A regenerable polyvinyl alcohol/organic boron fracturing fluid system with 1.6 wt% polyvinyl alcohol (PVOH) and 1.2 wt% organic boron (OBT) was studied, and its main regeneration mechanism is the reversible cross-linking reaction between B(OH)4- and hydroxyl groups of PVOH as the change of pH. Results of rheology evaluations show that both the apparent viscosity and the thermal stability of the...

The goal of this study was to develop pregelatinized starch (P-St) and polyvinyl alcohol (PVOH) fi lms as water-soluble laundry plastic bags avoid having contact with COVID-19 infected clothes by extrusion method. effects content on the properties were examined. PVOH P-St blend compounded twin- screw extruder various 0, 10, 20, 30, 40% weight xed glycerol 20 phr. produced blown lm extrusion. ch...

carboxymethyl cellulose (cmc)-polyvinyl alcohol (pvoh) blend film, containing 0-10% cellulose nanowhiskers (cnw), was produced through casting method, while physical properties of the films being investigated. cmc-pvoh-cnw nanocomposites, were prepared with a diluted suspension of cellulose nanowhiskers. nanowhiskers suspension was prepared through acid hydrolysis of cotton linter by sulfuric a...

Abstract Active food packaging materials produced through electrospinning of polyvinyl alcohol (PVOH) containing essential oils (EOs) from two broadly used spices (Laurus nobilis –LEO- and Rosmarinus officinalis -REO-) were developed applied to chicken breast fillets with the aim prolonging their shelf-life. Citric acid (CA) was successfully incorporated as a natural cross-linker electrospun st...

The formation of spherical micelles in aqueous solutions of poly(N-methyl-2-vinyl pyridinium iodide)-blockpoly(ethylene oxide), P2MVP-b-PEO and poly(acrylic acid)-block-poly (vinyl alcohol), PAA-b-PVOH has been investigated with light scattering-titrations, dynamic and static light scattering, and H 2D Nuclear Overhauser Effect Spectroscopy. Complex coacervate core micelles, also called PIC mic...

Transparent wood (TW), a new type of composite material with good optical transmittance and excellent mechanical properties, has attracted great interest in recent years. In this study, hydrogen peroxide strategy was used on rubber (Hevea brasiliensis Muell. Arg) to eliminate lignin hemicellulose. Subsequently, delignified combined each three impregnants refractive index similar that cellulose ...

In the present study, an attempt has been made to impart antimicrobial finishing on cotton woven fabric using nano silver solution, at various concentrations: 5 gpl, 10 gpl, 15 gpl, 20 gpl, and 25 gpl in the presence of PVOH (5 gpl, 7.5 gpl and 10 gpl) and an eco-friendly cross linking agent, namely 100gpl glyoxal/65 gpl Appretan N 92111 (binder) applied by the pad-dry-cure technique. Curing co...

In this research samples of PVOH were synthesized at various reaction conditions (temperature, time, and amount of catalyst). First at 25˚C and 45˚C and constant catalyst weight samples of PVOH were prepared with different degree of hydrolysis at various times. For investigation of the effects of temperature, at times 20 and 40 min and constant weight of catalyst PVOH was prepared at various te...

ABSTRACT Climacteric fruits have short postharvest shelf life. Coating is an alternative to minimize fruit ripening and post-harvest losses. Maize starch (S) polivinilic alcohol - PVOH (P), isolated or blended, can be used in the formulation of coatings. However, little known about potential PVOH-containing coatings conservation fruits. Papaya were aftercoated with 5 coating formulations: 3% (S...

Modified starch was prepared in this work by acid-thinning and oxidizing corn starch with ammonium persulfate. Also, starch-based aqueous polymer isocyanate (API) wood adhesive was prepared. The effect of the added amount of modified starch, styrene butadiene rubber (SBR), polymeric diphenylmethane diisocyanate (P-MDI), and the mass concentration of polyvinyl alcohol (PVOH) on the bonding stren...