Physical and mechanical testing of essential oil-embedded cellulose ester films

Bastos, Maria do Socorro Rocha; Laurentino, Larissa da Silva; Canuto, Kirley Marques; Mendes, Luana Guabiraba; Martins, Camila Mota; Silva, Sarah Maria Frota; Furtado, Roselayne Ferro; Kim, Sang-Hoon; Biswas, Atanu; Cheng, H. N.

doi:10.1016/j.polymertesting.2015.11.006

Cited by 62 publications

(21 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Taking into consideration the Young’s modulus and elongation at break parameters, the incorporation of at least 9 wt % of RIL or plasticizers (TBC and ATBC) to CAP-based membrane allowed the achievement of more advantageous mechanical performance than the application of essential oils [ 39 ]. The use of 10% and 20% ( v / w ) of lemongrass and basil oil for CAP-based membranes did not change the elongation at break value significantly compared to the pure CAP [ 41 ] ( Table 2 ).…”

Section: Resultsmentioning

confidence: 99%

“…The thermal properties of pure RIL, pristine CAP membrane, and CAP-based membranes modified with RIL and plasticizers (TBC and ATBC) were investigated by using thermogravimetric analysis ( Figure 5 ). The thermal degradation profile of CAP and CAP-RIL membranes shows one degradation step for pure CAP membrane, which is related to the simultaneous degradation of acetate and propionate functional groups with a subsequent pyrolysis of the cellulose ring [ 39 ] ( Figure 5 A). In the case of pure RIL, four degradation steps are observed.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of Reactive Ionic Liquid or Plasticizer Incorporation on the Physicochemical and Transport Properties of Cellulose Acetate Propionate-Based Membranes

et al. 2018

View full text Add to dashboard Cite

Pervaporation is a membrane-separation technique which uses polymeric and/or ceramic membranes.In the case of pervaporation processes applied to dehydration, the membrane should transport water molecules preferentially. Reactive ionic liquid (RIL) (3-(1,3-diethoxy-1,3-dioxopropan-2-yl)-1-methyl-1H-imidazol-3-ium) was used to prepare novel dense cellulose acetate propionate (CAP) based membranes, applying the phase-inversion method. The designed polymer-ionic liquid system contained ionic liquid partially linked to the polymeric structure via the transesterification reaction. The various physicochemical, mechanical, equilibrium and transport properties of CAP-RIL membranes were determined and compared with the properties of CAP membranes modified with plasticizers, i.e., tributyl citrate (TBC) and acetyl tributyl citrate (ATBC). Thermogravimetric analysis (TGA) testified that CAP-RIL membranes as well as CAP membranes modified with TBC and ATBC are thermally stable up to at least 120 • C. Tensile tests of the membranes revealed improved mechanical properties reflected by reduced brittleness and increased elongation at break achieved for CAP-RIL membranes in contrast to pristine CAP membranes. RIL plasticizes the CAP matrix, and CAP-RIL membranes possess preferable mechanical properties in comparison to membranes with other plasticizers investigated. The incorporation of RIL into CAP membranes tuned the surface properties of the membranes, enhancing their hydrophilic character. Moreover, the addition of RIL into CAP resulted in an excellent improvement of the separation factor, in comparison to pristine CAP membranes, in pervaporation dehydration of propan-2-ol. The separation factor β increased from ca. 10 for pristine CAP membrane to ca. 380 for CAP-16.7-RIL membranes contacting an azeotropic composition of water-propan-2-ol mixture (i.e., 12 wt % water).

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The Effect of Reactive Ionic Liquid or Plasticizer Incorporation on the Physicochemical and Transport Properties of Cellulose Acetate Propionate-Based Membranes

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The elongation values of the cellulose C8 and C16 esters were much higher than reported for commercially available shorter chain-length CA, CAP, and CAB [38,39,40], but the elastic modulus and tensile strength values were lower. This is in line with an earlier reported observation [41] stating that when elongation values increased, elastic modulus and tensile strength decreased.…”

Section: Resultsmentioning

confidence: 58%

Injection Molding of Thermoplastic Cellulose Esters and Their Compatibility with Poly(Lactic Acid) and Polyethylene

2018

View full text Add to dashboard Cite

Interest in biobased polymers from renewable resources has grown in recent years due to environmental concerns, but they still have a minimal fraction of the total global market. In this study, the injection molding of thermoplastic cellulose octanate (cellulose C8) and cellulose palmitate (cellulose C16) were studied. The mechanical properties of injection-molded test specimens were analyzed by using tensile testing, and the internal structure of injection-molded objects was studied by using a field emission scanning electron microscopy (FE-SEM). We showed that thermoplastic cellulose C8 and cellulose C16 were completely processable without the addition of a plasticizer, which is very unusual in the case of cellulose esters. The compatibility of cellulose esters with poly(lactic acid) (PLA) and biopolyethylene (bio-PE) was also tested. By compounding the cellulose esters with PLA, the elongation of PLA-based blends could be improved and the density could be reduced. The tested thermoplastic cellulose materials were fully biobased, and have good future potential to be used in injection molding applications.

show abstract

“…The essential oils were analyzed by Gas Chromatography Mass Spectroscopy (GC-MS) and Gas Chromatography with a Flame Ionization Detector (GC-FID) to determine their chemical composition according to chromatographic method described earlier (18). GC-MS analysis was performed on a Varian 450-GC/240-MS instrument equipped with a non-polar VF-5MS fused silica capillary column (30 m × 0.25 mm i.d., 0.25 μm film thickness), using helium as carrier gas and a flow rate of 1.5 mL/min, with a split ratio of 1:30.…”

Section: Essential Oil Analysismentioning

confidence: 99%

Acaricidal activity of cashew nut shell liquid associated with essential oils from Cordia verbenacea and Psidium guajava on Rhipicephalus microplus

Castro

Costa-Júnior

Lima

et al. 2019

Journal of Essential Oil Research

Self Cite

View full text Add to dashboard Cite

The aim of this study was to assess the effectiveness of cashew nut shell liquid (CNSL), Cordia verbenacea and Psidium guajava, both alone and in association against Rhipicephalus microplus. Larval packet and adult immersion tests were conducted in concentrations ranging from 3.1 at 100.0mg mL −1. CNSL was effective against engorged females (99.6%) at 100.0mg mL −1 and against larvae (99.2 %) at 50.0mg mL −1. The highest efficacy on engorged females was achieved by the essential oils of P. guajava at 12.5mg mL −1 (99.9%), followed by those of C. verbenacea at 25.0mg mL −1 (96.9%), while a low larvicidal activity of 5.8 and 59.0% was, respectively, obtained. The association at 50.0mg mL −1 had asignificant effect on both life stages of R. microplus. This association caused considerable larval mortality (95.3%) and high efficacy on engorged females (93.9%).

show abstract

Physical and mechanical testing of essential oil-embedded cellulose ester films

Cited by 62 publications

References 27 publications

The Effect of Reactive Ionic Liquid or Plasticizer Incorporation on the Physicochemical and Transport Properties of Cellulose Acetate Propionate-Based Membranes

The Effect of Reactive Ionic Liquid or Plasticizer Incorporation on the Physicochemical and Transport Properties of Cellulose Acetate Propionate-Based Membranes

Injection Molding of Thermoplastic Cellulose Esters and Their Compatibility with Poly(Lactic Acid) and Polyethylene

Acaricidal activity of cashew nut shell liquid associated with essential oils from Cordia verbenacea and Psidium guajava on Rhipicephalus microplus

Contact Info

Product

Resources

About