Controlled Growth of Ultra‐Thick Polymer Brushes via Surface‐Initiated Atom Transfer Radical Polymerization with Active Polymers as Initiators

Zeng, Yiyang; Xie, Lei; Chi, Fangting; Liu, Dejian; Wu, Haoyan; Pan, Ning; Sun, Guangai

doi:10.1002/marc.201900078

Cited by 41 publications

(11 citation statements)

References 56 publications

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“…For example, when applied in a lubricating system, a small thickness could barely achieve macroscopic contact, thereby leading to an abrasive wear and increasing friction . Thus, PBs with thickness of ∼1 μm can be used in several applications. − …”

Section: Introductionmentioning

confidence: 99%

Controlled Synthesis of Concentrated Polymer Brushes with Ultralarge Thickness by Surface-Initiated Atom Transfer Radical Polymerization under High Pressure

et al. 2019

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The synthesis of ultrathick concentrated poly-(methyl methacrylate) (PMMA) brushes by atom transfer radical polymerization (ATRP) was investigated. The reactions were performed with a catalyst system of Cu(I)Br/dinonyl-2,2′bipyridine (dN-bipy) and Cu(II)Br 2 /dN-bipy at 60 °C under a high pressure of 500 MPa. The equilibrium constant for this catalyst system was determined to be 1.5 × 10 −6 , which followed the kinetics study and indicated good polymerization rate control. Under the high pressure of 500 MPa, a micrometer scale thick PMMA brush was obtained. During chain growth under the high pressure, the concentration of the deactivator catalyst was demonstrated to significantly affect the graft density of PMMA brushes, which was correlated to the number of monomers added in activation−deactivation cycles. A novel "cutoff" experiment and gel permeation chromatography demonstrated similar propagation for free polymers and graft polymers even under high pressure.

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Section: Introductionmentioning

confidence: 99%

Controlled Synthesis of Concentrated Polymer Brushes with Ultralarge Thickness by Surface-Initiated Atom Transfer Radical Polymerization under High Pressure

et al. 2019

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“…7,62 Typically, initiatorfunctionalized GO (0.20 mg), EC (12.0 g), AN (10.0 g), CuBr 2 (0.00180 g), Me 6 TREN (0.0180 g), and AA (0.0470 g) were added in a 50 mL flask, followed by deoxygenization via vacuuming and back filling with nitrogen three times. 7,62 Typically, initiatorfunctionalized GO (0.20 mg), EC (12.0 g), AN (10.0 g), CuBr 2 (0.00180 g), Me 6 TREN (0.0180 g), and AA (0.0470 g) were added in a 50 mL flask, followed by deoxygenization via vacuuming and back filling with nitrogen three times.…”

Section: Modification Of Go With Ebibmentioning

confidence: 99%

Polymer brushes on graphene oxide for efficient adsorption of heavy metal ions from water

Liu

Ding

Chi

et al. 2019

J of Applied Polymer Sci

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The pollution of heavy metal ions in water poses a serious threat to human being and ecosystems. Here, we report polyamidoxime (PAO) brush grafted graphene oxide (GO) as a highly efficient adsorbent for extraction of toxic metal cations from water. Surface-initiated atom transfer radical polymerization was used to grow polyacrylonitrile (PAN) brushes on GO, followed by conversion of the nitrile groups in PAN into amidoxime groups, which had high binding affinity toward heavy metal cations. The PAO brush grafted GO demonstrated significantly fast adsorption kinetics and large adsorption capacity. At optimal pH 5, the PAO brush grafted GO can achieve maximum adsorption capacities of 116.7 mg g −1 for Pb(II), 258.6 mg g −1 for Ag(I), 192.2 mg g −1 for Cu(II), and 167.9 mg g −1 for Fe(III), which were significantly larger than those of small molecule functionalized GO. Mechanism analysis suggested that the enhanced adsorption performance was due to the myriads of functional groups in PAO brushes that were easily accessible to metal ions because of the swelling of the polymer brushes in water.

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“…On-surface growth of polymer brushes is a widely employed method for developing polymer coatings . Surface-initiated controlled radical polymerization (SI-CRP) methods have been developed to control the thickness of polymer brushes and functionalize the targeted pattern on a surface. , CRP in the solution phase has been applied successfully for surface-initiated polymerization using various strategies, including nitroxide-mediated polymerization (NMP), atom transfer radical polymerization (ATRP), ,, and reversible addition fragmentation chain transfer (RAFT) polymerization, − all of which have unique advantages and disadvantages. For example, ATRP using metal catalysts raises concerns regarding possible metal residues after polymerization that may constrain applications in certain areas.…”

Section: Introductionmentioning

confidence: 99%

Open-to-Air RAFT Polymerization on a Surface under Ambient Conditions

et al. 2020

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Oxygen (O2)-mediated controlled radical polymerization was performed on surfaces under ambient conditions, enabling on-surface polymer brush growth under open-to-air conditions at room temperature in the absence of metal components. Polymerization of zwitterionic monomers using this O2-mediated surface-initiated reversible addition fragmentation chain-transfer (O2-SI-RAFT) method yielded hydrophilic surfaces that exhibited anti-biofouling effects. O2-SI-RAFT polymerization can be performed on large surfaces under open-to-air conditions. Various monomers including (meth)acrylates and acrylamides were employed for O2-SI-RAFT polymerization; the method is thus versatile in terms of the polymers used for coating and functionalization. A wide range of hydrophilic and hydrophobic monomers can be employed. In addition, the end-group functionality of the polymer grown by O2-SI-RAFT polymerization allowed chain extension to form block copolymer brushes on a surface.

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Controlled Growth of Ultra‐Thick Polymer Brushes via Surface‐Initiated Atom Transfer Radical Polymerization with Active Polymers as Initiators

Cited by 41 publications

References 56 publications

Controlled Synthesis of Concentrated Polymer Brushes with Ultralarge Thickness by Surface-Initiated Atom Transfer Radical Polymerization under High Pressure

Controlled Synthesis of Concentrated Polymer Brushes with Ultralarge Thickness by Surface-Initiated Atom Transfer Radical Polymerization under High Pressure

Polymer brushes on graphene oxide for efficient adsorption of heavy metal ions from water

Open-to-Air RAFT Polymerization on a Surface under Ambient Conditions

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