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Sm2O3 and TiB2 were used as codeposited particles in electrodeposition Ni-TiB2-Sm2O3 composite coatings to improve its performance. Ni-TiB2-Sm2O3 composite coatings were electrodeposited in the nickel sulfate,hexadecylpyridinium bromide and cetyltrimethylammonium bromide solution containing TiB2 and Sm2O3 particles. The content of codeposited Sm2O3 in the composite coating was controlled by changing the concentrations of Sm2O3 particles in the solution. The composite coatings were characterized with X-ray diffraction(XRD) and inductively coupled plasma-atomic emission spectrometer(ICP-AES) . The effects of Sm2O3 content on microhardness,wear weight loss and friction coefficient of composite coatings were investigated,respectively. The microhardness of the Ni-TiB2-Sm2O3 composite coatings was 19.35%,16.58%,2.03% higher than that of the Ni coating,Ni-Sm2O3 and Ni-TiB2 composite coatings,respectively. The wear weight loss of the Ni-TiB2-Sm2O3 composite coatings was 7,2.33,1.22 times lower than that of the Ni coating,Ni-Sm2O3 and Ni-TiB2 composite coatings,respectively. The friction coefficient of the Ni coating,Ni-Sm2O3,Ni-TiB2 and Ni-TiB2-Sm2O3 composite coatings were 0.712,0.649,0.850 and 0.788,respectively. The loading-bearing capacity and the wear-reducing effect of the Sm2O3 particles were closely related to the content of Sm2O3 particles in the composite coatings. 相似文献
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我厂在生产皱纹卫生纸的基础上又开发了压花餐巾纸、面巾纸、香水纸巾等品种。为满足产品质量的要求,曾在原料配比、制浆工艺等方面不断进行改进,1992年又进行了阳离子聚丙烯酰胺(CPAM)的添加应用,效果良好。一、CPAM的特性 1.化学式:(CH_2-CHCONH_2)。 2.分子量:1800万。 3.外观:白色粉末。 4.有良好的纤维分散性,阻止纤维絮聚,促进纤维伸展。 相似文献
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为探索喷气涡流纺纱免浆织造的可能性,本文通过实际生产试验分析了不同线密度喷气涡流纺粘胶纱线免浆织造对织物织造效率的影响,并进一步探讨了18.5tex涡流纺粘胶纱在喷气织机上免浆织造时,织物经密和门幅对织造效率的影响。试验得出:涡流纺粘胶纱在喷气织机上进行免浆织造时,其线密度应不低于18.5tex;织造效率会随着织物经密和门幅的增加而降低。18.5tex涡流纺粘胶纱在喷气织机上免浆织造时,织物经密和门幅应不高于20根/cm和不高于175cm。本文对喷气涡流纺纱的免浆织造具有一定指导意义。 相似文献
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沙门氏菌是重要的食源性致病菌,控制食品中沙门氏菌的污染,特别是防止其形成生物被膜交叉污染食品,对保障食品安全具有重要意义。现阶段传统的物理性、化学性控制措施都存在一定的局限性,难以有效将沙门氏菌生物被膜完全去除,因此,亟待开发针对沙门氏菌生物被膜的新型控制和清除策略。近年来噬菌体作为一种安全、有效、无残留的天然抑菌剂受到了普遍关注,与化学消毒剂相比,其具有特异性强、自我增殖快、安全性高、研发时间短等突出优势,在食源性致病菌生物被膜的控制和清除领域已表现出巨大潜力。该文综述了沙门氏菌生物被膜的结构成分与形成过程,并重点介绍了国内外用噬菌体破解沙门氏菌生物被膜的作用机制与应用现状。针对噬菌体的未来研究方向进行了展望,以期为食品加工过程中沙门氏菌生物被膜的有效控制提供新的技术与策略。 相似文献