共查询到20条相似文献,搜索用时 10 毫秒
1.
A poly(tetrafluoroethylene) (PTFE) sputtering technique was employed to introduce water repellency onto the surfaces of commercial
cotton fabrics. Sputtering power, time, and argon pressure were varied as processing parameters, when PTFE coatings were applied
on the fabrics. Total 27 different samples were prepared to compare their water repellent properties, which were investigated
by contact angle measurements. Morphology of the PTFE coatings were probed by scanning electron microscopy (SEM) and atomic
force microscopy (AFM). Also, the extent of the coating was examined by X-ray photoelectron spectroscopy (XPS). Maximum hydrophobicity
was obtained when PTFE coating was extensive enough to cover cotton fabrics almost completely, and the extensive coating was
the roughest among the samples prepared in this study. 相似文献
2.
Haidong Zhang Yi Huang Chenglong Wang Lili Wang Jianzhong Shao 《Fibers and Polymers》2016,17(3):396-401
To decrease the pollution discharge and energy consumption resulting from textile finishing using the conventional pad-dry-cure process, a blue light-curable digital finishing for textile was innovatively proposed. Based on the mechanism of blue light curing technique, a combination of the blue light curing process and anti-UV finishing was established in this study. A blue light-curable anti-UV finishing solution containing oligomers, monomers, photoinitiators, and anti-UV agents was padded onto the surface of the cotton fabrics, and then cured to form a tough film under blue light irradiation. The ultraviolet protection factor (UPF) value of the finished cotton fabrics was 50, the top level of international standards, demonstrating excellent UV resistance. The finished cotton fabrics also showed good rubbing and washing durability, and acceptable handle. The integration of an anti-UV finishing with the blue light curing technique presents some unique advantages in terms of environmental protection and application potential. 相似文献
3.
Our study proposes an enzymatic scouring method for cotton fabrics using the enzyme cutinase. We established cutinase treatment
conditions for cotton fabrics from their relative activity at different pH levels, temperatures, enzyme concentrations, and
treatment times. Weight loss, moisture regain, K/S value, tensile strength, and SEM micrographs of cotton fabrics were analyzed. We determined the optimum cutinase treatment
conditions to be as follows: pH of 9.0, temperature of 50°C, cutinase concentration of 100 %, and a treatment duration time
of 60 min. We discovered that this cutinase treatment hydrolyzed the cuticle of cotton fabrics. The cutinase treatment did
not decrease the moisture regain and the K/S value. The optimum concentrations of Triton X-100 and calcium chloride, which were used as auxiliaries for cutinase treatment,
were found to be 0.5 % (v/v) and 70 mM, respectively. Some cracks were observed on the surface of the cotton fibers; however,
the tensile strength did not decrease. 相似文献
4.
Chuan Ding Jian-Chun Zhang Xue-Qiang Liu Xin-Xing Feng Hua Zhang Kan Lai 《Fibers and Polymers》2014,15(9):1895-1901
Electron beam irradiation grafting of acrylic acid (AAc), acrylamide (AAm), and dimethyl vinylphosphonate (DMVP) onto poly(ethylene terephthalate) (PET) fabrics was performed using a high-energy electron accelerator. Parameters affecting the graft polymerization of PET fabrics, including absorbed dose and monomer concentration, were investigated. Fourier transform infrared spectroscopy analysis confirmed that the monomers were grafted onto the PET fabrics. The thermal behavior of the grafted PET fabrics was investigated with thermogravimetric analysis. Findings showed that grafting with AAm could improve the thermal stability of PET. The limiting oxygen index values and vertical flammability test results showed that PET fabric graft-polymerized with AAc could improve the flammability and prevent melt dripping. Grafting with AAm and DMVP could improve the flame retardation property of PET fabric. Scanning electron micrographs showed that the surface morphology of the PET fabric samples was significantly influenced by graft polymerization, and that grafting with AAc could promote the formation of residual char and impart an anti-dripping quality to PET fabrics. 相似文献
5.
This study investigates polyacrylonitile(PAN) fibers stabilized with various doses of electron beam irradiation (EBI) ability to produce carbon fibers. Feasibility was verified by FT-IR, the percent of gel fraction, density, DSC, XRD, and mechanical measurements. FT-IR spectra showed that the intensities of the stretching C??N bonds decreased at 2,244 cm?1 with increasing EBI dose. This de crease was related to cyclization of nitrile groups during EBI-stabilization. The degree of cyclization was determined from the gel fraction and density tests. The gel content and density of PAN fibers stabilized by EBI increased with an increase in the EBI dose. Thermal properties were characterized by differential scanning calorimetry (DSC) and thermally activated reactions. DSC curves showed that EBI treatment influenced the quantity of released heat and the exothermic position at low temperature over a wide temperature range. The strongest diffraction peak from the PAN precursor fiber arose from the (100) plane; its stabilization index (SI) was evaluated by X-ray diffraction. The X-ray results showed that the peak intensity decreases gradually with increasing EBI dose. In addition, tensile strength decreased the EBI stabilization level. 相似文献
6.
