A novel multifunctional cotton fabric using ZrO2 NPs/urea/CTAB/MA/SHP: introducing flame retardant,photoactive and antibacterial properties

This study was aimed to investigate the possibility of producing multifunctional properties on cotton fabric using ZrO₂ nanoparticles along with cetyltrimethylammonium bromide (CTAB) and urea. Maleic acid was also used as a cross-linking agent in the presence of sodium hypophosphite as the catalyst to stabilize fabric from creasing and nanoparticles on the fabric surface. The flame retardant properties of the treated samples were examined using char length and thermogravimetry analysis. The self-cleaning properties of treated cotton fabrics were also analyzed based on the discoloration of methylene blue under sunlight irradiation. The antibacterial activities of treated fabrics were examined against Escherichia coli through counting method. The surface of the treated cotton and microstructure of nanoparticles were characterized by scanning electron microscopy and transmission electron microscopy. Introducing urea as a nitrogen source enhanced both the flame retardant and photoactivity of the nano-ZrO₂-treated fabric. Moreover, incorporating CTAB in the finishing formulation exhibited the satisfactory antibacterial properties on the treated fabrics.     

棉织物的Ag/TiO2复合溶胶抗菌整理

制备了含Ag／TiO2的复合溶胶，并将其用于纺织品的抗菌整理；探讨了表面活性剂浓度、电解质浓度、pH值和温度对溶胶粒径的影响，并用透射电子显微镜（TEM）观察胶粒的形态；测定了水洗10次后整理织物上的Ag和TiO2的含量、织物抗菌效率的变化及其它性能，并采用X射线衍射（XRD）观察TiO2的晶型及Ag的价态。结果表明，采用含Ag和TiO2的纳米溶胶对织物进行抗菌整理后，抗菌效率可达99．9％，织物的抗紫外性能也有所提高，耐洗性较好，且对白度、断裂强力等性能影响不大。     

Preparation and characterization of ZnO/AGE MNPs with aloe gel extract and its application on linen fabric

The main objective of this study was to synthesize Zinc oxide (ZnO) micro/nano-composites with the natural capping agent: aloe gel extract (AGE) instead of traditional chemical capping agent. Therefore, the prepared process is environmentally friendly. Firstly, the AGE was prepared with water extraction, and then samples with AGE (ZnO/AGE MNPs) and without (ZnO) were synthesized under alkaline conditions. The two samples were characterized by UV–visible spectroscopy, Fourier Transform Infrared Spectroscopy, scanning electron microscope, energy dispersive X-ray spectrometer, and X-ray diffraction. Results showed that ZnO/AGE MNPs with smaller particle size were homogeneous and spherical shape crystal and assigned to the ZnO phase (JCPDS 21-1486). Secondly, Linen fabric was treated with ZnO/AGE MNPs, and power of the ultrasonic on UV resistance of linen fabric was investigated. The more advantageous UV resistance property of linen fabric was obtained by ultrasonic treating 30 min at 40 °C under 90 W with 0.8% ZnO/AGE MNPs. The SEM illustrated that there were many micro-nanoparticles on the treated linen fabric surface comparing with the smooth surface of the untreated. After being washed for 20 times, the treated linen fabric was still UV resistance which demonstrated the way preparing ZnO MNPs with AGE.     

阻燃抗菌棉织物的制备及其性能表征

为赋予织物多功能性,解决纳米材料在织物表面的分散均匀性问题,采用植酸与三聚氰胺制备植酸铵盐,赋予织物阻燃性能。在此基础上,阻燃织物表面原位生长纳米银,制备阻燃抗菌多功能纺织品。通过正交试验分析方法对织物阻燃整理和抗菌整理工艺进行优化,并通过红外光谱、扫描电镜、能谱、热重分析等技术手段对织物进行表征。研究结果表明:织物经植酸铵盐二浸二轧整理后,其极限氧指数可达35%以上,其耐水洗性能提高;对大肠杆菌和金黄色葡萄球菌有良好的抑菌作用;整理织物表面粗糙,含有P、N、Ag等元素,织物表面成功接枝植酸铵盐和Ag纳米颗粒,且分布均匀;植酸铵盐和植酸铵盐-Ag对织物表面形成炭层有一定影响,其燃烧后的炭渣量比未整理织物增加了27%。     

Heat resistance investigation and mechanical properties of fabric coated with Al2O3 sol–gel

