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苧麻横截面形态随其细度变化函数关系的研究 被引量:1
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作者 王卫华 董建华 田宇晨 《现代商检科技》 1997年第6期38-40,共3页
关键词 苎麻 横截面形态 细度变化 函数
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PP/PA6中空橘瓣型复合超细纤维的制备及性能研究 被引量:6
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作者 赵德方 毛加冲 +6 位作者 黄芽 郭薇薇 奚清瑶 李献梅 蔡意 任天翔 占海华 《丝绸》 CAS CSCD 北大核心 2022年第6期44-49,共6页
随着锂离子电池的不断推广与应用,对电池隔膜提出了更薄、更密的要求,对其制备原料的纤维直径提出了更高的技术要求。然而,目前中国产的超细纤维难以满足单丝线密度≤0.5 dtex的要求。本文将聚丙烯(PP)和聚酰胺(PA6)进行双组分复合纺丝... 随着锂离子电池的不断推广与应用,对电池隔膜提出了更薄、更密的要求,对其制备原料的纤维直径提出了更高的技术要求。然而,目前中国产的超细纤维难以满足单丝线密度≤0.5 dtex的要求。本文将聚丙烯(PP)和聚酰胺(PA6)进行双组分复合纺丝,通过在显微镜下观察纺流丝的横截面形态,确定纺丝组件及原料组分比例;在此基础上,通过优选工艺条件,确定纺丝温度、牵伸倍数、纺丝速度;同时对纤维的线密度、拉伸性能和取向度进行了测试分析研究。结果表明:当采用PP与PA6进行中空橘瓣型复合纺丝时,PP螺杆挤出机各区温度为225℃/225℃/230℃/230℃、PA6螺杆挤出机各区温度为270℃/270℃/275℃/275℃、PP纺丝副箱体温度为230℃、PA6纺丝副箱体为275℃、纺丝主箱体温度为270℃、PA6与PP的质量比为40︰60、纺丝速度为2800 m/min、牵伸倍数为3.0时,纤维的可纺性、拉伸性能及取向良好。制备的中空橘瓣型复合超细纤维满足了锂离子电池隔膜用超细纤维直径的要求。 展开更多
关键词 聚丙烯 聚酰胺 中空橘瓣型复合超细纤维 横截面形态 可纺性 加工工艺条件
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羽毛蛋白粘胶长丝的研制试验 被引量:2
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作者 田文智 《人造纤维》 2019年第1期7-12,共6页
介绍了羽毛蛋白液基本情况、蛋白丝纺制工艺,对蛋白胶过滤性能与物化指标、蛋白丝可纺性、脱硫处理、横截面形态、物理指标等进行了试验分析。研制试验结果表明:将羽毛蛋白液与粘胶共混,采用纺前注入与半连续纺丝技术可以纺制出羽毛蛋... 介绍了羽毛蛋白液基本情况、蛋白丝纺制工艺,对蛋白胶过滤性能与物化指标、蛋白丝可纺性、脱硫处理、横截面形态、物理指标等进行了试验分析。研制试验结果表明:将羽毛蛋白液与粘胶共混,采用纺前注入与半连续纺丝技术可以纺制出羽毛蛋白粘胶长丝,成品丝强伸指标能达到GB/13758-2008《粘胶长丝》优等品水平。 展开更多
关键词 羽毛蛋白液 粘胶长丝 蛋白胶 纺丝可纺性 横截面形态
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连续纺粘胶长丝酸浴以硫酸铝替代硫酸锌小试试验
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作者 魏全东 范丙义 牛经敏 《人造纤维》 2017年第6期14-16,共3页
基于现有连续纺粘胶长丝生产线,自制凝固浴循环调配系统,进行连续纺粘胶长丝酸浴以硫酸铝替代硫酸锌探索性纺丝试验。试验结果表明:酸浴以硫酸铝替代硫酸锌纺制连续纺粘胶长丝,纺丝过程顺利,可纺性稳定,小试成品丝物化指标达到FZ/T54011... 基于现有连续纺粘胶长丝生产线,自制凝固浴循环调配系统,进行连续纺粘胶长丝酸浴以硫酸铝替代硫酸锌探索性纺丝试验。试验结果表明:酸浴以硫酸铝替代硫酸锌纺制连续纺粘胶长丝,纺丝过程顺利,可纺性稳定,小试成品丝物化指标达到FZ/T54011-2014《连续纺粘胶长丝》一等品水平。 展开更多
关键词 硫酸铝 硫酸锌 酸浴 物化指标 横截面形态
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Morphological effects of autoclaved diet on the myenteric neurons of rats
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作者 Patrícia O Gonalez Naianne K Clebis +5 位作者 Renata B Mari Karina M Gagliardo Sandra R Stabille Haroldo G Faria Edson A Liberti JoséRoberto Kfoury Jr 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第43期4799-4803,共5页
AIM:To evaluate the effect of autoclaved diet on the jejunum neurons of the myenteric plexus of rats during their growth.METHODS:The experimental groups were made up of rats going through weaning whose mothers receive... AIM:To evaluate the effect of autoclaved diet on the jejunum neurons of the myenteric plexus of rats during their growth.METHODS:The experimental groups were made up of rats going through weaning whose mothers received either an autoclaved or a non-autoclaved diet during gestation and lactation,and rats that were fed the same diet as their mothers during