Polyolefin elastomers were extruded to form films and subjected to electron beam (EB) irradiation at various energy levels. The film samples were characterized to illuminate the effects of EB-induced cross-linking through measurements of gel contents, Fourier transform infra-red (FT-IR) spectroscopy, and variations of tensile properties of the films after the EB irradiations. The EB irradiations introduced crosslinking among the molecular chains resulting increases in initial modulus. The elastic recovery was 83 % at 30 % stain, which is increased by 10 % at 150 kGy compared with pristine. The maximum stain was 1,400 % at 150 kGy which is comparable with commercial polyurethane elastomer. 相似文献
7.
Cotton samples were pre-treated with various sol solutions containing different alkoxysilanes (TEOS, GPTMS, APTES, and TESP-SA).
The as-prepared cotton samples were dyed with 2 % owf Red and 4 % owf Blue. Furthermore, dyed cotton samples were after-treated
with the alkoxysilanes. The alkoxysilane were also incorporated into the dyeing bath. The as- prepared cotton samples were
subjected to a treatment with the non-formaldehyde durable press finishing agent BTCA in conjunction with the catalyst SHP.
The textile materials were evaluated with respect to the colorimetric data (L*, a*, b*, ΔE*) and the color strength expressed in terms of K/S values. Tensile strength and dry crease recovery angles of the durable pressfinished samples were measured. The findings
indicate that APTES and TESP-SA exert a significant influence on the color properties. 相似文献
8.
To investigate the sound properties by low-speed frictions (0.2 m/s and 0.5 m/s) which occur when two fabrics are rubbed by
wearer’s slow movement, six specimens are selected by cluster analysis among seventy-one vapor permeable water repellent fabrics
for outdoor sportswear. Their sound spectra are obtained from the FFT analysis. Physical sound properties (LPT, ΔL, Δf) and Zwicker’s psychoacoustic parameters-loudness(Z), sharpness(Z), roughness(Z), and fluctuation strength(Z)-are calculated
from the sound spectra. Mechanical properties of the fabrics are measured with the KES-FB system. The amplitudes of the sound
spectra of all the specimens at 0.5 m/s are higher than those at 0.2 m/s throughout the entire range of frequencies. As the
frictional speed changed from 0.2 m/s to 0.5 m/s, the LPT increases about 16 dB, and the loudness(Z) and fluctuation strength(Z)
increase about 3 times and 2 times, respectively. The SMD and Weight at the two low frictional speeds are the important factors
which affect the sound properties of vapor permeable water repellent fabrics. 相似文献
9.
电子束辐射诱变及克隆选择培育好好芭抗寒无性系的研究 总被引:6,自引:1,他引:6
利用电子辐射处理好好芭试管苗,从改变基因型入手提高其抗寒力,以获得稳定遗传的好好芭株系。研究表明150GY的辐射量是诱发好好芭发生变异的最佳剂量,结合生化标记,抗寒相关的酶类——淀粉酶和过氧化物酶活性分析,人工模拟低温实验的克隆检测,筛选出了具有较高抗寒能力的好好芭株系,这些株系通过无性系繁殖可用于抗寒育种。 相似文献
10.
Hydrophobic polypyrrole-coated fabrics with improved electrical conductivity were produced embedding oleic acid as counter-ion. Hydrophobisation of polypyrrole was carried out by means of an ion exchange process after deposition of polypyrrole on cotton fabrics. The fabrics coated with oleic acid-doped polypyrrole showed contact angle of 111°, drop absorption time of 7 minutes and high water repellence, while electrical conductivity increased of ~2 times and heat generation improved, too. Moreover, oleic acid demonstrated a great stability as counter-ion in polypyrrole matrix being present also after washing. 相似文献
11.
