نتایج جستجو برای: polyanionic cellulose
تعداد نتایج: 30592 فیلتر نتایج به سال:
X-ray and neutron fiber diffraction has been used to study cellulose as it is converted from its naturally occurring crystal phase, cellulose I, to an activated crystal phase, cellulose IIII, by ammonia treatment. The detailed crystal structures determined for cellulose Iβ, an intermediate ammonia-cellulose I complex, and cellulose IIII, reveal a structural transition pathway: hydrogen bonded s...
The preparation of cellulose nanostructures is considered in this paper. Cellulose nanoparticles(nano cellulose) were extracted from cinnamon for the first time. The chemically-induceddestruction strategy based on controlled strong acid hydrolysis treatment was used for dissolutionof lignin and fragmentation of cellulose to nano sized structure. The products werecharacterized by scanning electr...
Background: Nanomicrobial cellulose is an important biopolymer with a three-dimensional structure that is produced by some microorganisms and has been widely used in medicine. One of the unique properties of microbial cellulose is its very high water absorption, which can be used to produce modern wound dressings. But after drying, it’s three-dimensional structure collapses and the amount of wa...
Because developed neural cells are no longer regenerative and proliferative, achieving regenerations by using induced pluripotent stem (IPS cells) for nerve diseases have recently attracted much attention. Since the IPS cells’ growth differentiation can be manipulated different physical chemicals cues, scaffolds combining beneficial nanostructures extracellular matrix may become an ideal interf...
New bionanocomposite proton exchange membranes were prepared from sulfonated polybenzimidazole (s-PBI) and various amounts of sulfonated ZnO/cellulose nanohybrids (ZnO/cellulose-SO3H). The use of ZnO/cellulose-SO3H compensates for the decrease in ion exchange capacity of membranes observed when non-sulfonated nano-fillers are utilized. The strong –SO3H/–SO<su...
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