Highly-efficient isolation of cellulose microfiber from rice straw via gentle low-temperature phase transition

Enhancing the Mechanical Properties of Biodegradable Poly(lactic acid) Fibers through Melt Spinning with Cellulose Propionate from Rice Straw

“…Additionally, a newly formed crystalline peak was observed at 12.5° in CMF. These observations suggested that the crystal structure of RS in CMF transformed from cellulose I to cellulose II during the LTPT treatment …”

“…The crystal diffraction peaks of RS appear at 2θ = 14.7, 16.3 and 22.0°, representing the 101, 101, and 002 diffraction planes, respectively, indicating that the cellulose in RS belonged to cellulose type I. 23 However, in CMF, the crystal diffraction curve exhibited significant differences compared to RS. The crystallization peaks at 14.7 and 16.3°disappeared, and the peaks at 22.0°shifted to 20.3 and 21.8°.…”

“…The XRD results revealed notable changes in the crystallinity of RS, CMF, B-CMF, and CP (Figure ). The crystal diffraction peaks of RS appear at 2θ = 14.7, 16.3 and 22.0°, representing the 101, 101, and 002 diffraction planes, respectively, indicating that the cellulose in RS belonged to cellulose type I . However, in CMF, the crystal diffraction curve exhibited significant differences compared to RS.…”

“…CMF was prepared from RS by referring to our previous low-temperature phase transition (LTPT) method. 23 In brief, the cleaned rice straw fiber (RSF) was added to a 9 wt % NaOH solution and heated to 90 °C for 1 h. The mixture was cooled to −12.5 °C under mechanical stirring in a lowtemperature reactor and the mixture was reacted for 4 h. The product CMF was purified by vacuum filtration with distilled water six times. The prepared CMF was then bleached with NaClO to obtain a bleached cellulose microfiber (B-CMF).…”

Synthesis of Sodium Carboxymethyl Cellulose/Poly(acrylic acid) Microgels via Visible-Light-Triggered Polymerization as a Self-Sedimentary Cationic Basic Dye Adsorbent

“…40 The stretching vibrations of O−H, C−H, C−O, and CO of pure CMC could be observed at 3259, 2919, 1019, and 1586 cm −1 , respectively. 41,42 Compared with CMC, the spectrum of CMC/PAA microgels showed an apparent absorption peak at approximately 1698 cm −1 , indicating the presence of COO − in the microgel structure. In addition, the peaks at 2924 and 1021 cm −1 were assigned to C−H and C−O stretching vibrations, respectively.…”