Cationic wood cellulose films with high strength and bacterial anti-adhesive properties

Sirviö, Juho Antti; Anttila, Anna-Kaisa; Pirttilä, Anna Maria; Liimatainen, Henrikki; Kilpeläinen, Ilkka; Niinimäki, Jouko; Hormi, Osmo

doi:10.1007/s10570-014-0351-y

Cited by 36 publications

(35 citation statements)

References 24 publications

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“…In contrast, the spectrum of CDAC (the product of step 2) had a band at 1680 cm –1 attributed to C=N bond vibration and a shoulder band at ∼1642 cm –1 attributed to N–H bond bending. 66 , 67 …”

Section: Results and Discussionmentioning

confidence: 99%

Surface Modification of Cured Inorganic Foams with Cationic Cellulose Nanocrystals and Their Use as Reactive Filter Media for Anionic Dye Removal

Selkälä

Suopajärvi

Sirviö

et al. 2020

ACS Appl. Mater. Interfaces

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In this work, a surface cationized inorganic–organic hybrid foam was produced from porous geopolymer (GP) and cellulose nanocrystals (CNCs). GPs were synthesized from alkali-activated metakaolin using H 2 O 2 as a blowing agent and hexadecyltrimethylammonium bromide (CTAB) as a surfactant. These highly porous GPs were combined at pH 7.5 with cationic CNCs that had been synthesized from dissolving pulp through periodate oxidation followed by cationization in a deep eutectic solvent. The GP-CNC hybrid foams were employed as reactive filters in the removal of the anionic dye, methyl orange (MO; 5–10 mg/L, pH 7). The effects of a mild acid wash and thermal treatments on the structure, properties, and adsorption capacity of the GPs with CNCs and MO were investigated. The CNCs aligned as films and filaments on the surfaces of the neutralized GPs and the addition of CNCs improved MO removal by up to 84% compared with the reference sample. In addition, CTAB was found to disrupt the attachment of CNCs on the pores and improve adsorption of MO in the GPs with and without CNCs.

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Section: Results and Discussionmentioning

confidence: 99%

Surface Modification of Cured Inorganic Foams with Cationic Cellulose Nanocrystals and Their Use as Reactive Filter Media for Anionic Dye Removal

Selkälä

Suopajärvi

Sirviö

et al. 2020

ACS Appl. Mater. Interfaces

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“…In addition, no bacteria were observed to grow on the lm, demonstrating strong bacterial anti-adhesive properties. 84 Previous studies of PVA-composite lms containing cationic CNFs showed no inhibition zone in disk testing, but the bacteria did not grow on top nor under the lm. 36 The lack of an inhibition zone was associated with the immobilization of cationic CNFs (as an antimicrobial agent) in lms, resulting in the death of the bacteria in direct contact with the lm.…”

Section: Mechanical Properties Of the Cationic Wood Nanober Lmsmentioning

confidence: 87%

Transparent lignin-containing wood nanofiber films with UV-blocking, oxygen barrier, and anti-microbial properties

et al. 2020

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“…S3, ESM), suggesting that residual cellulose hydrolysis products did not affect the formation of ZnO nanoparticles on the CNCs. (Sirviö et al 2014;Ul-Islam et al 2014). This suggests that CNC/ZnO nanohybrids were successfully synthesized by the facile one-pot route.…”

Section: Chemical Structure Of Cncs and Cnc/zno Nanohybridsmentioning

confidence: 99%

A facile one-pot route for preparing cellulose nanocrystal/zinc oxide nanohybrids with high antibacterial and photocatalytic activity

et al. 2014

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Cellulose nanocrystal/zinc oxide (CNC/ ZnO) nanohybrids were prepared through citric hydrochloric acid hydrolysis of commercial microcrystalline cellulose (MCC), and simple precipitation with zinc nitrate aqueous solution [Zn(NO 3 ) 2 Á6H 2 O] via one-pot green synthesis, in which preparation and modification of CNCs were performed simultaneously and the obtained CNCs with carboxyl groups could act as a stabilizing and supporting agent to anchor ZnO nanoparticles. The influence of the Zn 2? ion concentration on the morphology, microstructure, and properties of the CNC/ZnO nanohybrids was investigated by using Fourier-transform infrared and ultravioletvisible (UV-Vis) spectroscopy, X-ray diffraction (XRD) analysis, field-emission scanning electron microscopy, and thermogravimetric analysis. According to the UV-Vis and XRD results, well-dispersed ZnO nanoparticles with hexagonal wurtzite structure and smallest average diameter of 42.6 nm were successfully anchored onto the surface of the CNCs. The CNC/ ZnO nanohybrid CNC/ZnO-0.5 showed improved thermal stability, high antibacterial activity, and photocatalytic activity for methylene blue (MB) due to strong interaction between the CNCs and ZnO nanoparticles. Compared to CNCs, the thermal degradation onset temperature (T 0 ) of the nanohybrids was increased by 23.9°C, while antibacterial ratios of 100.0 and 100.0 % against viable Escherichia coli and Staphylococcus aureus were achieved. Moreover, 93 % of MB dye was decomposed after UV light irradiation for 100 min.

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Cationic wood cellulose films with high strength and bacterial anti-adhesive properties

Cited by 36 publications

References 24 publications

Surface Modification of Cured Inorganic Foams with Cationic Cellulose Nanocrystals and Their Use as Reactive Filter Media for Anionic Dye Removal

Surface Modification of Cured Inorganic Foams with Cationic Cellulose Nanocrystals and Their Use as Reactive Filter Media for Anionic Dye Removal

Transparent lignin-containing wood nanofiber films with UV-blocking, oxygen barrier, and anti-microbial properties

A facile one-pot route for preparing cellulose nanocrystal/zinc oxide nanohybrids with high antibacterial and photocatalytic activity

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