Papers by Keyword: Cotton Fabric

Abstract: In order to get clear cotton rustling sound signal, which will be analyzed to provide information at a certain stage of fabric processing for developing cotton products, before analysis of the data, it is the need for de-noising processing. The two de-noising methods, the median filtering method and the wavelet method are proposed in this paper. Their principles and algorithms are described. The cotton sound signals are exposed to interference and influence of some kinds of noise signal in the process of the data measured. So in practical applications, the two de-noising methods are used to process cotton rustling sound. The results of the process show the methods of processing the cotton sound signal are effective. The clear signal is getting to the next research.

Abstract: The clean dyeing of cotton fabric was realized using UV-induced photografting of modified reactive dye. The reactive dye was interacted with 2-methyl-3-buten-2-ol to introduce C=C double bonds. The modification conditions of reactive dye were discussed. The dyed cotton fabric was measured by color difference, scanning electron microscope(SEM),and attenuate total reflection Fourier Transform infrared(ATR-FTIR). Under the conditions of pH value of 8, C.I. reactive red dye 198/2-methyl-3-buten-2-ol mole ratio of about 1:3, interaction time of 40 min, interaction temperature of 70°C, and dye concentration of 40g/L,good color depth of cotton fabric was achieved. The results of SEM and ATR-FTIR verified the occurrence of graft polymerization.

Abstract: Immerse cotton fabric into the TiO2 sol directly, which is produced by Titanate hydrolysis. Make cotton fabric and nano-TiO2 bind directly, so that the treated cotton fabric obtain a better decomposition of organic stains function. Combination fastness of fabric and TiO2 , self-cleaning function , regain , breaking strength , permeability , wrinkle recovery angle were tested.The results showed that: the fabric coated with nano-TiO2 has a self-cleaning function, good fastness, wrinkle recovery angle increases, moisture regain, tensile strength and permeability decrease slightly.

Abstract: Substances extracted from the scutellaria based on the boiled were introduced to make the cotton fabrics achieve a good antibacterial properties. Specifically, the orthogonal experiment was designed based on four factors such as the concentration of extraction (compared with the original extraction), temperature, pH and mordant dyeing methods. It is proved that the cotton fabrics in such conditions, for instance, the scutellaria concentration of extraction of 80%, pH value of 9, at 80°C and the media reprocessing, can acquire a good antibacterial properties, and the bacillus subtilis antibacterial rate can reach 86.69%. Simultaneously, the rate of antibacterial against escherichia coli can reach 74.77%. It can still keep a good antibacterial properties after three times washing and ten times washing, and the bacillus subtilis inhibition rate is approximately 84.73% and 72.37% respectively, and the E. coli antibacterial rate is approximately 70.78% and 64.27% respectively.

Abstract: Poly2-methyl acrylate-N-methyl pyridinium iodide (PMAMPI) was used as a new cationic agent to pretreat cotton with dip-pad-bake method. The pretreated cationic cotton showed electropositive in the process of dyeing with reactive dye. The thesis has studied the optimized process for salt-free dyeing conditions. In the optimized salt-free dyeing process, the cotton fabrics treated with PMAMPI showed a good performance compared to those in the process of traditional salt dyeing. The results showed that color yield and color fastness of the reactive dyes on the cationic cotton were satisfied. The three dyes with best color matching performance include reactive dark red WGE, reactive navy blue WTE and reactive golden yellow WRE.

Abstract: Natural dye was extracted from the mangosteen pericarps using UE method. The work dealed with the investigation of cotton fabric samples dyed with natural dye. The effects of different dye concentrations and pH values were estimated by the dye-uptake(K)and the color difference(△E). And the effects of different dyeing methods of direct dyeing, pre-mordant and after-mordant were tested when alum was used as a mordant. The highest K and △E were obtained on using pre-mordant method when dye concentration was used as 30g/L and pH value as 3. And the color fastness properties of rubbing, washing and perspiration were tested. Compared with the pre-mordant method, it was quite satisfactory for after-mordant method where its ranged between 2-3 to 4-5.

Abstract: Foaming finishing was a kind of dyeing and finishing technology with obvious energy saving effect. In this paper performance of foaming stock solution, compatibility of foam system, foaming finishing of cotton fabrics was investigated. The initial solution time, half life and foaming ratio of lauryl sodium sulfate as anionic foaming agent were determined. The obtained results indicated that advantages of foaming finishing of cotton fabrics included obvious low up-take and less pollution in crease resistant and water repellent finishing. The finishing performances of cotton fabrics with foaming finishing were the same level with that of the conventional padding finishing process

Abstract: To increase the utilization of X-reactive dyes, reduce dyeing waste water, protect the environment and promote wider use of eco-dyeing technique, cycle technique was used to improve the reactive dyeing on cotton fabric. The results of experiment showed that hydrolysis X-reactive dye for one-bath-two-step dyeing can be effectively activated by activator in the residue and remains the original dye activity. The obtained results also indicated the cycle dyeing can be implemented 6 times by adding quantitative X-reactive dye, and dye used in cycle dyeing was less than that of the normal dyeing process. The K/S values, washing color fastness, rubbing fastness and breaking strength of the cycle dyeing sample changed a little in comparison with those of the conventional dyeing technology.

Abstract: Ag-doped nano-TiO₂ sol was prepared at a low temperature and was used to finishing cotton fabrics, and observed the crystal structure and the dispersion of nano-TiO₂ on the fabric by X-ray diffraction (XRD) and scanning electron microscope (SEM); Discussed the influence of different amount of silver on antibacterial properties; Studied the impact of different finishing methods on UV resistance performance as well as the degradation of methylene blue and VOC performance. Results showed that Ag-doped nano-TiO₂ on the fabric which was finished by steaming method with the sol agent were anatase phase,and its particle size was 20-40 nm, when the molar ratio of tetrabutyl titanate and silver nitrate was 70:1, the Bacteriostatic rate was 99.9%, and fastness to washing was well, UV resistance and degradation of MB and VOC performance had greatly ascended, and less influence on the fabric performance.

Abstract: The possibilities of obtaining active soybeancotton fabrics were examined. An effective two-stage method was developed. The first stage involves the formation of dialdehyde cellulose by the sodium periodate oxidation of cotton fabrics, which is able to form Schiff base with soybean protein. In the second stage, soybean grafted cotton fabrics were prepared by subsequent treatment of oxidized cotton fabrics with a solution of soybean protein in aqueous acetic acid. The technical conditions of oxidized cotton fabrics with soybean protein graft were studied, the internal structure and wearability of oxidized cotton fabric after soybean protein treatment were respectively measured and analyzed in this paper. The results of infrared spectra indicated that the C=N of chemical bond was formed between the aldehyde groups in oxidized cotton fabrics and the amino groups of soybean protein, and the soybean protein cross-linked on the surface of oxidized cotton fabrics by a series of reactions. Meanwhile, the calculating results on the separating peaks and imitating curves of X-ray diffractive curves illuminated that the crystallinity of the oxidized cotton fabric after soybean protein modification decreased from 67.83% to 62.35%. After soybean protein treatment, the breaking strength and elongation of the fabrics slightly decreased, whereas the wrinkle recovery angle and moisture absorption of cotton fabrics remarkably increased.