Novel Strategy for Antifouling Paints with Zero Endocrine Disrupting Chemical (EDC) Elution based on Interpenetrating Polymer Networks (IPNs)

2005 ◽  
Vol 873 ◽  
Author(s):  
Masanobu Naito ◽  
Takashi Nakai ◽  
Takuma Kawabe ◽  
Kenji Mori ◽  
Daisuke Furuta ◽  
...  
Keyword(s):  
Polymer Networks ◽  
Three Dimensional ◽  
Silica Matrix ◽  
Interpenetrating Polymer Networks ◽  
Repellent Activity ◽  
Antifouling Paints ◽  
Endocrine Disrupting Chemical ◽  
Endocrine Disrupting ◽  
Novel Strategy ◽  
Fouling Organisms

AbstractEnvironmentally friendly organic-inorganic hybrid materials with repellent activity against marine fouling organisms have been developed using interpenetrating polymer networks (IPNs), composed of a three-dimensional silica matrix of tetraethoxysilane (TEOS) and chain-like polymers, such as poly(methylmethacrylate) (PMMA) and poly(vinylacetate) (PVAc). The repellent activity of the IPNs reached a maximum of approximately 90% relative to that of tetrabutyl tin oxide (TBTO). Simple bioassays using blue mussels and algae were used to screen out the adequate proportions of those components.

Novel Approach for Biofouling-Release Materials with Interpenetrating Polymer Networks

2005 ◽  
Vol 897 ◽  
Author(s):  
Kenji Mori ◽  
Masanobu Naito ◽  
Takashi Nakai ◽  
Michiya Fujiki ◽  
Takuma Kawabe
Keyword(s):  
Blue Mussel ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Repellent Activity ◽  
Marine Fouling ◽  
3 Dimensional ◽  
Blue Mussels ◽  
Novel Approach ◽  
Specific Fraction ◽  
Fouling Organisms

AbstractEnvironmentally friendly organic-inorganic hybrid materials with repellent activity against marine fouling organisms, such as blue mussel, have been developed using interpenetrating polymer networks (IPNs), composed of a 3-dimensional siloxane matrix of tetraethoxysilane (TEOS) and poly(vinylacetate) (PVAc). Facile bioassay using blue mussels allowed screening the adequate proportions of those components. The repellent activity of IPN with PVAc/silica reached approximately 90% at a specific fraction, relative to that of tributyl tin oxide (TBTO). On the other hand, poly(methylmethacrylate)(PMMA) /silica composite did not show marked repellent activity against blue mussel, even though chemical structure of MMA is similar to that of vinylacetate.

scholarly journals Three-dimensional Hydrogels of Alginate/chitosan Semi-interpenetrating Polymer Networks and Nanocelluloses

2021 ◽  
Author(s):  
Priscila Siqueira ◽  
Ana de Lima ◽  
Felipe Medeiros ◽  
Augusta Isaac ◽  
Katia Novack ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dimensional Stability ◽  
Cellulose Nanocrystals ◽  
Biomedical Applications ◽  
Cellulose Nanofibers ◽  
Polymer Networks ◽  
Three Dimensional ◽  
Controlled Drug Release ◽  
Interpenetrating Polymer Networks ◽  
Post Treatment

Abstract The hydrogels are advanced materials used in biomedical applications during wound healing, controlled drug release and to prepare scaffolds. In this work are prepared hydrogels of alginate/chitosan (Alg/Ch) semi-interpenetrating polymer networks (semi-IPN’s) and nanocelluloses. The hydrogels after preparation by freeze drying are namely simply as gels. The cellulose nanocrystals (CNC’s) are obtained from acid hydrolysis of bleached Eucalyptus pulps and oxidized cellulose nanocrystals (CNCT’s) prepared by (2,2,6,6-tetramethylpiperidin-1-yl)oxyl radical catalyzed reaction as known as TEMPO reaction. The cellulose nanofibers (NFC’s) are obtained from mechanical shearing of cellulose pulps and oxidized NFC’s by TEMPO-mediated reaction (NFCT’s). The nanocellulose suspension and gels are characterized by FTIR at ATR mode, TGA, XRD, TEM, SEM, X-ray computed microtomography (micro-CT) and DMTA. The addition of CNC’s, NFC’s, CNCT’s or NFCT’s in the microstructure of gels increases their dimensional stabilities. The best results are obtained when CNCT’s and NFCT’s are added. The mechanical properties and dimensional stability of Alg/Ch semi-IPN’s increase after controlled thermal post-treatment. The heating during thermal post-treatment boosts the physicochemical interactions in the microstructures of semi-IPN’s. The biological assays show biocompatibility of fibroblast cells on the substrates, and differentiation and proliferation up seven days. The optimized mechanical properties, dimensional stability and biocompatibility of the gels studied in this work are important parameters for potential biomedical applications of these biomaterials.

