scholarly journals Colloidal Dispersion of a Perfluorosulfonated Ionomer in Water–Methanol Mixtures

Polymers ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 72 ◽  
Author(s):  
◽  
◽  
Keyword(s):  
Colloidal Dispersion ◽  
Perfluorosulfonated Ionomer

scholarly journals Single-Step Green Synthesis of Highly Concentrated and Stable Colloidal Dispersion of Core-Shell Silver Nanoparticles and Their Antimicrobial and Ultra-High Catalytic Properties

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1007
Author(s):  
Azam Ali ◽  
Mariyam Sattar ◽  
Fiaz Hussain ◽  
Muhammad Humble Khalid Tareen ◽  
Jiri Militky ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Tannic Acid ◽  
Rate Constant ◽  
Catalytic Properties ◽  
Colloidal Dispersion ◽  
Alkaline Condition ◽  
Core Shell ◽  
Average Particle ◽  
Ag Nps

The versatile one-pot green synthesis of a highly concentrated and stable colloidal dispersion of silver nanoparticles (Ag NPs) was carried out using the self-assembled tannic acid without using any other hazardous chemicals. Tannic acid (Plant-based polyphenol) was used as a reducing and stabilizing agent for silver nitrate in a mild alkaline condition. The synthesized Ag NPs were characterized for their concentration, capping, size distribution, and shape. The experimental results confirmed the successful synthesis of nearly spherical and highly concentrated (2281 ppm) Ag NPs, capped with poly-tannic acid (Ag NPs-PTA). The average particle size of Ag NPs-PTA was found to be 9.90 ± 1.60 nm. The colloidal dispersion of synthesized nanoparticles was observed to be stable for more than 15 months in the ambient environment (25 °C, 65% relative humidity). The synthesized AgNPs-PTA showed an effective antimicrobial activity against Staphylococcus Aureus (ZOI 3.0 mM) and Escherichia coli (ZOI 3.5 mM). Ag NPs-PTA also exhibited enhanced catalytic properties. It reduces 4-nitrophenol into 4-aminophenol in the presence of NaBH4 with a normalized rate constant (Knor = K/m) of 615.04 mL·s−1·mg−1. For comparison, bare Ag NPs show catalytic activity with a normalized rate constant of 139.78 mL·s−1·mg−1. Furthermore, AgNPs-PTA were stable for more than 15 months under ambient conditions. The ultra-high catalytic and good antimicrobial properties can be attributed to the fine size and good aqueous stability of Ag NPs-PTA. The unique core-shell structure and ease of synthesis render the synthesized nanoparticles superior to others, with potential for large-scale applications, especially in the field of catalysis and medical.

scholarly journals Examination of literature on colloidal dispersion gels for oil recovery

2021 ◽  
Author(s):  
Dongmei Wang ◽  
Randall S. Seright
Keyword(s):  
Oil Recovery ◽  
Colloidal Dispersion

scholarly journals Effect of SnO2 Colloidal Dispersion Solution Concentration on the Quality of Perovskite Layer of Solar Cells

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 591
Author(s):  
Keke Song ◽  
Xiaoping Zou ◽  
Huiyin Zhang ◽  
Chunqian Zhang ◽  
Jin Cheng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
High Efficiency ◽  
Surface Condition ◽  
Perovskite Solar Cells ◽  
Colloidal Dispersion ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Perovskite Layer ◽  
Dispersion Solution

The electron transport layer (ETL) is critical to carrier extraction for perovskite solar cells (PSCs). Moreover, the morphology and surface condition of the ETL could influence the topography of the perovskite layer. ZnO, TiO2, and SnO2 were widely investigated as ETL materials. However, TiO2 requires a sintering process under high temperature and ZnO has the trouble of chemical instability. SnO2 possesses the advantages of low-temperature fabrication and high conductivity, which is critical to the performance of PSCs prepared under low temperature. Here, we optimized the morphology and property of SnO2 by modulating the concentration of a SnO2 colloidal dispersion solution. When adjusting the concentration of SnO2 colloidal dispersion solution to 5 wt.% (in water), SnO2 film indicated better performance and the perovskite film has a large grain size and smooth surface. Based on high efficiency (16.82%), the device keeps a low hysteresis index (0.23).