The Inflatable Reentry and Descent Vehicle is a new kind of ballistic atmospheric entry vehicle which generates a piece of large aerodynamic drag area for deceleration when the resistance cone is deployed by gas-filling expansion. However, the aerothermal heating during planetary entry poses a significant challenge to a flexible fabric. In this paper, the para-aramid fabrics with three different sol–gel coatings (i.e. Al₂O₃ sol coating, supercritical drying Al₂O₃ aerogel coating, and atmospheric pressure drying Al₂O₃ xerogel coating) were proposed for heat resistance analysis and strength analysis. The thermal and mechanical properties of flexible fabric materials were conducted by infrared spectrum analysis, thermogravimetric analysis, scanning electron microscopy analysis, 50s ablation and uniaxial tension testing. All the results indicate that fabric coated with the supercritical drying Al₂O₃ aerogel possesses high heat resistance and nearly 100% residues strengthen.     

纳米TiO2抗菌棉织物服用性能探讨

为探讨纳米抗菌棉织物的服用性能,利用FAST系统测试纳米TiO2整理前后棉织物在低负荷条件下压缩、弯曲、剪切、延伸等力学性能以及相关结构参数和尺寸稳定性.实验结果表明,整理后面密度、纬密、表面厚度、弯曲、可成型性、纬向剪切和纬向松弛收缩率有不同程度的提高;而与经向成45°的剪切刚度、经向松弛收缩率和湿膨胀率有所下降.从...     

The high performances of SiO2-coated melt-blown non-woven fabric for lithium-ion battery separator

This paper reports a kind of composite separator which is prepared by adopting polypropylene melt-blown non-woven fabric as base material, and coating nano-SiO₂ particles on its unilateral side. This paper also observes the morphology of separators and character the pore size, thermal stability, and electrochemical performance of separators. Results show that: filling nano-SiO₂ particles into polypropylene melt-blown non-woven fabric could improve the thermal stability, ionic conductivity, and pore size distribution of polypropylene melt-blown non-woven fabric, especially, the C-rate performance. When the coating solution reaches 15 wt.%, the c-rate performance of separator reaches a higher value of 152 mAh.g^?1 at 0.2 C and 89 mAh.g^?1 at 5 C, which was more excellent than c-rate performance of other composite separators and pp membrane. Such kind of designing used new preparation process and will to be a promising separator for power lithium-ion battery.     

纳米银整理棉织物的制备及其抗菌性能

利用柠檬酸三钠和硝酸银溶液制备纳米Ag整理棉织物,通过X射线衍射仪、扫描电镜和X射线光电子能谱仪对纳米Ag整理棉织物进行表征。考察了柠檬酸三钠与硝酸银物质的量比、温度及浸泡时间对棉织物中Ag质量分数及棉织物抗菌性能的影响。结果表明,棉织物中Ag质量分数和棉织物抗菌性能随着柠檬酸三钠与硝酸银物质的量比的增大先增大后减小,随温度的升高及浸泡时间的延长而增大。当柠檬酸三钠与硝酸银物质的量比为5、温度为80℃、浸泡时间为60 min时,抗菌棉织物对革兰氏阴性菌和革兰氏阳性菌的抑菌圈直径分别达到2.7、2.3 mm。洗涤5次后,纳米Ag整理棉织物仍具有较好的抗菌活性。     

Study on the properties of woolen fabric treated with chitosan/TiO2 sol

In order to improve the color yield and color fastness to light, woolen fabrics were treated with chitosan and TiO₂ sol at first, and then dyed using C.I. Acid Blue 7 dye. The woolen fabric samples before and after treatment were investigated by means of scanning electron microscope and energy dispersive spectroscopy, thermal analysis, and Fourier transform infrared spectroscopy. The reflectance spectrum, color yield K/S value and color fastness to light were also measured. The results show that compared with the untreated woolen fabric, the thermal stability of woolen fabric treated with chitosan/TiO₂ sol is improved. The protection against ultraviolet radiation, color yield K/S value, and color fastness to light are also improved.     

