Biobased Polymer Composites Derived from Corn Stover and Feather Meals as Double-Coating Materials for Controlled-Release and Water-Retention Urea Fertilizers

2013 ◽  
Vol 61 (34) ◽  
pp. 8166-8174 ◽  
Author(s):  
Yuechao Yang ◽  
Zhaohui Tong ◽  
Yuqing Geng ◽  
Yuncong Li ◽  
Min Zhang
Keyword(s):  
Controlled Release ◽  
Polymer Composites ◽  
Corn Stover ◽  
Water Retention ◽  
Coating Materials ◽  
Double Coating

Sulfur polymer composites as controlled-release fertilisers

2019 ◽  
Vol 17 (7) ◽  
pp. 1929-1936 ◽  
Author(s):  
Maximilian Mann ◽  
Jessica E. Kruger ◽  
Firas Andari ◽  
Joshua McErlean ◽  
Jason R. Gascooke ◽  
...  
Keyword(s):  
Controlled Release ◽  
Polymer Composites ◽  
Canola Oil

A controlled-release fertiliser was prepared by the inverse vulcanisation of canola oil in the presence of nitrogen, phosphorous and potassium nutrients.

scholarly journals Polymer Composites Containing Gated Mesoporous Materials for On-Command Controlled Release

2014 ◽  
Vol 6 (9) ◽  
pp. 6453-6460 ◽  
Author(s):  
Carolina Acosta ◽  
Edgar Pérez-Esteve ◽  
Carlos A. Fuenmayor ◽  
Simona Benedetti ◽  
Maria Stella Cosio ◽  
...  
Keyword(s):  
Controlled Release ◽  
Polymer Composites ◽  
Mesoporous Materials

scholarly journals Oral Controlled Delivery of Natural Compounds Using Food-Grade Polymer Microparticles

2020 ◽  
Vol 01 ◽  
Author(s):  
Claudia Curcio ◽  
Angela Bonaccorso ◽  
Teresa Musumeci ◽  
Rosario Pignatello
Keyword(s):  
Drug Delivery ◽  
Controlled Release ◽  
Targeted Drug Delivery ◽  
Polymeric Materials ◽  
Herbal Remedies ◽  
Ph Change ◽  
Coating Materials ◽  
Food Grade ◽  
Targeted Drug

Background:: targeted drug delivery to colon is a strategical approach for the local cure of inflammation bowel diseases (IBD) and other syndromes like colon cancer. Research is actively focusing on possible alternative and safer therapies to conventional drugs, based on herbal remedies and other natural products. In particular, colon-targeted drug delivery systems (CDDS) offer the opportunity to protect the active compound along the way to the colon. Drug release and absorption, and even degradation should not occur in the stomach and small bowel, but a selective release should star once the system moves to the colonic area. Objective:: this work aims at evaluating the gastro-resistant properties of new food-grade methacrylic resins (Eudraguard®), used not as coating materials, but after the formation of microparticles, to achieve a delayed and targeted release of a model drug, resveratrol (RVT), to the ileo-colonic area. Methods:: microparticles were produced by an emulsion-solvent evaporation technique (ESE) and characterized by solid-state analytical methods. RVT release profiles were assessed in vitro using a pH-change procedure, able to simulate the transit of the carrier along the gastro-intestinal tract. Results:: Eudraguard® Biotic can form microparticles with a very high encapsulation efficiency for RVT; the polymeric matrix is able to limit the diffusion of the drug at gastric and gut pH conditions, while a higher release was achieved at pH 7.4. Conversely, using the Eudraguard® Control resin, alone or blended with the former polymer, did not allow to achieve a controlled release of RVT at the various pH values. Conclusion:: food-grade Eudraguard® matrices can be proposed, and would deserve further investigations, as polymeric materials for the preparation of micrometric matrices or pellets for the oral controlled release of natural active ingredients to the ileo-colonic area.

Zincated Nanoclay Polymer Composites (ZNCPCs): Synthesis, Characterization, Biodegradation and Controlled Release Behaviour in Soil

2018 ◽  
Vol 57 (17) ◽  
pp. 1760-1770 ◽  
Author(s):  
Nintu Mandal ◽  
S. C. Datta ◽  
K. M. Manjaiah ◽  
B. S. Dwivedi ◽  
R. Kumar ◽  
...  
Keyword(s):  
Controlled Release ◽  
Polymer Composites

scholarly journals Quartz Crystal Microbalance Based Sensor Arrays for Detection and Discrimination of VOCs Using Phosphonium Ionic Liquid Composites

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 615
Author(s):  
Stephanie R. Vaughan ◽  
Rocío L. Pérez ◽  
Pratap Chhotaray ◽  
Isiah M. Warner
Keyword(s):  
Polymer Composites ◽  
Quartz Crystal ◽  
Sensor Arrays ◽  
Coating Materials ◽  
Chlorinated Volatile Organic Compounds ◽  
Vapor Sensing ◽  
Phosphonium Ionic Liquid ◽  
Volatile Organic ◽  
Increase In Accuracy ◽  
Insight Into

Herein, we examine two sensing schemes for detection and discrimination of chlorinated volatile organic compounds (VOCs). In this work, phosphonium ionic liquids (ILs) were synthesized and vapor sensing properties examined and compared to phosphonium IL-polymer composites. Pure IL sensors were used to develop a QCM-based multisensory array (MSA), while IL-polymer composites were used to develop an MSA and virtual sensor arrays (VSAs). It was found that by employing the composite MSA, five chlorinated VOCs were accurately discriminated at 95.56%, which was an increase in accuracy as compared to pure ILs MSA (84.45%). Data acquired with two out of three VSAs allowed discrimination of chlorinated VOCs with 100% accuracy. These studies have provided greater insight into the benefits of incorporating polymers in coating materials for enhanced discrimination accuracies of QCM-based sensor arrays. To the best of our knowledge, this is the first report of a QCM-based VSA for discrimination of closely related chlorinated VOCs.

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