Advances in chitosan-based microcapsules and their applications

Meng, Qingye; Zhong, Shuangling; Wang, Jia; Gao, Yan; Cui, Xuejun

doi:10.1016/j.carbpol.2022.120265

Cited by 47 publications

(14 citation statements)

References 119 publications

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“…42 In this regard, the natural polysaccharides, due to their biocompatibility and biodegradability, are introduced as the best candidates for biomedical applications. [43][44][45] Also, the multilayer microcapsules can load the drug and release it in a controlled manner under a specific external stimulus, such as temperature, 46 electricity, 47,48 ultrasound, 49,50 light or laser irradiation 51,52 using the magnetic fields 53,54 to achieve an improved treatment outcome. Among these, the laser irradiation, particularly in the near-infrared (NIR) light region (800-1200 nm), is more suited for the microcapsule opening, as it can be easily transmitted through the body, due to its lower absorption and scattering in tissues with fine spatial control over intensity.…”

Section: Introductionmentioning

confidence: 99%

A novel magnetically guided, oxygen propelled CoPt/Au nanosheet motor in conjugation with a multilayer hollow microcapsule for effective drug delivery and light triggered drug release

Kariminia,

Shamsipur,

Mansouri

2024

J. Mater. Chem. B

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Section: Introductionmentioning

confidence: 99%

A novel magnetically guided, oxygen propelled CoPt/Au nanosheet motor in conjugation with a multilayer hollow microcapsule for effective drug delivery and light triggered drug release

Kariminia,

Shamsipur,

Mansouri

2024

J. Mater. Chem. B

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“…First, CS is a natural polysaccharide with low manufacturing costs and good biodegradability, thus it is an outstanding wall material. [28][29][30] Second, LS is also a renewable natural biopolymer with good antioxidant and biodegradable capabilities and enhanced UV-shielding properties, and is a by-product of industrial pulping with an annual output of 50 000 tons and low cost. [31][32][33][34][35] Third, LS has excellent coordination abilities to metal ions.…”

Section: Introductionmentioning

confidence: 99%

Photothermal controlled‐release microcapsule pesticide delivery systems constructed with sodium lignosulfonate and transition metal ions: construction, efficacy and on‐demand pesticide delivery

Huang,

Jiang

2024

Pest Management Science

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BACKGROUNDWidespread application of controlled‐release pesticide delivery systems is a feasible and effective method to improve the utilization efficiency of pesticides. However, owing to the high cost and complicated preparation technologies of controlled‐release pesticide delivery systems, their applications in agricultural production have been seriously hindered.RESULTSThis study aimed to construct inexpensive photothermally controlled‐release pesticide delivery systems using chitosan (CS) and sodium lignosulfonate (LS) as the wall materials, and a coordination assembly strategy of LS with transition metal ions to encapsulate a model pesticide, avermectin (AVM). The resulting complex or nanoparticle photothermal layers in these systems effectively achieved photothermal conversions, and replaced the use of common photothermal agents. In the prepared pesticide‐delivery systems, two systems had remarkable photothermal conversion performance and photothermal stabilities with a photothermal conversion efficiency (η) of 24.03% and 28.82%, respectively, under 808 nm, 2 W near‐infrared irradiation. The slow‐release and ultraviolet‐shielding performance of these two systems were markedly enhanced compared with other formulations. The insecticidal activities of these two systems against Plutella xylostella under irradiation with light‐emitting diode (LED)‐simulated sunlight were also enhanced by 5.20‐ and 5.06‐fold, respectively, compared with that without irradiation of LED‐simulated sunlight.CONCLUSIONBecause of their convenient preparations, inexpensive and renewable raw materials, and excellent photothermally controlled‐release performance, these on‐demand pesticide delivery systems might have significant potential in improving the utilization efficiency of pesticides in modern agriculture. © 2024 Society of Chemical Industry.

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“…At higher pH values, the polymer is insoluble. This dependence of solubility on pH allows for the use of chitosan in various forms: solutions, suspensions, nanoparticles [ 17 ], bionanocomposites [ 18 ], gels [ 19 , 20 , 21 , 22 ], capsules [ 23 ], films, membranes [ 24 ], fibers [ 25 ], etc. The solubility of chitosan in slightly acidic aqueous solutions increases significantly with a decrease in molecular weight and an increase in the degree of deacetylation [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Heterogeneous Alkaline Deacetylation of Chitin: A Review

et al. 2023

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This review provides an analysis of experimental results on the study of alkaline heterogeneous deacetylation of chitin obtained by the authors and also published in the literature. A detailed analysis of the reaction kinetics was carried out considering the influence of numerous factors: reaction reversibility, crystallinity and porosity of chitin, changes in chitin morphology during washing, alkali concentration, diffusion of hydroxide ions, and hydration of reacting particles. A mechanism for the chitin deacetylation reaction is proposed, taking into account its kinetic features in which the decisive role is assigned to the effects of hydration. It has been shown that the rate of chitin deacetylation increases with a decrease in the degree of hydration of hydroxide ions in a concentrated alkali solution. When the alkali concentration is less than the limit of complete hydration, the reaction practically does not occur. Hypotheses have been put forward to explain the decrease in the rate of the reaction in the second flat portion of the kinetic curve. The first hypothesis is the formation of “free” water, leading to the hydration of chitin molecules and a decrease in the reaction rate. The second hypothesis postulates the formation of a stable amide anion of chitosan, which prevents the nucleophilic attack of the chitin macromolecule by hydroxide ions.

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Advances in chitosan-based microcapsules and their applications

Cited by 47 publications

References 119 publications

A novel magnetically guided, oxygen propelled CoPt/Au nanosheet motor in conjugation with a multilayer hollow microcapsule for effective drug delivery and light triggered drug release

A novel magnetically guided, oxygen propelled CoPt/Au nanosheet motor in conjugation with a multilayer hollow microcapsule for effective drug delivery and light triggered drug release

Photothermal controlled‐release microcapsule pesticide delivery systems constructed with sodium lignosulfonate and transition metal ions: construction, efficacy and on‐demand pesticide delivery

Mechanism of Heterogeneous Alkaline Deacetylation of Chitin: A Review

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