Synthesis and characterization of imidacloprid microspheres for controlled drug release study

Zheng, Qiaohong; Niu, Yongsheng; Li, Hongchun

doi:10.1016/j.reactfunctpolym.2016.07.006

Cited by 14 publications

(10 citation statements)

References 16 publications

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“…As shown in Figure 3, three major bands (2950-3700, 1600-1810 and 1000-1350 cm -1 ) and some fingerprint bands (500-1000 cm -1 ) appeared in the spectra of the two layers, plus a few extra bands (~1560 and 1050 cm -1 ) in the shape-memory layer. These major bands were composite due to the multi-component composition in the reactor, spectroscopically corresponding to the stretching vibration of O-H (N-H), C=O and C-N (C-C) bonds and their rotation/bending in the two layers [26,27], plus extra S=O bands [28] in the shape-memory layer. These absorption bands involved in the two layers may be ascribed to the constituent monomers (i.e., 2-acrylamido-2-methylpropane-sulfonic acid and 2-nonenoic acid in the first layer and acrylamide in the second layer) which all included O-H (N-H), C=O, and C-N (C-C) bonds.…”

Section: Results and Discussion 31 Ftir Tem Eds And Spr Analysesmentioning

confidence: 99%

Artificial reactor containing polymeric bilayer architectures for the formation of self-controlled tandem catalytic-ability

Xia¹,

Wei²,

Zhu³

et al. 2020

Express Polym. Lett.

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For addressing the present challenges in tandem catalysts, an artificial reactor capable of self-controlled tandem catalytic-ability was reported in this study. Inspired from the polymeric properties and divisional isolation for tandem processes in natural biological systems, this reactor was fabricated with polymeric bilayer architectures. The first layer was made of a reactive shape memory polymer that contained thermosensitive polymeric networks, acting as a molecular switch for the occurrence of the precedent hydrolysis of bis(4-nitrophenyl)carbonate. The second layer consisted of a molecularly-imprinted polymer and encapsulated Ag nanoparticles, allowing access to the succeeding reduction of the intermediate 4-nitrophenol. In a cooperative way, the polymeric bilayer architectures planted in this artificial reactor led to the formation of self-controlled tandem catalytic-ability. The suggested design for this artificial reactor shares a promising prospect with the struggling tandem catalysts, which leads to opportunities to develop controllable tandem processes.

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Section: Results and Discussion 31 Ftir Tem Eds And Spr Analysesmentioning

confidence: 99%

Artificial reactor containing polymeric bilayer architectures for the formation of self-controlled tandem catalytic-ability

Xia¹,

Wei²,

Zhu³

et al. 2020

Express Polym. Lett.

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“…The schematic diagram of the preparation process of the proposed composite nanoparticles is shown in Figure . The composite nanoparticles were prepared using the W/O/W solvent evaporation technique. , The 24-EBL (28 mg) was dissolved in acetone (4 mL) and water (3 mL) as the internal water phase. Polymers (RS 32.5 mg/RL 7.5 mg and PHA 112.5 mg) and IMI (150 mg) were dissolved in 5 mL of dichloromethane to form a polymer solution as the oil phase.…”

Section: Methodsmentioning

confidence: 99%

“…32 The particle size distribution (Figure 2d) conforms to the normal distribution, with an average particle size of 502.03 ± 114.85 nm. Compared with IMI-controlled release formulation 11,12,20,33 and 24-EBL-controlled release formulation, 34,35 the size of the composite nanoparticles was even smaller than that of some single pesticide nanoparticles.…”

Section: Morphology and Size Distribution Of Thementioning

confidence: 96%

New Formulation to Accelerate the Degradation of Pesticide Residues: Composite Nanoparticles of Imidacloprid and 24-Epibrassinolide

Zhao

Song

et al. 2022

ACS Omega

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Pest control effectiveness and residues of pesticides are contradictory concerns in agriculture and environmental conservation. On the premise of not affecting the insecticidal effect, the pesticide residues in the later stage should be degraded as fast as possible. In the present study, composite nanoparticles in a double-layer structure, consisting of imidacloprid (IMI) in the outer layer and plant hormone 24-epibrassinolide (24-EBL) in the inner layer, were prepared by the W/O/W solvent evaporation method using Eudragit RL/RS and polyhydroxyalkanoate as wall materials. The release of IMI in the outer layer was faster and reached the maximum within 24 h, while the release of 24-EBL in the inner layer was slower and reached the maximum within 96 h. The contact angle of the composite nanoparticles was half that of the 5% IMI emulsifiable concentrate (EC), and the deposition of composite nanoparticles on rice was twice that of 5% IMI EC, which increased the pesticide utilization efficiency. Compared with the common pesticide, 5% IMI EC, the insecticidal effect of the composite nanoparticles was stronger than that of planthoppers, with a much lower final residue amount on rice after 21 days. The composite nanoparticles prepared in this study to achieve sustained release of pesticides and, meanwhile, accelerate the degradation of pesticide residues have a strong application potential in agriculture for controlling pests and promoting crop growth.

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“…This nanoparticle can effectively improve the prognosis of pancreatic cancer by overcoming chemotherapy resistance and reducing systemic toxicity. Meanwhile, drug carriers of PPC with other modifications have also been reported, which are normally prepared by electrospinning, melt blending and emulsification and solvent evaporation [ 14 , 123 , 124 ]. An example is given in Figure 7 b. Li and co-workers fabricated PPC-loaded imidacloprid microspheres by emulsion solvent evaporation [ 14 ].…”

Section: Biomedical Applications Of Ppcmentioning

confidence: 99%

“…At present, PPC has been extensively used in food packaging [ 7 , 8 ], battery manufacturing [ 9 , 10 ], agricultural mulch films [ 11 ] and cushioning foams [ 12 ], etc. In addition, owing to its good biocompatibility and non-toxic degradation products, PPC also holds significant promise for biomedical applications, such as drug carriers [ 13 , 14 ], tissue engineering scaffolds [ 15 , 16 ] and medical dressings [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Poly(Propylene Carbonate)-Based Biodegradable and Environment-Friendly Materials for Biomedical Applications

Wang,

Li,

Yang

et al. 2024

IJMS

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Poly(propylene carbonate) (PPC) is an emerging “carbon fixation” polymer that holds the potential to become a “biomaterial of choice” in healthcare owing to its good biocompatibility, tunable biodegradability and safe degradation products. However, the commercialization and wide application of PPC as a biomedical material are still hindered by its narrow processing temperature range, poor mechanical properties and hydrophobic nature. Over recent decades, several physical, chemical and biological modifications of PPC have been achieved by introducing biocompatible polymers, inorganic ions or small molecules, which can endow PPC with better cytocompatibility and desirable biodegradability, and thus enable various applications. Indeed, a variety of PPC-based degradable materials have been used in medical applications including medical masks, surgical gowns, drug carriers, wound dressings, implants and scaffolds. In this review, the molecular structure, catalysts for synthesis, properties and modifications of PPC are discussed. Recent biomedical applications of PPC-based biomaterials are highlighted and summarized.

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Synthesis and characterization of imidacloprid microspheres for controlled drug release study

Cited by 14 publications

References 16 publications

Artificial reactor containing polymeric bilayer architectures for the formation of self-controlled tandem catalytic-ability

Artificial reactor containing polymeric bilayer architectures for the formation of self-controlled tandem catalytic-ability

New Formulation to Accelerate the Degradation of Pesticide Residues: Composite Nanoparticles of Imidacloprid and 24-Epibrassinolide

Poly(Propylene Carbonate)-Based Biodegradable and Environment-Friendly Materials for Biomedical Applications

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