Two distinct lignocellulosic fractions(rind and core)can be obtained through a physical separation of sugarcane stalks.Although presenting differences in morphology,both fractions can be employed to produce pulps and ...Two distinct lignocellulosic fractions(rind and core)can be obtained through a physical separation of sugarcane stalks.Although presenting differences in morphology,both fractions can be employed to produce pulps and papers.The pulps and paper sheets produced from the core and rind fractions were characterized by their chemical composition,physical properties and mechanical properties.The pulps obtained from the core presented a higher amount of fines,lower drainage ability and rendered denser and stiffer sheets.The pulps from the rind,which have a higher content of fibers and higher degree of polymerization,produced sheets with higher air permeability and water absorption.Both paper sheets presented mechanical and physical properties comparable to commercial papers and papers from different cellulosic sources.The different properties exhibited by the papers produced from each fraction allow their use for distinct purposes,and expands the opportunities in the context of sugarcane biorefinery.展开更多
New trends in the area of material improvement are the use of natural nano-charges from renewable biomass,improving the value and sustainability of our country’s natural products.Bamboo is widely used in many countri...New trends in the area of material improvement are the use of natural nano-charges from renewable biomass,improving the value and sustainability of our country’s natural products.Bamboo is widely used in many countries of the world,although in Argentina,despite being commercialized and exported for the manufacture of wood floors,it goes unnoticed despite having native species.Therefore,researchers identified the native and exotic species present in our country and are working on novel uses.In this context,it is proposed the Argentine Tacuara Cane(Guadua Angustifolia Kunth),endemic plant as a new source of nanocellulosic materials,where stem fibers have been isolated using a green method achieving with yield of 45.9%of cellulose.The cellulose nanofibrils(CNF)were obtained using a green homogenization method.The CNF exhibited web-like long fibrous structure with the diameter of 10-20 nm.The crystallinity was 65.5%,as for the onset temperature of thermal decomposition was 212°C.The nanocellulose isolated from the Tacuara Cane seed fibers has a high potential to be used as a new source of cellulose-based nanofiller for the reinforcement of bionanocomposite films.展开更多
文摘Two distinct lignocellulosic fractions(rind and core)can be obtained through a physical separation of sugarcane stalks.Although presenting differences in morphology,both fractions can be employed to produce pulps and papers.The pulps and paper sheets produced from the core and rind fractions were characterized by their chemical composition,physical properties and mechanical properties.The pulps obtained from the core presented a higher amount of fines,lower drainage ability and rendered denser and stiffer sheets.The pulps from the rind,which have a higher content of fibers and higher degree of polymerization,produced sheets with higher air permeability and water absorption.Both paper sheets presented mechanical and physical properties comparable to commercial papers and papers from different cellulosic sources.The different properties exhibited by the papers produced from each fraction allow their use for distinct purposes,and expands the opportunities in the context of sugarcane biorefinery.
文摘New trends in the area of material improvement are the use of natural nano-charges from renewable biomass,improving the value and sustainability of our country’s natural products.Bamboo is widely used in many countries of the world,although in Argentina,despite being commercialized and exported for the manufacture of wood floors,it goes unnoticed despite having native species.Therefore,researchers identified the native and exotic species present in our country and are working on novel uses.In this context,it is proposed the Argentine Tacuara Cane(Guadua Angustifolia Kunth),endemic plant as a new source of nanocellulosic materials,where stem fibers have been isolated using a green method achieving with yield of 45.9%of cellulose.The cellulose nanofibrils(CNF)were obtained using a green homogenization method.The CNF exhibited web-like long fibrous structure with the diameter of 10-20 nm.The crystallinity was 65.5%,as for the onset temperature of thermal decomposition was 212°C.The nanocellulose isolated from the Tacuara Cane seed fibers has a high potential to be used as a new source of cellulose-based nanofiller for the reinforcement of bionanocomposite films.