载铜离子抗菌剂的制备及其络合棉织物的性能

针对不同载铜离子整理剂影响棉织物抗菌性能 和其他使用性能的问题,通过采用不同物质的量比的NaOH和CuSO4的溶液,分别制备了三种类型的不同浓度的铜离子抗菌整理剂。然后采用这三种整理剂,以铜离子浓度分别为0.025M、0.05M、0.075M、0.1M、0.15M、0.2M、0.4M,浴比为1：30,时间为20min的条件,分别络合整理棉织物。最后采用K/S法、条样法、半定量琼脂平皿扩散法表征经过不同铜离子浓度络合的棉织物的匀染性、断裂强力以及抗菌抑菌性。结果表明：与其它两种铜氨制备方案相比,当n(NaOH)：n(CuSO4)=1:1时制备的铜氨溶液络合的棉织物络合能力高匀染性好,断裂强力波动及损伤最小、抑菌带宽度最宽。     

Development of multifunctional cotton fabric using atmospheric pressure plasma and nano-finishing

The possibility of using atmospheric pressure dielectric barrier discharge plasma treatment for textile surface activation to facilitate deposition of nano TiO₂/SiO₂ onto cotton fabric is investigated. It is aimed to develop a multifunctional cotton textile using plasma and nanotechnology. The treated fabric is evaluated through measuring the ultraviolet protection factor, antimicrobial activity, and flame retardancy as functional finishes. Surface morphology (Scanning electron microscopy, SEM), thermogravimetric analysis, and mechanical properties were also studied. SEM shows deposition of nanoparticles onto the fabric. He–O₂ plasma pretreatment improves the flame retardancy, antibacterial activity, and thermal stability of the samples were compared with the untreated samples.     

防电磁辐射聚吡咯/ 棉织物的制备及其性能

为获得具备吸波特性的防电磁辐射织物,采用液相化学氧化法制备聚吡咯/棉高分子涂覆类织物,借助法兰同轴法测试织物电磁屏蔽效能,运用KES织物风格仪分析织物物理力学性能,在综合考察制备工艺对织物电磁屏蔽效能的影响以及织物经吡咯处理后的风格变化的基础上,获得最优制备工艺参数。同时,分析了织物电导率、厚度、电磁波频率以及表面孔洞面积对聚吡咯/棉复合织物电磁屏蔽效能的影响。在此基础上,建立了聚吡咯/棉复合织物及表面具有孔洞的复合织物的电磁屏蔽效能预测模型。结果表明：随着织物电导率、厚度的增加,屏蔽效能随之增加;随着电磁波频率的增加,电磁屏蔽效能呈现下降趋势;孔洞大小对电磁屏蔽效能影响显著。     

棉织物的TiO2/ZnO及掺Ag+水溶胶抗紫外整理

采用溶胶-凝胶技术制备TiO2／ZnO及掺银水溶胶，通过浸轧、烘干、焙烘等工序整理到织物上，测试了TiO2与ZnO溶胶的复合比例、浓度及掺银量对织物紫外屏蔽性能的影响。试验结果表明，分别采用TiO2：ZnO为3：7、5：5、7：3的水溶胶整理织物后，在297nm处的紫外线透过率分别为1．99％、0．83％、0．90％；最适宜的溶胶浓度为0．2～0．4mol／L，Ag^＋的掺入对UVB波段的紫外屏蔽性能基本无影响，但可以明显降低UVA波段的紫外线透过率，掺Ag^＋量为0．7％时较经济。     

天然栀子黄染色棉织物的防紫外和抗菌性能

利用天然栀子黄对壳聚糖改性棉织物进行染色,研究了时间、栀子黄用量、pH和温度对染色棉织物K/S值的影响,并研究了栀子黄染色壳聚糖改性棉织物的色牢度、防紫外和抗菌性能.结果 表明壳聚糖改性实现了棉织物纤维的阳离子化;栀子黄染色壳聚糖改性棉织物的优化工艺:栀子黄用量8％,pH 5,60 min,40℃;栀子黄染色壳聚糖改性...     

茶多酚对棉织物的吸附及其抗菌消臭效果

为开发植物多酚保健功能纺织品,通过单因素分析法,探讨pH值、温度、处理时间对茶多酚在棉织物上吸尽率的影响;对棉织物进行阳离子改性,分析改性剂浓度、碱剂用量、改性温度和改性时间对吸尽率的影响;测试茶多酚整理后棉织物的抗菌消臭性能。结果表明：茶多酚对棉织物的浸渍优化工艺为茶多酚6%（o． w．f）,温度40℃,时间60min,浴比1：30,应用此工艺,茶多酚对棉织物的吸尽率为14.6%;棉织物的阳离子改性优化工艺为：改性剂质量浓度25 g/L,碱剂质量浓度6 g/L,温度70°C,时间90 min,浴比1：30,茶多酚应用此改性工艺处理的棉织物的吸尽率为48.8%。经阳离子改性和茶多酚二步法处理后,棉织物的抑菌率（金黄色葡萄球菌）和消（氨）臭率分别为92.2% 和90%,再经铜后媒处理,棉织物的抑菌率（金黄色葡萄球菌）和消（氨）臭率分别达100% 和99.9%。     

