Aqueous Polymer Solutions Research Articles

Performance evaluation of a commercial protective coating through field-exposure tests on three stone substrates

In the last decades, there have been several studies on Cultural Heritage regarding the performance of protective and consolidating coatings for the prevention of decay. A coating must have several characteristics such as efficiency, breathability, and must be durable and reversible. In this research work, the performance of a commercial protective product (Fosbuild FBLE 200) was evaluated. This coating is composed of a TiO2 nanopowder dispersed in an aqueous solution of an acrylic polymer. The product, which exhibits depolluting, antimicrobial, water-repellent and self-cleaning properties, has been applied on three different lithotypes: Carrara marble, Noto stone, and Comiso stone. Field-exposure tests were carried out in two different outdoor environments (Catania and Palermo) in order to assess its suitability. Promising results were obtained for the Carrara marble after one year of exposure; however, a decrease in effectiveness was observed at the end of the second year.

Exact Solutions of Second-Grade Fluid Equations

The second-grade fluid equations describe the motion of relaxing fluids such as aqueous solutions of polymers. The existence and uniqueness of solutions to the initial–boundary value problems for these equations were studied by D. Cioranescu, V. Girault, C. Le Roux, A. Tani, G. P. Galdi, and others. However, their studies do not contain information about the qualitative properties of solutions of these equations. Such information can be obtained by analyzing their exact solutions, which is the main goal of this work. We study layered flows and a model problem with a free boundary, construct an analog of T. Kármán’s solution, which describes the stationary motion of a second-grade fluid in a half-space induced by the rotation of the plane bounding it, and propose a generalization of V. A. Steklov’s solution of the problem on unsteady helical flows of a Newtonian fluid to the case of a second-grade fluid.

Composites Based on Biodegradable Polymers and Layered Structures

The paper presents the results of mechanical and electrical tests of composite materials based on biodegradable polymers (polyvinyl alcohol, polyacrylamide, starch) and synthetic layered double hydroxides (Ni–Al, Zn–Al) obtained by two-stage (chemical) and one-stage (plasma chemical) methods. The one-stage method for producing composites involves the formation of filler structures during the burning of low-temperature plasma in the bulk of an aqueous polymer solution. Electrode materials were used as precursors. Regardless of the production method, 2D hexagonal structures are formed and embedded in the polymer matrix. This is evidenced by IR spectroscopy data showing shifts in the main characteristic bands and the appearance of new ones. It has been established that layered fillers can be both plasticizers and reinforcing agents. The influence of the viscosity of the polymer matrix on the mechanical characteristics of the composites has been revealed. The introduction of fillers changes the surface roughness, leading to an increase in hydrophobicity of the composites. It has been established that the current–voltage curves of the composites are nonlinear, so that such composites can be considered as flexible analogues of nonlinear electronic components.

Synthesis, characterization, and swelling behavior of a poly(acrylamide‐co‐acrylic acid) copolymer: Application to water retention in two sandy agricultural soils in sub‐Saharan region

AbstractThe application of copolymer hydrogels based on acrylamide (AAm) and acrylic acid (AA) in sub‐Saharan soils can increase the quantity of water retained by the soil and improve plant establishment and growth. The aim of this work was to synthesize and characterize a copolymer based on acrylamide and acrylic acid and to evaluate its swelling capacity with different physicochemical parameters. This study also aimed to investigate the effect of metallic cations on the swelling capacity of the copolymer and to assess the improvement in water retention in sandy soils. The copolymer material was prepared by free‐radical polymerization in aqueous solution at a temperature of 60°C and characterized by Fourier transform infrared (FTIR) and x‐ray diffraction (XRD), and its average molecular weight was estimated from intrinsic viscosity measurements. The swelling capacity was evaluated with different physicochemical parameters, and the effect of metallic cations on the swelling capacity was investigated. Water retention in two sandy soils was also evaluated. The copolymer material containing 50% AAm and 50% AA can retain more than 8100% of water. The swelling ratio increased with increasing temperature, with a maximum swelling ratio at 65°C. The presence of metallic cations reduced the maximum swelling ratio of the copolymer material as the cation concentration increased. The copolymer material at 1% in a composition with the soil showed an improvement in the water retention of 12.2% and 7.9% for soil A and 7.9% for soil B. Soil air volume is improved by 19% for both soils. This study shows that the copolymer material has a high swelling ratio and can improve water retention in sandy soils. The copolymer can be used in agriculture to protect and improve plant growth and yield.Highlights Synthesis and characterization of a copolymer based on acrylamide and acrylic acid. Evaluating the swelling capacity with different physicochemical parameters. The application of this copolymer in sub‐Saharan soils increases the quantity of water retained. The copolymer is prepared by polymerization in aqueous solution and characterized by FTIR and XRD. This study shows that the copolymer has a high swelling ratio and improves water retention.

