Microencapsulation by<i>in situ</i>Polymerization of Amino Resins

Nguon, Olivier; Lagugné‐Labarthet, François; Brandys, Frank A.; Li, Jian; Gillies, Elizabeth R.

doi:10.1080/15583724.2017.1364765

Cited by 72 publications

(39 citation statements)

References 187 publications

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“…. The preparation of the nanocapsule formulation of the Eucalyptus extract was performed by in situ polymerization technique using emulsion based on the oilin-water method (35 (36). Next, 2 (g/ml) of Eucalyptus extract was added slowly and after 30 min, the pH of the solution was adjusted by sulfuric acid 1 N, until the poly urea-formaldehyde shell covers the particles of the extract.…”

Section: Preparation Of Eucalyptus Extract Nanocapsule Formulationmentioning

confidence: 99%

Synthesis of natural nanopesticides with the origin of Eucalyptus globulus extract for pest control

Khoshraftar

Safekordi

Shamel

et al. 2019

Green Chemistry Letters and Reviews

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Continued use of chemical insecticides causes toxicity to non-target organisms, pest resistance and environmental pollution around the world. Nanocapsules of botanical insecticides are a suitable alternative for this target. The major constituents of Eucalyptus extract were determined by GC-MS: 1,8-cineole (70.94%) and 1,2-benzenedicarboxylic acid (6.08%). The Characterization of nanocapsule was investigated by dynamic light scattering, Zeta potential, scanning electron microscope, optical microscope and FTIR. The mean particle size distribution of nanocapsule is 380 nm and zeta potential of −26.36 ± 5.31 mV was obtained. It could be observed that nanocapsules have a spherical shape. To determine the insecticides of the nanocapsule with loads Eucalyptus extract was impregnated with concentration (0, 10, 15, 25, 35, 50 mg/ml) for 12, 24 and 48-h after exposure. The results indicated, that over time encapsulation exposure from 12 to 48 h, the highest time was comparatively more susceptible (LC 50 = 14.93 mg/ml).

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Section: Preparation Of Eucalyptus Extract Nanocapsule Formulationmentioning

confidence: 99%

Synthesis of natural nanopesticides with the origin of Eucalyptus globulus extract for pest control

Khoshraftar

Safekordi

Shamel

et al. 2019

Green Chemistry Letters and Reviews

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“…Dispersion polycondensation: In the category, all the components including the monomer, the dispersant and the initiator are present in a solvent in which the polymer to be formed is insoluble. Here, swelling of the polymer occur leading to growth of microcapsules which is sustained by continued addition of monomer and oligomer [68]. Jiang and colleagues [69] used this method to prepare a core shell for site specific delivery of a small molecule, doxorubicin and a protein drug, TRAIL, for cancer therapy.…”

Section: In-situ Polymerizationmentioning

confidence: 99%

Natural Polymers in Micro- and Nanoencapsulation for Therapeutic and Diagnostic Applications: Part I: Lipids and Fabrication Techniques

Ngwuluka¹,

Abu-Thabit²,

Uwaezuoke³

et al. 2021

Nano- And Microencapsulation - Techniques and Applications

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Encapsulation, specifically microencapsulation is an old technology with increasing applications in pharmaceutical, agrochemical, environmental, food, and cosmetic spaces. In the past two decades, the advancements in the field of nanotechnology opened the door for applying the encapsulation technology at the nanoscale level. Nanoencapsulation is highly utilized in designing effective drug delivery systems (DDSs) due to the fact that delivery of the encapsulated therapeutic/diagnostic agents to various sites in the human body depends on the size of the nanoparticles. Compared to microencapsulation, nanoencapsulation has superior performance which can improve bioavailability, increase drug solubility, delay or control drug release and enhance active/passive targeting of bioactive agents to the sites of action. Encapsulation, either micro- or nanoencapsulation is employed for the conventional pharmaceuticals, biopharmaceuticals, biologics, or bioactive drugs from natural sources as well as for diagnostics such as biomarkers. The outcome of any encapsulation process depends on the technique employed and the encapsulating material. This chapter discusses in details (1) various physical, mechanical, thermal, chemical, and physicochemical encapsulation techniques, (2) types and classifications of natural polymers (polysaccharides, proteins, and lipids) as safer, biocompatible and biodegradable encapsulating materials, and (3) the recent advances in using lipids for therapeutic and diagnostic applications. Polysaccharides and proteins are covered in the second part of this chapter.

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“…In situ polymerization is a widely used industrial method to synthesize amino resin capsules for the paper industry [4], self-healing mate-rials [5][6][7], and thermal energy storage [8,9] to name a few. Such an encapsulation technique utilizes an oil-in-water (O/W) emulsion as a template and cross-links water soluble monomers to pro-duce precipitates, which deposit on the O/W interface to form polymer films encaging the oil droplets to form capsules eventually [10,11]. Produced polymer precipitates not only can deposit on the O/W interface but also can disperse excessively in the aqueous phase as a side product.…”

Section: Introductionmentioning

confidence: 99%

Improved volatile cargo retention and mechanical properties of capsules via sediment-free in situ polymerization with cross-linked poly(vinyl alcohol) as an emulsifier

Zhang

Mustapha

Zhang

et al. 2020

Journal of Colloid and Interface Science

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Hypothesis: It is hypothesized that poly(vinyl alcohol) (PVOH) as an emulsifier destabilizes the insoluble molecular aggregates by increasing interparticle interactions and their tendency toward agglomeration into large particle aggregates during the encapsulation process of one-step in situ polymerization. Porosity of capsule shells is expected to decrease with reducing agglomeration tendency to allow dense packing of smaller insoluble aggregates. Cross-linking the polymer network further reduces shell perme-ability to improve the retention of volatile cargos. PVOH also modifies the short-range order of polymer q The First Author gave a Young Investigator Perspective oral presentation at the 9th International Colloids Conference,

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Microencapsulation byin situPolymerization of Amino Resins

Cited by 72 publications

References 187 publications

Synthesis of natural nanopesticides with the origin of Eucalyptus globulus extract for pest control

Synthesis of natural nanopesticides with the origin of Eucalyptus globulus extract for pest control

Natural Polymers in Micro- and Nanoencapsulation for Therapeutic and Diagnostic Applications: Part I: Lipids and Fabrication Techniques

Improved volatile cargo retention and mechanical properties of capsules via sediment-free in situ polymerization with cross-linked poly(vinyl alcohol) as an emulsifier

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