碱处理对PTT纤维结构性能的影响

研究了碱处理对PTT纤维的结构性能及其表面形态的影响。结果表明:PTT纤维经碱处理后,表面形成明显的坑穴,结晶结构和热性能变化不大,强度有所降低,吸湿性能、染色性能有所提高。当减量率达到16.35%时,其上染率明显提高。研究结果对改善PTT纤维的染色性能及开发PTT纤维混纺或交织物同浴碱处理具有一定的意义。     

碱处理对CDP纤维与PTT/PA6复合纤维混纺织物的影响

以阳离子可染聚酯(CDP)纤维为经纱的主要成分,聚对苯二甲酸丙二醇酯(PTT)/聚已内酰胺( PA6)复合纤维为纬纱,进行混纺获得CDP与PA6混纺织物.用不同碱浓度、温度和时间对混纺织物进行碱处理,考察了碱处理条件对碱减量的影响,研究了碱减量对混纺织物的力学性能、染色性能等的影响.结果表明:混纺织物的碱减量随碱浓度的...     

氟硅橡胶与聚酯织物的粘接

氟硅橡胶和聚酯（PET）织物都属比较难粘的材料，聚酯织物须经水解处理（20％NaOH水溶液，23℃，1h），水解、洗涤、晾干后的聚酯织物表面引入了羟基，能与硅烷水解生成的羟基反应。以乙烯基三乙氧基硅烷作为胶粘剂，可以显著地提高氟硅橡胶与聚酯织物粘接的粘接强度，     

导电聚吡咯／聚酯复合织物研究

采用吡咯气固相沉积聚合法制备导电聚吡咯／聚酯复合织物，研究了处理工艺对聚酯织物结构与性能的影响。结果表明，聚酯织物先经碱减量处理60 min，再经1.0 mol／L氧化剂处理30 min，吡咯单体气固相沉积聚合8次可制得具有较好导电性能的聚吡咯聚酯复合织物，其表面电阻约为330 Ω／cm，其力学性能的降低程度不大，聚吡咯均匀致密地沉积在聚酯织物表面。     

碱处理椰壳纤维织物对环氧树脂基材料拉伸性能影响研究

为研究碱处理椰壳纤维织物对环氧树脂基材料拉伸性能的影响,本文采用氢氧化钠（NaOH）和碳酸氢钠（NaHCO3）两种碱溶液对椰壳纤维织物进行预处理,研究了不同浓度碱溶液和处理时长对椰壳纤维织物表面形貌的影响,并制备了以环氧树脂为基体的椰壳纤维织物。结果表明,经过5%NaOH溶液环境处理6 h和在10%NaHCO3溶液环境处理96～168 h的情况下,对环氧树脂基材料的拉伸性能增强效果表现出一致性,并且达到了最大值。通过对其微观和傅里叶变换红外光谱分析,随着碱处理时长的增加,椰壳纤维表面的轮廓逐渐显现出更清晰的特征,超过适宜处理时间,其表面呈现出更加粗糙的特征,伴随着更为明显的大面积腐蚀现象。纤维在10%NaHCO3溶液环境中处理96～168 h时与5%NaOH溶液处理6 h时表面出现了较为相似的现象,并且NaHCO3溶液不会对纤维表面的纤维素结构造成损伤,也不会显著增加纤维表面的粗糙度。     

碱-等离子体处理涤纶织物的时效性研究

将涤纶织物分别进行30,60,90℃的碱处理后再进行等离子体处理,探讨了碱预处理对等离子体处理效果的时效性的影响;测定处理后纤维的润湿、芯吸和染色等性能以及放置过程中的性能变化,并对纤维的微观形态及其表面化学成分进行了表征。结果表明:经碱-等离子体联合处理后,涤纶织物的润湿、芯吸和染色等性能的提高较经单独等离子体处理更显著,且在放置过程中织物性能的衰减较单独等离子体处理减缓;碱预处理使等离子体处理的时效性得到改善。     

等离子体处理对聚酯织物粘合性能的影响

介绍低温等离子体处理的原理及其对聚酯织物粘合性能的影响。等离子体处理包括等离子体活化上胶法和直接激化法等，通过清洁、刻蚀、交联和表面化学改性的协同作用改善聚酯织物的表面性能，提高聚酯织物的粘合性能。     

表面处理对聚酯膜粘接性能的影响

探讨了聚酯膜的表面进行丙酮清洗表面处理、化学处理和Co60辐照处理,对聚酯膜表面主要元素含量、胶粘剂剥离强度和吸水性的影响。结果表明,丙酮清洗处理后的聚酯膜粘接接头耐久性能低于化学处理,而Co60辐照的聚酯膜粘接接头耐久性能最佳。     