Tuning Molecular Orientation Responses of Microfluidic Liquid Crystal Dispersions to Colloid and Polymer Flows.

An important approach to molecular diagnostics is integrating organized substances that provide complex molecular level responses to introduced chemical and biological agents with conditions that optimize and distinguish such responses. In this respect, liquid crystal dispersions are attractive components of molecular diagnostic tools. This paper analyzes a colloid system, containing a nematic liquid crystal as a dispersed phase, and aqueous surfactant and polymer solutions as the continuous phases. We applied a microfluidic approach for tuning orientation of liquid crystal molecules in picoliter droplets immobilized on microchannel walls. Introduction of surfactant to the aqueous phase was found to proportionally increase the order parameter of liquid crystal molecules in microdroplets. Infusion of polymer solutions into surfactant-mediated microfluidic liquid crystal dispersions increased the order parameter at much lower surfactant concentrations, while further infusion of surfactant solutions randomized the orientation of liquid crystal molecules. These effects were correlated with the adsorption of surfactant molecules on surfaces of microdroplets, stabilizing the effect of a polymer matrix on bound surfactant ions and the formation of insoluble polymer-colloid aggregates, respectively. The revealed molecular behavior of liquid crystal dispersions may contribute to optimized synthesis of responsive liquid crystal dispersions for in-flow molecular diagnostics of polymers and colloids, and the development of functional laboratory-on-chip prototypes.

DNA-Surfactant Exchange and Quantifying Interactions of Pure (n,m) Single-Enantiomer SWCNTs Towards Biohybrid Self-Assembly

Self-assembled biohybrid nanostructures made from single-wall carbon nanotubes (SWCNTs) and DNA are a promising model system for studying fundamental photo physics phenomena, and have significant potential as building blocks for applications such as biosensing and photovoltaics devices. Precise control of SWCNT bandgap and length in these biohybrid assemblies is highly desirable, but scalable production of such samples often benefits from processing in aqueous polymer and surfactant solutions that are then typically incompatible with DNA-directed assembly. DNA exchange is a promising route for replacing surfactants with self-assembling DNA sequences after these purification steps. Unfortunately, despite advances, DNA exchange remains a challenging technique with limitations due to uncontrolled aggregation and low yields. In this work we focus on improving the process for several well-defined SWCNT samples that are both single chirality and single enantiomer refined through aqueous two-phase separation as well as length sorted to a narrow distribution. With these, we demonstrate improvements in DNA exchange in both yield and control of the aggregation state by modifying DNA exchange processing parameters. We also show that the exchanged DNA-wrapped SWCNTs can be linked together by the addition of a complementary DNA bridge to form self-assembled biohybrid nanostructures for energy transfer studies. We use analytical ultracentrifugation and absorbance and photoluminescence spectroscopies to measure and quantify changes in as these biohybrid structures self-assemble. These developments pave the way for high yield assembly of precise biohybrid nanostructures for energy transfer studies and open potential applications in photovoltaics and biosensing.

A Facile Strategy to Fabricate Tough and Adhesive Elastomers by In Situ Formation of Coordination Complexes as Physical Crosslinks

AbstractCoordination bonds with a dynamic nature and wide‐spectrum bond energy have gained great popularity in use for fabricating tough soft materials. However, most existing coordination‐based elastomers are prepared through complicated procedures, usually involving elaborate synthesis of ligand‐containing monomers or polymers, ion diffusion to form coordination complexes, and removal of organic solvent during the synthesis, which are neither easy operation nor environmentally friendly. Here, a facile and effective strategy is demonstrated to fabricate tough metallosupramolecular elastomers by one‐pot polymerization of aqueous precursor solutions containing commercial agents, 2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid, 2‐[2‐(2‐methoxyethoxy)ethoxy]ethyl acrylate, and Zr4+ ions. After solvent (i.e. water) evaporation, the obtained elastomers are transparent and extremely tough owing to the presence of sulfonate‐Zr4+ coordination complexes as physical crosslinks. Their mechanical properties are tunable over a wide spectrum by adjusting the composition of copolymers and the density of coordination bonds. This eco‐friendly strategy is further extended to various commercial monomers, manifesting good universality to toughen elastomers. Furthermore, the abundant functional groups of copolymers make the elastomers adhesive to various substrates including themselves, favoring applications such as interfacial adhesion and encapsulations. The easy fabrication, tunable mechanical properties, and adhesion ability endow the elastomers with great potential as the substrate of wearable soft electronics.