聚乙烯醇改性无纺布抗菌复合膜的制备及其性能研究

探究聚乙烯醇改性无纺布抗菌复合膜的制备方法及其性能。用溶液共混法将聚乙烯醇母液分别与不同抗菌剂进行共混,制得聚乙烯醇抗菌母液,再用表面涂覆法将抗菌母液涂布到无纺布表面,干燥后成膜,并对抗菌复合膜的各项性能进行检测。结果表明:脱氢乙酸钠-聚乙烯醇/无纺布抗菌复合膜(SD-PVA/NWF)的吸水性能、抗拉强度及光学性能均优于山梨酸钾-聚乙烯醇/无纺布抗菌复合膜(PS-PVA/NWF)和苯甲酸钠-聚乙烯醇/无纺布抗菌复合膜(SB-PVA/NWF);添加剂的种类不同,复合膜的热封温度不同;抗菌剂的加入降低了复合膜的热稳定性;相比于PS-PVA/NWF和SB-PVA/NWF,相同添加量的SD-PVA/NWF抗菌复合膜的抗菌性能最佳。     

二氧化锰/石墨烯/棉织物复合电极的制备及其电化学性能

为研究并增强柔性织物电极的电化学性能,采用改进Hummers法制备得到高浓度氧化石墨烯水溶胶,并通过干涂层法将氧化石墨烯涂覆于棉织物表面,经化学-微波两步还原法还原氧化石墨烯,制备了石墨烯/棉织物。进一步采用电化学沉积法将二氧化锰沉积在石墨烯/棉织物上,得到二氧化锰/石墨烯/棉织物复合电极材料。借助扫描电子显微镜、X射线衍射仪和红外光谱仪对复合电极材料的形貌和结构进行表征。研究结果表明:复合电极材料在0.25 A/g的电流密度下比电容达到490 F/g,1 000次电容放电后电容保持在95.5%,能量密度达到17.01 W·h /kg。     

Preparation of a hydrophobic recycled jute-based nonwoven using a titanium dioxide/stearic acid coating

This work aims at developing a hydrophobic treatment for jute fiber-based nonwovens. Three solutions of titanium dioxide (TiO₂) nanoparticles were prepared through a sol–gel method by varying the molar ratio of the various constituents. The nonwoven was pretreated with these solutions before being impregnated with different concentrations of stearic acid. The TiO₂ nanoparticles synthesized are amorphous; their size varies with the concentration of ethanol used as a solvent in the sol–gel method. The nanoparticle coating produced on the jute fibers is uniform. The nonwoven wettability was evaluated by measuring its water contact angle and retention time; the nonwoven became hydrophobic at the lowest fatty acid concentration tested. An increase in the stability of the hydrophobicity was observed when the TiO₂ nanoparticle pretreatment was used compared to the application of the stearic acid treatment only. No detrimental effect of the hydrophobic treatment on the nonwoven mechanical performance and thermal stability was observed. These results demonstrate the potential of the TiO₂ nanoparticle/stearic acid treatment as a fast method to provide a stable hydrophobicity to recycled jute-based nonwovens.     

Preparation,characterization, and functional analysis of zinc oxide nanoparticle-coated cotton fabric for antibacterial efficacy

Nanotechnology is an emerging interdisciplinary technology and nanostructures capable of enhancing the physical properties of conventional textiles in areas such as antimicrobial properties, water repellence, soil resistance, antistatic, anti-infrared and flame-retardant properties, dye ability, color fastness, and strength of textile materials. The studies were carried out in order to fine tune the preparation of zinc oxide nanoparticles (NPs) for special applications. Soluble starch (stabilizing agent), zinc nitrate and sodium hydroxide (precursors) were used for the preparation of zinc oxide NPs by wet chemical method. The synthesized NPs were coated on cotton fabric (plain weave), and the antibacterial property of the treated fabric was analyzed. Fourier transform infrared spectroscopic analysis, scanning electron microscopy, and physical and chemical characterization were employed to determine the phase and morphology of the final nanoparticle-coated fabric. The results indicated that 2% zinc oxide nanoparticle (200 nm) -coated fabric have high antibacterial efficiency (99.9% against Staphylococcus aureus and 80% against Escherichia coli) and upon washing the coated fabric (five hand washes), the antibacterial activity was found to be 98% against S. aureus and 75% against Escherichia coli.