A new method for determination of lignocellulose crystallinity from XRD data using NMR calibration

Vydrina, Irina; Малков, А. В.; Vashukova, Ksenia; Tyshkunova, Irina V.; Mayer, Lyudmila; Faleva, Anna V.; Shestakov, Semyon; Новожилов, Е. В.; Чухчин, Д. Г.

doi:10.1016/j.carpta.2023.100305

Cited by 11 publications

(7 citation statements)

References 30 publications

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“…Moreover, several weak peaks at 2θ = 8, 13, and 32° probably correspond to highly ordered long alkyl chains. The crystallinity percentage was calculated using the equation below % crystalline = I 002 − I am I 002 × 100 where I 002 refers to the maximum intensity of the (002) lattice diffraction and I am represents the diffraction intensity at 2θ = 20.4°.…”

Section: Resultsmentioning

confidence: 99%

Physicochemical Properties and Release Study of Antimetabolite-Incorporated Stearoyl Chitosan

Marlina,

Misran

2023

ACS Omega

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Stearoyl chitosan (SC), derived from the acylation of chitosan, contributes to the efficiency of drug delivery systems because of its structure, which accommodates the drug in a particle. Nonetheless, its role in chemotherapy has been largely unexplored. The present study involves the synthesis of stearoyl chitosan through the reaction of depolymerized chitosan with stearoyl chloride under mild reaction conditions. The resulting compound was subjected to structural analysis utilizing Fourier-transform infrared (FTIR) spectroscopy, 1H NMR, and X-ray diffraction (XRD) spectroscopy. The dispersion of SC molecules in phosphate-buffered saline (PBS) forms SC nanoparticles. The best dispersion of SC in the solution was achieved at a 1:60 chitosan-to-stearoyl chloride weight ratio. Three antimetabolite drugs, methotrexate, pemetrexed, and raltitrexed, were selected to examine the loading efficacy of SC. Pemetrexed had the highest drug-loading value of 36.8% among the three antimetabolites incorporated into SC, along with an encapsulation efficiency of 85.1%. The size of SC loaded with antimetabolites ranged from 225 to 369 nm, and their spherical form was verified via a transmission electron microscope. The in vitro release study showed that SC demonstrated controlled drug release, suggesting that SC nanoparticles have significant promise as a delivery strategy for chemotherapy.

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Section: Resultsmentioning

confidence: 99%

Physicochemical Properties and Release Study of Antimetabolite-Incorporated Stearoyl Chitosan

Marlina,

Misran

2023

ACS Omega

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“…β-glycoside linkage of cellulose, with an absorbance spectrum around 1320-897 cm1 (Bhunia et al, 2023). In addition, FT-IR is also used to determine the crystallinity structure, namely at peaks of 700-1500 cm1 as a sensitive measure of crystalline cellulose structure (Vydrina et al, 2023). C-O stretching can be seen in the 950-1200 cm1 range (Pirah et al, 2022).…”

Section: Morphological Observation Of Coconut Dregs By Scanning Elect...mentioning

confidence: 99%

“…Essentially, the diffractogram is conditionally separated into two sections (phases), with one crystalline and the other amorphous (Vydrina et al, 2023). Figure 8.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

“…Lignocellulose is the main component of the plant cell wall that belongs to polysaccharide compounds and is available in the world (Vydrina et al, 2023). Plant cell walls are divided into three layers: primary walls that enclose growing cells or cells with the potential to grow, secondary walls that include thickened lignin structures and specialized cells that surround them, such as fiber cells, and intercellular layers.…”

Section: Introductionmentioning

confidence: 99%

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Identification of Availability and Lignocellulosic Properties in Coconut Dregs Waste

Murtius,

Argo,

Nurika

et al. 2024

J. appl. agricultural sci. technol.

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Agricultural waste, including coconut pulp, contains lignocellulose and is a very important, renewable and sustainable industrial raw material. Many of the food, textile, pharmaceutical, paint and resin, agrochemical, oil processing, and other sectors utilize lignocellulosic derivatives. The objectives of this study were to determine the availability of coconut pulp in Padang City-West Sumatra, analyse the lignocellulosic components contained and cell surface morphology, and observe the chemical elements in coconut pulp waste. An exploratory approach was used in this study to achieve these objectives. The results showed that there were 98 coconut milk entrepreneurs spread across traditional markets in Padang City, West Sumatra. Every day the coconut milk squeeze business examined produces ± 1.18 tonnes of coconut pulp. Coconut waste also contains 47.18% cellulose, 10.58% lignin, and 12.10% hemicellulose. Based on the XRD results, the crystal size of coconut pulp obtained from XRD observation is 11.8 nm.

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“…The fly ash acted as a mineral powder in geopolymer concrete and it was partially replaced by GGBS. GGBS was added by replacing 50% of fly ash by its weight to make geopolymer concrete at room temperature and not only to improve its strength (Arfelis et al 2023;Vydrina et al 2023). Also, to reduce the pores and internal micro cracks, natural MCC was added.…”

Section: Introductionmentioning

confidence: 99%

Impact of coconut husk microcrystalline cellulose on the properties of geopolymer lightweight concrete

Rajalekshmi,

Arul Jose

2024

BioRes

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Geopolymer composite is an alternative to ordinary Portland cement. It has potential to avoid CO2 emissions to the atmosphere and to save raw materials during its manufacture. Flyash-based geopolymer concrete is altered by adding ground granulated bast-furnace slag (GGBS) to improve its fresh and hardened properties. Thermal ash aggregate is used as coarse aggregate to reduce geopolymer concrete density, improve strength, and conserve natural aggregate. Along with this matrix, coconut husk microcrystalline cellulose (MCC) is added to enhance its performance. In a M40 grade flyash and GGBS-based geopolymer concrete, MCC was used to replace fly ash at 1% to 5% levels. The geopolymer composites were tested for slump, compression, split tensile, water absorption, and acid resistance to determine the way coconut husk MCC interacts with lightweight concrete. An inclusion of 3% MCC with geopolymer composites improved 2% slump, 6% of compressive and split tensile strength. About 1.6% of water absorption was reduced in GPC matrix with 3% of MCC. Meanwhile 3% of MCC in geopolymer concrete improved, 4% of weight and 7% of strength under acid exposure. The research strongly supported utilizing MCC in geopolymer concrete to render it more sustainable and eco-friendlier.

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A new method for determination of lignocellulose crystallinity from XRD data using NMR calibration

Cited by 11 publications

References 30 publications

Physicochemical Properties and Release Study of Antimetabolite-Incorporated Stearoyl Chitosan

Physicochemical Properties and Release Study of Antimetabolite-Incorporated Stearoyl Chitosan

Identification of Availability and Lignocellulosic Properties in Coconut Dregs Waste

Impact of coconut husk microcrystalline cellulose on the properties of geopolymer lightweight concrete

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