Synthesis and molecular dynamics simulation of amphoteric hydrophobically associating polymer

To address the practical issues of poor temperature and salt tolerance of polymers, a new amphoteric monomer (E)-N-(docos-13-enoyl)-N-methylglycine named CQ was developed. The polymer CQMP was synthesized by acrylamide (AM) and CQ as an associative monomer and sodium p-styrene sulfonate (SSS) as a functional monomer in aqueous solution. The structure of the products was confirmed by FTIR, 1H NMR and TGA, while the micro-morphology of the polymer was observed by SEM. Taking HAPAM as a control, the properties of polymer in aqueous solution were studied as a function of salinity, shear rate, temperature, and polymer concentration. The oil displacement performance was also evaluated in detail. Additionally, the surface tension (SFT) and interfacial tension (IFT) of CQMP solution were measured. The critical micelle concentration (CMC) values of CQMP in aqueous solution and in NaCl solution are 2.13 g·L-1 and 1.79 g·L-1,respectively. The copolymer can reduce the interfacial tension between water and crude oil from Changqing Oilfield, with an IFT value of about 15.96 mN·m−1. The results indicate that the critical association concentration (CAC) is approximately 600 mg·L-1, and the polymer exhibits good salt tolerance and oil flooding performance. Furthermore, molecular dynamics simulation demonstrated that CQ can enhance intermolecular interactions while maintaining the same hydrophobic chain content, thereby reinforcing the polymer’s resistance temperature and salt. The laboratory flooding experiment showed that the enhance oil recovery of CQMP with 0.5 PV 3000 mg·L-1 was 12.23 % greater than that of HAPAM, which is promising for multiple applications in complex oil fields.

Experimental studies on effectiveness of graphene oxide nanosheets dispersion in water/aqueous PHPA for enhanced oil recovery

Nanoparticle application in enhanced oil recovery is emerging as a novel technology because of their unique characteristics, viz. reduction of IFT, wettability alteration, and stable dispersion in injection water and aqueous polymer solution. In the present study, graphene oxide nanosheets (GONs) are synthesized by modified Hummer's method. The nanosheets are characterized by FTIR, XRD and UV–vis spectroscopy analysis. The size of the nanosheets was confirmed by the AFM and HR-TEM imaging. The stability of nanofluid (NF) with dispersed GONs in the aqueous solution was confirmed by Turbiscan stability analysis, DLS studies and zeta-potential values (less than −34 mV). The experimental research reveals that NF alters the wettability of intermediate oil-wet sandstone reservoir rock with a reduction of contact angle from 112.4° to 17.2°. Further, it is observed that the IFT between oil (decane) and deionized water decreases from 42.34 mN/m to 32.76 mN/m for the NF system. It has been observed that the synthesized GONs can emulsify crude oil, which is also an important mechanism of EOR. The rheological studies show that GONs enhance the viscosity and viscoelastic properties of partially hydrolyzed polyacrylamide (PHPA) polymer. GONs form a robust three-dimensional network structure facilitated by hydrogen bonding with the PHPA polymer chain, which leads to the improvement of sweep efficiency. The core flooding experiment demonstrates that the incremental oil recovery over the conventional water flooding by GONs dispersed in the PHPA polymer with flooding is significantly higher (26% of original oil in place) than that of individual NF and polymer flooding.

Surface decontamination of radioactive cesium by a reversibly cross-linkable hydrogel using poly(vinyl alcohol) and phenylboronic acid-grafted poly(methyl vinyl ether-alt-mono-sodium maleate)

