The study investigated the effect of eggshell and groundnut husk as fillers on flexible polyether foam.The fillers with the particle sizes of 50μm each were mixed in the ratio of 50:50.Diverse percentages of the two ...The study investigated the effect of eggshell and groundnut husk as fillers on flexible polyether foam.The fillers with the particle sizes of 50μm each were mixed in the ratio of 50:50.Diverse percentages of the two combined fillers ranging from 10%,20%,30%,40%and 50%were incorporated into the polyether recipes in the appropriate foam formulations and foam samples were produced.The unfilled foam(0%filler)served as the standard control sample.The physico-mechanical test carried out on the foam showed increase in the properties such as density,compression set test,indentation hardness test,tensile strength test and decrease for elongation at break test as compared to the unfilled foam.The scanning electron microscopy result showed the cell sizes became smaller and concentrated with an irregular shape as the filler load increased,thereby making it denser and thicker.Eggshell and groundnut husk fillers may be used in the making of flexible polyether foam since these materials are organic in natures.They can improve the mechanical properties and biodegradability of polyurethane product.The utilization of these fillers in polymer composites productin will help in sanitizing the environment by reducing landfills and producing eco-friendly waste and also it influences cost positively.展开更多
The microstructure characteristics of shell plates of chiton Liolophura japonica Lischke were analyzed using environmental scanning electron microscopy （ESEM）. The results show that the internal structure of the she...The microstructure characteristics of shell plates of chiton Liolophura japonica Lischke were analyzed using environmental scanning electron microscopy （ESEM）. The results show that the internal structure of the shell plate of chiton Liolophurajaponica is composed of seven calcium layers which were crossed lamellar crystallites, homoge- neous structure, granular crystallites, and trabecular type crystallites. The element compositions of shell plates were analyzed using X-ray photoelectron spectroscopy （XPS）. The results determined by XPS show that the surface chemical states of various layers are different. There are 13 elements （Na, O, N, C, S, P, Ca, C1, Si, A1, K, Fe, Mg） on the shell plate of chiton L. japonica. Among the 13 elements, 11 are on the outside pigment layer except K and S. Among seven layers of shell plate, there is the largest quantity of elements on the outside pigment layer, and the least quantity of elements is on layer C （Articulamentum auctorum）. There are 7 elements on the layer C （Articulamentum auctorum）. Be- sides calcium carbonate, there are some inorganic compounds on the shell plate, such as NaC1, MgO, A1203, silicate, sulfate and phosphate. There are some organic chemical components, such as carbohydrate, organic sulfide, and organic nitride on the shell plates.展开更多
文摘The study investigated the effect of eggshell and groundnut husk as fillers on flexible polyether foam.The fillers with the particle sizes of 50μm each were mixed in the ratio of 50:50.Diverse percentages of the two combined fillers ranging from 10%,20%,30%,40%and 50%were incorporated into the polyether recipes in the appropriate foam formulations and foam samples were produced.The unfilled foam(0%filler)served as the standard control sample.The physico-mechanical test carried out on the foam showed increase in the properties such as density,compression set test,indentation hardness test,tensile strength test and decrease for elongation at break test as compared to the unfilled foam.The scanning electron microscopy result showed the cell sizes became smaller and concentrated with an irregular shape as the filler load increased,thereby making it denser and thicker.Eggshell and groundnut husk fillers may be used in the making of flexible polyether foam since these materials are organic in natures.They can improve the mechanical properties and biodegradability of polyurethane product.The utilization of these fillers in polymer composites productin will help in sanitizing the environment by reducing landfills and producing eco-friendly waste and also it influences cost positively.
基金Supported by the Foundation of National 908 Program (908-01-ST12)the National High Technology Research and Development Program of China(863 Program) (2007AA09Z433)
文摘The microstructure characteristics of shell plates of chiton Liolophura japonica Lischke were analyzed using environmental scanning electron microscopy （ESEM）. The results show that the internal structure of the shell plate of chiton Liolophurajaponica is composed of seven calcium layers which were crossed lamellar crystallites, homoge- neous structure, granular crystallites, and trabecular type crystallites. The element compositions of shell plates were analyzed using X-ray photoelectron spectroscopy （XPS）. The results determined by XPS show that the surface chemical states of various layers are different. There are 13 elements （Na, O, N, C, S, P, Ca, C1, Si, A1, K, Fe, Mg） on the shell plate of chiton L. japonica. Among the 13 elements, 11 are on the outside pigment layer except K and S. Among seven layers of shell plate, there is the largest quantity of elements on the outside pigment layer, and the least quantity of elements is on layer C （Articulamentum auctorum）. There are 7 elements on the layer C （Articulamentum auctorum）. Be- sides calcium carbonate, there are some inorganic compounds on the shell plate, such as NaC1, MgO, A1203, silicate, sulfate and phosphate. There are some organic chemical components, such as carbohydrate, organic sulfide, and organic nitride on the shell plates.
