Seaweed polysaccharides are a type of natural high-molecular active substances extracted and purified from seaweed. They are formed from different mon- esaccharide units through glucosidic bonds, with the advantages o...Seaweed polysaccharides are a type of natural high-molecular active substances extracted and purified from seaweed. They are formed from different mon- esaccharide units through glucosidic bonds, with the advantages of high viscosity, good gel property, environmental-friendly and low cost. In this review, we focus on the progress of the application of seaweed polysaecharides in the fields including food, medicine, tissue engineering and environment engineering, where seaweed polysaccharides are used as food additives, edible coating materials, drug-release materials, medical dressing, tissue scaffolds and environmental adsorption materi- als. Introducing special properties, such as targeting, electrical conductivity and thermasensitivity, and designing bionic controllable micro/nanostructures to fabri- cate and develop multi-functional, intelligent seaweed polysaccharides would be the research hotspot in the future.展开更多
The compositions, structures and properties of envi- ronmental-friendly ramming materials for mud package and taphole of large-scaled blast furnaces were studied. The results show that the formation of silica fibers m...The compositions, structures and properties of envi- ronmental-friendly ramming materials for mud package and taphole of large-scaled blast furnaces were studied. The results show that the formation of silica fibers makes structure of ramming materials dense. During the process of extruding mud and ramming materials, SiC is partly oxidized ; CaO , F% 03 and carbon penetrate towards the outer wall. The improvement of ramming materials can inhibit the penetration of molten slag, iron and carbon. The bulk density of environmental-friendly ramming ma- terials dried at 200 ℃ is 2.90 g · cm-3, the cold com- pressive strength of this kind of ramming materials dried at 200 ℃ is about 17. 0 MPa and fired at I 450 ℃ is about 39. 2 MPa.展开更多
On September 13-14th, the 13th China International Man-made Fiber Conference (Ke Qiao 2007) was held in the county of Ke Qiao, Shaoxing County, Zhejiang Province of China,
Cement,phosphorous slag(PS),and steel slag(SS)were used to prepare low-carbon cementitious materials,and triisopropanolamine(TIPA)was used to improve the mechanical properties by controlling the hydration process.The ...Cement,phosphorous slag(PS),and steel slag(SS)were used to prepare low-carbon cementitious materials,and triisopropanolamine(TIPA)was used to improve the mechanical properties by controlling the hydration process.The experimental results show that,by using 0.06%TIPA,the compressive strength of cement containing 60%PS or 60%SS could be enhanced by 12%or 18%at 28 d.The presence of TIPA significantly affected the hydration process of PS and SS in cement.In the early stage,TIPA accelerated the dissolution of Al in PS,and the formation of carboaluminate hydrate was facilitated,which could induce the hydration;TIPA promoted the dissolution of Fe in SS,and the formation of Fe-monocarbonate,which was precipitated on the surface of SS,resulting in the postponement of hydration,especially for the high SS content.In the later stage,under the continuous solubilization effect of TIPA,the hydration of PS and SS could refine the pore structure.It was noted that compared with portland cement,the carbon emissions of cement-PS-TIPA and cement-SS-TIPA was reduced by 52%and 49%,respectively.展开更多
基金supported by Xiamen Southern Oceanographic Center(14GQT61HJ31)the Scientific Research Foundation of the Third Institute of Oceanography,SOA(No.201108)
文摘Seaweed polysaccharides are a type of natural high-molecular active substances extracted and purified from seaweed. They are formed from different mon- esaccharide units through glucosidic bonds, with the advantages of high viscosity, good gel property, environmental-friendly and low cost. In this review, we focus on the progress of the application of seaweed polysaecharides in the fields including food, medicine, tissue engineering and environment engineering, where seaweed polysaccharides are used as food additives, edible coating materials, drug-release materials, medical dressing, tissue scaffolds and environmental adsorption materi- als. Introducing special properties, such as targeting, electrical conductivity and thermasensitivity, and designing bionic controllable micro/nanostructures to fabri- cate and develop multi-functional, intelligent seaweed polysaccharides would be the research hotspot in the future.
文摘The compositions, structures and properties of envi- ronmental-friendly ramming materials for mud package and taphole of large-scaled blast furnaces were studied. The results show that the formation of silica fibers makes structure of ramming materials dense. During the process of extruding mud and ramming materials, SiC is partly oxidized ; CaO , F% 03 and carbon penetrate towards the outer wall. The improvement of ramming materials can inhibit the penetration of molten slag, iron and carbon. The bulk density of environmental-friendly ramming ma- terials dried at 200 ℃ is 2.90 g · cm-3, the cold com- pressive strength of this kind of ramming materials dried at 200 ℃ is about 17. 0 MPa and fired at I 450 ℃ is about 39. 2 MPa.
文摘On September 13-14th, the 13th China International Man-made Fiber Conference (Ke Qiao 2007) was held in the county of Ke Qiao, Shaoxing County, Zhejiang Province of China,
基金Funded by the Key Public Welfare Special Project of Henan Province(No.201300311000)the Major Technical Innovation Project in Hubei Province of China(No.2020BED025)。
文摘Cement,phosphorous slag(PS),and steel slag(SS)were used to prepare low-carbon cementitious materials,and triisopropanolamine(TIPA)was used to improve the mechanical properties by controlling the hydration process.The experimental results show that,by using 0.06%TIPA,the compressive strength of cement containing 60%PS or 60%SS could be enhanced by 12%or 18%at 28 d.The presence of TIPA significantly affected the hydration process of PS and SS in cement.In the early stage,TIPA accelerated the dissolution of Al in PS,and the formation of carboaluminate hydrate was facilitated,which could induce the hydration;TIPA promoted the dissolution of Fe in SS,and the formation of Fe-monocarbonate,which was precipitated on the surface of SS,resulting in the postponement of hydration,especially for the high SS content.In the later stage,under the continuous solubilization effect of TIPA,the hydration of PS and SS could refine the pore structure.It was noted that compared with portland cement,the carbon emissions of cement-PS-TIPA and cement-SS-TIPA was reduced by 52%and 49%,respectively.