-
单分子膨胀型阻燃剂季戊四醇酯三聚氰胺磷酸盐阻燃高密度聚乙烯
采用自行合成的单分子膨胀阻燃剂季戊四醇酯三聚氰胺磷酸盐(MPPL)以及混合型膨胀阻燃剂三聚氰胺磷酸盐(MP)/李戊四醇(PEL)阻燃高密度聚乙烯,比较了2种阻燃材料的各项性能指标,研究表明:单分子膨胀阻燃材料体系具有更优异的阻燃性能、机械力学性能以及耐水性.通过热失重测试和炭层形貌表征分析研究了2种体系阻燃性能显著差异的原因.刘渊,李江,徐熠,王琪 - 塑料文章来源： 万方数据 -
Flame Retardancy, Smoke Suppression Effect and Mechanism of Aryl Phosphates in Combination with Magnesium Hydroxide in Polyamide 6
The flammability, smoke emission behavior and mechanical properties of two oligomeric aryl phosphates [bisphenol A bis(diphenyl phosphate) (BDP) and resorcinol bis(diphenyl phosphate) (RDP)] combined with magnesium hydroxide (MH) in polyamide 6 (PA6) have been investigated. Combining 5 wt% BDP, 50 wt% MH imparts a limiting oxygen index (LOI) of 40.9% and UL94 V-0 rating to PA6, meanwhile the peak rate of smoke release (pRSR), total release of smoke (TSR) and Izod notched impact strength are 41%, 33% and 233% relative to the corresponding value of 55 wt% MH without BDP, respectively. Dynamic mechanical analysis (DMA) indicates that the improvement of toughness attributes to the enhanced compatibility between MH and PA6 by adding BDP. Furthermore, based on the comprehensive analysis of thermogravimetry (TG), cone calorimeter and SEM-EDX investigations, possible flame retardancy and smoke suppression mechanisms were revealed. Besides the fuel dilution and barrier effect of MH, the combination of MH and RDP shows an additional flame inhibition effect. The combination of MH and BDP results in a dominant condensed phase barrier effect which leads to obvious reduction on smoke emission and flammability.陈俊,刘述梅 - 武汉理工大学学报(材料科学版)(英文版)文章来源： 万方数据 -
有机溶质转运体仅-β在胆汁酸代谢及胆汁淤积症中的作用
过去20多年的研究发现了数个在胆汁酸肠肝循环中重要的转运体,包括肝细胞摄取胆汁酸的钠离子一牛磺胆酸共转运多肽(Na-Tauroeholate Co-transporting Polypeptide,NTCP),肝细胞输出胆汁酸的胆盐输出泵(Bile Salt Export Pump,BSEP)及回肠顶端膜刷状缘吸收胆汁酸的顶膜钠离子依赖性胆汁酸转运体(Apical Sodium-dependent Bile acid Transporter,ASBT).库尔班江·阿布都西库尔,王建设 - 肝脏文章来源： 万方数据 -
含在线处理的熔盐堆源项计算
熔盐堆是第四代国际核能论坛推荐的6种先进四代堆之一,具有良好的中子经济性、固有安全性、可在线后处理等特点.基于熔盐燃料和冷却剂的流动性,熔盐堆可对堆内产生的放射性气体进行在线移除,周期性地从熔盐泵中除去135Xe和85Kr等中子毒物,以提高燃料循环过程中的中子经济性.目前主要的源项计算软件并不完全适用于熔盐堆在线除气情况下的源项计算,为了解熔盐堆在线处理情况下的源项分布,为熔盐堆辐射防护设计提供参考依据,并验证熔盐堆在线处理情况下源项计算方法的可行性和计算结果的可靠性,采用实际运行过的美国橡树岭国家实验室熔盐实验堆(Molten Salt Reactor Experiment,MSRE)参数,应用自主开发的PostTRITON程序计算了含在线处理情况下的源项,分析了熔盐堆裂变产物产额及氚的产生情况,并应用SCALE5.1软件包中TRITON模块计算了无在线处理情况下的源项,分析了数据偏差的原因,并与橡树岭国家实验室的计算数据进行了比较,计算结果在土8%的范围内符合一致.通过本研究,验证了在线处理下熔盐堆源项计算方法的可行性和结果的可靠性,可为熔盐堆的辐射防护设计提供重要的参考.张志宏,夏晓彬,朱兴望,蔡军 - 核技术文章来源： 万方数据
科创中国
