Properties of Polysiylate Binders for Sol-Silicate Pains

2018 ◽  
Vol 1147 ◽  
pp. 1-4 ◽  
Author(s):  
Valentina Ivanovna Loganina ◽  
Svetlana Nikolaevna Kislitsyna ◽  
Yerkebulan Bisengalievich Mazhitov
Keyword(s):  
Tensile Strength ◽  
Liquid Glass ◽  
High Performance ◽  
Silica Sol ◽  
High Polymer ◽  
Performance Property ◽  
Oxygen Anions ◽  
Kinetics Of ◽  
Silicon Oxygen

Information is provided on the composition of polysilicate solutions obtained by mixing liquid glass and silica sol. It was found that the introduction of the sol leads to an increase in the silicate module and contributes to an increase in the fraction of high-polymer fractions of the silicon-oxygen anions. The results of the kinetics of the variation of α-SiO2 and β-SiO2. It is shown, that coatings based on the polysilicate solutions are characterized by faster curing. The was found correlation between the content of high-polymer fractions of silicic anions in a polysilicate solution and the tensile strength of films. Increase in the g-SiO2 content promote increase in the tensile strength of films. The composition of sol silicate paint is developed. Coatings based on paint have a high performance property.

scholarly journals Research of inter-phase interaction in ZOL-silicate paints

2018 ◽  
Vol 7 (4.5) ◽  
pp. 605 ◽  
Author(s):  
Loganina V.I ◽  
Mazhitov E.B
Keyword(s):  
Contact Angle ◽  
Tensile Strength ◽  
Silicic Acid ◽  
Liquid Glass ◽  
Phase Interaction ◽  
High Polymer ◽  
Properties Of Coatings ◽  
Interphase Interaction ◽  
Film Forming ◽  
Silicate Paints

It was suggested to use polysilicate solutions obtained by mixing liquid glass and silicic acid sol as a binder in the manufacture of sili- cate paints. Information is provided on the mechanism for increasing the operational properties of coatings based on sol silicate paint. It has been revealed that polysilicate solutions form membranes characterized by higher tensile strength due to an increase in the fraction of high-polymer fractions of silicic anions in the structure of the polysilicate binder in comparison with liquid glass. The results of a study on the interphase interaction between the pigment and the film-forming agent are given. It is shown that potassium polysilicate solutions form a smaller contact angle on the surface of the pigment (filler) and are characterized by greater work of wetting and adhesion to the filler (pigment).  

scholarly journals THE RESEARCH OF INTER-PHASE INTERACTION IN SOL-SILICATE PAINTS

2018 ◽  
Vol 3 (3) ◽  
pp. 13-17
Author(s):  
В.И. Логанина ◽  
Valentina Loganina ◽  
Еркебулан Мажитов ◽  
Erkebulan Mazhitov
Keyword(s):  
Contact Angle ◽  
Tensile Strength ◽  
Liquid Glass ◽  
Phase Interaction ◽  
High Polymer ◽  
Properties Of Coatings ◽  
Interphase Interaction ◽  
Film Forming ◽  
Manufacturing Information ◽  
Silicate Paints

It is proposed to use polysilicate solutions obtained by mixing liquid glass and silicic acid sol as a binder at silicate paints manufacturing. Information is provided on the mechanism for increasing the operational properties of coatings based on silicate paint sol. It has been revealed that the polysilicate solutions form films characterized by higher tensile strength due to the increase of the share of silicic anions’ high-polymer fractions in the structure of polysilicate binder in comparison with liquid glass. The results of studying the interphase interaction between the pigment and the film-forming agent are presented. It is shown that potassium polysilicate solutions form a smaller contact angle on the surface of the pigment (filler) and are characterized with greater work of wetting and adhesion to the filler (pigment).