Poly(N-isopropylacrylamide)-Tethered Silicate Platelets for Colloidal Dispersion of Conjugated Polymers with Thermoresponsive and Photoluminescence Properties

Langmuir ◽  
2010 ◽  
Vol 26 (13) ◽  
pp. 10572-10577 ◽  
Author(s):  
Yi-Fen Lan ◽  
Bi-Zen Hsieh ◽  
Hsiao-Chu Lin ◽  
Yu-An Su ◽  
Ying-Nan Chan ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Colloidal Dispersion ◽  
Photoluminescence Properties

Synthesis and colloidal dispersion of nanocrystalline ferroelectric Nd-substituted Bi4Ti3O12 powder by mechanical alloying

2008 ◽  
Vol 59 (2) ◽  
pp. 143-146 ◽  
Author(s):  
Kyusuk Han ◽  
Taegyung Ko ◽  
Jaehee Oh
Keyword(s):  
Mechanical Alloying ◽  
Colloidal Dispersion

scholarly journals Amphotericin B in Colloidal Dispersion (Amphocil®) serum levels in infants with sistemic candidiasis 1436

1998 ◽  
Vol 43 ◽  
pp. 245-245
Author(s):  
Rubens Feferbaum ◽  
Vera Lúcia J Krebs ◽  
Sonia RCJ Santos ◽  
Edna MA Diniz ◽  
Ana Lucia S Galvani ◽  
...  
Keyword(s):  
Amphotericin B ◽  
Serum Levels ◽  
Colloidal Dispersion

scholarly journals Pharmacokinetics of Amphotericin B Colloidal Dispersion in Critically Ill Patients with Cholestatic Liver Disease

2012 ◽  
Vol 56 (10) ◽  
pp. 5414-5418 ◽  
Author(s):  
Stefan Weiler ◽  
Elisabeth Überlacher ◽  
Julia Schöfmann ◽  
Eva Stienecke ◽  
Stefan Dunzendorfer ◽  
...  
Keyword(s):  
Steady State ◽  
Liver Disease ◽  
Amphotericin B ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Normal Liver ◽  
Colloidal Dispersion ◽  
Cholestatic Liver Disease ◽  
Normal Liver Function ◽  
Standard Dosage

ABSTRACTThe pharmacokinetics of lipid-bound and liberated amphotericin B (AMB) was assessed in 11 critically ill patients with cholestatic liver disease (CSLD) and in 9 subjects with normal liver function treated with AMB colloidal dispersion (ABCD). Exposure to lipid-bound AMB was higher in patients with CSLD. Levels of liberated AMB were elevated by CSLD only after the first dose, whereas its pharmacokinetics was unaffected at steady state. The standard dosage of ABCD is probably adequate for patients with CSLD.

Bora Rice: Natural Polymer for Drug Delivery

2021 ◽  
Vol 7 (1) ◽  
pp. 2
Author(s):  
Kalyani Pathak ◽  
Ratna Jyoti Das ◽  
Riya Saikia ◽  
Aparoop Das ◽  
Mohammad Zaki Ahmad
Keyword(s):  
Drug Delivery ◽  
Cold Water ◽  
Food Additives ◽  
Physical Stability ◽  
Colloidal Dispersion ◽  
Delivery Systems ◽  
Rice Starch ◽  
Cancer Drug ◽  
Natural Polymers ◽  
Pharmaceutical Dosage Forms

Natural polymers play a vital part in the formulation of pharmaceutical dosage forms due to their use as excipients. Synthetic polymers have been introduced into drug delivery recently; the usage of natural polymers in drug delivery research continues to rise. It is not surprising that applications other than its caloric value have been found for starch. Various natural sources of the polymer have been investigated for delivery systems; among them, Assam Bora rice starch seems to be a promising candidate due to its interesting properties such as being non-toxic, biocompatible, biodegradable, mucoadhesive, and non-immunogenic. Assam Bora rice, locally known as Bora Chaul, was first introduced in Assam, India, from Thailand or Myanmar by Thai-Ahom, now widely cultivated throughout the Assam. The starch obtained from Assam Bora rice is characterized by its high amylopectin content (i.e., >95%) with a branched, waxy polymer which shows physical stability and resistance towards enzymatic action. Assam Bora rice starch hydrates and swells in cold water, forming viscous colloidal dispersion or sols responsible for its bioadhesive nature. Moreover, it is degraded by colonic bacteria but remains undigested in the upper GIT. Due to the excellent adhesion and gelling capability, it is often selected as a mucoadhesive matrix in a controlled release drug delivery system. Carboxymethyl Assam Bora rice starch has also been applied for SPIONs stabilization and, further, it can effectively bind and load cationic anti-cancer drug molecule, Doxorubicin hydrochloride (DOX), via electrostatic interaction. This article provides a critical assessment of Assam Bora rice literature and shows how the rice can be used in many ways, from food additives to drug delivery systems.

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