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为了研究苎麻单纤维断裂强力的全貌与分布规律,通过采用等速伸长法测得其断裂强力,根据断裂强力的频数直方图的分布趋势,用正态分布的偏度、峰度等参数对其进行分析,用Q-Q图与Kolmogorov-Smirnov（以下简称K-S）检验法检验苎麻单纤维强力的正态性,总体上服从正态分布规律,但有一定偏差,不对称,为右偏尖峰态。同时提出了建立在统计基础上的苎麻单纤维断裂强力指标体系,即运用主体断裂强力、品质断裂强力、平均断裂强力、弱强纤维断裂强力和超强纤维强断裂力五个指标来表征单纤维断裂强力。 相似文献
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运用光学显微镜来观察分析麻、竹类纤维的纵、横截面形态,以此为基础比较麻、竹类纤维结构、形态的不同.并利用自制的单纤维轴向压缩弯曲测量仪测试了苎麻、亚麻、黄麻、红麻、竹和竹浆纤维的临界刺扎力 Pcr,计算抗弯刚度和等效弯曲模量,由此得到纤维刺痒特征的对比和定量表达. 相似文献
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运用光学显微镜来观察分析麻、竹类纤维的纵、横截面形态,以此为基础比较麻、竹类纤维结构、形态的不同。并利用自制的单纤维轴向压缩弯曲测量仪测试了苎麻、亚麻、黄麻、红麻、竹和竹浆纤维的临界剌扎力Pcr,计算抗弯刚度和等效弯曲模量,由此得到纤维剌痒特征的对比和定量表达。 相似文献
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苎麻品种纤维形态结构与产量、品质相关性的研究 总被引：2，自引：0，他引：2
我们结合苎麻育种实践，在苎麻品种资源圃中选择部分品种，于纤维成熟期取样，用万能固定液固定，甘油一酒精法软化．进行徒手切片观察；并将各品种原麻经化学脱皎后，测定单纤维支数和强力，研究了不同苎麻品种的纤维形态结构与产量，品质的相关性。 相似文献
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本文通过对西北内陆棉区南疆亚区和北疆亚区１７个区试品种（系），１４个主要经济性状的变异分析表明，目前，无论是南疆还是北疆，高产优质育种的突破性性状选择都应在稳定铃数并保持单株结铃８个左右的基础上，重视铃重的选择。其次北疆亚区还要重视衣指、子指、吐絮快而集中性状的选择，品质改良以提高单纤维强力和纤维成熟度为主要选择性状；南疆亚区也要重视子指、衣指、吐絮快而集中性状选择，品质改良以提高单纤维强力和麦克隆值为主要选择性状。 相似文献
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本文介绍了贴身穿着某些织物时引起的刺痒感以及其他皮肤反应的机理，分析了苎麻织物引起的刺痒感的影响因素，对几种减轻苎麻织物刺痒感的方法进行了讨论，并总结出了几个有关结论。 相似文献
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以纯苎麻纱和细旦涤纶为原料编织麻盖涤双面针织物;用亲水性硅油、水性聚氨酯、纤维素酶等进行吸湿快干、柔软以及消除刺痒感的整理。结果表明:麻盖涤针织面料的吸湿快干性能比棉盖涤好,通过应用合适的整理剂和整理工艺能有效地解决麻盖涤针织物手感和刺痒感问题。本文还对纯苎麻纱针织织造中断纱爆孔问题提出了解决的措施。 相似文献
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The goal of this study is to establish a link between fabric fiber features responsible for prickle and peripheral nervous
responses. According to the anatomical mapping of nociceptors and their physiological property, a neuromechanical model coupling
fiber-skin-nociceptor property is developed to stimulate the process of coarse fibers prickling human forearm skin. This model
focuses on the content of coarse edge of fiber ends protruding from fabric surfaces, and the spatial distribution of these
fibers is random. For fiber ends, their diameter and length are assumed to be normally distributed. By systematically changing
the fibers ends per unit fabric surface area, or the distribution of their diameter or their length, we turn to three variables
to measure the resulting neural activity of nociceptors. The results firstly confirmed the highly correction between firing
rates of nociceptors and density of coarse fiber ends. Meanwhile, the firing rates of populations of nociceptors fluctuate
with the density of fiber ends, as implies the probability of coarse fibers triggering nociceptors. Furthermore, the summation
of firing rates over active nociceptors changes with the features of fiber ends in a power law, and closely correlates the
subjective estimate. In theory, therefore, the firing rates of populations of Aδ nociceptors at periphery encode fiber-ends
features responsible for prickle sensation by the spatial and probability integration. 相似文献
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Fully biodegradable and environment-friendly green composite specimens were made using ramie fibers and soy protein concentrate
(SPC) resin. SPC was used as continuous phase resin in green composites. The SPC resin was plasticized with glycerin. Precuring
and curing processes for the resin were optimized to obtain required mechanical properties. Unidirectional green composites
were prepared by combining 65 % (on weight basis) ramie fibers and SPC resin. The tensile strength and Young’s modulus of
these composites were significantly higher compared to those of pure SPC resin. Tensile and flexural properties of the composite
in the longitudinal direction were moderate and found to be significantly higher than those of three common wood varieties.
