Effect of ultrasonication on lubrication performance of cellulose nano-crystalline (CNC) suspensions as green lubricants

Zakani, Behzad; Entezami, Sohrab; Grecov, Dana; Salem, Hayder; Sedaghat, Ahmad

doi:10.1016/j.carbpol.2021.119084

Cited by 22 publications

(17 citation statements)

References 56 publications

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“…Furthermore, additives such as nanoparticles and other chemical substances are needed to match their properties with conventional lubricants. The addition of nanoparticles can increase the friction coefficient because these nanoparticles can cover the tiniest cracks in the lubricated material [6]. Vegetable oil based biolubricants with nanoparticle additives can reduce the friction coefficient by 15% compared to the base fluid [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of sonication to the stability properties of carboxymethyl cellulose/uncaria gambir extract water-based lubricant

et al. 2022

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This study examined the effect of sonication on FTIR and stability at various temperatures in water-based lubricants with a mixture of Carboxymethyl Cellulose (1wt%) and Uncaria Gambir extract (1wt% and 2wt%). The sample was prepared by mixing the two materials into distilled water using a magnetic stirrer and sonicator with time variations of 5 and 10 minutes. Before mixing, the Uncaria Gambir extract solution with water is first centrifuged to remove the dregs in the Uncaria Gambir extract powder. Stability was carried out in an open room (28oC), drying oven (50oC), and refrigerator (5oC). The stability test results showed that the mixture of Carboxymethyl Cellulose and Uncaria Gambir had good stability at all temperatures after sonication for a short duration. The longer sonication duration could fuse the fibrils of Carboxymethyl Cellulose, leading to increasing particle size. FTIR results also show that there is no chemical reaction that occurs. After adding the gambier, there was a new peak at wave 800-1300 cm-1, corresponding to the gambier. The results of this study indicate that the Carboxymethyl Cellulose and Uncaria Gambir solution can be a potential lubricant additive. The Carboxymethyl Cellulose can be a viscosity modifier, while Uncaria Gambir extract for corrosion inhibitor.

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Section: Introductionmentioning

confidence: 99%

Effect of sonication to the stability properties of carboxymethyl cellulose/uncaria gambir extract water-based lubricant

et al. 2022

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“…To reduce CNC aggregation, the mixture was ultrasonicated for 4 min with an amplitude of 30% for 5 s on and 2 s off. Ultrasonication can affect size and surface chemistry, , but since all samples received the same treatment, any effects on subsequent modifications should have been the same for all samples. The mixture was then placed under magnetic stirring for 2 h at room temperature.…”

Section: Methodsmentioning

confidence: 99%

Antibody Immobilization on Sulfated Cellulose Nanocrystals

et al. 2023

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Exploiting cellulose nanocrystals’ high aspect ratio and tailorable surface for immunological biosensors has been hindered by the relatively limited research on using commonly available sulfated cellulose nanocrystals (CNCs) for antibody immobilization and by the low hydrolytic stability of dried assemblies produced from sulfated CNCs. Herein, we report a reaction scheme that enables both hydrolytic stability and antibody immobilization through 3-aminopropyl-triethoxysilane and glutaric anhydride chemistry. Immobilization was demonstrated using three model antibodies used in the detection of the cancer biomarkers: alpha-fetoprotein, prostate-specific antigen, and carcinoembryonic antigen. Thermogravimetric analysis coupled with Fourier-transform infrared spectroscopy provided evidence of CNC modification. Quartz crystal microbalance with dissipation monitoring was used to monitor binding during each step of the immobilization scheme as well as binding of the corresponding antigens. The general reaction scheme was tested using both aqueous CNC dispersions and CNC films. Film modification is slightly simpler as it avoids centrifugation and washing steps. However, modifying the dispersed CNCs provides access to their entire surface area and results in a greater capacity for antigen binding.

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“…Biological plywood and human compact bones are other typical liquid crystal analogues, whose cellulose and collagen fibres align in a chiral liquid crystalline-like hierarchy, known as the Bouligand architecture (Cowin, 2004;Lagerwall et al, 2014;Gutierrez and Rey, 2017). Cellulose-based liquid crystals have various applications (Habibi et al, 2010;Li et al, 2021) such as serving as a steam engine driven by humidity (Geng et al, 2013), biofibres' surface morphology sensor (Aguirre et al, 2016), piezoelectric sensor (Csoka et al, 2012;Rajala et al, 2016), water-based lubricant (Noroozi et al, 2014;Shariatzadeh and Grecov, 2019;Zakani et al, 2022), inducing long-range order in a semiconducting polymer (Risteen et al, 2017). The unique spatiotemporal and structural colours (Chagas et al, 2020;Saraiva et al, 2020;Silva et al, 2021) makes celluloses a promising optical material (Lagerwall et al, 2014;Ličen et al, 2016;Anyfantakis et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Pattern formation, structure and functionalities of wrinkled liquid crystal surfaces: A soft matter biomimicry platform

Wang

Servio

Rey

2023

Front. Soft. Matter

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This review presents an integrated theoretical and computational characterization and analysis of surface pattern formation in chiral and achiral liquid crystal self-assembly and the mechanical/optical/tribological/tissue engineering surface functionalities that emerge from various wrinkling processes. Strategies to target surface patterns include linear, non-linear, multidirectional and multiscale wrinkling phenomena. The focus of the review is to show the unique surface structure-functionalities that emerge from anisotropic liquid crystal soft matter, eliminating or reducing the need of aggressive solvents, extreme pressure/temperature conditions, erosion and other surface morphing approaches. The surface pattern formation theoretical-modelling- computational results are then connected and validated with actual biological surfaces that are considered solid liquid crystal analogues, such as exocuticles of insects, fish scales, and flowers. A unique feature of the in silico surface pattern formation platform used throughout this review is the generalized liquid crystal shape equation that includes surface anchoring elasticity, membrane elasticity, and stress loads from liquid crystals orientation gradients. Clear characterization of surface shapes, curvatures, roughness, that are behind surface functionalities are introduced and applied to strengthen validation of predictions with actual nature’s surfaces. Wrinkling scaling laws, and the dependence of material properties on morphing mechanisms are elucidated. The predictions capture very well the two-scale wrinkling patterns in tulips, wrinkling gradients that display water sensor capabilities, egg carton shapes in rose petals and their potential for cell alignment, and the ability to create surface roughness with targeted kurtosis and skewness to control and optimize friction and tribological functionalities. The results are summarized in terms of surface geometry (open or closed) mechanisms and phenomena (anchoring, membrane elasticity), material properties (anchoring coefficients, membrane bending modulus, Frank elasticity), wrinkling scales and scaling laws (amplitude, wave-lengths, skewness, kurtosis) and functionalities (optical iridescence, friction, wettability, structural color, curvature-driven cell alignment and differentiation). Taken together, the range of surface geometries and surface functionalities captured by the liquid crystal biomimetic in silico platform provides a foundation for future experimental green manufacturing pathways based on anisotropic soft matter.

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Effect of ultrasonication on lubrication performance of cellulose nano-crystalline (CNC) suspensions as green lubricants

Cited by 22 publications

References 56 publications

Effect of sonication to the stability properties of carboxymethyl cellulose/uncaria gambir extract water-based lubricant

Effect of sonication to the stability properties of carboxymethyl cellulose/uncaria gambir extract water-based lubricant

Antibody Immobilization on Sulfated Cellulose Nanocrystals

Pattern formation, structure and functionalities of wrinkled liquid crystal surfaces: A soft matter biomimicry platform

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