Wide-area surface decontamination is essential during the sudden release of radioisotopes to the public, such as nuclear accidents or terrorist attacks. A self-generated hydrogel comprising a reversible complex between poly(vinyl alcohol) (PVA) and phenylboronic acid-grafted poly(methyl vinyl ether-alt-mono-sodium maleate) (PBA–g–PMVE–SM) was developed as a new surface decontamination coating agent to remove radioactive cesium from surfaces. The simultaneous application of PVA and PBA–g–PMVE–SM aqueous polymer solutions containing sulfur–zeolite to contaminated surfaces resulted in the spontaneous formation of a PBA–diol ester bond-based hydrogel. The sulfur–zeolite suspended in the hydrogel selectively removed 137Cs from the contaminated surface and was easily separated from the dissociable used hydrogel. This removal was performed by simple water rinsing without costly incineration to remove the organic materials for final disposal/storage of the radioactive waste, making it suitable for practical wide-area surface decontamination. In radioactive tests, the hydrogel containing sulfur–chabazite (S–CHA) showed substantial 137Cs removal efficiencies of 96.996% for painted cement and 63.404% for cement, which are 2.33 times better than the values for the commercial surface decontamination coating agent DeconGel. Due to its excellent zeolite ion-exchange ability, our hydrogel system has great potential for removing various hazardous contaminants, including radionuclides, from the surface.

Iron-Coordinated L-Lysine-Based Nanozymes with High Peroxidase-like Activity for Sensitive Hydrogen Peroxide and Glucose Detection.

It is crucial to develop sensitive and accurate sensing strategies to detect H2O2 and glucose in biological systems. Herein, biocompatible iron-coordinated L-lysine-based hydrogen peroxide (H2O2)-mimetic enzymes (Lys-Fe-NPs) were prepared by precipitation polymerization in aqueous solution. The coordinated Fe2+ ion acted as centers of peroxidase-like enzymes of Lys-Fe-NPs, and the catalytic activity was evaluated via the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) by H2O2. Therefore, a sensitive colorimetric detection sensor for H2O2 was constructed with a linear range of 1 to 200 μM and a detection limit of 0.51 μM. The same method could also be applied to highly sensitive and selective detection of glucose, with a linear range of 0.5 to 150 μM and a detection limit of 0.32 μM. In addition, an agarose-based hydrogel biosensor colorimetric was successfully implemented for visual assessment and quantitative detection of glucose. The design provided a novel platform for constructing stable and nonprotein enzyme mimics with lysine and showed great potential applications in biorelevant assays.

Fracturing Fluid Polymer Thickener with Superior Temperature, Salt and Shear Resistance Properties from the Synergistic Effect of Double-Tail Hydrophobic Monomer and Nonionic Polymerizable Surfactant

To develop high-salinity, high-temperature reservoirs, two hydrophobically associating polymers as fracturing fluid thickener were respectively synthesized through aqueous solution polymerization with acrylamide (AM), acrylic acid (AA), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), nonionic polymerizable surfactant (NPS) and double-tail hydrophobic monomer (DHM). The thickener ASDM (AM/AA/AMPS/NPS/DHM) and thickener ASD (AM/AA/AMPS/DHM) were compared in terms of properties of water dissolution, thickening ability, rheological behavior and sand-carrying. The results showed that ASDM could be quickly diluted in water within 6 min, 66.7% less than that of ASD. ASDM exhibited salt-thickening performance, and the apparent viscosity of 0.5 wt% ASDM reached 175.9 mPa·s in 100,000 mg/L brine, 100.6% higher than that of ASD. The viscosity of 0.5 wt% ASDM was 85.9 mPa·s after shearing for 120 min at 120 °C and at 170 s−1, 46.6% higher than that of ASD. ASDM exhibited better performance in thickening ability, viscoelasticity, shear recovery, thixotropy and sand-carrying than ASD. The synergistic effect of hydrophobic association and linear entanglement greatly enhancing the performance of ASDM and the compactness of the spatial network structure of the ASDM was enhanced. In general, ASDM exhibited great potential for application in extreme environmental conditions with high salt and high temperatures.

Temperature-Responsive Lactic Acid-Based Nanoparticles by RAFT-Mediated Polymerization-Induced Self-Assembly in Water.

This work demonstrates for the first-time biobased, temperature-responsive diblock copolymer nanoparticles synthesized by reversible addition-fragmentation chain-transfer (RAFT) aqueous emulsion polymerization-induced self-assembly (PISA). Here, monomers derived from green solvents of the lactic acid portfolio, N,N-dimethyl lactamide acrylate (DMLA) and ethyl lactate acrylate (ELA), were used. First, DMLA was polymerized by RAFT aqueous solution polymerization to produce a hydrophilic PDMLA macromolecular chain transfer agent (macro-CTA), which was chain extended with ELA in water to form amphiphilic PDMLA-b-PELA diblock copolymer nanoparticles by RAFT aqueous emulsion polymerization. PDMLAx homopolymers were synthesized targeting degrees of polymerization, DPx from 25 to 400, with relatively narrow molecular weight dispersities (Đ < 1.30). The PDMLA64-b-PELAy diblock copolymers (DPy = 10-400) achieved dispersities, Đ, between 1.18 and 1.54 with two distinct glass transition temperatures (Tg) identified by differential scanning calorimetry (DSC). Tg(1) (7.4 to 15.7 °C) representative of PELA and Tg(2) (69.1 to 79.7 °C) of PDMLA. Dynamic light scattering (DLS) studies gave particle z-average diameters between 11 and 74 nm (PDI = 0.04 to 0.20). Atomic force microscopy (AFM) showed evidence of spherical particles when dispersions were dried at ∼5 °C and film formation when dried at room temperature. Many of these polymers exhibited a reversible lower critical solution temperature (LCST) in water with a concomitant increase in z-average diameter for the PDMLA-b-PELA diblock copolymer nanoparticles.

