Abstract A series of waterborne polyurethane (WBPU)/multiwalled carbon nanotube (CNT) and WBPU/nitric acid treated multiwalled (A‐CNT) composites were prepared by in situ polymerization an aqueous medium. The optimum nitric treatment time was about 0.5 h. effects the CNT A‐CNT contents on dynamic mechanical thermal properties, hardness, electrical conductivity, antistatic properties two kinds compared. tensile strength modulus, glass‐transition temperatures soft hard segments ( T gs gh ,...

Abstract Nitric acid treated multiwalled carbon nanotubes (A‐CNTs) were dispersed in a waterborne polyurethane (WBPU) matrix to obtain WBPU/A‐CNT nanocomposite films (99.99/0.01–98.5/1.5) with enhanced thermal, mechanical, and electrical properties. By X‐ray photoelectron spectroscopy (XPS), the oxygen content of nanotube (CNT) surface was found increase increasing treatment time. With time, contact angle CNT significantly decreased from 15 0°. The mean particle sizes raw A‐CNT aqueous...

Abstract A series of waterborne polyurethanes (WBPU) containing different amount 2,2‐bis(hydroxymethyl) propionic acid (DMPA) were synthesized using prepolymer mixing process. Relationships between the DMPA content and physical, mechanical, thermal properties as well adhesive behavior at condition investigated. Stable aqueous dispersions WBPU obtained when was more than 10 mol %. At higher content, particle size dispersion lower but viscosity higher. Water swelling tensile strength films...

Abstract To accomplish ideal wound healing dressing, a series of waterborne polyurethane (WBPU) hydrogels based on polyethylene glycol (PEG) were synthesized by polyaddition reaction in an emulsion system. The stable WBPU which have remaining weight above 85% obtained. effect the soft segment content water absorbability was investigated. Water absorption % and equilibrium (%) hydrogel significantly increased proportion to PEG time water‐immersion. maximum containing various contents range...

To investigate the antibacterial functionality of natural colorant extracts, five kinds dying aqueous solutions were obtained by extraction from peony, pomegranate, clove, Coptis chinensis and gallnut using water at 90 °C for min with a liquor ratio (solid material/water, weight ratio) 1:10. The colorimetric assay activity cotton, silk, wool fabrics dyed these extracts examined. It was found that properties significantly dependent on structure kind fabrics. hues (H) all colorants in range...

A series of waterborne polyurethane (WBPU) adhesives were prepared with various ratios polyol, poly(tetramethylene oxide glycol) (PTMG), and chain extender, ethylene diamine (EDA), at a fixed content diisocyanate, 4,4-dicyclohexylmethane diisocyanate (H12MDI) hydrophilic agent, 2,2-dimethylol propionic acid (DMPA). WBPU characterized by IR 1H-NMR spectroscopies, X-ray diffraction (XRD) gel permeation chromatography (GPC). It was found that the extent hydrogen bonds between hard–hard segment...

To examine the deodorizing function and antibacterial activity of fabrics dyed with gallnut extract, a natural dying aqueous solution was prepared by extraction from using water at 90℃ for 90 min fixed liquor ratio 1:10. The colorimetric properties, deodorization performance ability (cotton, silk wool fabrics) colorant extract were evaluated. main component (yellowish color) in found to be gallotannin. K/ S value increased order cotton < <wool. From curve fitting ultraviolet-visible...

Thermoplastic polyurethane elastomers were prepared from 4,4-diphenylmethane diisocyanate (MDI)/1,4-butanediol (BD)/poly(propylene glycol) (PPG) and MDI/BD/poly(oxytetramethylene (PTMG). The MDI/BD-based hard-segment content of in this study was 39–65 wt %. These had a constant soft-segment molecular weight (Mn, 2000), but variable block length (n, 3.0–10.1; Mn, 1020–3434). effects the on thermal properties elastic behavior investigated. PPG-based MPP samples PTMG-based MPT compared....

Waterborne polyurethane (WBPU) adhesives were prepared by the pre-polymer process using different polyester polyols (M n = 2000), namely poly(tetramethylene adipate glycol) (PTAd) and poly(caprolactone (PCL), polyether oxide (PTMG) poly(propylene (PPG), as soft segments. This study focused on effect of various segments physical, mechanical thermal properties, well adhesive strength WBPUs. All WBPU dispersions showed small particle size high viscosity. PTAd-based shows higher stability,...

Abstract For ideal wound‐healing dressings, a series of waterborne polyurethane (WBPU)/poly( N ‐vinylpyrrolidone) (PVP) composite films (transparent film dressings) were prepared by in situ polymerization an aqueous medium. Stable WBPU/PVP composites, which had high remaining weight greater than 98.4%, obtained. The maximum content PVP for stable dispersions was found to be about 15 wt %. water absorption (%) and equilibrium the remarkably increased proportion time immersion. range 21–158...

