Preparation and characterization of long-term antibacterial and pH-responsive Polylactic acid/Octenyl succinic anhydride-chitosan @ tea tree oil microcapsules

Zhu, Zeming; Hu, Jianfeng; Zhong, Zicheng

doi:10.1016/j.ijbiomac.2022.09.038

Cited by 24 publications

(17 citation statements)

References 47 publications

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“…This is because OBs undergo dehydration shrinkage during the drying process in the presence of MD, which decreases their particle size. Zhu et al ( 15 ) reached similar conclusions: the smaller the OBs particles, the more homogeneous the particle size distribution of OB-MD. The above results show that when the volume fraction of the oil phase is too high, the excess oil cannot be well wrapped by the wall material.…”

Section: Results and Analysismentioning

confidence: 64%

“…Mohona and Pradyuman ( 14 ) revealed that MD was used effectively to prevent degradation and extend the bioactive substances’ shelf life in the encapsulation of fenugreek seed oil. Zhu et al ( 15 ) found that the encapsulation efficiency of soybean OBs using maltodextrins with different degrees of hydrolysis reached up to 88.84 g/100 g, which significantly improved thermal and oxidative stability of OBs. Maurer et al ( 16 ) found that the encapsulation efficiency and oxidative stability of the OBs were improved by adding maltodextrin.…”

Section: Introductionmentioning

confidence: 99%

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Effect of maltodextrin on the oxidative stability of ultrasonically induced soybean oil bodies microcapsules

Sun

Zhu

et al. 2022

Front. Nutr.

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IntroductionEncapsulation of soybean oil bodies (OBs) using maltodextrin (MD) can improve their stability in different environmental stresses and enhance the transport and storage performance of OBs.MethodsIn this study, the effects of different MD addition ratios [OBs: MD = 1:0, 1:0.5, 1:1, 1:1.5, and 1:2 (v/v)] on the physicochemical properties and oxidative stability of freeze-dried soybean OBs microcapsules were investigated. The effect of ultrasonic power (150–250 W) on the encapsulation effect and structural properties of oil body-maltodextrin (OB-MD) microcapsules were studied.ResultsThe addition of MD to OBs decreased the surface oil content and improved the encapsulation efficiency and oxidative stability of OBs. Scanning electron microscopy images revealed that the sonication promoted the adsorption of MD on the surface of OBs, forming a rugged spherical structure. The oil-body-maltodextrin (OB-MD) microcapsules showed a narrower particle size distribution and a lower-potential absolute value at an MD addition ratio of 1:1.5 and ultrasonic power of 250 W (32.1 mV). At this time, MD-encapsulated OBs particles had the highest encapsulation efficiency of 85.3%. Ultrasonic treatment improved encapsulation efficiency of OBs and increased wettability and emulsifying properties of MD. The encapsulation of OBs by MD was improved, and its oxidative stability was enhanced by ultrasound treatment, showing a lower hydrogen peroxide value (3.35 meq peroxide/kg) and thiobarbituric acid value (1.65 μmol/kg).DiscussionThis study showed that the encapsulation of soybean OBs by MD improved the stability of OBs microcapsules and decreased the degree of lipid oxidation during storage. Ultrasonic pretreatment further improved the encapsulation efficiency of MD on soybean OBs, and significantly enhanced its physicochemical properties and oxidative stability.

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Section: Results and Analysismentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Effect of maltodextrin on the oxidative stability of ultrasonically induced soybean oil bodies microcapsules

Sun

Zhu

et al. 2022

Front. Nutr.

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“…Following, 30 mg of BTA-HMSN/ZIF-8-MNZ nanocapsules are ultrasonically dispersed in 50 mL 0.1 M HCl solution for 24 h to ensure the full release of the encapsulated MNZ and BTA. The encapsulated amount is estimated according to the above calibration curves and the encapsulation efficiency ( E %) can be calculated as the following equations E .25em % = M normalr M normalt × 100 % where M r is the mass of the encapsulated MNZ or BTA, and M t is the total mass of BTA-HMSN/ZIF-8-MNZ nanocapsules.…”

Section: Methodsmentioning

confidence: 99%

Sulfide-Ion-Responsive Mesoporous Silica/ZIF-8 Nanocapsules to Inhibit Microbiologically Influenced Corrosion

Chen,

Shao,

Tang

et al. 2023

ACS Appl. Nano Mater.

