Abstract A novel cellulose solvent, 1.5 M NaOH/0.65 thiourea aqueous solution, was used to dissolve cotton linters having a molecular weight of 10.1 × 10 4 prepare solution. Regenerated (RC) films were obtained from the solution by coagulating with sulfuric acid (H 2 SO ) concentration 30 wt %. Solubility cellulose, structure, and mechanical properties RC examined infrared spectroscopy, X‐ray diffraction, scanning electron microscopy, 13 C NMR, tensile tests. NMR analysis indicated that...

Abstract Poly( ε ‐caprolactone) (PCL) was grafted to the surface of starch nanocrystals (StN) via microwave‐assisted ROP. The resultant nanoparticles were then incorporated into a poly(lactic acid) matrix produce fully‐biodegradable nanocomposites with good mechanical properties. A loading level 5 wt.‐% StN ‐g‐ PCL resulted in simultaneous enhancements strength and elongation. self‐aggregated as rubbery microparticles enhance elongation by ca. 10‐fold over that neat PLA. Meanwhile, chains...

Rapid urbanization has exacerbated the dual challenge of mitigating water pollution and reducing greenhouse gas (GHG) emissions. The present study offers insights into actual role urban domestic wastewater treatment systems by shedding light on their capacity to act as GHG emitters. We introduce a modelling framework calculate emissions from in China over past two decades. Our analysis showed that treated volume increased 4.5 times, but also 2.9 times. annual were -on average- nearly 60 Tg...

Effect of the degree acetylation (DA) on gelation behaviors addition sodium carbonate for native and acetylated konjac glucomannan (KGM) samples with a DA range from 1.38 to 10.1 wt % synthesized using acetic anhydride in presence pyridine as catalyst was studied by dynamic viscoelastic measurements. At fixed alkaline concentration (CNa), both critical times (tcr) plateau values storage moduli ( ) KGM gels increased increasing DA, while at ratio concentrations (CNa/DA), similar tcr...

ABSTRACT Ammonium polyphosphate (APP) and intumescent flame‐retardant di‐(3‐amin‐opropyltriethoxysilane) spirocyclic pentaerythritol diphosphate (PDAP) were prepared as an flame retardant with synergistic effect, polylactic acid (PLA) was modified by melt blending. The retardancy of PLA/PDAP/APP evaluated limiting oxygen index (LOI), vertical combustion test (UL‐94), cone calorimetry (CCT), the thermal stability studied thermogravimetric analysis thermogravimetry‐Fourier transform infrared...

Blend films were prepared by blending 7 wt % konjac glucomannan (KGM) aqueous solution with 2 chitosan (CH) in acetate and dried at 40°C for 4 h to obtain the transparent films. Their structure properties studied infrared (IR), wide-angle X-ray diffraction (WAXD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential thermal (DTA). Crystallinities of blend decreased increase glucomannan. The thermostability, tensile strength, breaking elongation dry state...

Semiinterpenetrating polymer networks (semi-IPNs) were synthesized from castor oil-based polyurethane (PU) and 20 wt % nitrokonjac glucomannan (NKGM) with weight-average molecular weights (Mw) 2.86 × 104 to 14.1 104. Results the dynamic mechanical analysis, differential scanning calorimetry, wide-angle X-ray diffraction, ultraviolet spectrometer showed that semi-IPNs have a single broad α-relaxation peak, one glass transition, higher optical transmittance (Tr) in wavelength range of 400−800...

Novel blend films of konjac glucomannan (KGM) with gelatin were prepared by using the solvent-casting technique. Transparent obtained in all blending ratios two polymers. The structure and physical properties investigated Fourier transform IR, wide angle X-ray diffraction, thermogravimetric analysis, differential thermal scanning electron microscopy (SEM), strength tests. results indicated that intermolecular interactions between KGM occurred caused hydrogen bonding largely depended on...

In order to enhance the mechanical properties of konjac glucomannan film in dry state and research application on food preservation domain, blend transparent was prepared by blending 3 wt % sodium alginate aqueous solution with 4.5 dried at 40oC for 4 h. The structure films were studied infrared, wide angle X-ray diffraction, scanning electron microscopy, differential thermal analysis. Crystallinities increased increase alginate. tensile strength breaking elongation obviously higher than...

Abstract A novel mono‐component intumescent flame retardant(m‐IFR), called poly‐(spirocyclic pentaerythritol bisphosphonate‐1,3,5‐triazine‐O‐bicyclic phosphate) (PSTBP) was synthesized and characterized. PSTBP used in polypropylene (PP) to obtain PP/PSTBP mixture whose retardancy, thermostability, water resistance were studied by limiting oxygen index (LOI), vertical burning test (UL‐94 V) thermogravimetric analysis (TGA). In addition, flame‐retardant mechanism of the investigated. The...

Due to the polyether structure on main chain, alkali resistance of quaternized poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) anion exchange membranes (AEMs) needs be improved. Through Williamson etherification reaction, we synthesized a new type PPO-based AEM with piperidine cation side which has good ionic conductivity (63.5 mS cm–1 at 80 °C). being non-N-bonded, it resistance, and loss is less than 10% when immersed in 1 mol L–1 KOH solution for 480 h. In addition, also prepared other two...

In this work, a novel quaternized poly(fluorene piperidine)(PBBP) without alkaline labile CO bonds is designed and prepared successfully via acid-catalyzed polycondensation reactions. The PBBP-based anion-exchange membranes crosslinked by DBMHDA((AEM-X,X = 1,2,3), BAPTES(AEM-X, X 4,5,6), BPPO (AEM-7) respectively are characterized, the properties of them analyzed compared. By crosslinking, AEM-3 AEM-6 showed obvious microphase separation, resulting in improvement IEC ionic conductivity...