Film based on magnesium impregnated biochar/cellulose acetate for phosphorus adsorption from aqueous solution

Pinto, Marina de Carvalho Eufrásio; Silva, Demétrius David da; Gomes, Ana Luiza Amorim; Leite, Victor dos Santos Azevedo; Moraes, Allan Robledo Fialho e; Novais, Roberto Ferreira; Tronto, Jairo; Pinto, Francisco de Assis de Carvalho

doi:10.1039/c8ra06655h

Cited by 56 publications

(17 citation statements)

References 56 publications

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“…CA shows a melting temperature of 235°C 50 . This time, the DSC curve of the film after washing the PPP (Figure 4b) does not match the curve of the PA film due to the presence of the PPP in a higher proportion.…”

Section: Resultsmentioning

confidence: 97%

“…PVA (Figure 4a), as a semicrystalline polymer, shows two transitions, a glass transition (T g ) at 72 C and a melting temperature (T m ) at 170 C. 49 PA films show a T g of 281 C, and for the film PA-PVA10-P, a transition at around 170 C shows ups, and a slight lowering of the T g of the aramid, due to PVA residues present. CA shows a melting temperature of 235 C. 50 This time, the DSC curve of the film after washing the PPP (Figure 4b) does not match the curve of the PA film due to the presence of the PPP in a higher proportion. The same phenomenon is observed for PA-PEOx100-P DSC curves, showing the presence of PEOx, and even not observing the T g of the PA after washing.…”

Section: Thermal Performancementioning

confidence: 98%

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Preparation of low‐density high‐performance porous aramid films using porosity promoter polymers

Rubio‐Aguinaga

Ruiz

Muñoz

et al. 2022

J of Applied Polymer Sci

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Low-density porous aramid films using inexpensive and widely available polymers as porosity promoters, that is, polyvinyl alcohol (PVA), poly(2-ethyl-2-oxazoline) (PEOx), and cellulose polyacetate (CA) were fabricated. Porous poly (m-phenylene isophthalamide) films were obtained by the standard casting procedure using mixtures of the aramid with either PVA, PEOx, or CA, followed by the removal of the porosity promoter polymers by immersing them in water or acetone. As a result, films with up to a 65% density reduction with pore sizes ranging from 0.02 to 10 μm and up to 30% increment in Young's modulus were obtained. In addition, the morphology of the films was homogeneous and was controlled by the proportion and nature of the porosity promoter polymer. The density reduction of materials plays a significant role in energy crises and the need for fuel reduction. This study revealed that it is possible to prepare low-density porous aramid films inexpensively without impairing their outstanding performance by using PVA in the casting procedure as a porosity promoter polymer.

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Section: Resultsmentioning

confidence: 97%

Section: Thermal Performancementioning

confidence: 98%

Preparation of low‐density high‐performance porous aramid films using porosity promoter polymers

Rubio‐Aguinaga

Ruiz

Muñoz

et al. 2022

J of Applied Polymer Sci

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“…The complete degradation temperature (loss of acetylated lignins) of CA was reported at the temperature of 310°C 41 . At higher temperatures (above 450°C), the complete carbonization of CA to ash occurred 42,43 …”

Section: Resultsmentioning

confidence: 99%

“…39 The complete degradation temperature (loss of acetylated lignins) of CA was reported at the temperature of 310 C. 41 At higher temperatures (above 450 C), the complete carbonization of CA to ash occurred. 42,43 Unlike the CA powder, the T m of electrospun CA nanofibers shifted to a lower temperature and a considerable shrinkage of the endothermic region was observed, thereby this area was limited to 120-180 C with the onset temperature at about 151.89 C (Figure 4b). The glass transition temperature (T g ) for CA nanofibers was also measured at about 123.9 C in the thermogram.…”

Section: Thermal Analysismentioning

confidence: 99%

Designing a colorimetric nanosensor based on dithizone and cholesteric liquid crystals loaded in electrospun cellulose acetate nanofibers: Monitoring the quality of pistachio as a case study

Ghorani¹,

Emadzadeh²,

Fooladi³

et al. 2022

J of Applied Polymer Sci

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We describe colorimetric electrospun nanosensors designed to work at temperatures of 35-36 C. The mode of operations is based on a combination of the ability of dithizone to exhibit appropriate color and cholesteric liquid crystals presenting a wide range of melting points at various mixing ratios. To this end, different levels of dithizone (IUPAC name 1-anilino-3-phenyliminothiourea), different ratios of cholesteric liquid crystals to cellulose acetate and cholesteryl oleyl carbonate to cholesteryl nanoate were defined as independent variables and the total color difference was considered as the response in the response surface methodology approach. The results showed that the range of color palette changes of the designed samples was diverse and could be applied to different products. As a case study, the applicability of the sensor was evaluated on the 4-month shelf life of pistachio nuts at 35 C whilst the spoilage criteria were reconciled with the color changes in the designed sensor.

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“…The second phase of degradation occurs from 200°C to 300°C which attributes to the breakage/decomposition of glycosidic bonds and thermal decomposition of the hemicelluloses thereby destroying the cellulose acetate chain. The third phase of decomposition occurs from 400°C up to 500°C which is the complete decomposition/carbonization of the material [27]. According to the sterilization protocols, steam sterilization is the most inexpensive technique used in hospitals to sterilize all the surgical equipment prior to the surgery.…”

Section: Thermal Gravimetric Analysismentioning

confidence: 99%

Drug Eluting Bioresorbable Cellulose Acetate/PEO/HPMC Composite With Propolis Extracts for Suturing Application

Ramadoss¹,

Arivuoli²,

Basha³

2021

JMSSE

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A detailed study on a drug eluting cellulose based resorbable suture material, elaborately characterized for its mechanical and physico-chemical properties is presented. The biocompatibility of the material was tested with 3T3 [NIH] cells. The material's ability to be heat sterilized has been verified with thermogravimetric analysis which exhibited stability up to 200°C. Drug eluting property of the material loaded with propolis and without propolis has been assessed and the corresponding kinetics was determined. The material with propolis has shown a sustained drug release property of up to 56.96% in 72 hours following Zero-order kinetics. For an ideal suture material, blood clotting on the surface of the material could lead to serious complications, the synthesized cellulose composite materials have shown anti-thrombogenic property. The cellulose composite material with propolis incorporation has shown superior properties in mechanical strength, thermal stability, drug release, biocompatibility, surface wettability, anti-microbial and thrombus formation characteristics which is ideal for suture application. The composite material showed favorable morphological and mechanical changes during various stages of in-vitro degradation in DMEM.

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Film based on magnesium impregnated biochar/cellulose acetate for phosphorus adsorption from aqueous solution

Abstract: New hybrid film formed by biopolymer cellulose acetate and biochar for P adsorption in aqueous solution.

Cited by 56 publications

References 56 publications

Preparation of low‐density high‐performance porous aramid films using porosity promoter polymers

Preparation of low‐density high‐performance porous aramid films using porosity promoter polymers

Designing a colorimetric nanosensor based on dithizone and cholesteric liquid crystals loaded in electrospun cellulose acetate nanofibers: Monitoring the quality of pistachio as a case study

Drug Eluting Bioresorbable Cellulose Acetate/PEO/HPMC Composite With Propolis Extracts for Suturing Application

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