Structure and Properties of the Modified Binding for Silicate Paints

2018 ◽  
Vol 931 ◽  
pp. 469-474 ◽  
Author(s):  
Valentina Ivanovna Loganina ◽  
Svetlana Nikolaevna Kislitsyna ◽  
Yerkebulan Bisengalievich Mazhitov
Keyword(s):  
Liquid Glass ◽  
Silica Content ◽  
Silica Sol ◽  
Alkali Concentration ◽  
Monomeric Form ◽  
High Polymer ◽  
Structure And Properties ◽  
The Stability ◽  
Maximum Content ◽  
Silicate Paints

Information is provided about the stability of polysilicates solutions, obtained by mixing liquid glass and silica sol. It was found, that at increases the amount of silicic acid sol added, the pH of the solutions decreases with an unchanged alkali concentration. Information on the structure of polysilicate solutions are given. It has been found, that addition of the sol (increasing the silicate module) contribute to prolonging fraction of high-polymer fractions of silicic anion. The dependence of the silica content of the monomeric form of α-SiO2in the early stages of interaction between the sol and liquid glass is extreme. The maximum content of α-SiO2 depends on the type of liquid glass and the amount of sol. It is shown, that films based on polysilicates solutions, are characterized by faster curing. The manifestation of the scale factor for coatings based on polysilicate solutions was revealed.

Morphology of High-Performance Rigid-Rod Polymer Fibers and Molecular Composites

1989 ◽  
Vol 47 ◽  
pp. 338-339
Author(s):  
W.W. Adams ◽  
S. J. Krause
Keyword(s):  
Tensile Strength ◽  
High Performance ◽  
Liquid Crystalline ◽  
Molecular Level ◽  
Synergistic Effects ◽  
Tensile Modulus ◽  
Commercial Development ◽  
The Matrix ◽  
Molecular Composites ◽  
Rigid Rod

Rigid-rod polymers such as PBO, poly(paraphenylene benzobisoxazole), Figure 1a, are now in commercial development for use as high-performance fibers and for reinforcement at the molecular level in molecular composites. Spinning of liquid crystalline polyphosphoric acid solutions of PBO, followed by washing, drying, and tension heat treatment produces fibers which have the following properties: density of 1.59 g/cm3; tensile strength of 820 kpsi; tensile modulus of 52 Mpsi; compressive strength of 50 kpsi; they are electrically insulating; they do not absorb moisture; and they are insensitive to radiation, including ultraviolet. Since the chain modulus of PBO is estimated to be 730 GPa, the high stiffness also affords the opportunity to reinforce a flexible coil polymer at the molecular level, in analogy to a chopped fiber reinforced composite. The objectives of the molecular composite concept are to eliminate the thermal expansion coefficient mismatch between the fiber and the matrix, as occurs in conventional composites, to eliminate the interface between the fiber and the matrix, and, hopefully, to obtain synergistic effects from the exceptional stiffness of the rigid-rod molecule. These expectations have been confirmed in the case of blending rigid-rod PBZT, poly(paraphenylene benzobisthiazole), Figure 1b, with stiff-chain ABPBI, poly 2,5(6) benzimidazole, Fig. 1c A film with 30% PBZT/70% ABPBI had tensile strength 190 kpsi and tensile modulus of 13 Mpsi when solution spun from a 3% methane sulfonic acid solution into a film. The modulus, as predicted by rule of mixtures, for a film with this composition and with planar isotropic orientation, should be 16 Mpsi. The experimental value is 80% of the theoretical value indicating that the concept of a molecular composite is valid.