Ligen Zhu Lixia Zhang Lei Wu Yongyuan Sun Zikui Bai Jie Xu Guijie Liang Weilin Xu 《Fibers and Polymers》2014,15(9):1804-1809
Cotton fabrics were coated with conducting polypyrrole (PPy) by mist polymerization derived from aqueous solution of pyrrole (Py) with ferric chloride (FeCl3) as oxidant. The polymerization conditions, such as the reaction time and the concentrations of monomer and oxidant, were systematically investigated. The prepared PPy-coated fabrics could keep their temperature at about 24–44 °C when charged by a fixed DC voltage of 1–3 V. The results indicate that these PPy-coated fabrics can be used potentially as heating pads and integrated into the apparel to make the wearer warm enough using a portable battery. Furthermore, such fabrics are more comfortable than the conventional heating pads due to their flexibility and breathability. 相似文献
12.
High performance cellulosic fabrics are of increasing attention as a wearable fabric with special functions. The current report deals with preparation of multifunctional cotton fabrics by using simple and facile layer by layer technique. Firstly, silver nitrate was reacted with carboxymethyl cellulose to prepare Ag nanoparticles-carboxymethyl cellulose composite. Multi-layers of the so-obtained composite were applied on the cotton fabrics using pad-dry-cure method. Ag nanoparticles were deposited with mean size of 18.2 nm onto cotton fabrics which served as a cross linker between carboxymethyl cellulose macromolecules and cotton macromolecular blocks. Application of composite multilayers brought new properties for the finished cloths such like coloration, ultraviolet resistance, electrical resistance and biocidal action. The ultraviolet transmission radiation was significantly reduced to 7-10 % after applying ten composite layers. Valuable antibacterial textiles which are required in different medical purposes could be successfully produced, as excellent antibacterial activities were achieved by using the reported method. The developed process can be easily adapted to the existing textile machinery, making it industrially viable to produce fabric’s versatility. 相似文献
13.
The dyeing properties of hydrophobic polypropylene fibers using cationic dyes were investigated to improve dyeability by electron
beam irradiation and sulfonic acid incorporation. The color strength of polypropylene fibers after irradiation was examined
according to the dyeing conditions including the pH of the dyebath, absorbed doses, and the introduction of a functional group
to the fiber substrate. The best dyeing result was obtained when polypropylene fibers incorporated by sulfonic acid group
after electron beam irradiation were dyed with cationic dyes at alkaline conditions and 30∼75 kGy irradiation ranges. 相似文献
14.
Vahid Shakeri Siavashani Peiman Valipour Ezzatollah Haghighat 《Fibers and Polymers》2014,15(4):729-735
In this study, the effect of corona discharge treatment on the physical and mechanical properties of bleached cotton and polyester-cotton fabrics were investigated. For this purpose, the samples were treated by corona discharge at two levels of voltage 5 and 10 kV, and at various duration times of plasma, ca. 1.4, 2.1 and 3.5 min. The corona discharge treatment was applied on the fabric samples before and after bleaching treatment. The results show that the corona influences on the surface morphology, breaking strength, air permeability, abrasion resistance, and pilling of cotton and polyester-cotton fabrics. Moreover, the levels of voltage and duration of plasma have a different effect on the properties of fabrics. 相似文献
15.
An alternative approach to application of chitosan based on layer by layer (LbL) assembled technique is studied in this paper. For this aim, chitosan (CHT) was used as a bio-based cationic polyelectrolyte and pentasodium tripolyphosphate (TPP) and poly(sodium 4-styrene sulfonate) (PSS) were selected as anionic polyelectrolyte. TPP/CHT and PSS/CHT based bilayers were fabricated on the cationized woven cotton fabrics via layer-by-layer self-assembly technique. The characterization of coatings on the fabric surface in terms of surface appearance, atomal content, and chemical bondings were made in detail through SEM, XPS, and FTIR-ATR analysis. Also, the antibacterial activity, air permeability, and water contact angle were measured. Surface analyses demonstrate the interaction between TPP, PSS and chitosan separately. XPS spectra also showed the existence of LbL deposition over cotton substrates in terms of both elemental composition and the presence of different types of bondings on the fabric surface. The antibacterial activity analysis revealed that the modified cotton fabric with the addition of CHT/TPP and CHT/PSS bilayers could increase the degree of inhibition on K. pneumanie and S. aureus bacteria. 相似文献
16.
