Effect of concentration and degree of saturation on co-precipitation of catechin and poly(l-lactide) by the RESOLV process

Songtipya, Ladawan; Sane, Amporn

doi:10.1016/j.supflu.2012.12.024

Cited by 11 publications

(6 citation statements)

References 52 publications

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“…These results clearly suggest that the rapid expansion process can be used to prepare CAPE-NPs with no significant adverse effect on either AM or AO activity of CAPE. This might be due to the short processing time and the absence of light and oxygen in the rapid expansion process, leading to minimization of undesirable oxidation reactions . In addition, NPs via the RESOLV process could allow the use of smaller dosages of bioactive compounds, together with an increase in surface area and an enhancement of dissolution, resulting in a rise in bioactivity of bioactive substances. , …”

Section: Resultsmentioning

confidence: 99%

“…This might be due to the short processing time and the absence of light and oxygen in the rapid expansion process, leading to minimization of undesirable oxidation reactions. 19 In addition, NPs via the RESOLV process could allow the use of smaller dosages of bioactive compounds, together with an increase in surface area and an enhancement of dissolution, resulting in a rise in bioactivity of bioactive substances. 15,16 CAPE-NPs-Incorporated Methyl Cellulose Film Samples.…”

Section: Determination Of Bioactive Activities and Tpc Of The Filmsmentioning

confidence: 99%

“…Apart from such bioactive substances, recent innovations in nanotechnology offer great promise in fulfilling the broad functional requirements. Nanoparticles (NPs) could be coupled with active packaging to potentially allow the use of smaller dosages of bioactive compounds, together with an increase in surface area, enhancement of dissolution, and an increase in bioactivity of active substances. , Rapid expansion of subcritical solutions into liquid solvents (RESOLV), which has been developed on the basis of supercritical fluid technology, is a versatile technique for producing stable suspensions of well-dispersed and uniform nanoparticles. − …”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Novel Bioactive Cellulose-Based Films Derived from Caffeic Acid Phenethyl Ester-Loaded Nanoparticles via a Rapid Expansion Process: RESOLV

Saelo

Assatarakul

Sane

et al. 2016

J. Agric. Food Chem.

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Caffeic acid phenethyl ester (CAPE) nanoparticles (NPs) with an average size of ∼40 nm obtained from TEM and binomial average sizes of ∼90 and ∼400 nm obtained from DLS were successfully produced by rapid expansion of subcritical solutions into liquid solvents (RESOLV). The minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) of CAPE and CAPE-NPs were determined by plate count method against 12 pathogenic and spoilage bacteria and 3 strains of yeast. Total phenolic content (TPC) and antioxidant activities of CAPE-NPs were quantified and subsequently investigated using two assays, including 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging and ferric reducing antioxidant power (FRAP). CAPE-NP-incorporated cellulose-based films were prepared and characterized. MICs and MBCs of CAPE-NPs against most bacteria and Candida albicans were 700 and 1400 μg/mL, respectively. CAPE-NPs yielded a TPC value of 426.74 μgGAE/mg and lower antioxidant activities than those of CAPE in ethanol (CAPE-EtOH), whereas BHT yielded lower FRAP than that of CAPE-NPs. The impregnation of CAPE into cellulose-based films was confirmed by FTIR spectra. Moreover, incorporation of only 0.5 wt % CAPE-NPs into the films resulted in an inhibitory effect against microorganisms. Fortunately, incorporation of higher concentration of CAPE-NPs-MC films led to a significantly higher antioxidant activity and vice versa. This indicated that CAPE-NPs significantly enhanced the antimicrobial and antioxidant activities of CAPE. The results show that the environmentally benign supercritical CO2 technique should be generally applicable to NP fabrication of other important bioactive ingredients, especially in liquid form. In addition, it is suggested that CAPE-NPs can be used to reduce the dosage of CAPE and improve their bioavailability and thus merit further investigation for bioactive packaging film and coating applications.

