The use of epoxy resin(EP)to prepare epoxy recycled asphalt mixture can achieve the reuse of 100%reclaimed asphalt pavement(RAP).However,the high stiffness and brittleness of epoxy resin result in insufficient crack r...The use of epoxy resin(EP)to prepare epoxy recycled asphalt mixture can achieve the reuse of 100%reclaimed asphalt pavement(RAP).However,the high stiffness and brittleness of epoxy resin result in insufficient crack resistance of mixture.To address the issue,dry-method styrene-butadiene-styrene(DSBS)and epoxy resin were mixed with aged asphalt to prepare SBS-modified epoxy reclaimed asphalt(SERA).The micro fusion characteristics and mechanical properties of SERA were evaluated,and the optimal DSBS dosage was determined based on various tests.The results show that adding DSBS can enable the tensile toughness and low-temperature performance of SERA with less EP content to reach or exceed the performance level of epoxy reclaimed asphalt(ERA)with higher EP content.At 30%EP content,the recommended dry-method SBS content is 9%;At 40%EP content,the recommended dry-method SBS content is 5%;When the EP content is 50%,the recommended dry-method SBS content is 7%.展开更多
腐竹是优质的素食豆制品,具有较高的营养价值。文章研究了热风干燥(hot air drying,HAD)和热风-真空干燥(hot air combined with vacuum drying,HA-VD)方式对腐竹品质的影响。结果表明,与HAD腐竹相比,HA-VD可以有效缩短腐竹的干燥时间,H...腐竹是优质的素食豆制品,具有较高的营养价值。文章研究了热风干燥(hot air drying,HAD)和热风-真空干燥(hot air combined with vacuum drying,HA-VD)方式对腐竹品质的影响。结果表明,与HAD腐竹相比,HA-VD可以有效缩短腐竹的干燥时间,HA-VD组的色泽和感官评分得到了显著的提升,质构特性和表面微观结构呈现显著性差异,蒸煮损失率和持水性呈现负相关关系,HA-VD腐竹的复水速率显著高于HAD腐竹。该研究可为腐竹行业提供腐竹干燥技术参考。展开更多
Chalcogenide thin films incorporating rare-earth (RE) elements with applicationsin optics, electronics, and magnetics have received considerable attention.Aiming at growing pure chalcogenides, dry-method syntheses hav...Chalcogenide thin films incorporating rare-earth (RE) elements with applicationsin optics, electronics, and magnetics have received considerable attention.Aiming at growing pure chalcogenides, dry-method syntheses have beendeveloped. In this review, we summarize the progress thus far on lowdimensionalRE-based chalcogenides (RECs), covering fabrication methods,structures, and applications. This review also provides the summary and perspectivesof the challenges of fabrication and opportunities on the applicationof RECs in the future.展开更多
基金Funded by the National Natural Science Foundation of China(Nos.52378444,52078130)the Natural Science Foundation of Shandong Province(No.ZR2021QE250)。
文摘The use of epoxy resin(EP)to prepare epoxy recycled asphalt mixture can achieve the reuse of 100%reclaimed asphalt pavement(RAP).However,the high stiffness and brittleness of epoxy resin result in insufficient crack resistance of mixture.To address the issue,dry-method styrene-butadiene-styrene(DSBS)and epoxy resin were mixed with aged asphalt to prepare SBS-modified epoxy reclaimed asphalt(SERA).The micro fusion characteristics and mechanical properties of SERA were evaluated,and the optimal DSBS dosage was determined based on various tests.The results show that adding DSBS can enable the tensile toughness and low-temperature performance of SERA with less EP content to reach or exceed the performance level of epoxy reclaimed asphalt(ERA)with higher EP content.At 30%EP content,the recommended dry-method SBS content is 9%;At 40%EP content,the recommended dry-method SBS content is 5%;When the EP content is 50%,the recommended dry-method SBS content is 7%.
文摘腐竹是优质的素食豆制品,具有较高的营养价值。文章研究了热风干燥(hot air drying,HAD)和热风-真空干燥(hot air combined with vacuum drying,HA-VD)方式对腐竹品质的影响。结果表明,与HAD腐竹相比,HA-VD可以有效缩短腐竹的干燥时间,HA-VD组的色泽和感官评分得到了显著的提升,质构特性和表面微观结构呈现显著性差异,蒸煮损失率和持水性呈现负相关关系,HA-VD腐竹的复水速率显著高于HAD腐竹。该研究可为腐竹行业提供腐竹干燥技术参考。
基金National Natural Science Foundation of China,Grant/Award Numbers:21522106,21971117Nankai University,Grant/Award Number:ZB19500202+4 种基金111 ProjectChina National Funds for Excellent Young ScientistsWe gratefully acknowledge the support from the China National Funds for Excellent Young Scientists(grant no.21522106)National Natural Science Foundation of China(grant no.21971117)111 Project(B18030)from China,and the Open Funds(RERU2019001)of the State Key Laboratory of Rare Earth Resource Utilization and the Functional Research Funds for the Central Universities,Nankai University(ZB19500202).
文摘Chalcogenide thin films incorporating rare-earth (RE) elements with applicationsin optics, electronics, and magnetics have received considerable attention.Aiming at growing pure chalcogenides, dry-method syntheses have beendeveloped. In this review, we summarize the progress thus far on lowdimensionalRE-based chalcogenides (RECs), covering fabrication methods,structures, and applications. This review also provides the summary and perspectivesof the challenges of fabrication and opportunities on the applicationof RECs in the future.
文摘针对激光诱导击穿光谱(Laser-Induced Breakdown Spectroscopy,LIBS)检测茶水中痕量重金属存在的样品富集速度慢、液体飞溅、光谱信号弱和检测灵敏度低等问题,研制了一种基于干滴法的茶水痕量重金属快速富集装置,结合金银纳米粒子(Gold and Silver Nanoparticles,Au-AgNPs)改性的聚丙烯腈(Polyacrylonitrile,PAN)纳米纤维膜,增强了LIBS光谱信号,提高了茶水中痕量重金属检测的灵敏度。实验结果表明:茶水痕量重金属快速富集装置供液模块的平均相对误差为4.6%,温度控制的平均相对误差为3.1%。在富集装置最佳参数为加热温度60℃、茶水用量0.6 mL、供液速度2.0 mL/h时,Cr和Cu的定标曲线R^(2)分别为0.994和0.996,检测限(Limit of Detection,LOD)分别为3μg/L和7μg/L。选取我国7种不同类型的市售茶(花茶、绿茶、青茶、白茶、黄茶、红茶、黑茶)作为真实样本进行验证,实验结果表明:Cr和Cu浓度检测的平均相对误差分别为5.9%和6.4%,与电感耦合等离子体质谱(Inductively Coupled Plasma Mass Spectrometry,ICP-MS)检测结果相当,可为LIBS技术在茶水重金属检测中的应用提供方法支撑。