CO2-switchable thermoresponsiveness of poly(N,N-(diethylamino)ethyl acrylamide)-based homo- and copolymers in water

The properties of thermo-sensitive polymers can be easily and reversibly switched using addition/removal of carbon dioxide (CO2) as an innovative and ecological trigger. N,N-(diethylamino)ethyl acrylamide (DEAEAM) was copolymerized with N-isopropylacrylamide (NIPAM) by Reversible Addition-Fragmentation chain Transfer (RAFT) polymerization to obtain copolymers with various compositions and architectures. The properties (solubility, aggregation behavior…) of these polymers in aqueous solution in the presence of CO2 was studied via scattering, microscopy and turbidimetry measurements. The copolymerization of DEAEAM monomer with NIPAM enables to produce either statistical or diblock copolymers and to tune the cloud point temperature of obtained copolymers either by changing the composition or the architecture (statistical, block) or by CO2 addition/removal. Whereas, for a given composition, statistical copolymer does not display thermoresponsive behavior, block copolymers present a thermoresponsiveness which depends on the protonation degree of tertiary amine functions. Additionally, CO2 can be used to reversibly modulate the properties of these materials in aqueous media.

Synthesis and Properties of a Dendrimer Amphiphilic Polymer as Enhanced Oil Recovery Chemical

A dendrimer amphiphilic polymer (A-D-HPAM) was synthesized by aqueous solution polymerization of acrylic acid (AA), acrylamide (AM), 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS), hydrophobic monomer of cetyl dimethyl allyl ammonium chloride (DMCAAC-16), and skeleton monomer of GA1.0, using ammonium persulfate and sodium bisulfite as initiators. The chemical structure of A-D-HPAM was, respectively, analyzed by Fourier transform infrared spectrometer (FTIR), nuclear magnetic resonance (NMR) spectroscopy, and scanning electron microscope (SEM). The tackifying property, the resistance of shear, temperature and salt, the interfacial tension, and the oil displacement performance of A-D-HPAM were determined. Compared with solutions of HPAM (hydrolyzed polyacrylamide) and HPAM-SDBS (sodium dodecyl benzene sulfonate), A-D-PAM exhibits the optimal properties, especially achieving the enhanced oil recovery (EOR) of 15.1%.

Tuning Dry and Wet Adhesion with a Branched Supramolecular Polymer Solution

Endowing adhesives with both dry and wet adhesion to surfaces from hard substrates to soft biological tissues is challenging. Herein, a branched supramolecular polymer is introduced in dry‐ and wet‐crosslinking forms to adaptively achieve dry and wet interfacial adhesion. The branched supramolecular polymer (PAMU) with multiple pendant functional moieties is prepared by one‐pot reversible addition‐fragmentation chain transfer polymerization. The PAMU polymer solution can firmly adhere to glass sheets after the water evaporates. The aqueous solution of PAMU polymer with residual double bonds can be further polymerized to form a wet crosslinking network. The hydrogen bonding moieties endow the supramolecular network with self‐healing properties, while the in situ polymerization of the PAMU polymer leads to stable adhesion to wet tissues. This study provides a promising approach to develop supramolecular adhesives for versatile adhesion applications.

Fabrication and swelling properties of a novel superabsorbent composite derived from waste coal gangue

In this work, novel superabsorbent composites made of starch-grafted-polyacrylic acid/coal gangue were prepared via aqueous solution polymerization. The starch-g-polyacrylic acid/coal gangue (St-g-PAA/CG) composite with 10 wt.% CG showed the maximum water absorbency in distilled water (560 g·g−1) and a 0.9 wt.% NaCl solution (102 g·g−1). Moreover, this superabsorbent composite exhibited fine thermal stability and its swelling behavior was dependent on pH. In general, the swelling kinetics of the superabsorbent composites fitted with the Scott’s kinetic model. These composites not only showed excellent water absorption reversibility after five absorption/drying cycles, but also exhibited considerable environmental responsiveness after the swelling medium was changed from distilled water to the 0.9 wt.% NaCl solution. Based on these results, the prepared superabsorbent composites can be applied in several fields such as horticulture, agriculture, health care, and controlled drug delivery, while ensuring comprehensive utilization of solid wastes.