Modelling Stress Softening and Necking Phenomena in Double Network Hydrogels

2019 ◽  
Author(s):  
Vahid Morovati ◽  
Mohammad Ali Saadat ◽  
Roozbeh Dargazany
Keyword(s):  
Polymer Networks ◽  
Three Dimensional ◽  
Interpenetrating Polymer Networks ◽  
Biological Applications ◽  
Inelastic Behavior ◽  
Interpenetrating Networks ◽  
Double Network ◽  
Stress Softening ◽  
Proposed Model ◽  
Damage Process

Abstract Double network (DN) gels are three-dimensional polymer matrices formed by interpenetrating networks. In contrast to the conventional single-network gels, DN gels have significant toughness, which makes them a promising material for different biomedical and biological applications. However, DN gels show complicated inelastic behavior including the Mullins effect and necking instability. Despite extensive efforts on modelling different aspects of the damage process in gels, the micro-mechanical modelling of the mechanisms that lead to necking in DN gels remains to be a challenging task. Here, a constitutive model is proposed to understand and describe the mechanical behavior of DN gels based on statistical micro-mechanics of interpenetrating polymer networks. DN gels behavior is divided into three parts including pre-necking, necking, and hardening. The first network is dominant in the response of the gel in the pre-necking stage. The breakage of the first network to smaller network fractions (clusters) induces the stress softening observed in this stage. The interaction of both networks and the second network are also considered as main contributors to the response of gel in necking and hardening stages, respectively. The contribution of clusters decreases during the necking as the second network starts hardening. The numerical results of the proposed model are validated and compared by uni-axial cyclic tensile experimental data of DN gels.

Synthesis and Properties of Hybrid Materials for Ion-Exchange and Complexing Membranes

2013 ◽  
Vol 749 ◽  
pp. 283-288 ◽  
Author(s):  
Yury Pozhidaev ◽  
Oksana Lebedeva ◽  
Evgenya Sipkina ◽  
Alexandra Chesnokova ◽  
Nikolay Ivanov
Keyword(s):  
Hybrid Materials ◽  
Hybrid Composites ◽  
Sol Gel ◽  
Polymer Networks ◽  
Glycidyl Ether ◽  
Three Dimensional ◽  
Polymeric Materials ◽  
Interpenetrating Polymer Networks ◽  
Linear Polymers ◽  
Sol Gel Synthesis

Hybrid materials are attractive for a large range of applications from medicine and biotechnology to telecommunication systems and fuel cells. In the present research we have studied sol-gel synthesis of hybrid composites based on carbofunctional organosilicon monomers N,N-bis-(3-triethoxysilylpropyl) thiocarbamide (I) or 2-{[3-(triethoxysilyl) propyamino} pyridine (II), and copolymers of ethylene glycol vinyl glycidyl ether with vinyl chloride.The polymeric materials were characterized by scanning electron microscope (SEM) and IR-spectroscopy. Gel products possess high thermal stability (decomposition temperatures reach 250 °С) and have developed specific surface (to 20 m2g-1).The synthesized composites comprise semi-interpenetrating polymer networks, consisting of three-dimensional and linear polymers that cannot be separated due to the mechanical interlacing of theirs chains. Hybrid composites have a value of sorption capacity for Pt (IV) ions of 70 (I) and 28 (II) mgg-1. Proton conductivity of membranes based on the synthesized composites is characterized by the values 3.52 10-2(I) and 1.19 10-2(II) Scm-1measured at temperature of 25 °C.

scholarly journals Preparation and Characterization of Semi-IPN Cryogels Based on Polyacrylamide and Poly(N,N-dimethylaminoethyl methacrylate); Functionalization of Carrier with Monochlorotriazinyl-β-cyclodextrin and Release Kinetics of Curcumin

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6975
Author(s):  
Ecaterina Stela Dragan ◽  
Maria Valentina Dinu ◽  
Claudiu Augustin Ghiorghita ◽  
Maria Marinela Lazar ◽  
Florica Doroftei
Keyword(s):  
Release Kinetics ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Order Kinetic ◽  
Dimethylaminoethyl Methacrylate ◽  
Anti Cancer ◽  
Large Application ◽  
Novel Strategy ◽  
Kinetics Of

Curcumin (CCM) is a natural hydrophobic polyphenol known for its numerous applications in the food industry as a colorant or jelly stabilizer, and in the pharmaceutical industry due to its anti-inflammatory, antibacterial, antioxidant, anti-cancer, and anti-Alzheimer properties. However, the large application of CCM is limited by its poor solubility in water and low stability. To enhance the bioavailability of CCM, and to protect it against the external degradation agents, a novel strategy, which consists in the preparation of semi-interpenetrating polymer networks, (s-IPNs) based on poly(N,N-dimethylaminoethyl methacrylate) entrapped in poly(acrylamide) networks, by a cryogelation technique, was developed in this work. All s-IPN cryogels were characterized by SEM, EDX, FTIR, and swelling at equilibrium as a function of pH. Functionalization of semi-IPN cryogel with monochlorotriazinyl-β-cyclodextrin (MCT-β-CD) led to IPN cryogel. The release profile of CCM from the composite cryogels was investigated at 37 °C, in pH 3. It was found that the cumulative release increased with the increase of the carrier hydrophobicity, as a result of increasing the cross-linking degree, the content and the molar mass of PDMAEMA. Fitting Higuchi, Korsmeyer–Peppas, and first order kinetic models on the CCM release profiles indicated the diffusion as the main driving force of drug release from the composite cryogels.

scholarly journals The microscopic distribution of hydrophilic polymers in interpenetrating polymer networks (IPNs) of medical grade silicone

Polymer ◽  
2021 ◽  
Vol 224 ◽  
pp. 123671
Author(s):  
Gregory N. Smith ◽  
Erik Brok ◽  
Martin Schmiele ◽  
Kell Mortensen ◽  
Wim G. Bouwman ◽  
...  
Keyword(s):  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Hydrophilic Polymers ◽  
Microscopic Distribution ◽  
Medical Grade

Tough Underwater Super-tape Composed of Semi-interpenetrating Polymer Networks with a Water-Repelling Liquid Surface

2020 ◽  
Author(s):  
Jiayi Liu ◽  
Shixiang Wang ◽  
Qiaoqiao Shen ◽  
Lingmin Kong ◽  
Guangsu Huang ◽  
...  
Keyword(s):  
Liquid Surface ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks
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