Preparation and flocculation behavior of cellulose‐g‐PMOTAC copolymer

Parviainen, Helena; Hiltunen, Miia; Maunu, Sirkka Liisa

doi:10.1002/app.40448

Cited by 14 publications

(12 citation statements)

References 35 publications

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“…Adding charged groups to the polysaccharide backbone is one good example from structural tailoring. Reports on the cationization can be found for several polysaccharides, but most of the work on the cationization of polysaccharides has been conducted on starch and cellulose [1][2][3]. Both starch and cellulose have a high molar mass, which is required for certain applications.…”

Section: Introductionmentioning

confidence: 99%

Field-Flow Fractionation of Cationic Cellulose Derivatives

Pitkänen

Tenkanen

2019

Chromatographia

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The asymmetric flow field-flow fractionation (AF4) method was developed for cationic cellulose derivatives. AF4 is the method of choice especially for high-molar mass samples, which are challenging to characterize with conventional chromatographic techniques such as size-exclusion chromatography (SEC). The cationic charge of macromolecules also complicates the size-based separations where no interaction between the analytes and the column stationary phase (SEC) or membrane (AF4) should occur. However, many column matrices and membranes carry negative charge and thus preventing interactions between cationic analytes and negatively charged separation support should be taken into consideration when doing method development. In this study, two eluent compositions, neutral and acidic, were tested for AF4 separation of cationic hydroxyethyl celluloses with varying charge densities. The eluent composition with a pH below the isoelectric point of regenerated cellulose membrane, which was used in this AF4 study, enabled the size-based separation with close to 100% analysis recovery. Macromolecular parameters (molar mass and radius of gyration) and conformation were investigated by coupling a multi-angle light scattering detector and differential refractometer to the AF4 system.

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Section: Introductionmentioning

confidence: 99%

Field-Flow Fractionation of Cationic Cellulose Derivatives

Pitkänen

Tenkanen

2019

Chromatographia

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“…Graing of poly(DMAEMA) from dissolved cellulose has mostly been studied in the context of stimuli-responsive properties in addition to biomedical and occulant applications. [30][31][32][33][34][35][36] Surfaceinitiated atom-transfer radical polymerization (SI-ATRP) of DMAEMA producing polymer brush-modied cellulose surfaces or particles has recently expanded from cellulose lms to CNCs. 9,[37][38][39][40] Here, homopolymerization on CNCs produced short and polydisperse poly(DMAEMA) gras.…”

Section: Introductionmentioning

confidence: 99%

Cationic polymer brush-modified cellulose nanocrystals for high-affinity virus binding

et al. 2014

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Surfaces capable of high-affinity binding of biomolecules are required in several biotechnological applications, such as purification, transfection, and sensing. Therein, the rod-shaped, colloidal cellulose nanocrystals (CNCs) are appealing due to their large surface area available for functionalization. In order to exploit electrostatic binding, their intrinsically anionic surfaces have to be cationized as biological supramolecules are predominantly anionic. Here we present a facile way to prepare cationic CNCs by surface-initiated atom-transfer radical polymerization of poly(N,N-dimethylaminoethyl methacrylate) and subsequent quaternization of the polymer pendant amino groups. The cationic polymer brush-modified CNCs maintained excellent dispersibility and colloidal stability in water and showed a ζ-potential of +38 mV. Dynamic light scattering and electron microscopy showed that the modified CNCs electrostatically bind cowpea chlorotic mottle virus and norovirus-like particles with high affinity. Addition of only a few weight percent of the modified CNCs in water dispersions sufficed to fully bind the virus capsids to form micrometer-sized assemblies. This enabled the concentration and extraction of the virus particles from solution by low-speed centrifugation. These results show the feasibility of the modified CNCs in virus binding and concentrating, and pave the way for their use as transduction enhancers for viral delivery applications.

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“…Acylation introduces acyl groups into the nitrogen and oxygen etcetera atoms of biopolymers. Parviainen et al (2014) directly acylated the hydroxyl groups of cellulose with 2bromoisobutyryl bromide to obtain a cellulose macromolecular initiator. Then, N,N-dimethyl aminoethyl methacrylate was grafted with the macromolecular initiator to form cellulose-g-poly(N,N-dimethyl aminoethyl methacrylate).…”

Section: Acylationmentioning

confidence: 99%

Biopolymer-based flocculants: a review of recent technologies

Jiang

Li²,

Tang

et al. 2021

Environ Sci Pollut Res

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Biopolymer-based flocculants have become a potential substitute for inorganic coagulants and synthetic organic flocculants due to their wide natural reserves, environmental friendliness, easy natural degradation, and high material safety. In recent years, with more and more attention to clean technologies, a lot of researches on the modification and application of biopolymer-based flocculants have been carried out. The present paper reviews the latest important information about the base materials of biopolymer-based flocculants, including chitosan, starch, cellulose, and lignin etc. This review also highlights the various modification methods of these base materials according to reaction types in detail. Via the recent researches, the flocculation mechanisms of biopolymer-based flocculants, such as adsorption, bridging, charge neutralization, net trapping, and sweeping, as well as, some other special mechanisms are comprehensively summarized. This paper also focuses on the water treatment conditions, the removal efficiency, and advantages of biopolymer-based flocculants in applications. Further, this review sheds light on the future perspectives of biopolymer-based flocculants, which may make progress in the sources of base materials, modification processes, multi-function, and deepening application researches. We believe that this review can guide the further researches and developments of biopolymer-based flocculants in the future, to develop them with a higher efficiency, a lower cost, more safety, and multi-function for more diversified applications.

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Preparation and flocculation behavior of cellulose‐g‐PMOTAC copolymer

Cited by 14 publications

References 35 publications

Field-Flow Fractionation of Cationic Cellulose Derivatives

Field-Flow Fractionation of Cationic Cellulose Derivatives

Cationic polymer brush-modified cellulose nanocrystals for high-affinity virus binding

Biopolymer-based flocculants: a review of recent technologies

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