共查询到20条相似文献,搜索用时 156 毫秒
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《明胶科学与技术》2007,27(4):210-213
猪皮的不同脱脂方法对胶原提取率的影响赵帅,巩旭,李国英.中国皮革2007,36(9):33~36.分别用4种有机溶剂、2种非离子型脱脂剂、不同用量的脂肪酶、非离子型脱脂剂AX-AUT-50和异丙醇两步法、非离子型脱脂剂AXAUT-50和脂肪酶两步法,脱除新鲜猪皮中的脂肪。对脱脂后的碎皮块提取胶原。结果表明:用单一试剂脱脂时,2种非离子型脱脂剂的脱脂效果最好,脱脂率均高达67%以上,相应的胶原提取率也在22%以上。两步法脱脂的效果比任何单一试剂脱脂的效果都好,尤其是AXAUT-50和异丙醇两步脱脂,其脱脂率高达90%以上,相应的胶原提取率也高达28.52%。十… 相似文献
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轧制后的带钢在退火前需要在60~70℃的强碱条件下脱脂清洗,过多的使用碱剂会腐蚀带钢,产生碱雾,损害工作环境,残留的碱也会吸附在带钢表面消耗大量清水漂洗。为了减少带钢脱脂工艺强碱的使用量,将PO封端脂肪酸甲酯乙氧基化物(FMEE)作为脱脂剂的主体成分,复配阴离子型渗透剂伯烷基磺酸钠(PAS80),烷基醇酰胺(6501)、铁粉捕捉剂乙二胺二邻苯基乙酸钠(EDDHA-Na),并通过正交实验确定四种原料的最佳质量比为:m(FMEE)∶m(PAS-80)∶m(6501)∶m(EDDHA-Na)=3∶2∶1∶1。该脱脂剂与纯碱共同应用于带钢退火前脱脂,在弱碱性条件下即可获得良好的脱脂效果。 相似文献
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普通PS版感光特性的研究 总被引:1,自引:1,他引:0
计算机直接制版技术(CTP)是当前印刷技术领域研究的热点问题之一,采用传统PS版的计算机直接制版(CTCP)由于继续沿用传统的预涂感光版(PS版),在印刷适性、耐印力、印品分辨率等方面具有明显的优势,同时成本低,市场量大。但人们对PS版感光材料曝光特性的研究相对较少,本文给出了1种超感度重氮盐PS版的最低曝光能量同波长之间的关系,在波长405nm处所需的临界曝光能量仅为10.35m J/cm2。从曝光前后颜色密度值变化、感光材料红外分析方面,对PS版的曝光效果做了详细的测量。 相似文献
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电镀工业对金属表面进行电镀之前必须对金属表面进行除油工序,除油工序中使用的除油剂若泡沫过多则会影响生产过程的进行。本文所研究的除油剂是一种低泡沫的水基金属除油剂,通过提高各种表面活性剂相互之间的协同增效作用,减少表面活性剂的用量来降低除油过程的泡沫,最终筛选出的适用于金属除油的表面活性剂最佳配比为TX-10∶MOA-5∶FMES∶LAB=4∶1∶3∶1。 相似文献
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Satoshi Morikubo Aoi Nishida Daisuke Enomoto Takefumi Narita Yasuhiko Takuma 《加拿大化工杂志》2023,101(12):6755-6763
Heavy metals such as zinc are widely used in plating plants for the processing of material surfaces; therefore, an adequate wastewater treatment is required afterwards to comply with wastewater regulations. However, the presence of chemicals such as degreasing agents in the wastewater generated from the plating process inhibits the formation of hydroxides, thereby making treatment of wastewater and compliance with the stipulated regulations difficult. Herein, the effects of fine bubbles on oil cleaning and wastewater treatment were investigated for developing an alternative cleaning technology to degreasing agents. The concentration of fine bubbles significantly affected the oil cleaning. The fine bubbles demonstrated remarkable cleaning of highly viscous oil, which was difficult to remove using pure water. The high cleaning effect of fine bubbles on oil was achieved because of the hydrophobic interaction of the bubbles. Furthermore, a decrease in cleaning effect was observed for samples with uneven shapes, which was attributed to the difficulty in penetration of fine bubbles in materials with irregularities. Furthermore, fine bubble cleaning exhibited better efficiency for wastewater treatment than degreaser cleaning. Therefore, fine bubble cleaning is speculated to be an excellent cleaning technology with high oil cleaning effectiveness and improved wastewater treatability. 相似文献
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胶印PS版与感光胶浅析 总被引:1,自引:1,他引:0
胶版印刷在整个印刷领域中占据了主导地位。胶版印刷采用的预制感光版(PS版)已成为胶印的主要版材。目前。我国PS版的年生产能力已达3500万m2,仅从数量上看已经供大于求,但是存在品种少的缺憾。提高PS版质量,增加PS版品种的工作重点之一是改进感光胶质量。本文还简要介绍了计算机直接制版技术(CTP),并指出CTP非银盐版材和热敏版材将是今后CTP版材的发展方向。 相似文献
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This article reports the effect of cell structure on oil absorption of highly oil-absorptive polyurethane foam (ON-PUR), which is suitable for on-site foaming. We have developed ON-PUR as an oil absorbing polyurethane foam using a very reactive recipe. ON-PUR was synthesized by mixing polyol, water, additives, and polymeric diphenylmethane diisocyanate (P-MDI) using a high-pressure foaming machine. Density, airflow, oil absorption of this foam, and cell structure by microscopy were measured. From these results, it was found that the airflow of this foam increased by crushing, and the oil absorption of this foam increased sharply in a narrow airflow range (from 0.1 to 0.8 scfm). This increase is estimated to be due to the decrease of closed cell structures by crushing treatment. Furthermore, we constituted on-site foaming system in bench scale, which was expected to be applicable to on-site preparation of ON-PUR. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65: 179–186, 1997 相似文献