碱处理对抗菌导湿聚酯纤维性能的影响

讨论了使用碱处理方法对抗菌导湿涤纶进行亲水化改性的影响。用保水率和快干性能对纤维的吸湿、导湿性能的变化进行表征,探讨了碱处理对纤维的表面结构、吸水性、导湿性及抗菌性能的影响。结果表明,随着纤维横截面异形度的变化和碱处理浓度的增加,纤维表面产生微孔,纤维的吸湿性和织物的导湿性能都得到改善。     

化纤应用及处理

20045285聚酯的酶改性YoonMeeYoung…;AATCCReview,2002,2(6),p.33(英)用新技术对聚酯织物进行改性,包括已发明的聚酯织物表面酶改性技术。酶和聚酯反应时通过水解酯键打开聚合物链,释放出易溶解的聚合物碎段。在适度的条件下,采用酶处理聚酯的技术改善了聚酯的一些不需要性能,此方法已获得证实。酶处理可消除起球、提高亲水性、增加阳离染料对聚酯的粘合牢度、切削聚酯尺寸、降低纤维的光泽和改善聚酯的去油污性能。(涂君植)     

涤纶-TPU涂层织物界面性能研究进展

涤纶织物表面惰性是制约涤纶-TPU涂层织物复合牢度的重要因素,纤维及织物表面改性是改善涂层与织物界面结合效果的有效措施.在分析涤纶-TPU涂层织物界面结合强度影响因素的基础上,综述了国内外涤纶织物表面改性的研究进展,以及涂层织物研究中常用的研究方法及技术手段.     

玻璃布,芳纶织物与氟橡胶的粘接研究

采用处理剂分别处理玻璃布和芳纶织物表面,比较2者与氟橡胶的粘接性能,发现玻璃布经硅烷偶联剂处理后,强度和伸长率明显下降,脆性增大,与氟橡胶粘合性较差,芳纶表面经不同偶联剂处理后,与氟橡胶的粘合性能变化不大,但经JQ－1处理后剥离强度增大约20％。     

Effect of bio-alkyd resin oil content and viscosity on the adhesion of EPDM to polyester fabric

Three types of bio-alkyd resins varies in their oil content and viscosity were added to EPDM rubber mix loaded by three bonding system consisting of Hexamethylenetetramine, Resorcinol and Hydrated silica (HRH). The mixes were charged by certain amount of thermal carbon black. Rubber dough was spread on polyester sheet fabric. The peel strength was used to measure the adhesion strength. The rubber-proofed fabric subjected to UV irradiation at different period of times. The dielectric constant, volume resistivity, thermal stability, water and air permeability of the various rubber coated fabric were examined. The addition of the bio-alkyd resin improved the various mechanical and physical properties of the rubber coated fabric materials. The suggested mechanism of bio-alkyd resin between EPDM and polyester fabric was also studied.     

氟硅橡胶与聚酯织物的粘接研究

研究了不同偶联剂对氟硅橡胶和聚酯织物粘接性的影响,并对粘接机理进行了探讨。试验结果表明：以乙烯基硅烷偶联剂为重要成分的胶粘剂,解决了氟硅橡胶与聚酯织物的粘接问题,并具备良好的耐燃油性和耐温性。在粘接之前,须对聚酯织物进行水解预处理。     

Chemical resistance,void contents,and morphological properties of Hildegardia fabric/polycarbonate‐toughened epoxy composites

A uniaxial natural fabric of Hildegardia populifolia was used as a reinforcement for a polycarbonate‐toughened epoxy. The Hildegardia fabric was treated with a 5% sodium hydroxide solution for 1 h. The fabric was spray‐coated with a 1% silane‐based coupling agent. The variation of the chemical resistance and void content with different fabric contents and fiber orientations was studied. The morphology of the fractured composites was investigated with scanning electron microscopy (SEM). SEM micrographs indicate that the bonding between the Hildegardia fabric and the matrix was enhanced partially by the alkali treatment. The alkali treatment in the presence of the silane coupling agent gave rise to matrix skin formation on the surface of the fibers, which indicated good bonding between the reinforcement and the matrix. Hildegardia/polycarbonate‐toughened epoxy composites were found to have reasonable chemical and water resistance. The liquid absorption increased when the fabric was treated with an alkali, when the coupling agent was used, and in the presence of water and aqueous solutions. The void content of the composites decreased with increasing fabric content. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

Bonding in fabric-cement systems: Effects of fabrication methods

This paper compares the effects on the bond between fabric and cement matrix of three different processing methods: casting, pultrusion and vacuum condition. The fabrics included bonded glass mesh, woven polyvinylalcohol, and warp knitted weft insertion polypropylene. Pullout tests were performed to examine the bond between fabric and cement matrix. A microstructural analysis was conducted and correlated with pullout data. Improved bonding was obtained for fabric-cement composites produced with the pultrusion process, particularly for fabrics composed of multifilament yarns that have open junction points and no sizing to seal individual yarns. This improved bonding results from the impregnation of the fabric in the cement chamber during the pultrusion process, which filled the spaces between the filaments of the multifilament yarns.     

