Effect of acid treatments on thermal properties of bacterial cellulose produced from cassava liquid waste

Sari, Andarany Kartika; Majlan, Edy Herianto; Loh, Kai; Wong, W. Y.; Alva, Sagir; Khaerudini, Deni Shidqi; Yunus, Rozan Mohamad

doi:10.1016/j.matpr.2021.10.130

Cited by 10 publications

(7 citation statements)

References 20 publications

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“…Figure 5 presents the thermal degradation processes of LY, LY‐APP, and LY‐NAPP fibers under a nitrogen atmosphere. All samples exhibit a weight loss from 30 to 180°C, which can be attributed to water evaporation 32 . Table 1 provides detailed data regarding the thermal decomposition of the fibers.…”

Section: Resultsmentioning

confidence: 99%

“…All samples exhibit a weight loss from 30 to 180 C, which can be attributed to water evaporation. 32 Table 1 provides detailed data regarding the thermal decomposition of the fibers. The main weight loss stage of LY fiber occurs in the range of 230-350 C, with an onset decomposition temperature (T onset ) of 227.4 C, a maximum degradation rate (R max ) of 12.0%/ C at a temperature (T max ) of 316 C. During this stage, the pyran ring on the cellulose macromolecule chain segment undergoes ring opening, and the glycosidic bond breaks, resulting in a decrease in the polymerization of the cellulose molecular chain.…”

Section: Thermal Stabilitymentioning

confidence: 99%

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N‐methylmorpholine‐N‐oxide molecules coated ammonium polyphosphates for dope spinning of flame‐retardant lyocell fiber

Bai,

Peng,

Nie

et al. 2024

Polymer Engineering & Sci

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Lyocell fiber, hailed as the “verdant filament of the 21st century,” boasts elevated tensile strength, environmentally conscientious production practices, and innate biodegradability. Nonetheless, its intrinsic combustibility constitutes a noteworthy impediment to its pervasive utilization across textile and industrial domains. In a concerted effort to surmount this challenge, ammonium polyphosphate (APP) underwent modification through the infusion of N‐methylmorpholine‐N‐oxide (NMMO) molecules, amplifying its dispersibility within lyocell solutions. The resultant NMMO‐coated ammonium polyphosphate (NAPP) underwent meticulous characterization of both its structure and properties. Remarkably, lyocell fiber impregnated with 30% NAPP exhibited exemplary flame retardancy, enduring through 30 laundering cycles. Notably, its tensile strength remained notably robust at 139 MPa, demonstrating a mere 6.1% reduction in comparison to its pristine lyocell counterpart. This study delineates a promising trajectory for the fabrication of mechanically resilient lyocell fibers endowed with commendable flame‐retardant attributes.Highlights The raw material is waste cotton textiles, prepared on a green basis. The use of ultrasonic mixing and low‐speed stirring defoaming method and the use of room temperature spinning advantage of the production of flame retardant lyocell fiber. The amount of flame retardant is small, and the mechanical strength is reduced to a lesser extent. Good flame‐retardant effect and excellent water washing resistance.

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Section: Resultsmentioning

confidence: 99%

Section: Thermal Stabilitymentioning

confidence: 99%

N‐methylmorpholine‐N‐oxide molecules coated ammonium polyphosphates for dope spinning of flame‐retardant lyocell fiber

Bai,

Peng,

Nie

et al. 2024

Polymer Engineering & Sci

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“…NdC and phosphorylated NdC were prepared following the procedure in our previous work, and Figure 1 shows the phosphorylation process [ 22 ]. Microwave-assisted organic synthesis can be used to rapidly explore chemistry space and increase the diversity of compounds produced [ 23 ].…”

Section: Methodsmentioning

confidence: 99%

Nata de Cassava Type of Bacterial Cellulose Doped with Phosphoric Acid as a Proton Exchange Membrane

et al. 2022

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This work aims to encourage the use of natural materials for advanced energy applications, such as proton exchange membranes in fuel cells. Herein, a new conductive membrane produced from cassava liquid waste was used to overcome environmental pollution and the global crisis of energy. The membrane was phosphorylated through a microwave-assisted method with different phosphoric acid, (H3PO4) concentrations (10–60 mmol). Scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), dynamic mechanical analysis (DMA), swelling behavior test, and contact angle measurement were carried out on the membrane doped with different H3PO4 levels. The phosphorylated NdC (nata de cassava) membrane doped with 20 mmol (NdC20) H3PO4 was successfully modified and significantly achieved proton conductivity (maximum conductivity up to 7.9 × 10−2 S cm−1 at 80 °C). In addition, the fabricated MEA was assembled using an NdC20 membrane with 60 wt% Pt/C loading of 0.5 mg cm−2 for the anode and cathode. Results revealed that a high power density of 25 mW cm−2 was obtained at 40 °C operating temperature for a single-cell performance test. Thus, this membrane has the potential to be used as a proton exchange membrane because it is environment-friendly and inexpensive for fuel cell applications.

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“…After fermentation occurs in the culture media and bacterial cellulose is obtained, a purification process is mandatory since the product is not of high purity and may contain culture media residues (for example, lignin and hemicellulose), unwanted cells, or side products [ 53 , 54 ]. A standard, but expensive, purification procedure requires the following steps: harvesting the bacterial cellulose pellicles from the culture vessel, washing them in distilled water to remove any residual medium, treating them with NaOH/KOH/Na 2 CO 3 at 100 °C for 15–20 min to kill the microorganisms, filtering them using an aspirator, and finally neutralizing the filtrate using distilled water.…”

Section: Bacterial Cellulose—pioneer For Continuously Developing Macr...mentioning

confidence: 99%

Bacterial Cellulose—A Remarkable Polymer as a Source for Biomaterials Tailoring

et al. 2022

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Nowadays, the development of new eco-friendly and biocompatible materials using ‘green’ technologies represents a significant challenge for the biomedical and pharmaceutical fields to reduce the destructive actions of scientific research on the human body and the environment. Thus, bacterial cellulose (BC) has a central place among these novel tailored biomaterials. BC is a non-pathogenic bacteria-produced polysaccharide with a 3D nanofibrous structure, chemically identical to plant cellulose, but exhibiting greater purity and crystallinity. Bacterial cellulose possesses excellent physicochemical and mechanical properties, adequate capacity to absorb a large quantity of water, non-toxicity, chemical inertness, biocompatibility, biodegradability, proper capacity to form films and to stabilize emulsions, high porosity, and a large surface area. Due to its suitable characteristics, this ecological material can combine with multiple polymers and diverse bioactive agents to develop new materials and composites. Bacterial cellulose alone, and with its mixtures, exhibits numerous applications, including in the food and electronic industries and in the biotechnological and biomedical areas (such as in wound dressing, tissue engineering, dental implants, drug delivery systems, and cell culture). This review presents an overview of the main properties and uses of bacterial cellulose and the latest promising future applications, such as in biological diagnosis, biosensors, personalized regenerative medicine, and nerve and ocular tissue engineering.

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Effect of acid treatments on thermal properties of bacterial cellulose produced from cassava liquid waste

Cited by 10 publications

References 20 publications

N‐methylmorpholine‐N‐oxide molecules coated ammonium polyphosphates for dope spinning of flame‐retardant lyocell fiber

N‐methylmorpholine‐N‐oxide molecules coated ammonium polyphosphates for dope spinning of flame‐retardant lyocell fiber

Nata de Cassava Type of Bacterial Cellulose Doped with Phosphoric Acid as a Proton Exchange Membrane

Bacterial Cellulose—A Remarkable Polymer as a Source for Biomaterials Tailoring

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