the post-weaning period.In order to measure the neurons'body profile and to quantify the number of neurons per area,preparations were stained by the nicotinamide adenine dinucleotide-diaphorase method.RESULTS:No significant changes were observed in rats'body weight or in the number of neurons regardless of the diet used(P>0.05) .There was a decrease in the jejunum-ileum length in rats treated with an autoclaved diet(P<0.05) .An increase in the neuronal cross-sectional area was seen in rats that had received the autoclaved diet,an effect that was significant for animals undergoing weaning.In addition,all observed factors showed significant differences when related to the age of the animals.CONCLUSION:The autoclaved diet did not alter the quantity of neurons,but increased their cell body area,suggesting changes similar to those observed in protein deficiency. 展开更多
关键词 Myenteric neurons Jejunum Morphometry Diet Autoclaving
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Elastic Collisions Between two Ground-State P and D Atoms at Low and Ultralow Temperatures
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作者 施德恒 张金平 +3 位作者 孙金锋 马恒 刘玉芳 朱遵略 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第2期331-338,共8页
The PD(X^3∑^-) interaction potential is constructed using the CCSD(T) theory and the basis set, augcc-pV5Z. Using this potential, the spectroscopic parameters are accurately determined. The present Do, De, Re, ω... The PD(X^3∑^-) interaction potential is constructed using the CCSD(T) theory and the basis set, augcc-pV5Z. Using this potential, the spectroscopic parameters are accurately determined. The present Do, De, Re, ωe, ωeχe, αe, and Be are of 3.056 99 eV, 3.161 75 eV, 0.142 39 nm, 1701.558 cm^-1, 23.6583 cm^-1, 0.085 99 cm^-1, and 4.3963 cm^-1, respectively, which almost perfectly conform with the measurements. A total of 26 vibrational states is predicted when J = 0 by solving the radial Sehrodinger equation of nuclear motion. The complete vibrational levels, classical turning points, initial rotation and centrifugal distortion constants when J = 0 are reported for the first time, which favorably agree with the experiments. The total and various partial-wave cross sections are calculated for the elastic impact between two ground-state P and D atoms at 1.0 × 10^-12 - 1.0 × 10^-4 a.u. when they approach each other along the PD(X^3∑^-) potential. No shape resonances exist in the total elastic cross sections, though the peaks can be found for each partial wave until l=6. The shape of the total elastic cross sections is dominated by the s partial wave at very low temperatures. Due to the weakness of the shape resonances of each partial wave, they are all passed into oblivion by the strong total elastic cross sections. 展开更多
关键词 elastic scattering total cross section shape resonance molecular constant
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