EFFECT OF ZINC DITHIOCARBAMATES AND THIAZOLE-BASED ACCELERATORS ON THE VULCANIZATION OF NATURAL RUBBER

2012 ◽  
Vol 85 (1) ◽  
pp. 120-131 ◽  
Author(s):  
Md. Najib Alam ◽  
Swapan Kumar Mandal ◽  
Subhas Chandra Debnath
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Reaction Mechanism ◽  
Natural Rubber ◽  
High Performance ◽  
Binary Systems ◽  
Synergistic Activity ◽  
Tetramethylthiuram Disulfide

Abstract Several zinc dithiocarbamates (ZDCs) as accelerator derived from safe amine has been exclusively studied in the presence of thiazole-based accelerators to introduce safe dithiocarbamate in the vulcanization of natural rubber. Comparison has been made between conventional unsafe zinc dimethyldithiocarbamate (ZDMC) with safe novel ZDC combined with thizole-based accelerators in the light of mechanical properties. The study reveals that thiuram disulfide and 2-mercaptobenzothiazole (MBT) are always formed from the reaction either between ZDC and dibenzothiazyledisulfide (MBTS) or between ZDC and N-cyclohexyl-2-benzothiazole sulfenamide (CBS). It has been conclusively proved that MBT generated from MBTS or CBS reacts with ZDC and produces tetramethylthiuram disulfide. The observed synergistic activity has been discussed based on the cure and physical data and explained through the results based on high-performance liquid chromatography and a reaction mechanism. Synergistic activity is observed in all binary systems studied. The highest tensile strength is observed in the zinc (N-benzyl piperazino) dithiocarbamate-accelerated system at 3:6 mM ratios. In respect of tensile strength and modulus value, unsafe ZDMC can be successfully replaced by safe ZDCs in combination with thiazole group containing accelerator.

scholarly journals A simple approach to prepare fluorescent molecularly imprinted nanoparticles

RSC Advances ◽  
2021 ◽  
Vol 11 (13) ◽  
pp. 7732-7737
Author(s):  
Fenying Wang ◽  
Dan Wang ◽  
Tingting Wang ◽  
Yu Jin ◽  
Baoping Ling ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Sol Gel ◽  
Silica Sol ◽  
Simple Approach ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Low Toxicity ◽  
Good Biocompatibility ◽  
Molecularly Imprinted Nanoparticles

Fluorescent molecularly imprinted polymer (FMIP) gains great attention in many fields due to their low cost, good biocompatibility and low toxicity. Here, a high-performance FMIP was prepared based on the autocatalytic silica sol–gel reaction.

scholarly journals Porous Carbon Architecture Assembled by Cross-Linked Carbon Leaves with Implanted Atomic Cobalt for High-Performance Li–S Batteries

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Ruirui Wang ◽  
Renbing Wu ◽  
Chaofan Ding ◽  
Ziliang Chen ◽  
Hongbin Xu ◽  
...  
Keyword(s):  
Active Sites ◽  
High Performance ◽  
Specific Capacity ◽  
Three Dimension ◽  
Zeolitic Imidazolate Framework ◽  
Shuttle Effect ◽  
Promising Solution ◽  
Fading Rate ◽  
Kinetics Of ◽  
Sulfur Cathodes

AbstractThe practical application of lithium–sulfur batteries is severely hampered by the poor conductivity, polysulfide shuttle effect and sluggish reaction kinetics of sulfur cathodes. Herein, a hierarchically porous three-dimension (3D) carbon architecture assembled by cross-linked carbon leaves with implanted atomic Co–N4 has been delicately developed as an advanced sulfur host through a SiO2-mediated zeolitic imidazolate framework-L (ZIF-L) strategy. The unique 3D architectures not only provide a highly conductive network for fast electron transfer and buffer the volume change upon lithiation–delithiation process but also endow rich interface with full exposure of Co–N4 active sites to boost the lithium polysulfides adsorption and conversion. Owing to the accelerated kinetics and suppressed shuttle effect, the as-prepared sulfur cathode exhibits a superior electrochemical performance with a high reversible specific capacity of 695 mAh g−1 at 5 C and a low capacity fading rate of 0.053% per cycle over 500 cycles at 1 C. This work may provide a promising solution for the design of an advanced sulfur-based cathode toward high-performance Li–S batteries.

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