Stimuli-Responsive Polymers for Sensing and Reacting to Environmental Conditions

Zhang, Qiang; Zhang, Yingnan; Wan, Yu; Carvalho, Wildemar S.P.; Hu, Liang; Serpe, Michael J.

doi:10.1016/j.progpolymsci.2021.101386

Cited by 76 publications

(51 citation statements)

References 215 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…β is the slope parameter and IP is the inflection point of a hydrogel. The pH-responsive swelling parameter of the SHs at 25 and 40 • C were calculated from Equation (6). The correlation coefficients of the graphs drawn according to the proposed equation are 0.996 and above, indicating that the sigmoidal 4-parameter equation can be used to find the transition points of smart hydrogels.…”

Section: Swelling Experimentsmentioning

confidence: 98%

“…Three-dimensional cross-linked polymeric structures that love water are called hydrogels [1][2][3], and those that respond to external stimuli (such as pH, temperature, ionic strength, electric field, light, magnetic field, and so forth) as volume changes are called smart or intelligent or stimuli-responsive hydrogels [4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Temperature responsivity of smart hydrogels can be achieved with hydrophobic monomers ((such as N-isopropyl acrylamide, vinyl methylether, N-methyl acrylamide, N,N-dimethyl acrylamide, N-tert-butyl acrylamide), and pH and ionic responsivity can be achieved with ionizable organic acidic or basic monomers (such as methacrylic acid, crotonic acid, itaconic acid, mesaconic acid, aconitic acid or dimethyl amino ethyl methacrylate, diethyl amino ethyl methacrylate, vinyl pyrrolidone, vinyl imidazole) [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Below the LCST, the compatibility of the gel with water increases, and swelling is observed. This is explained by the strengthening of hydrogen bonds between water molecules and hydrophilic groups [4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…The resulting positive charges repel each other, water diffusion is achieved, and swelling is observed in the gel. This swelling shrinkage transition pH is called the inflection point (IP) [4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Smart Hydrogels: Preparation, Characterization, and Determination of Transition Points of Crosslinked N-Isopropyl Acrylamide/Acrylamide/Carboxylic Acids Polymers

Işıkver

Saraydın

2021

Gels

View full text Add to dashboard Cite

Smart hydrogels (SH) were prepared by thermal free radical polymerization of N-isopropyl acrylamide (NIPAAm), acrylamide (AAm) with acrylic acid (A) or maleic acid (M), and N, N′-methylene bisacrylamide. Spectroscopic and thermal characterizations of SHs were performed using FTIR, TGA, and DSC. To determine the effects of SHs on swelling characteristics, swelling studies were performed in different solvents, solutions, temperatures, pHs, and ionic strengths. In addition, cycle equilibrium swelling studies were carried out at different temperatures and pHs. The temperature and pH transition points of SHs are calculated using a sigmoidal equation. The pH transition points were calculated as 5.2 and 4.2 for SH-M and SH-A, respectively. The NIPAAm/AAm hydrogel exhibits a critical solution temperature (LCST) of 28.35 °C, while the SH-A and SH-M hydrogels exhibit the LCST of 34.215 °C and 28.798 °C, respectively, and the LCST of SH-A is close to the body. temperature. Commercial (CHSA) and blood human serum albumin (BHSA) were used to find the adsorption properties of biopolymers on SHs. SH-M was the most efficient SH, adsorbing 49% of CHSA while absorbing 16% of BHSA. In conclusion, the sigmoidal equation or Gaussian approach can be a useful tool for chemists, chemical engineers, polymer and plastics scientists to find the transition points of smart hydrogels.

show abstract

Section: Swelling Experimentsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Smart Hydrogels: Preparation, Characterization, and Determination of Transition Points of Crosslinked N-Isopropyl Acrylamide/Acrylamide/Carboxylic Acids Polymers

Işıkver

Saraydın

2021

Gels

View full text Add to dashboard Cite

show abstract

Recent Advances in the Additive Manufacturing of Stimuli‐Responsive Soft Polymers

Tariq,

Arif,

Khalid

et al. 2023

Adv Eng Mater

View full text Add to dashboard Cite

Stimuli‐responsive polymers (SRPs) are special types of soft materials, which have been extensively used for developing flexible actuators, soft robots, wearable devices, sensors, self‐expanding structures, and biomedical devices, thanks to their ability to change their shapes and functional properties in response to external stimuli including light, humidity, heat, pH, electric field, solvent, and magnetic field or combinations of two or more of these stimuli. In recent years, additive manufacturing (AM) aka three‐dimensional (3D) printing technology of these SRPs, also known as four‐dimensional (4D) printing, has gained phenomenal attention in different engineering fields, thanks to its unique ability to develop complex, personalized, and innovative structures, which undergo twisting, elongating, swelling, rolling, shrinking, bending, spiraling, and other complex morphological transformations. Herein, an effort has been made to provide insightful information about the AM techniques, type of SRPs, and their applications including, but not limited to tissue engineering, soft robots, bionics, actuators, sensors, construction, and smart textiles. This article also incorporates the current challenges and prospects, hoping to provide an insightful basis for the utilization of this technology in different engineering fields. It is expected that the amalgamation of 3D printing with SRPs would provide unparalleled advantages in different engineering arenas.This article is protected by copyright. All rights reserved.

show abstract

Intrinsically Electron Conductive, Antibacterial, and Anti‐swelling Hydrogels as Implantable Sensors for Bioelectronics

Xia

Liang

Sun

et al. 2022

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

New materials and devices for bioelectronics have emerging applications in healthcare monitoring and disease diagnostics. Hydrogel‐based sensors face great challenges in achieving desirable synergistic performances including intrinsical electron conduction, bacterial resistance, anti‐swelling property, and adhesion to tissues. To address current bottlenecks, poly(Cu‐arylacetylide) derived hydrogels are developed for the first time that demonstrates all these above intriguing performances as a result of the special Cu‐arylacetylide backbone. The hydrogels show the capability of recording electrocardiogram (ECG), electromyogram, implantable epicardial ECG, and transmitting neural signals. Furthermore, the Cu (I) in polymer chains can be substituted by other metal ions such as Au (I), which can create numerous new materials with intriguing performances. This study not only creates a new research field of hydrogels but advances design concepts for implantable electrodes to record bio‐electron.

show abstract

Stimuli-Responsive Polymers for Sensing and Reacting to Environmental Conditions

Cited by 76 publications

References 215 publications

Smart Hydrogels: Preparation, Characterization, and Determination of Transition Points of Crosslinked N-Isopropyl Acrylamide/Acrylamide/Carboxylic Acids Polymers

Smart Hydrogels: Preparation, Characterization, and Determination of Transition Points of Crosslinked N-Isopropyl Acrylamide/Acrylamide/Carboxylic Acids Polymers

Recent Advances in the Additive Manufacturing of Stimuli‐Responsive Soft Polymers

Intrinsically Electron Conductive, Antibacterial, and Anti‐swelling Hydrogels as Implantable Sensors for Bioelectronics

Contact Info

Product

Resources

About