Preparation, characterization, and surface energetics of hydroxypropyl cellulose/polyethylenimine blends

Abstract

Blend films composed of hydroxypropyl cellulose (HPC) and polyethyleneimine (PEI) were prepared by solution casting method. The structure and mechanical properties of the blend films were analyzed by attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and tensile strength tests. The ATR-FTIR results indicated that there is a 5 cm À1 band shift to higher wave number due to the formation of hydrogen bonding between HPC and PEI components. The mechanical properties of the blends, such as breaking stress, elongation at break, and Young modulus were greatly affected with increase of PEI component. The contact angles of water, ethylene glycol, formamide, and diiodomethane drops were measured on the blend films. The contact-angle results were evaluated in terms of surface free energy components using van Oss-Good methodology. It was shown that the surface free energy components of HPC and its blends did not differ so much with the composition. However, the apolar Lifshitz-van der Waals component (c

Biocidal activity of cellulose materials for medical implants

“…Circular films, 10 mm in diameter and 100 mm thick, were introduced in the disks. The plates were incubated at 37 C for 24 h. Diameter of the inhibition zone depends both on the polymer present in the disk and on microorganism susceptibility.…”

Preparation and Characterization of Lactobacilli‐Loaded Composite Films with Sustaining Antipathogenic Activity and Preservation Effect

“…Because the use of a single biopolymer has several shortcomings, combining two or more biopolymers to complement each other has emerged as a recent strategy. A few studies have demonstrated that films composed of composite biopolymers possess superior overall performance when compared to the films made of pure biopolymers (El‐Wakil, Kassem, & Hassan, ; Leuangsukrerk, Phupoksakul, Tananuwong, Borompichaichartkul, & Janjarasskul, ; Şengül, Demirci, & Caykara, ). For instance, the increase of polyethyleneimine (PEI) in the HPC–PEI films increase the elasticity and elongation at break (Şengül et al., ).…”

“…A few studies have demonstrated that films composed of composite biopolymers possess superior overall performance when compared to the films made of pure biopolymers (El‐Wakil, Kassem, & Hassan, ; Leuangsukrerk, Phupoksakul, Tananuwong, Borompichaichartkul, & Janjarasskul, ; Şengül, Demirci, & Caykara, ). For instance, the increase of polyethyleneimine (PEI) in the HPC–PEI films increase the elasticity and elongation at break (Şengül et al., ). The KGM‐Whey protein isolate (WPI) blend films show preferable flexibility and transparency than KGM‐based films, and better tensile strength (TS) and elastic modulus than WPI‐based films (Leuangsukrerk et al., ).…”