A study on the thermo-pressing sewing method for prevention of allergen penetration through micropore fabric

Micropore fabrics have been proposed to reduce exposure to house dust mite allergens in the field of environmental management methods. However, there is not an adequate method for verifying allergen impermeability of these micropore fabrics yet. In this study a particle penetration device was developed to test the allergen barrier performance of micropore fabrics against house dust mite allergens. The weight reduction rate of each micropore fabric was measured using the particle penetration device. At the given pressure and 90 seconds, the weight reduction ratio reached 35.6% for 6550 fabric, 13.6% 6560 fabric and 6.8% for 6563 fabric compared to 99.9% of 6060 fabric. In addition, a thermos-pressing sewing method, in which the bonding thread and the stitching portion were pressed using a thermos-pressing device, was proposed. The fabric made by the thermo-pressing sewing method effectively prevented particle penetration compared with the fabric made by the general sewing process.     

Effect of processing conditions on the structure and properties of polypropylene spunbond fabrics

The structure and properties of a spunbond fabric are determined by numerous process variables. The development of fiber morphology is influenced and controlled by extrusion and quenching conditions. The properties of the fabric are the result of the properties of the filaments, their arrangement in the web, and the bonding conditions. It is therefore critical to understand the relationship between the process conditions and the properties of the fabrics produced. This study was conducted to investigate the effects of some of the important process variables on the structure and properties of the filaments and ultimately on that of the fabrics. Process variables such as polymer throughput rate, cooling and suction air speed, web basis weight, and bonding temperature were investigated. Filament samples were collected before bonding and were analyzed for various properties such as crystallinity, crystallite size, birefringence, density, thermomechanical stability, and tensile properties. The fabric samples were analyzed for tensile properties, tear strength, stiffness, and crystallinity. Ruptured strips obtained from the tensile test were observed with a scanning electron microscope to understand the failure mechanism. The results were statistically analyzed to evaluate the effect of process variables on the properties and to predict the properties for different process conditions. The findings are helpful in determining the optimum processing conditions so as to achieve the desired properties. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 2355–2364, 2005     

Effect of carbon fabric type on the mechanical performance of 2D carbon/carbon composites

A stabilized PAN fabric was carbonized and graphitized from 800°C to 2500°C. Two-dimensional (2D) carbon/carbon composites were made using the stabilized PAN fabric, carbonized fabrics, and a resol-type phenol-formaldehyde resin. These composites were heat-treated from 600°C to 2500°C. The influence of different heat-treated fabrics and heat treatment on the fracture and flexural strength of these composites was also studied. The composite reinforced with higher heat-treated fabrics showed a lower weight loss than that with lower heat-treated fabrics. When the composites were graphitized at 2500°C, the loss was 49.7 wt% for the composite made with stabilized PAN fabric and 26 wt% for that with carbonized fabric at 2500°C. Those composites also have a higher density than composites produced by other methods. Composites made with stabilized PAN fabric exhibited a strong bonding in the fiber/matrix during pyrolysis. This composite showed catastrophic fracture and a smooth fracture surface with no fiber pullout. Composites made with higher carbonized fabrics exhibited a weak interface bonding. These composites showed a pseudo-plastic fracture pattern with fiber pullout during pyrolysis. Composites made with carbonized fabrics at 2000°C and 2500°C showed the highest flexural strength at the prolysis temperature of 1000°C. Composites made with carbonized fabric at 1300°C showed the highest flexural strength above 1500°C to 2500°C. The composite made with stabilized PAN fabric exhibited the lowest flexural strength during pyrolysis.     

Use of an aliphatic hydrocarbon to improve adhesion in butyl rubber-proofed polyester fabric

An aliphatic hydrocarbon resin (Escoraze) was used as an additive in four bonding systems. These systems were based on (i) resorcinol, (ii) o-aminophenol, (iii) m-aminophenol, and (iv) m-phenylene diamine. Escoraze caused a significant additional adhesion force between the butyl rubber and the polyester fabric. The rubber-proofed fabric was subjected to an ionizing radiation. This led to better adhesion properties of the product. The permeability, the dielectric constant, and the electrical resistivity of the rubber-proofed fabric were measured.