2篇
您的检索式：作者名="Karla Ramirez"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Biocomposite Films of Polylactic Acid Reinforced with Microcrystalline Cellulose from Pineapple Leaf Fibers显示文摘Poly(lactic acid)(PLA)composite films reinforced with microcrystalline cellulose(MCC)extracted from pineapple leaf fibers(PALF)were prepared by a solution casting procedure.In an attempt to improve the interaction between PLA and cellulose,two approaches were adopted;first,poly(ethylene glycol)(PEG)was used as a surfactant,and second,the cellulosic fibers were pre-treated using tert-butanol(TBA).Lignocellulosic and cellulosic substrates were characterized using Fourier transform infrared(FTIR),wide-angle X-ray scattering(WAXS),and thermogravimetrical analysis(TGA).MCC from PALF showed good thermal stability,left few residues after decomposing,and exhibited high crystallinity index.Mechanical,thermal and thermomechanical properties of the PLA composites were also evaluated.Multiple PLA endotherms were observed in composites with TBA-treated MCC due to crystal nucleation effects.The ultimate tensile strain values for all composites were lower than that of the pristine PLA.However,4 wt.%MCC content provided balanced engineering properties in terms of static and dynamic tensile properties. | Galia Moreno Karla Ramirez Marianelly Esquivel Guillermo Jimenez | 2019 | Journal of Renewable Materials2019，7，1： | 1 |
| 2 | Isolation and Characterization of Nanocellulose Obtained from Industrial Crop Waste Resources by Using Mild Acid Hydrolysis显示文摘Cellulose,microcrystalline cellulose and nanocellulose were prepared from three agricultural waste resources:pineapple leaf(PALF),banana rachis(BR),and sugarcane bagasse(SCB).Each waste resource was first converted into microcrystalline cellulose which was subsequently converted into cellulose nanoparticles by using mild(30%w/v)and strong(60%w/v)sulfuric acid concentrations for extraction.Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),and thermogravimetric analysis(TGA)were used to characterize each waste resource and extracted cellulosic materials.Furthermore,nanocelluloses were studied by zeta potential,size analysis,and transmission electron microscopy(TEM).Cellulose nanowhiskers were successfully obtained and isolated with a 33%average yield by applying a mild acid treatment.Substrates BR and SCB proved to be more promising agricultural waste resources in terms of their crystalline cellulosic content and properties. | Galia Moreno Karla Ramirez Marianelly Esquivel Guillermo Jimenez | 2018 | Journal of Renewable Materials2018，6，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员