Da Yang Wu

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.

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.

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.

Super Wettable Poly(Ethylene Terephthalate)(PET) Fabric Modified by UV/Nano-TiO2/H2O2

The poly(ethylene terephthalate)(PET) fabric was modified by ultraviolet radiation, nano TiO2 and H2O 2 . The results showed that PET fabric could be modified to super wettable fabric, the contact angle of PET fabric irradiated by ultraviolet radiation for 50 min could decrease to 0o in 3.29 second. The Scanning electrical micrograph(SEM) showed there were lots of oxidized products on the surface of modified PET fibers. FT-IR spectra showed modified PET fiber had –COOH, and probably had –NO2. The X-ray diffraction showed the crystallinity increased greatly, and had two new diffraction peaks.

A Novel Durable Stiffness Finishing of Cotton Fabric

In this paper, poly (vinylalcohol glycidyl ether) (PVAGE) was synthesized as a novel reactive stiffening agent to improve the stiffness of cotton fabric. Cotton fabric could be grafted with PVAGE under high temperature and the grafting rate would increase with the increase of PVAGE concentration. The cotton fabric grafted with PVAGE has excellent washing durability. The wearability of cotton fabric grafted with PVAGE was also studied. As the increase of grafting rate, the flexural stiffness increased dramaticly; tensile strength increased a little; cockle elastic decreased slightly; and air permeability and whiteness also decreased but were still in acceptable range.

High Functional PET Sericin Composite Fabric

Though poly(ethyleneteraphthalate)(PET) fabrics have high initial modulus, outstanding creasability and wash-well character, but its hydrophilicity and biocompatibility are very poor. In this paper, the PET fabric was encased sucrose ester at high pressure and high temperature to endue it enough hydroxyl to grafting protein. The sericin was grafted on PET fabric by sucrose eater glycidyl ether (SEGE). The FT-IR spectra showed that sericin was grafted on PET fabric, and the structure of sericin was random coil conformation. X-ray diffraction spectra showed the structure of PET fiber did not changed. DSC showed the thermostability increased a little. After the PET fabric grafted with sericin, the hydrophilicity of PET sericin composite fabric was improved greatly, the cockle elasticity kept well, and the broken strength in creased a little. Certainly, the whiteness and air permeability decreased a little. The PET sericin composite fabric was high functional.

Modifing PET Fabric Surface with Peanut Protein

The poly(ethyleneteraphthalate)(PET) fabric was semi-encased sucrose ester at high pressure and high temperature to endue it enough –OH, and then the PET fabric was modified with peanut protein through crosslinkage. The FT-IR spectra showed the peanut protein was grafted on PET fabric, the X-ray diffraction spectra showed the structure of grafting peanut protein was random coin, and DSC thermograms showed the thermostability of PET fabric grafted peanut protein kept very well. The wearability of PET fabric grafted peanut protein was measured too. The results showed the hydrophilicity and antistatic property of fabric was improved greatly, the cockle elasticity and broken strength kept very well. Though the whiteness of fabric decreased after grafting peanut protein, it could be bleached with normal method. These showed the PET peanut protein composite fabric was high functional.

Preparation and Property of Bamboo Silk Fabric

In this paper, natural bamboo yarn and silkworm silk, bamboo pulp yarn and silkworm silk were twisted together to make bamboo silk yarn. And then they were weaved to bamboo silk fabric. The properties of bamboo silk fabrics were studied too. The results showed that bamboo pulp silk fabric was very soft, suitable to make underwear and shirt etc. Natural bamboo silk fabric was relative stiff, suitable to make outwear. All the bamboo silk fabric had wonderful anti statistic property; their cockle elasticity property was equal to silk; the whiteness, moisture regain and moisture permeability were very good. These showed the bamboo silk fabric not only had the properties of bamboo fibers, but also had the properties of pure silk fabric. Then they were suitable to be fabric of garments.

Dyeing Acceleration Theory of Molecule Companion on Silk with Reactive Dyes

In this paper, a novel high efficient dyeing acceleration theory of molecule companion(DATMC) on silk with reactive dyes was invented and studied. Organic cations were used as accelerants to company reactive dyes to dye on silk, and the dyed silk was washed with anionic surfactant. The results showed that the dye-uptake rates were very high, nearly 100%. But if the carbon atom number of hydrophobic hydrocarbon chain of organic cation was equal to or more than 12, the organic cation would affect the fixation reaction of reactive dye on silk. On the contrary, if it was equal to or less than 8, the fixation reaction would be accelerated. The fixation rates were 98.10% and 98.48% with octyl trimethyl ammonium bromide(OTAB) and hexyl butyl dimethyl ammonium bromide(HBDAB) as accelerants, respectively. The fastnesses of dyed silk were 4-5, and the silk could be dyed uniformly if the accelerant was added in several times.