Construction and Properties of New-Type Photo-Responsive Molecular Imprinting Materials

Li, Baohe; Lian, Jiqin; Wang, Yurong; Li, Chenran; Yu, Dihua; Wang, Nong

doi:10.1134/s0965545x22700572

Cited by 1 publication

(2 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Photoresponsive functional monomers were first synthesized based on the modified synthetic routines , (see Supporting Information S1). Meanwhile, to enhance the hydrophobic properties of the materials, trifluoromethoxyl groups were introduced into photoresponsive blocks, suitable for complex aquatic environments.…”

Section: Methodsmentioning

confidence: 99%

“…Since azobenzene transforms from a trans conformation having weaker polarity to the stronger polar cis conformation, its hydrophilicity and oleophobicity also increase, thereby achieving light-regulated water–oil separation, and this process is reversible. Photoresponsive switchable wettability grafted intelligent polymers can hence simultaneously display in situ some external stimuli responsiveness to achieve controllable wettability switching. − …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Characteristics of Smart Coating Materials for Reversible Double Stimulus-Responsive Oil–Water Separation

Zhang,

Wang,

Qiu

et al. 2024

ACS Appl. Polym. Mater.

Self Cite

View full text Add to dashboard Cite

The developed smart coating for water−oil separation, characterized by its mild separation conditions, ease of control, and absence of secondary pollution, holds promising potential for applications in controlled liquid transmission, oil−water separation, smart textiles, and biosensing films. This work focused on synthesizing copolymers that respond to both photon and pH stimuli. Initially, 4-trifluoromethoxy-4′-methacryloxyazobenzene (FMAB) and similar monomers, serving as photon-responsive units with varying carbon chain lengths, were synthesized using different synthetic routes. Such a design approach also aimed to enhance the hydrophobic characteristics of the photoresponsive segments to a certain degree. Theoretically, the impact of the carbonyl position on nucleophilic substitution reactions was investigated through density functional theory (DFT) calculations. These monomers were subsequently copolymerized individually with dimethylaminoethyl methacrylate (DMAEMA), which acts as a pH-responsive unit, using the reversible addition−fragmentation chain transfer (RAFT) technique in a one-step copolymerization process. The polymers were subsequently coated onto glass slides to form films, the contact angles of which could be modulated in response to both light and pH stimuli. To be highlighted, the maximum contact angle change can reach 131°under double stimulation. To ultimately showcase its oil−water separation capabilities, the polymer was combined with a nonwoven fabric to create a membrane. This membrane is capable of reversibly transitioning between hydrophilic−lipophobic and hydrophobic− lipophilic states, demonstrating substantial potential for future advancements in efficient water−oil separation.

show abstract

Section: Methodsmentioning

confidence: 99%