A bioplastic with high strength constructed from a cellulose hydrogel by changing the aggregated structure

Highly rate and cycling stable electrode materials constructed from polyaniline/cellulose nanoporous microspheres

“…The CM displayed characteristic chemical shifts at 106.1, 88.4, 75.3, and 63.3 ppm, respectively, assigning to the C1, C3, C2 and C6 of cellulose Ⅱ. 18 As a result of the possible hydrogen-bond interactions between the phytic acid with the -OH of cellulose and the -NH of PANI, the chemical shifts of C2, C3 and C6 for cellulose in the PANI/PA/CM shifted to upfield by about 1 ppm as well as the intensity of the shoulder peak for the C4 carbon (amorphous regime) significantly enhanced, compared with the CM, suggesting the weakening of the hydrogen bonding of cellulose themselves by the formation of new hydrogen bonds between the three components. Furthermore, 13 P NMR spectrum of the PANI/PA/CM ( Figure S4b) was compared with that of the pure phytic acid ( Figure S4a).…”

Construction of Fluorescent Cellulose Biobased Plastics and their Potential Application in Anti-Counterfeiting Banknotes

“…Therefore, the fl uorescent cellulose biobased plastic could be used well at much higher temperatures than common synthetic polymers. [ 31 ] The photoluminescent (PL) spectra of the fl uorescence dyes, RhCBP and FCBP are shown in Figure 3 c. It can be seen that emission peaks for the RhCBP and FCBP were exhibited at 584 and 517 nm, respectively. The sharp peaks of the emission spectra revealed that the RhB and fl uorescein dye molecules were uniformly dispersed in the cellulose matrix.…”

“…The chemical shifts of the C 1 carbon (106 ppm), C 4 carbon (89 ppm, crystalline; ∼83 ppm, amorphous), C 2,3,5 carbons (72-75 ppm), and C 6 carbon (63 ppm, crystalline; 61 ppm, amorphous) indicated that no chemical reaction occurred between cellulose and the fl uorescent dye molecules, and that a strong interaction existed between cellulose and the fl uorescent dye molecules through hydrogen bonding. [ 31 ] We further examined the chemical state of the fl uorescent dye molecules in the cellulose matrix by X-ray photoemission spectroscopy (XPS) (see Figure S1 in the Supporting Information). Strong peaks for the C 1s bond appeared at 287.4 and 280.3 eV of RhCBP, indicating the existence of C-O and C=O.…”

“…Therefore, the biobased plastic was fabricated from the cellulose hydrogels through the transition of its aggregated structure by simple hot-pressing. [ 31 ] To evaluate thermal stability in practical applications, we examined the thermal decomposition behaviors of the fl uorescent cellulose biobased plastics by thermogravimetric analysis (TGA) under a nitrogen atmosphere (Figure 3 b). TGA curves of the RhCBP and FCBP exhibited the characteristic thermal decomposition of cellulose at 300∼350 °C, irrespective of the fl uorescent dye molecules.…”

“…[ 30 ] In our previous work, a new class of cellulose bioplastics with high strength and fl exibility, and a low coeffi cient of thermal expansion were directly fabricated by hot-pressing cellulose hydrogels, which were prepared from cellulose solution in an NaOH/urea aqueous system with cooling, leading to a change in the aggregated structure. [ 31 ] The cellulose biobased plastic sheet appeared to show plastic deformation during the process of hot-pressing, and was fabricated from biomass, so we named the material as a new bioplastics class, cellulose bioplastics. This provided the motivation for us to develop fl uorescent cellulose bioplastics by introducing luminescent dyes into cellulose hydrogels through hydrogen bonding or ionic bonding interactions.…”