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Microbiologically influenced corrosion (MIC) accounts for a large proportion of industrial steel corrosion, among which the most representative microorganism is sulfatereducing bacteria (SRB). The direct application of the fungicides may cause high utilization dosage, increased bacterial resistance, and environmental pollution and cannot realize the effective longlasting antimicrobial and corrosion inhibition performance. Herein, a novel kind of nanocapsule with both bactericidal and corrosion inhibition functions is developed. The hollow mesoporous silica (HMSNs) is used as the carrier and encapsulated with benzotriazole (BTA) inhibitors; their surface microchannels are sealed with the bactericide metronidazole (MNZ)-loaded ZIF-8 nanovalve. The high-performance liquid chromatography results confirm that the encapsulation amounts of MNZ and BTA in the nanocapsules are 7.67% and 4.20%, respectively. Moreover, the as-prepared BTA-HMSN/ZIF-8-MNZ nanocapsules exhibit a typical sulfide ion-responsive characteristic. The release rate of the encapsulated MNZ and BTA rises with the increased sulfide-ion concentrations, and the cumulative release amount reaches 80% after 24 h when the sulfide-ion concentration attains 2 mM. Furthermore, the antimicrobial performance of BTA-HMSN/ZIF-8-MNZ nanocapsules is evaluated in SRB solutions. The survival SRB amounts decrease evidently with the increased nanocapsule concentration, and the antibacterial efficiency is nearly 100% at a concentration of 250 μg•mL −1 . The weight loss test and surface analysis also confirm the excellent corrosion inhibition ability of the BTA-HMSN/ZIF-8-MNZ nanocapsules to Q235 steels, whose inhibition efficiency is up to 89.23% after 8 h of immersion in a corrosive environment after the addition of 12 mg•mL −1 of BTA-HMSN/ZIF-8-MNZ nanocapsules. Meanwhile, the Q235 steel maintains a smooth and uniform surface with the protection of BTA-HMSN/ZIF-8-MNZ nanocapsules. Overall, the combination of MNZ bactericides and BTA corrosion inhibitors greatly strengthens the antimicrobial and corrosion inhibition performance of the nanocapsules, and this kind of intelligent sulfide ion-responsive protective system also provides insights for retarding MIC in a complex corrosive environment.

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“…22,23 Tea tree oil has been loaded into suitable delivery systems such as liposomes, 24 lipid nanoparticles, 25 cyclodextrin complexes 26 and microcapsules. 27 However, these delivery systems have high preparation costs and require complex processes. Nanoemulsions have shown great potential as colloidal dispersion systems with a simple preparation process and easy operation.…”

Section: Introductionmentioning

confidence: 99%

“…Tea tree oil has been loaded into suitable delivery systems such as liposomes, 24 lipid nanoparticles, 25 cyclodextrin complexes 26 and microcapsules 27 . However, these delivery systems have high preparation costs and require complex processes.…”

Section: Introductionmentioning

confidence: 99%

Preparation of tea tree oil nanoemulsion: Characterisation, antibacterial mechanism and evaluation of apoptosis

Han

Wang

Zhuansun

et al. 2023

Flavour & Fragrance J

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Tea tree oil (TTO) is a natural plant essential oil that has strong bactericidal properties and low toxicity. However, owing to its irritability, volatility, instability under light/oxygen and hydrophobicity, the application of TTO in pharmaceutical production technology and the food industry is limited. To overcome these problems, TTO nanoemulsions (TTONs) were prepared using a high-speed shearing method. The mean droplets size of TTON was measured. TTON droplets were observed using confocal laser scanning microscopy and analysed using a Turbiscan scanning spectrum. The most suitable nanoemulsion formula was obtained as follows: TTO content, 10% (w/w); Tw-40 content, 8% (w/w); deionised water content, 82% (w/w); shearing time, 5 minutes. The antibacterial effect of TTON was studied, and it was found that its antibacterial activity against Escherichia coli was more potent than that against Staphylococcus aureus. The antibacterial mechanism of TTON was also investigated by observing bacterial morphology using scanning electron microscopy and testing the levels of bacterial reactive oxygen species. The effect of TTON on L-02 cells was evaluated. The results showed that the cell survival rates of L-02 cells treated with TTON at 0.05-0.25 μg/μL were all >90%. At each concentration, the total apoptosis rate of L-02 cells was <10%. These results indicated the high biocompatibility and biological safety of TTON. Therefore, the preparation of TTO into a nanoemulsion can improve its bioavailability, which has positive implications for further applications of TTO.

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Preparation and characterization of long-term antibacterial and pH-responsive Polylactic acid/Octenyl succinic anhydride-chitosan @ tea tree oil microcapsules

Cited by 24 publications

References 47 publications

Effect of maltodextrin on the oxidative stability of ultrasonically induced soybean oil bodies microcapsules

Effect of maltodextrin on the oxidative stability of ultrasonically induced soybean oil bodies microcapsules

Sulfide-Ion-Responsive Mesoporous Silica/ZIF-8 Nanocapsules to Inhibit Microbiologically Influenced Corrosion

Preparation of tea tree oil nanoemulsion: Characterisation, antibacterial mechanism and evaluation of apoptosis

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