could reach to 89.40%~98.98% and the concentration of OBDAB was only 6-8g/L. This showed OBDAB was an effective accelerant. Pseudo first- and second-order kinetic models were used to analyze the adsorption kinetic data. The experimental data were found to follow the second-order kinetic model. Meanwhile, the initial dye adsorption rates of reactive red dye B-3BF, reactive yellow dye B-4RFN and reactive orange dye B-2RLN increased as temperature increased, and the activation energy of them were found respectively to be 28.42,13.14,32.90 kJ/mol.The positive values of and obtained indicated that reactive dyes adsorption with OBDAB as accelerant was an endothermic process. The conclusion showed OBDAB was a potential accelerant.

Monomer Synthesis and Characterization of Novel Aromatic Polyamides

Aromatic polyamides are high performance materials, having outstanding thermal and mechanical properties. Poly(2,5-Diamino-terephthalic acid) (PATA) was designed as a novel aromatic polyamide with high strength and modulus. In this paper, 2,5-Diamino-terephthalic acid (DATA), as a monomer of PATA, was synthesized from 2,5-Dimetyl-1,4-phenyldiamine (DPA). First step was the amidation of DPA by reacting with acetic anhydride to protect amido group. Then N-(4–Acetylamino-2,5-dimethyl–phenyl)-acetamide (AMPA) was oxidized by potassium permanganate. Finally, AMPA was hydrolyzed by sodium hydroxide and the monomer DATA was precipitated by hydrochloric acid around PH 5. DATA and all the intermediate products were characterized and confirmed by 1HNMR and FT-IR spectra. They were all in great agreement with the proposed structure. The overall yield of DATA was about 40.0%.

Novel Silkworm Pupa Protein (SPP)/Polyester Fabric

Polyester has excellent mechanical properties and silkworm pupa protein(SPP) has good biocompatibility. In this paper, polyester was semi-inlaid with sucrose ester, and then grafted with SPP by self-made crosslinking agent. SEM photograph showed after grafting, a layer of compound was covered on the surface of polyester fiber. FT-IR spectra indicated that SPP had been grafted onto the polyester. The wearability testing showed that the SPP/PET fabric exhibited improved wettability and antistatic property as well as suitable crease elasticity and softness.

A Durable Superhydrophilic Modification of Polyester Fabric

In this paper, a durable superhydrophilic modification was applied to polyester fabric to improve its wettability- HAS treatment. The wetting ability of HAS treated polyester fabric improved a lot; the water contact angle could decrease to 00 in 3s; the water content increased up to 115%; the wicking distance increased up to 15cm; spraying rate improved to 1 degree. The wearability tests showed the breaking strength and creasability remain almost the same as untreated polyester fabric.

High Hydrophilic Poly(Ethylene Terephthalate)(PET) Fabric Modified by Ionic Agent

As the surface of polyester fabric is hydrophobic, it is not comfortable to wear. In this paper, the surface of polyester fabric was ionized by an ionic agent. The result showed that the ionized polyester fabric had wonderful hydrophilicity. The water contact angle of ionized polyester fabric decreased to 0o, and the capillary rise height increased from 0.4cm to 14.4cm, water content from 23.77% to 119.78%. Water spraying rate decreased from 4 degree to 1 degree. The whiteness of ionized polyester fabric kept well.

Preparing Gambiered Guangdong Silk with Ultraviolet Radiation and Normal Mud/Fe2+

in order that Gambiered Guangdong Silk can be made in normal area with modern technology, the ultraviolet radiation light was instead of sunlight, normal mud/Fe2+ was instead of Pearl River mud. The Gambiered Guangdong Silk was prepared by ultraviolet radiation light and normal mud/Fe2+. The result showed that ultraviolet radiation light and normal mud/Fe2+ could produce Gambiered Guangdong Silk. The color of silk fabric made by ultraviolet radiation light and normal mud/Fe2+ was almost same as that of silk fabric made by sunlight and Pearl River mud. The thickness of silk fabric made by ultraviolet radiation light and normal mud/Fe2+was approximate to that of ilk fabric made by sunlight and Pearl River mud. These means the Gambiered Guangdong Silk can be made in normal area.

The Interaction between Reactive Dye and Octyl Trimethyl Ammonium Chloride

Octyl trimethyl ammonium chloride (OTMAC) is a very efficient accelerant for reactive dyes on dyeing silk. In order to understand the accelerating mechanism, the interaction between dye molecules and OTMAC molecule was studied in this paper. The results showed that the DTMAC made the dye molecules assembled and the particle size of dye assemblages could reach to more than 500nm. The assembling of dye molecules leads to increase of the maximum absorption wavelength of dye. The higher the temperature is, the weaker the interaction between dye molecule and accelerant.

Accelerating Mechanism of OHDAB on Silk with Reactive Dye

OHDAB (Octyl Hexyl Dimethyl Ammonium Bromide) is an efficient accelerant for reactive dyes on dyeing silk. The accelerating mechanism of OHDAB was studied in this paper. The results showed that OHDAB could make dye molecules assembled and the particle size of dye aggregate increased with the increase of OHDAB concentration. OHDAB could neutralize the negative charge of silk; even the zeta potential of silk could become positive with the increase of OHDAB concentration.