As the global textile industry has accelerated its transition to a circular economy,iterative innovation in regenerated cellulose fibers has become a key industry focus.With viscose fiber having been industrialized fo...As the global textile industry has accelerated its transition to a circular economy,iterative innovation in regenerated cellulose fibers has become a key industry focus.With viscose fiber having been industrialized for over a century and lyocell fiber gaining market recognition because of its environmentally friendly process,which is the next regenerated cellulose fiber.Herein,ionic liquids with low vapor pressure,nonflammability,relatively simple recovery,and high dissolution efficiency were used to fabricate regenerated cellulose fibers.The viscose and lyocell properties of the fibers were systematically compared,including microscopic morphology,dyeing behavior,fibrillation resistance,mechanical properties,yarn-forming capacity,and fabric performance.The ionic liquid(IL)fiber exhibited a smooth surface and circular cross-section,with the highest tensile strength,moderate dyeing and fibrillation properties,and similar spinning and weaving performance.This work can provide a reference for the commercial application of regenerated cellulose fibers fabricated from ionic liquid.展开更多
锌铝镁镀层具有出色的耐蚀性、良好的成形性和轻量化潜力等优势,在汽车领域具有广泛的应用前景,符合新一代绿色、低碳、降本的制造要求。本文通过SEM、辉光放电光谱仪(GDS)、XRD、盐雾实验(SST)箱等设备对比研究了不同镀层厚度(35、50和...锌铝镁镀层具有出色的耐蚀性、良好的成形性和轻量化潜力等优势,在汽车领域具有广泛的应用前景,符合新一代绿色、低碳、降本的制造要求。本文通过SEM、辉光放电光谱仪(GDS)、XRD、盐雾实验(SST)箱等设备对比研究了不同镀层厚度(35、50和90 g/m^(2))的镀层组织及中性盐雾(Neutral Salt Spray,NSS)和循环盐雾(Circulating Salt Spray,CSS)环境下的腐蚀行为。结果表明:锌铝镁镀层组织相同,均由富Zn相、Zn/MgZn_(2)二元共晶相和Zn/Al/MgZn_(2)三元共晶相组成;锌铝镁镀层的厚度对耐腐蚀性有显著影响,镀层的耐腐蚀性随镀层厚度的增加而提升。随着镀层厚度的增加,镀层表面的主要腐蚀产物是Zn5(OH)_(8)Cl_(2)•H_(2)O,这有利于减缓镀层的腐蚀。展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.22005226 and 52203124)Center for Carbon Neutral Chemistry,Institute of Chemistry,Chinese Academy of Sciences(No.CCNC-202402)+1 种基金the Basic and Advanced Research Project from Wuhan Science and Technology Bureau(No.2022013988065201)Hubei Integrative Technology and Innovation Center for Advanced Fiberous Materials,project(No.XC2024G3013)。
文摘As the global textile industry has accelerated its transition to a circular economy,iterative innovation in regenerated cellulose fibers has become a key industry focus.With viscose fiber having been industrialized for over a century and lyocell fiber gaining market recognition because of its environmentally friendly process,which is the next regenerated cellulose fiber.Herein,ionic liquids with low vapor pressure,nonflammability,relatively simple recovery,and high dissolution efficiency were used to fabricate regenerated cellulose fibers.The viscose and lyocell properties of the fibers were systematically compared,including microscopic morphology,dyeing behavior,fibrillation resistance,mechanical properties,yarn-forming capacity,and fabric performance.The ionic liquid(IL)fiber exhibited a smooth surface and circular cross-section,with the highest tensile strength,moderate dyeing and fibrillation properties,and similar spinning and weaving performance.This work can provide a reference for the commercial application of regenerated cellulose fibers fabricated from ionic liquid.
文摘锌铝镁镀层具有出色的耐蚀性、良好的成形性和轻量化潜力等优势,在汽车领域具有广泛的应用前景,符合新一代绿色、低碳、降本的制造要求。本文通过SEM、辉光放电光谱仪(GDS)、XRD、盐雾实验(SST)箱等设备对比研究了不同镀层厚度(35、50和90 g/m^(2))的镀层组织及中性盐雾(Neutral Salt Spray,NSS)和循环盐雾(Circulating Salt Spray,CSS)环境下的腐蚀行为。结果表明:锌铝镁镀层组织相同,均由富Zn相、Zn/MgZn_(2)二元共晶相和Zn/Al/MgZn_(2)三元共晶相组成;锌铝镁镀层的厚度对耐腐蚀性有显著影响,镀层的耐腐蚀性随镀层厚度的增加而提升。随着镀层厚度的增加,镀层表面的主要腐蚀产物是Zn5(OH)_(8)Cl_(2)•H_(2)O,这有利于减缓镀层的腐蚀。
