Modification of acrylic bone cements by poly(ethylene glycol) with different molecular weight

Król, Klaudia; Pielichowska, Kinga

doi:10.1002/pat.3792

Cited by 11 publications

(7 citation statements)

References 42 publications

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“…After active ingredients were removed with methanol, the MCs became softer, and the MCs were more likely to become dented and collapse, thereby affecting the release performance of the MCs. This result is similar to the conclusion proposed by Król and Pielichowska, who showed that the use of PEG modifications of different molecular weights can considerably decrease the mechanical strength of bone cement 28 . As shown in A3, B3, C3 and D3, the MCs prepared with PEG200, PEG400, PEG800 and PEG1500 had similar particle sizes of approximately 5 μm.…”

Section: Resultssupporting

confidence: 90%

Improving the efficacy against crop foliage disease by regulating fungicide adhesion on leaves with soft microcapsules

Pan

Cao

et al. 2021

Pest Management Science

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BACKGROUND Increasing pesticide retention on crop leaves is a key approach for guaranteeing efficacy when products are applied to foliage. Evidently, the formulation plays an important role in this process. Microcapsules (MCs) are a promising formulation, but whether and how their adhesion to the leaf surface affects retention and efficacy is not well understood. RESULTS In this study, we found that the incorporation of polyethylene glycol (PEG) with different molecular weights into the MC shell affects the release profile of MCs and the contact area of these MCs to leaves by changing their softness. The cumulative release rates of pyraclostrobin (Pyr) MCs fabricated with PEG200, PEG400, PEG800 and PEG1500 were 80.61%, 90.98%, 94.07% and 97.40%, respectively. Scanning electron microscopy observations showed that the flexibility of the MCs increased with increasing PEG molecular weight. The median lethal concentration (LC50) of the MCs with different PEG to the zebrafish were 12.10, 8.10, 3.90 and 1.46 mg L−1, respectively, which also indirectly reflected their release rate. Rainwater had less influence on the retention of the MCs prepared with PEG1500 than with the other PEG, which indicates a better adhesion to the target leave surfaces. MCs with the highest residual efficacy had better control efficacy on peanut leaf spot in field trials. CONCLUSION Overall, adding PEG with an appropriate molecular weight to the MC shell can regulate the structure of the MC shell to improve the affinity between the MCs and leaves, which further improves the utilization of pesticides and reduces the environmental risks of pesticides. © 2021 Society of Chemical Industry.

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Section: Resultssupporting

confidence: 90%

Improving the efficacy against crop foliage disease by regulating fungicide adhesion on leaves with soft microcapsules

Pan

Cao

et al. 2021

Pest Management Science

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“…Finally, some developments have sought to reduce the polymerization temperature of the bone cement mixture. For example, by including poly(ethylene glycol) (PEG) to the blend, the heat of polymerization is absorbed by the PEG, reducing the overall temperature of the treatment (Król & Pielichowska, 2016). (Leggat, Smith, & Kedjarune, 2007;Pascual et al, 1999).…”

Section: Improvements For Bone Cementmentioning

confidence: 99%

Modification of relevant polymeric materials for medical applications and devices

Velazco‐Medel¹,

Camacho‐Cruz²,

Bucio³

2020

Med Devices & Sens

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The present review compiles different biomedical relevant polymers that have been modified to enhance their properties, giving hydrophilicity to their surfaces, antifouling properties to avoid bacterial adhesion, biocompatibility, incorporation of drug delivery systems and the improving of their mechanical properties to use them in the manufacturing of medical devices as prosthesis or implants, or other medical applications as wound dressers or scaffolds to cell culture. Other content of this work is a general description of the different techniques to modify and graft molecules, biomolecules and other polymers onto polymeric matrices in order to obtain highperformance biomaterials and medical devices.

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“…[1][2][3] The use of nonbiodegradable materials may cause deterioration of surrounding bone tissue leading to repeated surgeries and long inflammatory response due to fragmentation and particulate formation. Several research efforts have been focused on the development of biodegradable polymers and bone cements [4][5][6][7][8] ; however, most of these medical devices are made of biodegradable polyesters and polyanhydrides, which are semicrystalline thermoplastics. These polymers have limited applications in such areas as in situ orthopedic bone filling and fixation and soft tissue repairs because they cannot be processed into the desired shapes and forms during surgery.…”

Section: Introductionmentioning

confidence: 99%

Syntheses of biodegradable polymer networks based on polycaprolactone and glutamic acid

Park

Kim

et al. 2018

Polymers for Advanced Techs

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Biodegradable trifunctional oligomer was synthesized from polycaprolactone and glutamic acid and characterized by Fourier‐transform infrared (FTIR) and proton nuclear magnetic resonance (1H NMR) spectroscopies. Injectable and in situ crosslinkable polymer networks were fabricated by the copolymerization of oligomer with triethylene glycol dimethacrylate (TEGDMA) and used to evaluate the initial compressive strengths, viscosities, shrinkages, thermal stabilities, and biodegradabilities in the forms of polymer network neat resin and their composites with β‐tricalcium phosphate. The initial compressive strengths (CS) values of neat resins ranged from 9.54 to 187.6 MPa. Both neat resins and composites had polymerization shrinkage ranging from 0% to 11.7%, which increased with increasing of TEGDMA contents in resin. Moreover, in polymer composite resins, shrinkage values decreased with increasing filler level from 0% to 4.6%, and exothermic evolution values decreased from 33.5°C to 29.7°C as increasing filler level. The composite with the formulation of (polycaprolactone)‐glutamate triacrylate (PCLGTA)/TEGDMA (25/75) and powder/liquid (P/L) ratio of 1.0 exhibited the highest exothermal and lowest shrinkage values. The increase of oligomer in the formulation led to an increase in viscosity.

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Modification of acrylic bone cements by poly(ethylene glycol) with different molecular weight

Cited by 11 publications

References 42 publications

Improving the efficacy against crop foliage disease by regulating fungicide adhesion on leaves with soft microcapsules

Improving the efficacy against crop foliage disease by regulating fungicide adhesion on leaves with soft microcapsules

Modification of relevant polymeric materials for medical applications and devices

Syntheses of biodegradable polymer networks based on polycaprolactone and glutamic acid

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