The properties of high performance color hardener (HPCH) and the mechanism were studied.HPCH is a composite system, which is composed of cementitious and auxiliary cementing materials, composite additives, abrasion re...The properties of high performance color hardener (HPCH) and the mechanism were studied.HPCH is a composite system, which is composed of cementitious and auxiliary cementing materials, composite additives, abrasion resistance component (aggregate) and pigment. The porosity and pore structure of the material are obviously improved due to the activation, filling and adsorption of auxiliary cementing materials, thus resulting in a great increase of binding capacity for ions in HPCH and the obstacles of ion migrating.The density of material structure, bonding capacity of cementitious material to the abrasion-resisting component and the corrosion resistance are greatly and effectively improved by adding the auxiliary cementing materials and compound additives. According to the tests of dry shrinkage, sulphate resistance, chloride permeability and Ca(OH) 2 content distribution, the property superiority of HPCH is analyzed.The mechanism of materials modification of HPCH is explained from the microscopic point of view by testing the pore structure and pore distribution via the mercury intrusion pressure method.展开更多
Owing to their rich color,excellent mechanical properties,and favorable biocompatibility,colored zirconia ceramics have been widely used in intelligent terminals,dental restoration,colored decorations,and other potent...Owing to their rich color,excellent mechanical properties,and favorable biocompatibility,colored zirconia ceramics have been widely used in intelligent terminals,dental restoration,colored decorations,and other potential fields.This paper starts with the challenges faced by colored zirconia ceramics,followed by a summary of the application market of colored zirconia ceramics.Herein,we review various types of colorants and their mechanism of color development,summarize coloring methods,and analyze their advantages and disadvantages.Finally,the research progress on zirconia ceramics with red,blue,black,and other common colors is summarized,and future development directions are proposed in this review.展开更多
Footwear industries generate leather waste during the operation.Some of these wastes contain chromium,which may bring environmental concerns.This study aimed to reuse finished leather waste,the major part of these haz...Footwear industries generate leather waste during the operation.Some of these wastes contain chromium,which may bring environmental concerns.This study aimed to reuse finished leather waste,the major part of these hazard-ous wastes,via producing a composite with thermoplastic polyurethane(TPU)for shoe soles.Finished leather waste containing black dyes and pigments was used to color the TPU.The finished leather waste was fragmented,milled,micronized and blended with TPU in a ratio of 10%,15%,and 20%w/w to produce composite materials.The compos-ite materials were evaluated by morphological and thermal characterizations,physical-mechanical analysis,and envi-ronmental tests(leaching and solubilization),which presented that the physical-mechanical and thermal properties were within the standard of shoe soles,and the composites can be classified as non-hazardous.The composites enabled a new way of coloring polymeric matrices and reusing leather waste.展开更多
文摘The properties of high performance color hardener (HPCH) and the mechanism were studied.HPCH is a composite system, which is composed of cementitious and auxiliary cementing materials, composite additives, abrasion resistance component (aggregate) and pigment. The porosity and pore structure of the material are obviously improved due to the activation, filling and adsorption of auxiliary cementing materials, thus resulting in a great increase of binding capacity for ions in HPCH and the obstacles of ion migrating.The density of material structure, bonding capacity of cementitious material to the abrasion-resisting component and the corrosion resistance are greatly and effectively improved by adding the auxiliary cementing materials and compound additives. According to the tests of dry shrinkage, sulphate resistance, chloride permeability and Ca(OH) 2 content distribution, the property superiority of HPCH is analyzed.The mechanism of materials modification of HPCH is explained from the microscopic point of view by testing the pore structure and pore distribution via the mercury intrusion pressure method.
基金supported by the National Key R&D Program of China(No.2021YFE0104800).
文摘Owing to their rich color,excellent mechanical properties,and favorable biocompatibility,colored zirconia ceramics have been widely used in intelligent terminals,dental restoration,colored decorations,and other potential fields.This paper starts with the challenges faced by colored zirconia ceramics,followed by a summary of the application market of colored zirconia ceramics.Herein,we review various types of colorants and their mechanism of color development,summarize coloring methods,and analyze their advantages and disadvantages.Finally,the research progress on zirconia ceramics with red,blue,black,and other common colors is summarized,and future development directions are proposed in this review.
文摘Footwear industries generate leather waste during the operation.Some of these wastes contain chromium,which may bring environmental concerns.This study aimed to reuse finished leather waste,the major part of these hazard-ous wastes,via producing a composite with thermoplastic polyurethane(TPU)for shoe soles.Finished leather waste containing black dyes and pigments was used to color the TPU.The finished leather waste was fragmented,milled,micronized and blended with TPU in a ratio of 10%,15%,and 20%w/w to produce composite materials.The compos-ite materials were evaluated by morphological and thermal characterizations,physical-mechanical analysis,and envi-ronmental tests(leaching and solubilization),which presented that the physical-mechanical and thermal properties were within the standard of shoe soles,and the composites can be classified as non-hazardous.The composites enabled a new way of coloring polymeric matrices and reusing leather waste.