Shahbazi HR Sadeghi AA Fazaeli H Raisali G Chamani M Shawrang P 《Pakistan journal of biological sciences: PJBS》2008,11(4):676-679
The effect of electron beam irradiation at doses of 100, 200 and 300 kGy on ruminal dry matter degradation kinetics of wheat straw was investigated. Samples were irradiated by electron beam irradiator under identical conditions of temperature and humidity. Nylon bags of untreated or irradiated wheat straw were suspended in the rumen of three Taleshi steers for up to 96 h and resulting data were fitted to non-linear degradation model to calculate degradation parameters of dry matter. Results show that the washout fractions of dry matter increased linearly (p<0.001), but potentially degradable fraction and degradation rate decreased linearly (p<0.001) by electron beam irradiation. As a consequence, the effective degradability of dry matter increased linearly (p<0.001) with increasing irradiation dose. Electron beam irradiation at doses of 100, 200 and 300 kGy increased the effective degradability of dry matter at rumen outflow rate of 0.05/h by about 7, 15 and 18%, respectively. In the condition of this study, electron beam irradiation at dose of 200 kGy appeared to be a suitable dose for improving dry matter degradability of wheat straw in the rumen. 相似文献
17.
To investigate sound characteristics of PU-Nanoweb (NW) and PTFE film (PTFE) laminated vapor permeable water repellent fabrics,
their frictional sounds by walking, jogging, and running speeds were recorded and sound characteristics such as SPL, loudness
(Z), sharpness (Z), roughness (Z), and fluctuation strength (Z) were calculated. Mechanical properties were measured by KES-FB
system. SPL and fluctuation strength (Z) were significantly increased by increasing speed. Roughness (Z) was generated to
be the highest by jogging and running speeds. However, sharpness (Z) was decreased by increasing speeds. NW had significantly
lower SPL, loudness (Z), but had higher roughness (Z) than PTFE. NW significantly had less B (bending rigidity), G (shear
stiffness), WC (compressional energy), and W (weight). These distinctions influenced the sound characteristics to have the
different sound between NW and PTFE. The sound would be low by controlling the mechanical properties and laminated nanoweb
and film conditions. The crucial factors were RC and laminated nanoweb and film weight to minimize SPL and loudness (Z) of
NW and PTFE at all speeds. 相似文献
18.
Surface modification of polyester fabrics by enzyme treatment 总被引:1,自引:0,他引:1
In this study, the effect of enzymatic hydrolysis using lipase and cutinase on poly(ethyleneterephthalate) (PET) fabrics was
investigated in an attempt to improve the hydrophilicity of these fabrics. The hydrolytic activity of the enzymes was expressed
for variations in pH levels, temperatures, enzyme concentrations, and treatment times. The effects of using a nonionic surfactant
were examined by measuring moisture regain and surface wettability. Finally, the fabric characteristics that were affected
by enzyme treatment were evaluated by tensile strength and scanning electron microscopy. The optimal treatment conditions
for lipase were determined to be a pH of 4.2, a temperature of 50 °C, a lipase concentration of 100 %, and a treatment time
of 90 min; those for cutinase were determined to be a pH of 9.0, a temperature of 50 °C, a cutinase concentration of 100 %,
and a treatment time of 60 min. At optimal enzymatic treatment conditions, we got the significant results of increase on the
moisture regain and the water contact angle (WCA) and water absorbency effectively decreased. Triton X-100 facilitated cutinase
hydrolysis on PET fabrics; however, it was ineffective for lipase. With enzymatic treatment, the tensile strength did not
decrease. 相似文献
19.
The surface morphology of the CO2 laser treated grey cotton fabrics was studied which showed a characteristics sponge-like structure on cotton fibres after
treating with CO2 laser irradiation. The laser treatment parameters ranging from 100 to 150 pixel time and 40 to 70 dot per inch (dpi) were
irradiated on the grey cotton fabrics directly and the degree of physical modifications, such as surface morphology, wettability
and fabric strength, were changed accordingly with various laser treatment parameters. The surface morphology, wettability
and tensile strength of cotton fibre treating with laser were evaluated using different instruments, such as Scanning Electron
Microscope (SEM), contact angle meter and tensile strength machine. In spite of creating a sponge-like structure on fibre
surface after treating with laser, the wettability of the samples was highly improved but the tensile strength was decreased. 相似文献
20.
Enhanced electrical conductivity of cotton fabrics coated with polyaniline (PANI) and PANI/carbon coated Fe (Fe@C) and carbon coated Co (Co@C) metal nanoparticles (NPs) composites were investigated. PANI/metal nanoparticle (NP) composites were fabricated with a surface initialized polymerization method and silanization helped with chemical bonding to cotton. The volume resistivity of the samples and structural characterizations were assessed by relevant methods. The results showed that enhanced electrical conductivity, thermal stability and magnetization were obtained via polymeric nanocomposites (PNC) and all these findings revealed that PANI/metal NP PNC coated cotton fabrics would exhibit good level electromagnetic shielding performance as a function of combined electrical conductivity and magnetization which is the objective of our future studies. 相似文献