Amidohydroxylated polyester with biophotoactivity along with retarding alkali hydrolysis throughin situsynthesis of Cu/Cu2O nanoparticles using diethanolamine

What is it about?

in this paper we introduce copper/copper oxide nanoparticles on amide and hydroxyl functionalized polyester using in situ wet chemical reduction method. this functionalized polyester shows multifunctional properties including antibacterial activity, photocatalytic activity, retarding alkali hydrolysis and an enhancement in hydrophilic and mechanical properties.Weight gain, color change and wettability of the treated samples with different concentrations of SHP, PVP and DEA were studied and optimized conditions obtained by using central composite design. The reduced optimum polyester fabric showed very good antibacterial activity of 100 and 99.8 % against Staphylococcus aureus and Escherichia coli with no color change by decreasing the amount of the used materials for the optimum treated sample (0.66 % v/v CuSO4, 0.26 % w/w SHP, 0.10 % w/w PVP and 0.02 % v/v DEA). Also, the optimum treated fabric indicated very good photocatalytic activity (94 %) for degradation of methylene blue solution under sunlight irradiation and higher tensile strength with small increase in bending length. In addition, retarding of polyester hydrolysis in alkali confirmed due to the formation of nanocross-linking within polymeric chains of polyester through in-situ synthesis of Cu/Cu2O NPs, amidoester cross-linking with DEA, introducing amide groups on the polyester surface and lowering the availability of ester bonds for nucleophilic attack.

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Why is it important?

1- Aminolysis of polyester by aminoalcohol to produce surface functionality with polyester chains cross-linking through formation of amido-ester structure and producing amide and hydroxyl groups on the fabric surface. 2- In-situ synthesis of Cu/Cu2O on the polyester fabric along with polyester surface modification to adsorb and stabilize synthesized nanoparticles on the polyester fabric. 3- Higher tensile strength and alkali retardant properties due to nano-cross-linking, lower availability of ester groups for nucleophilic attack and amidoester cross-linking between polymeric chains. 4- Utilizing a polyester fabric with excellent antibacterial properties without changing the white color. 5- Utilizing a polyester fabric with very good photocatalytic activity toward methylene blue solution under sunlight irradiation. 6- Optimizing the conditions through using a statistical approach 7- Finally the new polyester fabric has antibacterial properties, hydrophilicity, alkali retardant, photocatalytic activity toward methylene blue solution with higher tensile strength.