Zero‐Carbon Emission Chemical Method to Remove Formaldehyde without Catalyst by Highly Porous Polymer Composites at Room Temperature

Abstract

Herein, the fabrication of reduced graphene oxide (RGO)‐templated polymer composites for chemical removal of gaseous formaldehyde under ambient conditions is presented. The chemical removal of formaldehyde is achieved by a nucleophilic addition reaction between formaldehyde and aminooxy groups on the polymer chain ends to form the oxime bonds with the only byproduct of H2O. RGO is essential since it not only has an ultralarge surface area but also can act as a perfect template for immobilizing pyrene‐terminated and aminooxy‐functionalized polymers via strong π–π stacking interactions, while melamine foam provides a three‐dimensional skeleton for loading RGO/polymer composites to afford a porous 3D structure for efficient formaldehyde removal. Since the oxime bond can be cleaved into aminooxy group in acidic media, the RGO/polymer composite can be regenerated for repeatable usage, which shows an excellent performance of adsorbing 14 mg of formaldehyde by 100 mg of the polymer at ambient condition.

In Situ Synthesis of Branched Block Copolymer Assemblies via RAFT Dispersion Polymerization Using Branched Macro‐RAFT Agents†

“…Over the past thirteen years or so, polymerization‐induced self‐assembly (PISA) has become an efficient and versatile approach for the synthesis of various block copolymer assemblies at high polymer concentrations (10—50 wt%). [ 5‐43 ] PISA involves the growth of a second block from a soluble precursor block that forms a block copolymer. The second block becomes insoluble as increasing the molar mass, which drives in situ self‐assembly of the block copolymer during polymerization.…”

Removal of Formaldehyde and Its Analogues Using a Hybrid Assembly of Pyrene-Modified Hydrazide and rGO: A Negative Carbon Emission and Green Chemical Decomposition Method

“…Most significantly, the only by-product is H 2 O demonstrating an environment friendly and sustainable process for formaldehyde removal . Recently, difunctional molecules with pyrene and −ONH 2 moieties were successfully prepared in our group and then attached onto reduced graphene oxide (rGO) sheets through π–π stacking interaction to make a composite for gaseous formaldehyde removal. , Despite the method being effective in removing formaldehyde, the cost of raw materials containing ammonoxy functional groups is relatively high due to the tedious synthesis of the difunctional molecules. Encouraged by these results, we are keen to develop other chemical methods with a low cost for potential commercialization.…”

“…34 Recently, difunctional molecules with pyrene and −ONH 2 moieties were successfully prepared in our group and then attached onto reduced graphene oxide (rGO) sheets through π−π stacking interaction to make a composite for gaseous formaldehyde removal. 35,36 Despite the method being effective in removing formaldehyde, the cost of raw materials containing ammonoxy functional groups is relatively high due to the tedious synthesis of the difunctional molecules.…”