Facile design of renewable lignin copolymers by photoinitiated RAFT polymerization as Pickering emulsion stabilizers

Liu, Jingyi; Shi, Xiaoyu; Lin, MingDe; Zhang, Daihui; Lai, Chenhuan; Wang, Chunpeng; Li, Mi; Ragauskas, Arthur J.; Chu, Fuxiang; Xu, Yuzhi

doi:10.1039/d3gc01500a

Cited by 11 publications

(8 citation statements)

References 70 publications

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“…Meanwhile, RAFT polymerization is characterized by mild reaction conditions, the absence of metal catalysts, and versatility in the choice of monomers. , Li et al fabricated a light-responsive bifunctional fluorinated polyacrylate through RAFT-aided Pickering emulsion polymerization with self-healing ability. Liu et al synthesized the lignin graft copolymers DL-P(MMA-AA) and DL-P(MMA-AM) using a photoinitiated RAFT method, which could self-assemble into spherical nanoparticles and form stable Pickering emulsions in aqueous environment. Cyclodextrins (CDs) were known as “green” molecular hosts and had received widespread attention due to their low cost, easy accessibility, and biocompatibility .…”

Section: Introductionmentioning

confidence: 99%

Multiresponsive Behavior of the Pickering Emulsifier and Its Application for Collecting Small Oil Droplets in Water

Li,

Zhang

et al. 2024

Langmuir

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Responsive Pickering emulsions, with unique nanoparticle interfaces and sensitivity to external stimuli, significantly enhanced the stability and applicability of Pickering emulsions. Multifunctional composite material poly((2-(dimethylaminoethyl methacrylate)-b-(acrylate cyclodextrin))/Fe 3 O 4 nanoparticles, namely P(DMAEMA-b-A-CD)/Fe 3 O 4 , with both multiresponsive characteristics and emulsifying capabilities had been designed to remove small oil droplets from water. Using the reversible addition−fragmentation chain transfer (RAFT) method, diblock polymers P(DMAEMA-b-A-CD) were grown in a controlled manner on the surface of Fe 3 O 4 . The Fe 3 O 4 core showed responsiveness to a magnetic field, and the block copolymers prepared via the RAFT method demonstrated reactivity to both pH and CO 2 . The P(DMAEMAb-A-CD)/Fe 3 O 4 nanoparticles exhibited the capability to form Pickering/Oxford emulsions with exceptional stabilization properties. It could be observed that the introduction of CO 2 , acid, and a magnetic field led to the breakage of the emulsion, while the emulsion could be restabilized by removing the CO 2 and the magnetic field or by adding alkali. Measurements of interfacial tension, ζ-potential, and contact angle demonstrated that the emulsification/breakdown mechanisms associated with pH and CO 2 /N 2 were related to the surface wettability of the nanoparticles. In addition, the emulsifier had an excellent cycling capacity with at least 10 cycles by CO 2 /N 2 . Additionally, P(DMAEMA-b-A-CD)/Fe 3 O 4 nanoparticles exhibited excellent stability in oil phases with large polarity differences and various real oil phases with different viscosities. Importantly, the P(DMAEMA-b-A-CD)/ Fe 3 O 4 nanoparticles could serve as functional materials for efficiently separating small oil droplets from water through the application of a magnetic field. Therefore, P(DMAEMA-b-A-CD)/Fe 3 O 4 nanoparticles held promising potential as materials with economic and commercial value for oil−water separation applications.

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Section: Introductionmentioning

confidence: 99%

Multiresponsive Behavior of the Pickering Emulsifier and Its Application for Collecting Small Oil Droplets in Water

Li,

Zhang

et al. 2024

Langmuir

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“…As a result, researchers have begun to synthesise bio-based waterborne polyurethanes (WPUs) using water as the dispersion medium and bio-based materials instead of petroleum-based materials. 10–13 Carboxylic acid-containing chain extenders, which introduce carboxyl groups to make the molecular chain hydrophilic, are frequently used in waterborne polyurethanes to improve dispersion in the aqueous phase. Further, polymers containing carboxyl groups can adhere to enamel and dentin surfaces by forming ionic bonds with calcium from hydroxyapatite.…”

Section: Introductionmentioning

confidence: 99%

A novel nerol-segmented waterborne polyurethane coating for the prevention of dental erosion

Huang,

Nie,

Tang

et al. 2024

RSC Adv.

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“…In comparison, lignin, the second most abundant component in plants, is rich in phenolic hydroxyl groups and phenyl rings, and it is used widely in various fields, such as adhesives, − optical switching, nanomaterials, and hydrogels. , Despite significant progress, the heterogeneity and low reactivity of lignin severely limit its applications. Previously, chemical modification, functionalization, or nanotechnology enhanced lignin’s reactivity and performance. For example, Lu et al reported a hydrogel prepared using silver-lignin nanoparticles, which exhibits excellent self-healing capability and long-term stable adhesion.…”

Section: Introductionmentioning

confidence: 99%

“…7,22 Despite significant progress, the heterogeneity and low reactivity of lignin severely limit its applications. Previously, chemical modification, 23 functionalization, 24 or nanotechnology 22 ance. For example, Lu et al 22 reported a hydrogel prepared using silver-lignin nanoparticles, which exhibits excellent selfhealing capability and long-term stable adhesion.…”

Section: ■ Introductionmentioning

confidence: 99%

Facile Strategy to In Situ Synthesize Gallic Acid-Modified Lignin and Its Utilization for Fabricating Conductive and Self-Adhesive Hydrogels as Strain Sensors

Shi,

Wang,

Gao

et al. 2023

Ind. Eng. Chem. Res.

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As lignin is one of the most abundant renewable resources, utilization to fabricate functional hydrogels has gained increasing attention. However, the heterogeneous structure and the few available functional groups of lignin limited its applications. Herein, we presented a simple strategy to synthesize gallic acid (GA)-modified lignin as a key component to prepare conductive hydrogels. The addition of GA during the organic solvent pretreatment of poplar changed the structure of lignin and increased the total content of phenolic hydroxyl groups from 3.20 to 3.89 mmol/g (EOL-G30). Moreover, the enzymatic hydrolysis of pretreated poplar was enhanced from 49.1 to 55.2% (OP-G30) at a low enzyme loading of 5 FPU/g. When using GA-modified lignin to prepare hydrogels, the resulting hydrogel exhibited excellent self-adhesion to various substrates and demonstrated effective free radical scavenging capabilities. When incorporating sodium chloride (NaCl) as conductive ions, the hydrogels exhibit reliable strain-sensing capability. Moreover, they also displayed robust functionality in a low-temperature environment (−20 °C). This study has presented valuable insights to realize in situ modification of lignin and fabricate lignin-based functional materials, offering new perspectives for the biorefinery industry.

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Facile design of renewable lignin copolymers by photoinitiated RAFT polymerization as Pickering emulsion stabilizers

Abstract: As the richest aromatic renewable resource, lignin has attracted significant attention for fabricating various materials. However, due to lignin’s structural complexity, an effective and facile structural modification strategy remains a...

Cited by 11 publications

References 70 publications

Multiresponsive Behavior of the Pickering Emulsifier and Its Application for Collecting Small Oil Droplets in Water

Multiresponsive Behavior of the Pickering Emulsifier and Its Application for Collecting Small Oil Droplets in Water

A novel nerol-segmented waterborne polyurethane coating for the prevention of dental erosion

Facile Strategy to In Situ Synthesize Gallic Acid-Modified Lignin and Its Utilization for Fabricating Conductive and Self-Adhesive Hydrogels as Strain Sensors

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