Polyethylene film surface functionalized with chitosan via γ-ray irradiation in aqueous system: An approach to induce copper(II) ion adsorptivity on PE

Modification of chitosan onto PE by irradiation in salt solutions and possible use as Cu2+ complex film for pest snail control

“…Figure shows FTIR spectra of CS‐ g ‐PE films when the different CS‐salt solutions were used in radiation‐induced grafting system. The FTIR result for the grafted product was identified on the basis of spectrum analysis and comparison with relevant data reported in the literature . It was clarified that CS‐ g ‐PE films obtained from CS‐HOAc [Figure (c)] and CS‐GSH [Figure (e)] show peaks similar to the blank PE film [Figure (a)].…”

“…Therefore, the CS‐HOAc solution was considered to be a simplest condition for radiation‐induced grafting of CS onto PE film. Besides, NHS, an activating agent for carboxylic acid, was found to be able to prepare water‐based CS solution . Generally, NHS could assist esterification reaction between the hydroxyl group of CS and the carboxylic group of the conjugated molecule .…”

“…PE films were cut into 10 × 10 cm strips and surface washed thoroughly with isopropanol at 70°C for 12 h, sonicated for 6 h and dried at 50°C for 3 h. The cleaned PE films were immersed in an access amount of the CS aqueous solutions, i.e., CS‐HOAc, CS‐NHS, CS‐GSH, and CS‐HOBt (10 mL), for 24 h in glass tubes. The samples were irradiated with a γ‐ray the dose of 80 kGy in aerobic condition at room temperature according to the previous research . After irradiation, the samples were left for 48 h before washing thoroughly with acetic acid (1%, v/v), NaOH (1%, v/v) and distilled water for five times, followed by drying at 50°C to obtain chitosan‐ grafted‐ polyethylene (CS‐ g ‐PE) films.…”

“…The cross‐linked chitosan was coated on nonporous silica gel for Cu 2+ coordinating . With covalent grafting, chitosan was grafted onto polyethylene, polylactic acid, poly(acrylonitrile), and poly(hydroxyethyl methacrylate) films by radiation and plasma polymerization techniques. The chitosan coated films proposed as biocompatible and metal adsorbent materials.…”

“…Mao et al, conjugated chitosan with a photoinitiator, i.e., 4‐azidobenzoic acid for modifying polyethylene surface via UV treatment. Based on this viewpoint, modifying chitosan onto PE surface using γ‐rays induced grafting was possible when an appropriate chitosan solution was chosen . With grafting by γ‐irradiation, it is important to note that chitosan has not radiation reactive group, i.e., vinyl monomer.…”