Functional lignocellulosic materials prepared by ATRP from a wood scaffold

Cabane, Etienne; Keplinger, Tobias; Künniger, Tina; Merk, Vivian; Burgert, Ingo

doi:10.1038/srep31287

Cited by 59 publications

(38 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our case, the BiBB molecules are introduced inside wood with pyridine (an excellent wood swelling solvent). BiBB molecules are relatively small and highly reactive: they have been shown to react deep inside the cell wall structure . In order to grow a polymer chain in the next step, both monomers and catalyst complex need to reach the initiating sites.…”

Section: Resultsmentioning

confidence: 63%

“…In most cases, activated carboxylic acids such as anhydrides or acid chlorides are used. It is also possible to attach ATRP initiators, such as BiBB . In previous works, we have shown the effect of different reaction parameters (reaction time, solvent, BiBB concentration, and year ring distribution) on the resulting BiBB WPG.…”

Section: Resultsmentioning

confidence: 99%

“…SI‐ATRP was already applied to the most technologically relevant biopolymers, including cellulose, lignin, and chitosan . It was also performed on more complex materials, such as wood . A variation of SI‐ATRP, surface initiated activators generated by electron transfer ATRP (SI‐AGET‐ATRP) has also been used on bulk wood …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Grafting of amphiphilic block copolymers on lignocellulosic materials via SI‐AGET‐ATRP

Blanco

Gomez

Fleckenstein

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

Self Cite

View full text Add to dashboard Cite

Functionalizing biosourced materials is a major topic in the field of materials science. In particular, grafting polymerization techniques have been employed to change the surface properties of various substrates. Here, we report on the grafting of amphiphilic block copolymers in lignocellulosic materials using surface‐initiated activators generated by electron transfer atomic transfer radical polymerization (SI‐AGET‐ATRP). With this modification, it is possible to combine the interesting properties (anisotropy and high mechanical stability) of lightweight lignocellulosic materials, such as wood, with the special properties of the grafted block copolymers. Hydroxyl groups on wood cell wall biopolymers were used for the chemical bonding of an alkyl bromide as the initiator for AGET‐SI‐ATRP of a highly hydrophilic monomer ([2‐(methacryloyloxy)ethyl]trimethylammonium chloride) and a highly hydrophobic fluorinated monomer (2,2,3,3,4,4,5,5‐octafluoropentyl methacrylate). The successful grafting of homopolymers and block copolymers onto the wood structure was confirmed through Fourier transform infrared and Raman spectroscopy. The functionalization with the two homopolymers yielded lignocellulosic materials with opposite wettabilities, whereas by the adjustment of the ratio between the two copolymer blocks, it was possible to tune the wettability between these two extremes. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 885–897

show abstract

Section: Resultsmentioning

confidence: 63%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Grafting of amphiphilic block copolymers on lignocellulosic materials via SI‐AGET‐ATRP

Blanco

Gomez

Fleckenstein

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

Self Cite

View full text Add to dashboard Cite

show abstract

“…With increasing energy demand and requirements for environmental conservation, replacement of petroleum‐based materials with bio‐based materials is an interesting opportunity. Wood from trees is a key resource in the Northern Hemisphere due to its abundance (global number of trees ≈3 trillion), excellent mechanical properties, and potential for functionalization . The chemical composition with high‐strength cellulose nanofibrils and complex hierarchical structure are important factors contributing to the excellent properties of this native composite .…”

Section: Introductionmentioning

confidence: 99%

Optically Transparent Wood: Recent Progress, Opportunities, and Challenges

Vasileva

Sychugov

et al. 2018

Advanced Optical Materials

162

105

View full text Add to dashboard Cite

Transparent wood is an emerging load‐bearing material reinvented from natural wood scaffolds with added light management functionalities. Such material shows promising properties for buildings and related structural applications, including its renewable and abundant origin, interesting optical properties, outstanding mechanical performance, low density, low thermal conductivity, and great potential for multifunctionalization. In this study, a detailed summary of recent progress on the transparent wood research topic is presented. Remaining questions and challenges related to transparent wood preparation, optical property measurements, and transparent wood modification and applications are discussed.