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Section: Resultsmentioning

confidence: 99%

Section: Determination Of Bioactive Activities and Tpc Of The Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication of Novel Bioactive Cellulose-Based Films Derived from Caffeic Acid Phenethyl Ester-Loaded Nanoparticles via a Rapid Expansion Process: RESOLV

Saelo

Assatarakul

Sane

et al. 2016

J. Agric. Food Chem.

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“…In the SCF-based technique to produce the micro/nano particles, SCFs can be used as an anti-solvent, solvent, and reaction media. The entire range of such processes could be classified in different classes: (1) SCF as a solvent; e.g., rapid expansion of the supercritical solution (RESS) [10,23,24,25,26], rapid expansion of the supercritical solution into liquid solvent (RESOLV) [27], and rapid expansion of the supercritical solution with a nonsolvent (RESS-N) [28,29], (2) SCF as an anti-solvent; e.g., gas anti-solvent (GAS) [30,31,32,33], supercritical anti-solvent (SAS) [24,34,35,36], supercritical assisted atomization (SAA) [37], aerosol solvent extraction system (ASES) [38], solution-enhanced dispersion by the supercritical fluids (SEDS) [39], and particles by the compressed anti-solvent (PCA) [40], (3) SCF as the cosolvents; e.g., particles from the gas-saturated solutions (PGSS) [24,41,42], PGSS-drying [43], gas-assisted melting atomization (GAMA), and depressurization of the expanded liquid organic solution (DELOS) [44], and (4) SCF as a nebulization compound; e.g., carbon dioxide-assisted nebulization with a bubble dryer (CAN-BD) [44] and supercritical fluid-assisted atomization (SAA) [16,45,46,47]. Recently, Sodeifian et al, reported the use of a new ultrasonic method combined with RESSAS and RESOLV (US-RESSAS and US-RESOLV) [48,49].…”

Section: Introductionmentioning

confidence: 99%

Preparation of phthalocyanine green nano pigment using supercritical CO2 gas antisolvent (GAS): experimental and modeling

Ardestani

Sodeifian

2020

Heliyon

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Phthalocyanine green nano pigment was prepared using supercritical gas antisolvent (GAS) process based on the SC-CO 2 method. Thermodynamic models were developed to study the volume expansion and operating conditions of the GAS process. Peng-Robinson EoS were applied for binary (CO 2 and DMSO) and ternary (CO 2 , DMSO, and pigment) systems. A Box–Behnken experimental design was used to optimize the process. Influences of temperature (308, 318 and 328 K), pressure (10, 15 and 20 MPa) and solute concentration (10, 40 and 70 mg/mL) were studied on the particles size and their morphology. The fine particles produced were characterized by SEM, DLS, XRD, FTIR and DSC. Experimental results showed a great reduction in size of pigment particles in comparison to the original particles. The mean particle sizes of nanoparticles were obtained to 27.1 nm after GAS based on SC-CO 2 method.

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“…It has been reported that the phenolic hydroxyl group shows antibacterial properties . Using PLA and CT, there are several known examples, such as the controlled release of CT from the PLA matrix, and the hydrogen bonding interaction between PLA and CT; however, there are no examples of CT capped PLA.…”

Section: Introductionmentioning

confidence: 99%

Catechin‐Modified Polylactide Stereocomplex at Chain End Improved Antibiobacterial Property

Ajiro

Ito

Kan

et al. 2016

Macromolecular Bioscience

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Using different type of initiators, the antibacterial moieties are introduced at the chain end of poly(L,L-lactide) (PLLA) and poly(D,D-lactide) (PDLA), and the thermal properties are simultaneously improved using the stereocomplex approach. The physical interaction of polymers and antibacterial compounds is investigated. The double bonds at the chain end are utilized for the interaction of silver ion; however, the silver ions are not detected after stereocomplexation of PLLA and PDLA. On the other hand, catechin (CT) is selected as an initiator precursor of lactide polymerization, protecting the phenolic hydroxyl groups. The linear PLLA and PDLA are obtained by the initiator, resulting in CT conjugated PLAs at the chain end groups after deprotection of phenolic hydroxyl groups. The antibacterial properties are determined by proliferation tests of staphylococcus aureus. The results suggest that the antibacterial properties of CT modified PLAs are derived from the original CT parts.

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Effect of concentration and degree of saturation on co-precipitation of catechin and poly(l-lactide) by the RESOLV process

Cited by 11 publications

References 52 publications

Fabrication of Novel Bioactive Cellulose-Based Films Derived from Caffeic Acid Phenethyl Ester-Loaded Nanoparticles via a Rapid Expansion Process: RESOLV

Fabrication of Novel Bioactive Cellulose-Based Films Derived from Caffeic Acid Phenethyl Ester-Loaded Nanoparticles via a Rapid Expansion Process: RESOLV

Preparation of phthalocyanine green nano pigment using supercritical CO2 gas antisolvent (GAS): experimental and modeling

Catechin‐Modified Polylactide Stereocomplex at Chain End Improved Antibiobacterial Property

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