Colloidal stabilization of CeO2 nanomaterials with polyacrylic acid, polyvinyl alcohol or natural organic matter

Dippon, Urs; Pabst, Silke; Klitzke, Sondra

doi:10.1016/j.scitotenv.2018.07.189

Cited by 24 publications

(7 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar results were found for NM-212 in this study (Section S3 † ) and in previous works with static DLS. 72 The presence of large agglomerates was ascribed to an ineffective re-suspension of nanoceria powder into water during the preparation of CNPs (paragraph 2.1) and to unfavourable pH of the system. Stabilisation of dispersion by electrostatic repulsion is usually achieved when their zeta-potential is >30 mV, which is not the case for the suspensions used in this work.…”

Section: Resultsmentioning

confidence: 99%

Recovery of rare earth elements by nanometric CeO₂ embedded into electrospun PVA nanofibres

et al. 2021

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Recovery of rare earth elements by nanometric CeO₂ embedded into electrospun PVA nanofibres

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In order to stabilize particle suspensions, particles can be coated using polymers with strong charges or uncharged polymers, which could stabilize the nanoparticles by electrostatic stabilization or steric stabilization. PVA, as an uncharged and relatively hydrophilic polymer, have been widely applied as a stabilizer by steric stabilization …”

Section: Resultsmentioning

confidence: 99%

Propranolol‐Loaded Mesoporous Silica Nanoparticles for Treatment of Infantile Hemangiomas

Wang

Zheng

et al. 2019

Adv Healthcare Materials

View full text Add to dashboard Cite

birth-weight, and premature infants. [3] The cause of IH onset has not been well elucidated, but IH has proven to be a disorder of angiogenesis and vasculogenesis with excessive proliferation of microvessels. [4] IH is often characterized by unique growth pattern with rapid proliferating phrase followed by spontaneous involution. [5] Due to the benign nature and tendency to resolve spontaneously, a "wait and see" strategy persisted in the past. However, some untreated IH will leave permanent changes, such as telangiectasias, scarring, skin atrophy, and fibro-fatty residual. Furthermore, about 10% of IH are destructive and problematic with the increasing risk for disfigurement and functional impairment. [6] Therefore, more active management in IH therapy instead of observation are often suggested by pediatricians. Currently, there are mainly three kinds of treatment methods for IHs, including drug therapy, laser therapy, and surgery. The individual treatment plan should be made according to the location, extent, depth, and biological phrase of the lesion and techniques available. [7] Given the discovery of its remarkable efficacy in treating proliferating IH since 2008, beta-adrenergic receptor blocker propranolol (PRN) has been widely used as the first-line therapy for IH. A great number of clinical studies (including retrospective study, prospective study, and meta-analysis) demon strated the efficacy of PRN in treating IH. [8] However, the bioavailability of PRN therapy in IH is always unsatisfactory. Our group previously investigated the pharmacokinetics of propranolol, and discovered that the peak plasma concentration of PRN was 383 ng mL −1 after administration of 1 mg kg −1 propranolol, and the elimination half-life was about 6 h. [9] Furthermore, PRN therapy for IH has been controversial due to the side effects. Although the short-term side effects are usually selflimiting and easy to manage, [10] such as bradycardia, bronchospasm, hypotension, hypoglycemia, electrolyte disturbances, and diarrhea, concerns regarding long-term neurocognitive effects have been raised recently due to the potentiality to penetrate the blood-brain-barrier and affect the central nervous system. [11] Consequently, there is an urgency to develop new approaches that could elevate the bioavailability of propranolol, extend the circulation time and lower the systemic toxicity of the drug.With the rapid development in nanotechnology, it is expected that novel treatments based on nanomedicine would be applied in the clinical practice in the near future. In the way of Infantile hemangioma (IH) is one of the most common neoplasm of infancy.Although with the potential to involute slowly after proliferation, IH has several subsets that could develop severe complications and lead to functional impairment or permanent disfigurement. In the present study, a novel propranolol (PRN) delivery system is developed that encapsulated in mesoporous silica nanoparticles (MSN). The primary nanoparticles are further treated with polyvinyl alcohol (PVA) ...

show abstract

“…The half titration point of 𝜁 s /2 = −17.48 mV is found at pH 3.94 as indicated by the blue lines in Figure 5. At first glance, the presence of a strongly negative 𝜁 potential of the nano polypropylene without use of an anionic colloidal stabilizer such as sodium dodecyl sulfate [33] or poly(acrylic acid) [34] seems surprising. Therefore, we must assume that the negative 𝜁 potential is generated by the water itself interacting with the polypropylene nanoparticles.…”

Section: Zeta Potentialmentioning

confidence: 99%

Aqueous Dispersions of Polypropylene: Toward Reference Materials for Characterizing Nanoplastics

Hildebrandt

Thünemann

2023

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Microplastics and nanoplastics pollute the natural environment all over the world, but the full extent of the hazards posed by this waste is unclear. While research on microplastics is well advanced, little work has been done on nanoplastics. This discrepancy is mainly due to the lacking ability to detect nanoplastics in biologically and environmentally relevant matrices. Nanoplastics reference materials can help the development of suitable methods for identifying and quantifying nanoplastics in nature. The aim is to synthesize nanoplastics made from one of the most commonly used plastics, namely polypropylene. An easy way to produce long‐term stable aqueous dispersions of polypropylene nanoparticles (nano polypropylene) is reported. The nanoplastic particles, prepared by mechanical breakdown, show a mean hydrodynamic diameter of Dh = 180.5 ± 5.8 nm and a polydispersity index of PDI = 0.084 ± 0.02. No surfactant is needed to obtain dispersion which is stable for more than 6 months. The colloidal stability of the surfactant‐free nano polypropylene dispersions is explained by their low zeta potential of ζ = −43 ± 2 mV.

show abstract

Colloidal stabilization of CeO2 nanomaterials with polyacrylic acid, polyvinyl alcohol or natural organic matter

Cited by 24 publications

References 32 publications

Recovery of rare earth elements by nanometric CeO₂ embedded into electrospun PVA nanofibres

Recovery of rare earth elements by nanometric CeO₂ embedded into electrospun PVA nanofibres

Propranolol‐Loaded Mesoporous Silica Nanoparticles for Treatment of Infantile Hemangiomas

Aqueous Dispersions of Polypropylene: Toward Reference Materials for Characterizing Nanoplastics

Contact Info

Product

Resources

About

Colloidal stabilization of CeO2 nanomaterials with polyacrylic acid, polyvinyl alcohol or natural organic matter

Cited by 24 publications

References 32 publications

Recovery of rare earth elements by nanometric CeO2 embedded into electrospun PVA nanofibres

Recovery of rare earth elements by nanometric CeO2 embedded into electrospun PVA nanofibres

Propranolol‐Loaded Mesoporous Silica Nanoparticles for Treatment of Infantile Hemangiomas

Aqueous Dispersions of Polypropylene: Toward Reference Materials for Characterizing Nanoplastics

Contact Info

Product

Resources

About

Recovery of rare earth elements by nanometric CeO₂ embedded into electrospun PVA nanofibres

Recovery of rare earth elements by nanometric CeO₂ embedded into electrospun PVA nanofibres