Molecular layer deposition （MLD） for the deposition of polyimide （PI） at low temperature of 110 ℃ has been firstly introduced into the field of membrane separation. With the optimized MLD deposition parameters, s...Molecular layer deposition （MLD） for the deposition of polyimide （PI） at low temperature of 110 ℃ has been firstly introduced into the field of membrane separation. With the optimized MLD deposition parameters, such low de- position temperature has successfully expanded the application of MLD for the surface modification of polymeric materials. Globular PI particulates grow on both the free surfaces as well as the pore walls of the polypropylene （PP） membranes as isolated islands during progressive precursor exposures. The PI-deposited PP membranes ex- hibit synergistically improved performances in various aspects. Evidently improved surface hydrophilicity and per- meation performance （30%） have been achieved v/a the MLD deposition of polyimide films. The overall separation efficiency maintained higher than 85% even after 250 cycles of MLD deposition. More importantly, the thermal sta- bility has been improved and the integrity of the porous structure for PI-deposited PP membranes has been well preserved even after harsh treatment, which ensures its potential application in industries.展开更多
Selection of materials,as an area of design research,has been under considerable interest over the years.Materials selection is one of the most important activities in the product development process.Inappropriate dec...Selection of materials,as an area of design research,has been under considerable interest over the years.Materials selection is one of the most important activities in the product development process.Inappropriate decision of materials can cause the product to be reproduced or remanufactured.To avoid this circumstance,one of the useful tools that can be employed in determining the most appropriate material is analytical hierarchy process(AHP).To illustrate the application of AHP,six different types of composite materials were considered.The most appropriate one for suitability of use in manufacturing automotive bumper beam was determined by considering eight main selection factors and 12 sub-factors.The AHP analysis reveals that the glass fibre epoxy is the most appropriate material because it has the highest value(25.7%,mass fraction) compared with other materials.The final material is obtained by performing six different scenarios of the sensitivity analysis.It is proved that glass fibre epoxy is the most optimum decision.展开更多
基金Supported by the National Basic Research Program of China(2015CB655301)the Jiangsu Natural Science Foundation(BK20150063)+1 种基金the Natural Science Research Program of the Jiangsu Higher Education Institutions(13KJA430005)the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)
文摘Molecular layer deposition （MLD） for the deposition of polyimide （PI） at low temperature of 110 ℃ has been firstly introduced into the field of membrane separation. With the optimized MLD deposition parameters, such low de- position temperature has successfully expanded the application of MLD for the surface modification of polymeric materials. Globular PI particulates grow on both the free surfaces as well as the pore walls of the polypropylene （PP） membranes as isolated islands during progressive precursor exposures. The PI-deposited PP membranes ex- hibit synergistically improved performances in various aspects. Evidently improved surface hydrophilicity and per- meation performance （30%） have been achieved v/a the MLD deposition of polyimide films. The overall separation efficiency maintained higher than 85% even after 250 cycles of MLD deposition. More importantly, the thermal sta- bility has been improved and the integrity of the porous structure for PI-deposited PP membranes has been well preserved even after harsh treatment, which ensures its potential application in industries.
基金the financial support through Research University Grant Scheme 2007 (RUG 2007) with vote number 91045
文摘Selection of materials,as an area of design research,has been under considerable interest over the years.Materials selection is one of the most important activities in the product development process.Inappropriate decision of materials can cause the product to be reproduced or remanufactured.To avoid this circumstance,one of the useful tools that can be employed in determining the most appropriate material is analytical hierarchy process(AHP).To illustrate the application of AHP,six different types of composite materials were considered.The most appropriate one for suitability of use in manufacturing automotive bumper beam was determined by considering eight main selection factors and 12 sub-factors.The AHP analysis reveals that the glass fibre epoxy is the most appropriate material because it has the highest value(25.7%,mass fraction) compared with other materials.The final material is obtained by performing six different scenarios of the sensitivity analysis.It is proved that glass fibre epoxy is the most optimum decision.