Abstract This study used four kinds of natural colorant solutions extracted from Amur Corktree, Dryopteris crassirhizoma, Chrysanthemum boreale, Artemisia using water at 90°C for 90 min with a liquor ratio (solid material/solvent water, weight ratio) 1/10. The dyeing, color fastness, deodorizing properties cotton, silk, wool fabrics dyed extracts were compared. These found to be significantly dependent on the extract concentration, structure, fabric type. Color fastness (light, perspiration...

Abstract Waterborne polyurethane (WBPU) dispersions were prepared by pre‐polymer process using siloxane polyol, namely polydimethylsiloxane (PDMS), and polyester poly(tetramethyleneadipate glycol) (PTAd), as a soft segment. Three different molecular weights ( M n = 550, 6000, 110,000) of PDMS one fixed weight PTAd 2000) was used during preparation WBPU dispersions. This research aims to explore the potential use in complementing boosting flexibility, water resistance, adhesive strength. The...

Abstract As part of an ongoing search for highly hydrophilic waterborne polyurethanes waterproof breathable fabrics, a polyurethane [waterborne polyurethane‐ureas (WBPU): P70, the number indicates poly(ethylene glycol) (PEG) content] dispersion was synthesized from PEG (70 wt %) and dimethylol propionic acid (14 mol as hydrophilic/ionic components, 4,4′‐diisocyanato dicyclohexylmethane diisocyanate, ethylenediamine chain extender, aliphatic tri‐isocyanate hardener. To determine best WBPU...

ABSTRACT A series of UV‐curable polyurethane acrylates (PUA0, FPUA3, FPUA6, FPUA 9 FPUA12, FPUA15, where the numbers indicate wt % perfluoroalkyl acrylate), were prepared from a reactive oligomer [4,4 ́‐dicyclohexymethanediisocyanate(H12MDI)/ poly(tetramethylene glycol)(PTMG)/2‐hydroxyethyl methacrylate (HEMA): 2/1/2 molar ratio, prepolymer:40 %] and diluents [methyl (MMA, 20 %)/ isobornyl acrylate (IBOA, 40–25 %)/heptadecafluorodecyl (PFA, 0–15 wt), total diluents: 60 %]. This study...

Abstract Two series of waterborne polyurethane–urea anionomers were prepared by a polyaddition reaction with isophorone diisocyanate, poly(tetramethylene oxide) glycol (weight‐average molecular weight = 1000), dimethylol propionic acid (DMPA), and ethylene diamine as chain extenders. Triethylamine (TEA) or 28:1 mol/mol ammonium hydroxide (NH 4 OH)/cupric [Cu(OH) 2 ] was used neutralization agent [NH(C H 5 ) NH /Cu 2+ counterion] for the pendant COOH group DMPA. The effects degree counterion...

Abstract To improve the water vapor permeability of coating materials, aqueous sodium alginate (SA) solution was blended with waterborne polyurethane‐urea (WBPU) dispersions synthesized by prepolymer mixing process. The content SA for stable WBPU/SA found to be below 30 wt %. As increased, number and density total micropores (tunnel‐like micropores/isolated micropores) formed after dissolution in coated Nylon fabric also increased remarkably. These results clearly demonstrate that utilizing...

Abstract To obtain flexible waterborne poly(urethane urea) (WBPU) coatings with functionalities such as shape recovery and water resistance, we synthesized a series of WBPUs by prepolymer mixing process from hexamethylene diisocyanate, polyol, 2,2‐bis(hydroxymethyl) propionic acid, ethylenediamine, triethylamine polyol blends [hydroxyl‐terminated polydimethylsiloxane (PDMS) number‐average molecular weight ≈ 550 poly(tetramethylene oxide) glycol (PTMG) 650] different molar ratios. The effects...

Abstract To obtain ideal liquid bandage polymer materials, a series of polyurethane‐urea dispersions were synthesized from 4,4′‐diisocyanato dicyclohexylmethane (H 12 MDI) and ethylene diamine with different molar ratio polyol blend [polyethylene glycol (PEG, M n = 2000 g/mol)/hydroxy terminated poly(dimethylsiloxane) (PDMS, ∼ 550 g/mol)] acetone/ethanol as solvent. The effect PDMS content in PEG/PDMS on the viscosity, mechanical properties, water contact angle/surface energy, insolubility...

More research and development on novel oil sorbent materials is needed to protect the environmental pollution. New nonwoven fabrics (pads) of polypropylene (PP)/kapok blends (blend ratio: 100/0, 75/25, 50/50, 25/75 10/90) were prepared by needle punching process at a fixed (optimized) condition (punch density: 50 punches/cm2 depth: 4 mm). This study focused effect blend ratio PP/kapok sorption capacities find best having highest synergy effect. The (50/50) sample has lowest bulk density...