Synthesis of hydroxyethyl cellulose from industrial waste using microwave irradiation

Orhan, Burcu; Ziba, Cengiz Ayhan; Morcali, Mehmet Hakan; Dolaz, Mustafa

doi:10.1016/j.serj.2018.07.004

Cited by 38 publications

(16 citation statements)

References 19 publications

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“…2 a) showed that the hand rub samples based on carbomer and hydroxyethylcellulose had a filamentous structure as confirmed by optical microscope analysis ( Fig. 2 b), where the lyophilised samples generated small white flakes [32] or uneven transparent film, typical of the derivate of cellulose [33] , respectively. For the other lyophilized polymers (acrylates/C10-30 alkylacrylatecrosspolymer, polyacrylatecrosspolymer-6, poly(methylmethacrylate) and polyquaternium-7) used for hand rubs, different behavior was observed in the function of the used cross linker as reported in the literature [34] , [35] .…”

Section: Resultsmentioning

confidence: 76%

Monitoring of alcohol-based hand rubs in SARS-CoV-2 prevention by HS-GC/MS and electrochemical biosensor: A survey of commercial samples

Majorani

Leoni

Micheli

et al. 2022

Journal of Pharmaceutical and Biomedical Analysis

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Section: Resultsmentioning

confidence: 76%

Monitoring of alcohol-based hand rubs in SARS-CoV-2 prevention by HS-GC/MS and electrochemical biosensor: A survey of commercial samples

Majorani

Leoni

Micheli

et al. 2022

Journal of Pharmaceutical and Biomedical Analysis

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“…Because cellulose is a hygroscopic material, whereas CNH is slightly dispersible in distilled water, OH-bonds were found in a deep stretching around 3340 cm −1 and a weak absorption at 2896 cm −1 . This also explains that the stretching and flexible nature is due to the mediation of OH-molecules binding between CNH and cellulose [22], as shown in figure 13.…”

Section: Resultsmentioning

confidence: 80%

Synthesis of solvent-free conductive and flexible cellulose–carbon nanohorn sheets and their application as a water vapor sensor

Selvam

Nakagawa

Marui

et al. 2020

Mater. Res. Express

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Carbon nanohorns (CNHs) are mixed with cellulose to make freestanding thin-film conductive sheets. CNHs, at different ratios (5, 10, 25, 50 wt%), form composites with cellulose (hydroxyethylcellulose). Freestanding cellulose-carbon nanohorn (CCN) sheets were fabricated using a 100 μm-thick metal bar coater. Surfactants or any other chemical treatments to tailor the surface properties of CNHs were avoided to obtain composite sheets from pristine CNHs and cellulose. Utilizing the hygroscopic property of hydroxyethylcellulose and the electrical conductivity of CNHs paved a path to perform this experiment. The synthesis technique is simple, and the fabrication and drying of the sheets were effortless. As the loading concentration of CNH increased, the resistance, flexibility, and strength of the CCN composite sheets decreased. The maximum loading concentration possible to obtain a freestanding CCN sheet is 50 wt%. The resistance of the maximum loading concentration of CNH was 53 kΩ. The response of the CCN sheets to water vapor was 4 s and recover time was 13 s, and it is feasible to obtain a response for different concentrations of water vapor. High-resolution transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, resistance measurement, tensile strength measurement, and thermogravimetric analysis were used to investigate the mechanical, morphological, electrical, and chemical properties of the CCN sheets.

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“…The bands around 1204 and 1112 cm –1 are allocated, respectively, to the −CH and −CO in plane bending of AGU. In particular, the absorption band at 1112 cm –1 is related to −CO antisymmetric bridge stretching, and the band at 885 cm –1 derives from β-glucosidic linkages between the glucose units in the cellulose structure . The bands at 1227 and 1306 cm –1 are attributed to the symmetric and asymmetric stretching vibrations, respectively, of the carboxylic groups of the surface of QDs which are in the form of carboxylate anions COO – , attending to the buffer used (PBS 10 mM, pH 6.4) (Figure , light blue, yellow, pink, and red). , The presence of OH stretching is also evidenced by the broad peak around 3307 cm –1 .…”

Section: Resultsmentioning

confidence: 99%

Imprinted Fluorescent Cellulose Membranes for the On-Site Detection of Myoglobin in Biological Media

Piloto

Ribeiro

Rodrigues

et al. 2021

ACS Appl. Bio Mater.

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In this work, the conjugation of molecularly imprinted polymers (MIPs) to quantum dots (QDs) was successfully applied in the assembly of an imprinted cellulose membrane [hydroxy ethyl cellulose (HEC)/MIP@QDs] for the specific recognition of the cardiac biomarker myoglobin (Myo) as a sensitive, user-friendly, and portable system with the potential for point-of-care (POC) applications. The concept is to use the MIPs as biorecognition elements, previously prepared on the surface of semiconductor cadmium telluride QDs as detection particles. The fluorescent quenching of the membrane occurred with increasing concentrations of Myo, showing linearity in the interval range of 7.39−291.3 pg/mL in a1000-fold diluted human serum. The best membrane showed a linear response below the cutoff values for myocardial infarction (23 ng/mL), a limit of detection of 3.08 pg/mL, and an imprinting factor of 1.65. The incorporation of the biorecognition element MIPs on the cellulose substrate brings an approach toward a portable and user-friendly device in a sustainable manner. Overall, the imprinted membranes display good stability and selectivity toward Myo when compared with the nonimprinted membranes (HEC/NIP@QDs) and have the potential to be applied as a sensitive system for Myo detection in the presence of other proteins. Moreover, the conjugation of MIPs to QDs increases the sensitivity of the system for an optical label-free detection method, reaching concentration levels with clinical significance.

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Synthesis of hydroxyethyl cellulose from industrial waste using microwave irradiation

Cited by 38 publications

References 19 publications

Monitoring of alcohol-based hand rubs in SARS-CoV-2 prevention by HS-GC/MS and electrochemical biosensor: A survey of commercial samples

Monitoring of alcohol-based hand rubs in SARS-CoV-2 prevention by HS-GC/MS and electrochemical biosensor: A survey of commercial samples

Synthesis of solvent-free conductive and flexible cellulose–carbon nanohorn sheets and their application as a water vapor sensor

Imprinted Fluorescent Cellulose Membranes for the On-Site Detection of Myoglobin in Biological Media

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