Filling of Epoxy Polymers with Chemically Precipitated Chalk from Chemical Water Treatment Sludge

Galeev, Ruslan; Nizamov, Rashit; Абдрахманова, Л А

doi:10.1007/978-3-030-68984-1_14

Cited by 9 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the change in the color of lignocellulosic flour was observed, which could indicate the loss of hydroxyl groups and the reduced content of cellulose-derived carbonyl bonds (Figure 2). Moreover, such a phenomenon was also noticed during the process of the degradation of lignin, caused by the neutralization of wood flour [42]. Additionally, significant swelling of filler was observed.…”

Section: Chemical Modification Of Waste Fillermentioning

confidence: 82%

Modification of Epoxy Compositions by the Application of Various Fillers of Natural Origin

Sienkiewicz

Czub

2023

Materials

View full text Add to dashboard Cite

A series of composites based on epoxy resin filled with additives of natural origin were prepared to investigate the influence of such fillers on the properties of the epoxy compositions. For this purpose, the composites containing 5 and 10 wt.% of additive of natural origin were obtained using the dispersion of oak wood waste and peanut shells in bisphenol A epoxy resin cured with isophorone-diamine. The oak waste filler had been obtained during the assembly of the raw wooden floor. The performed studies include testing of samples prepared using unmodified and chemically modified additives. Chemical modification via mercerization and silanization was performed to increase the poor compatibility between the highly hydrophilic fillers of natural origin and the hydrophobic polymer matrix. Additionally, the introduction of NH2 groups to the structure of modified filler via 3-aminopropyltriethoxysilane, potentially takes a part in co-crosslinking with the epoxy resin. Fourier Transformed Infrared Spectroscopy (FT–IR), as well as Scanning Electron Microscopy (SEM), were carried out, to study the influence of performed chemical modification on the chemical structure and morphology of wood and peanut shell flour. SEM analyses showed significant changes in the morphology of compositions with chemically modified fillers, indicating improved adhesion of the resin to lignocellulosic waste particles. Moreover, a series of mechanical (hardness, tensile strength, flexural strength, compressive strength, and impact strength) tests were carried out, to assess the influence of the application of fillers of natural origin on the properties of epoxy compositions. All composites with lignocellulosic filler were characterized by higher compressive strength (64.2 MPa—5%U-OF, 66.4%—SilOF, 63.2—5%U-PSF, and 63.8—5%SilPSF, respectively), compared to the values recorded for the reference epoxy composition without lignocellulosic filler (59.0 MPa—REF). The highest compressive strength, among all tested samples, was recorded for the composite filled with 10 wt.% of unmodified oak flour (69.1 MPa—10%U-OF). Additionally, higher values of flexural and impact strength, concerning pure BPA-based epoxy resin, were recorded for the composites with oak filler (respectively, flexural strength: 73.8 MPa—5%U-OF and 71.5 MPa—REF; impact strength: 15.82 kJ/m2—5%U-OF, 9.15 kJ/m2—REF). Epoxy composites with such mechanical properties might be considered as broadly understood construction materials. Moreover, samples containing wood flour as a filler exhibit better mechanical properties compared to those with peanut shell flour (tensile strength for samples containing post-mercerization filler: 48.04 MPa and 40.54 MPa; while post-silanization 53.53 MPa and 42.74 MPa for compositions containing 5 wt.% of wood and peanut shell flour, respectively). At the same time, it was found that increasing the weight share of flour of natural origin in both cases resulted in the deterioration of mechanical properties.

show abstract

Section: Chemical Modification Of Waste Fillermentioning

confidence: 82%

Modification of Epoxy Compositions by the Application of Various Fillers of Natural Origin

Sienkiewicz

Czub

2023

Materials

View full text Add to dashboard Cite

show abstract

“…Generally, among the fillers intended for the strengthening of epoxy resins, one can distinguish between inorganic, organic, synthetic, and natural fillers. The most popular inorganic fillers include chalk [ 27 , 28 ], kaolin [ 29 ], silica [ 30 , 31 ], mica [ 32 , 33 ], quartz, various types of metal oxides, and metallic powders [ 34 ]. These fillers are most often in powder form; the main advantages of their application in polymeric composites are a reduction in the cost of the finished product, improvements in thermal stability, and reductions in processing shrinkage [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

A Method of Managing Waste Oak Flour as a Biocomponent for Obtaining Composites Based on Modified Soybean Oil

Sienkiewicz

Czub

2022

Materials

View full text Add to dashboard Cite

The aim of the present research was the development of a management method for wood-processing waste that was obtained during the production of parquet flooring. Currently mostly useless, such waste mainly ends up in landfills. The oak waste flour was used as a reinforcement material for epoxy biocomposites based on the polyaddition product of epoxidized soybean oil and bisphenol-A (ESBO_BPA). The biofiller was subjected to mercerization, acetylation, and diisocyanate modification to increase the typically poor compatibility between the highly hydrophilic wood fibers and the hydrophobic polymer matrix. Among the analyzed epoxy biocomposites, which contained about 60% raw materials of natural origin, it was found that the best mechanical properties were recorded for cured samples of the ESBO_BPA composition filled with 5 wt % of oak flour mercerized using a 5% solution of NaOH. It was also proven that a higher concentration of alkali deteriorated the mechanical-strengthening properties of the wood filler. The acetylation of the biofiller independently in the best elimination of hydroxyl groups from its structure also removed irregular strips and smoothed its surface. This resulted in a poorer wettability of the oak flour surface by the polymer and consequently an easier pullout of the filler from the polymer matrix and worse mechanical properties of the wood/epoxy composite. To the best of the authors’ knowledge, the present research was the first to examine the possibility of the application of parquet flooring post-production wood flour in biomaterials based on a polyaddition product of epoxidized soybean oil and bisphenol-A.

show abstract

Improvements of Techniques for Determining Hazardous Area Near Facilities Under Construction

Shaehov

Koklugina

Ibragimov

et al. 2021

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Filling of Epoxy Polymers with Chemically Precipitated Chalk from Chemical Water Treatment Sludge

Cited by 9 publications

References 2 publications

Modification of Epoxy Compositions by the Application of Various Fillers of Natural Origin

Modification of Epoxy Compositions by the Application of Various Fillers of Natural Origin

A Method of Managing Waste Oak Flour as a Biocomponent for Obtaining Composites Based on Modified Soybean Oil

Improvements of Techniques for Determining Hazardous Area Near Facilities Under Construction

Contact Info

Product

Resources

About