In the transverse direction, however, their properties were comparable with those of wood specimens. Scanning electron microscope
(SEM) micrographs of the tensile fracture surfaces of the green composite indicated good interfacial bonding between ramie
fibers and SPC resin. Theoretical values for tensile strength and Young’s modulus, calculated using simple rule of mixture
were higher than the experimentally obtained values. The main reasons for this discrepancy are loss of fiber alignment, voids
and fiber compression due to resin shrinking during curing. 相似文献
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In effort to improve the soft properties of ramie fiber, we synthesized a carboxylate-containing polymer for use as a modifying agent, and successfully modified the ramie fiber in a strong base with the carboxylate-containing polymer. We applied Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) to investigate the structures of the raw and modified ramie fibers, and further investigated the mechanical and dyeing properties of the raw and modified ramie fibers. The results showed that the surface of the ramie fiber underwent significant changes due to the grafting reaction of the carboxylate-containing polymer and fiber. After the chemical modification, the flexural strength and initial modulus of the modified ramie fiber decreased while tensile strength increased, indicating that the softness of the modified ramie fiber increased though its tensile resistance remained high. In addition, the fixation of reactive dyes on the modified ramie fiber was larger than that of the reactive dyes on the raw ramie fiber. Our observations of mechanical properties and dye fixation indicated that the carboxylate-containing polymer is an effective and efficient soft modifier. 相似文献
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In the present paper, ramie fiber reinforced polymer (RFRP) plates prepared by hot compression process were subjected to water immersion at 20 oC and 40 oC for four weeks, and the variation of water uptake and mechanical properties with immersion time were investigated. It was found that the saturated water content and the coefficient of diffusion in RFRP were much higher than those in synthetic fiber based composites, due to the strong hydrophilic characteristic of the ramie fiber. After fully drying of the immersed samples, mass loss from 1.6 % to 3.6 % was found, indicating occurrence of a serious hydrolysis of the resin and the ramie fibers. After a short term of immersion (i.e., 1 day), RFRP showed a remarkable deterioration in the flexural and short beam shear properties. Further increase of the immersion time, the degradation rate of the mechanical properties was much reduced. After fully drying, the mechanical properties of the samples can be recovered to some extent, but still much less than the original values. The variation of mechanical property as a function of the water uptake content exhibits three stages (i.e., dramatic reduction, leveling off and quick decrease again). This may be due to the sequent occurrence of the degradation of natural fibers, fiber debonding and hydrolysis of the fiber and resin during immersion. 相似文献
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苎麻／黄（红）麻织物服用性能测试分析 总被引：1，自引：0，他引：1
本文通过实验测定了苎麻/黄(红)麻混纺交织织物的服用性能，并与苎麻织物的服用性能进行比较，结论表明苎麻/黄(红)麻混纺交织织物具有良好的服用性能。 相似文献
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Fiber-reinforced plastic (FRP) is composed of reinforced fibers and matrix resin, and has high specific strength and low-density materials. Because of the orientation of the fibers within them, FRPs are prone to buckling damage when under compression along the axial direction of the fiber, especially flexible organic ones. The compressive performance of FRP is largely dependent on fiber properties. the buckling load of FRP will increase with the increasing of fiber’s. In this study, we developed a way to improve the compressive and bending strength of ultra-high molecular weight polyethylene (UHMWPE) fibers. Carbon nanotubes (CNTs) and vapor-grown carbon fibers (VGCFs) were coated on the surface of UHMWPE fibers by pyrrole vapor deposition. The transverse compressive strength and bending strength of single UHMWPE fibers were determined by microcompression and single fiber bending measurements, respectively. The experiment result showed that coating UHMWPE fibers with CNTs and VGCFs increased both their transverse compressive strength and bending strength. It is excepted that the improved fiber would applied in FRP for better compressive performance. 相似文献
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黄麻／棉织物服用性能探讨 总被引：3，自引：1，他引：3
本文通过试验测定了黄麻／棉织物的服用性能，并与苎麻／棉，涤／棉，纯棉等织物的服用性能进行比较，结论表明黄麻／棉织物作为服用织物是可行的。 相似文献