Ammonium persulfate (APS)

Grafting of acrylamide (AAm) onto kappa-carrageenan (KC) was carried out using microwave irradiation in the presence of ammonium persulfate (APS) as initiator. The effect of reaction variables including the concentration of APS, AAm, and KC; time duration; and microwave power was studied. Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM) were carried out to characterize the graft copolymer.

13p langthannam 29-12-2021 8 0   Download

Wool has disulphide bonds containing-hydrophobic external keratin layers, which act as a barrier for the modification through coating with hydrophilic materials. For that reason, in this work, to ensure a dense and homogenous conductive polymer coating onto the wool, the fabrics were subjected to the reduction process in the aqueous alkaline medium containing agents that can attack these disulphide bonds. Then, one of the polyaniline derivatives, poly(mtoluidine) (PMT), was coated onto wool by in situ polymerization of m-toluidine sulphate using ammonium persulfate (APS) as an oxidant.

16p tudichquannguyet 29-11-2021 9 1   Download

The superabsorbent polymers based on acrylic acid have been prepared in the presence of ammonium persulfate (APS) as initiator and N,N-methylene- bis- acrylamide (MBA) as crosslinking agent. The suspension polymerisation occurred in aqueous drops dispersed in toluene and stabilised by sorbitan monooleate. Some effects on the swelling degree and size particles such as concentrations of MBA and initiator, neutralization degree (Dn) were studied. Swelling degree 405g/g, reach maximum at 85◦C and 0.09% crosslinking agent, 1.

6p 12120609 01-06-2020 11 2   Download

Polyaniline (PANI) was synthesized chemically in an acidic medium in the presence of ammonium persulfate (APS) as an oxidizing agent. PANI/montmorillonite nano-composites were prepared in the presence of various amounts of modified clay (from 1 to 5 wt.%) by solution casting method.

8p tocectocec 25-05-2020 7 2   Download

Trong nghiên cứu này, sự hấp thụ Cr (VI) trên vật liệu polyaniline biến đổi (MPM) đã được nghiên cứu. MPM được tổng hợp giữa Aniline và Ammonium Persulfate (APS) dưới dạng chất oxy hóa trong môi trường axit H2SO4 1M / HCl 1M với chiết xuất Rhodomyrtus tomentosa trong nước và dư lượng chiết xuất Rhodomyrtus tomentosa sử dụng làm chất hấp phụ. Cơ chế của các ion hấp thụ Cr (VI) trên MPM đã được so sánh và thảo luận ở đây.

6p khidoichuoi 04-03-2020 27 1   Download