Quenching with Aqueous Polymer Solutions

Abstract Quenching with aqueous polymer solutions has some distinct advantages over classical oil quenching. Among these are the good environmental properties and the possibility to adjust the quenching performance between oil and water quenching. Nevertheless, critical aspects must also be taken into account. When quenching steel parts with polymer solutions, “explosion-like” phenomena can occur, often accompanied by large cooling rate changes. These “explosions” can lead to pressure waves and vibrations in the quenching tank, which in the long run can even destroy weld seams of the quenching tank. In the framework of a research project, experimental investigations were carried out in a laboratory quenching bath and in an industrial quenching tank. The polymer type, the type of incident flow, the flow velocity, the bath temperature and the size of the test shafts were varied. Near-surface temperature measurements inside the shafts were performed to characterize the resulting quenching processes. Simultaneously, electrical conductivity measurements and audio and video recordings were made to localize insulating films on the surface and their collapse. To systematize and characterize the large number of measurement results, characteristic types of cooling processes and characteristic numbers for their characterization were defined and will be presented in this paper.

Evaluation of finite element simulation of water quenched cracking for medium carbon alloy steels using acoustic emission technique

Quenching is an important technology for enhancing strength of steels. It is the development tendency of heat treatment to replace both polluted oil quenching and polymer aqueous solution quenching with clean water quenching. However, the problem of easy cracking of medium carbon alloy steels quenched in water has long been a concern for many researchers. Although the finite element simulation (FES) can be used to predict tensile transient stress concentration that may lead cracking during quenching, there has been a lack of experiments to confirm the time of cracking during water quenching. And this problem which has long puzzled us has recently been solved, that is, the occurrence time of quenching cracking can be detected by acoustic emission (AE) technology used k-means clustering method to process AE signals. The results indicate that the cracking time of water quenching for a AISI 4140 medium carbon alloy steel cylinder sample is 11–15 s, which is well consistent with 9–13 s predicted by FES. Moreover, FES reveals that the quenching cracking is caused by the tangential tensile stress in the surface layer, and it is also confirmed by the macroscopical observation. Besides, the FES shows that the tensile stress value leading to water-quenching cracking is far lower than yield strength, which reveals that quenching cracking is a brittle failure under low stress state. The study indicates the high accuracy of our FES, which provides a new path for the process design to avoid water quenching cracking.

An Injectable Self‐Crosslinked Wholly Supramolecular Polyzwitterionic Hydrogel for Regulating Microenvironment to Boost Infected Diabetic Wound Healing

AbstractIt is highly desirable yet significantly challenging to fabricate injectable, self‐crosslinked, self‐fused, and antifouling polyzwitterionic hydrogels, whose successful preparation will expand their application scope in biomedical fields. Herein, for the first time, a novel zwitterionic monomer, carboxybetaine urethane acrylate (CBUTA) is designed and synthesized with a urethane group and zwitterion on the same side chain. The strong inter‐urethane H‐bonds and zwitterionic dipole–dipole interactions of side chains contribute to self‐crosslinked wholly supramolecular polyzwitterionic hydrogel that is directly formed from photoinitiated polymerization of CBUTA aqueous solution without adding any chemical crosslinkers. After being swollen in water, the polyCBUTA (PCBUTA) hydrogel is squeezed into small particles and freeze‐dried to obtain hydrogel powder. The injectable and wholly zwitterionic supramolecular PCBUTA hydrogel can be easily reconstructed by mixing hydrogel powder with water due to the recombination of H‐bonds of urethane groups and zwitterionic dipole–dipole interactions. The re‐formed PCBUTA hydrogel exhibits an excellent self‐fused and antifouling ability, and this injectable PCBUTA hydrogel, endowed with a microenvironment‐regulated function, demonstrates excellent glucose consumption, antioxidation, antibacterial, and angiogenesis ability, thus accelerating the infected diabetic wound healing. Overall, this work provides a promising strategy to develop injectable and wholly zwitterionic hydrogels that will find broad biomedical applications.