show abstract

“…The prepared multifunctional macroinitiator is functionalized in the next step by incorporating well‐defined polymeric arms . Moreover, ATRP stands out other advantages including preparation of well‐defined hybrid composites with narrow molecular weight distributions (MWDs) and control over molecular weight (MW) . In the case of complex architecture, ATRP is favorable due to control of polymer topology and site‐specific incorporation of functionalities .…”

Section: Introductionmentioning

confidence: 99%

Preparation of hydrophobic tannins‐inspired polymer materials via low‐ppm ATRP methods

Zaborniak

Chmielarz

Flejszar

et al. 2019

Polymers for Advanced Techs

View full text Add to dashboard Cite

The novel hydrophobic coating material was received for the first time by a two-step synthetic route. Firstly, the 15-functional brominated macroinitiator was prepared by the esterification methodology. Next step covers synthesis of star-like polymers by poly(n-butyl acrylate) (PBA) arms polymerization via three low-ppm atom transfer radical polymerization (ATRP) approaches including application of copper and silver wire in SARA and ARGET ATRP, respectively, as driving forces in redox cycle of catalyst, and an external stimulus in the form of electric current (seATRP) as the third approach in copper(II) regeneration system. As expected, the electrochemically mediated technique allows synthesis of tannic acid-inspired coating polymers in precisely controlled manner during the entire polymerization process, proved by linear firstorder kinetics plot in contrast to above-mentioned methods, low dispersity (Ð = 1.18) of star-shaped polymers, and high efficiency of initiation (ƒ i = 81%) determined after detaching of polymers side arms. Macromolecules received by all low-ppm ATRP solutions were characterized by preserved chain-end functionality (theoretical dead chain fraction; DCF theo <1%). Adhesive and hydrophobic properties of received polymer materials were investigated by contact angles (θ) and free surface energy (FSE) calculations. Prepared polymer films besides excellent hydrophobic properties have great potential as a self-healing solution. K E Y W O R D S hydrophobic surfaces, low-ppm ATRP, tannic acid-based coating materials 1 | INTRODUCTION Recent needs in the field of protective coatings with increased hydrophobicity and functional bioactive surfaces permanently connected with naturally derived substrates gain more attention, and therefore are a driving force in searching for innovative polymeric biomaterials, with emphasis on receiving coating materials, which perfectly cooperate with the tissues of the human body. The effective approach in the synthesis of functional biomaterials surfaces is grafting adhesive substances of natural origin with monomers characterized by appropriate properties (eg, vinyl monomers). 1-5 In this field of biocoatings, investigation of polyphenol chemistry in materials science could be an indication of the appropriate naturally derived substrate with desired adhesive properties.Considering the polymeric coatings, poly(n-butyl acrylate) (PBA) deserves attention. Incorporate itself increases the hydrophobicity of received surfaces; 6 moreover, it is thoroughly investigated in the context of controlled polymerization technique. 7-9 Due to this fact, it is simple to receive precisely controlled polymeric materials; therefore, PBA constitutes a suitable block to incorporate the next functional segment in a polymeric coating material, 8-10 contributing in addition to hydrophobicity also excellent resistance for weather conditions 11,12 and low temperature performance. 13 Recently, PBA was investigated as an excellent soft block, which bears the reversible moieties. This

show abstract

Functional lignocellulosic materials prepared by ATRP from a wood scaffold

Cited by 59 publications

References 53 publications

Grafting of amphiphilic block copolymers on lignocellulosic materials via SI‐AGET‐ATRP

Grafting of amphiphilic block copolymers on lignocellulosic materials via SI‐AGET‐ATRP

Optically Transparent Wood: Recent Progress, Opportunities, and Challenges

Preparation of hydrophobic tannins‐inspired polymer materials via low‐ppm ATRP methods

Contact Info

Product

Resources

About