High enhancement of the hydrolysis rate of cellulose after pretreatment with inorganic salt hydrates

Lara‐Serrano, Marta; Morales‐delaRosa, Silvia; Campos‐Martín, Jose M.; Fierro, J.L.G.

doi:10.1039/d0gc01066a

Cited by 42 publications

(13 citation statements)

References 42 publications

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“…All samples were mounted on the same sample holder with the scanning range from 2θ = 10 to 60° at a sweep speed of 10° min –1 . The crystallinity index (CrI) of cellulose samples was estimated according to Segal’s method , CrI = I 200 − I am I 200 where I 200 is the maximum intensity of the principal peak (200) lattice diffraction (at 22.9 for cellulose I, 21.8 for cellulose II, and 20.2 for amorphous cellulose), and I am of cellulose I and cellulose II were the minimum intensity between planar reflections (110)/(200) and (1–10)/(110), respectively (at 18° for cellulose I, at 16° for cellulose II). In order to distinguish the distinct types of crystalline cellulose and disordered cellulose, the solid-state NMR experiments of cellulose and regenerated cellulose structure were performed on a Bruker AVANCE NEO 400 WB.…”

Section: Methodsmentioning

confidence: 99%

High-Efficiency and Recyclable Green Molten Salt Hydrate Solvent for Cellulose Hydrogels with High Conductivity and Freeze Tolerance

Miao

Liu

Man

et al. 2023

ACS Sustainable Chem. Eng.

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Cellulose, as a sustainable biomass material, has aroused wide attention and has been extensively employed in functional biomaterials. However, due to the strong intra/intermolecular interactions, the dissolution problem has significantly limited its applications. Although different kinds of solvents have been developed, most of them still cannot equilibrate dissolution, recyclability, and functional material preparation, simultaneously. In this work, an efficient and recyclable green solventmolten salt hydrate (calcium chloride hexahydrate-lithium chloride, CHLH)was prepared with excellent dissolving ability (high solubility of 7.0 wt %) for cellulose at a low dissolution temperature. Moreover, the CHLH showed good stability and storage properties. The dissolved cellulose could be stored in a solid state at a wide range of temperatures (<65 °C) for more than 3 months while remaining stable. Meanwhile, CHLH exhibited excellent recycling properties. After 5 dissolving–recovering cycles, the recycled CHLH still maintained stable dissolution performance and a high recovery of 92%. More importantly, the advantages of CHLH made the prepared cellulose hydrogel integrate good flexibility, ionic conductivity, and freezing tolerance. When used as a strain sensor, it could not only detect body movements but also identify the motion direction, which would have broad application prospects in flexible electronic devices.

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Section: Methodsmentioning

confidence: 99%

High-Efficiency and Recyclable Green Molten Salt Hydrate Solvent for Cellulose Hydrogels with High Conductivity and Freeze Tolerance

Miao

Liu

Man

et al. 2023

ACS Sustainable Chem. Eng.

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“…For example, ZnBr 2 •4H 2 O was investigated in the hydrolysis of cellulose to sugars (e.g., glucose), exhibiting the best performance such as a conversion of 88%, a yield of 80%, and a selectivity of 91%. 31 Moreover, after the 2 nd cyclic test using recovered ZnBr 2 •4H 2 O, the recovery efficiency of ZnBr 2 •4H 2 O, the conversion of cellulose, and the yield and selectivity of glucose were not obviously decreased, 31 indicating that ZnBr 2 •4H 2 O makes this technical route promising and practical for large-scale applications.…”

Section: Msmtc Of Biomass Into Chemicals and Fuelsmentioning

confidence: 99%

Research advancement in molten salt-mediated thermochemical upcycling of biomass waste

Shen

Yuan

2023

Green Chem.

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“…This was due apart from chlorophyll, other components in the leaves could also bind to Zn. These components include phenolic components [23]- [26], flavonoids [27], cellulose [28], [29], and proteins [30]. The sambiloto simplicia powder formed a metallochlorophyll complex, which was less efficient than the extract due to competition in the binding of Zn 2+ .…”

Section: Bound Zn Contentmentioning

confidence: 99%

The Effects of Metallochlorophyll Formation and Pretreatment on Color, Chlorophyll Content, Total Phenolic Content, and Antioxidant Activity of Sambiloto (Andrographis paniculata) Simplicia Powder

Suryani¹,

Fitri²,

Evlin³

et al. 2023

ujar

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This research aimed to produce sambiloto simplicia which is rich in chlorophyll and Zn through the process of forming metallochlorophyll by blanching either fresh or dry leaves. Sambiloto simplicia powder is produced through several stages including sorting, boiling in Zn acetate medium (0, 300, 400, 500 ppm), draining, drying, and grinding. The types of materials used are dry and fresh leaves material. The sambiloto simplicia powder was analyzed for chlorophyll content, bound Zn content, total phenolic content (TPC), and total flavonoid content (TFC). Analysis of the antioxidant activity of sambiloto simplicia powder included lipid peroxidation inhibition (LPI) activity and DPPH radical scavenging capacity. The results show that the greater Zn acetate concentration, the green color intensity, chlorophyll content, bound Zn content, and total phenolic and flavonoid content of sambiloto simplicia powder increased, but at concentrations more than 300 ppm in dry leaves and more than 400 ppm in fresh leaves it decreased again. Simplicia powder from dry leaves by blanching at a concentration of 300 ppm and fresh leaves material at a concentration of 400 ppm had the highest contents of chlorophyll, TPC, TFC, and the ability to inhibit lipid peroxidation. At a concentration of Zn acetate of 300 ppm, the simplicia powder from the dry leaves had a higher RSA and LPI than the fresh leaves, but at a concentration of 400 ppm, the LPI from the fresh leaves was higher. The sambiloto simplicia powder could be a natural source of antioxidants as it is high in zinc.

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High enhancement of the hydrolysis rate of cellulose after pretreatment with inorganic salt hydrates

Abstract: Cellulose treatment dissolution/precipitation in inorganic salt hydrates produces a dramatic morphology change that yields a reactivity improvement respect the untreated for transformations.

Cited by 42 publications

References 42 publications

High-Efficiency and Recyclable Green Molten Salt Hydrate Solvent for Cellulose Hydrogels with High Conductivity and Freeze Tolerance

High-Efficiency and Recyclable Green Molten Salt Hydrate Solvent for Cellulose Hydrogels with High Conductivity and Freeze Tolerance

Research advancement in molten salt-mediated thermochemical upcycling of biomass waste

The Effects of Metallochlorophyll Formation and Pretreatment on Color, Chlorophyll Content, Total Phenolic Content, and Antioxidant Activity of Sambiloto (Andrographis paniculata) Simplicia Powder

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