Preparation and characterization of superabsorbent polymers (SAPs) surface-crosslinked with polycations

Lee, Kyung Min; Min, Ji Hong; Oh, Seunghee; Lee, Hyungsuk; Koh, Won Gun

doi:10.1016/j.reactfunctpolym.2020.104774

Cited by 16 publications

(12 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mechanical properties of the PDMS substrates were measured using a custom-made indenter consisting of a load cell and an automated stage (22)(23)(24). A spherical tip with a diameter of 5 mm was used for the indentation.…”

Section: Characterization Of Mechanical Properties Of Pdms Substratementioning

confidence: 99%

Matrix Stiffening Enhances DNCB-Induced IL-6 Secretion in Keratinocytes Through Activation of ERK and PI3K/Akt Pathway

Chung

Shin

et al. 2021

Front. Immunol.

Self Cite

View full text Add to dashboard Cite

Matrix stiffness, a critical physical property of the cellular environment, is implicated in epidermal homeostasis. In particular, matrix stiffening during the pathological progression of skin diseases appears to contribute to cellular responses of keratinocytes. However, it has not yet elucidated the molecular mechanism underlying matrix-stiffness-mediated signaling in coordination with chemical stimuli during inflammation and its effect on proinflammatory cytokine production. In this study, we demonstrated that keratinocytes adapt to matrix stiffening by increasing cell–matrix adhesion via actin cytoskeleton remodeling. Specifically, mechanosensing and signal transduction are coupled with chemical stimuli to regulate cytokine production, and interleukin-6 (IL-6) production is elevated in keratinocytes on stiffer substrates in response to 2,4-dinitrochlorobenzene. We demonstrated that β1 integrin and focal adhesion kinase (FAK) expression were enhanced with increasing stiffness and activation of ERK and the PI3K/Akt pathway was involved in stiffening-mediated IL-6 production. Collectively, our results reveal the critical role of matrix stiffening in modulating the proinflammatory response of keratinocytes, with important clinical implications for skin diseases accompanied by pathological matrix stiffening.

show abstract

Section: Characterization Of Mechanical Properties Of Pdms Substratementioning

confidence: 99%

Matrix Stiffening Enhances DNCB-Induced IL-6 Secretion in Keratinocytes Through Activation of ERK and PI3K/Akt Pathway

Chung

Shin

et al. 2021

Front. Immunol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In particular, excellent CRC values and decent AUL and permeability values were obtained at 17.5 min of surface-crosslinking time. According to Lee et al, the surface-crosslinked layer thickens as the surface-crosslinking time increases [ 34 ]. Nevertheless, the AUL and permeability values could be improved by changing the surface-crosslinking thickness by adjusting the amount of water in the surface-crosslinking solution.…”

Section: Resultsmentioning

confidence: 99%

“…Ha et al produced AA-based SAPs containing different amounts of ethylene glycol diglycidyl ether and measured the thicknesses of their surface-crosslinked layers using a fluorescent dye [ 33 ]. Lee et al compared the performances of AA-based SAPs according to surface-crosslinking time and the amount of polyethylene imine used as a surface-crosslinking agent: the thickness of the surface-crosslinked layer increased, and the absorbency decreased with increased surface-crosslinking time [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Monomer Composition and Surface-CrossLinking Condition on Biodegradation and Gel Strength of Super Absorbent Polymer

Kim

Lee

2021

Polymers

View full text Add to dashboard Cite

In this study, a superabsorbent polymer (SAP) comprising poly (IA-co-cellulose-co-VSA-co-AA; ICVA) core-SAP (CSAP) was synthesized through radical polymerization using itaconic acid (IA), acrylic acid (AA), cellulose, and vinyl sulfonic acid (VSA) as monomers. The absorption performances and relative biodegradability of various compositions prepared by adjusting the amounts of cellulose and VSA with constant IA and AA content were compared. Increasing the cellulose content in CSAP contributed to improved biodegradation of the surface-crosslinked SAP (SSAP) and gel strength, although the free absorbency (FA) and centrifuge retention capacity (CRC) decreased. Increasing the VSA content resulted in strong anionicity, which enables the absorption of large amounts of water. Surface-crosslinking technology was applied to the CSAP synthesized with the optimal composition ratio to increase its absorption performance and gel strength. Improved performance of the synthesized SSAP (a CRC of 30.4 g/g, absorbency under load (AUL) of 23.3 g/g, and permeability of 55 s) was achieved by selecting the optimal surface-crosslinking treatment time and the amount of distilled water in the surface-crosslinking solution: as the latter was increased in the surface-crosslinking solution, the AUL and permeability of the SSAP were improved, and its biodegradability was found to be 54% compared to the 100% biodegradable cellulose hydrogel in the control group.

show abstract

“…22 The characteristic peaks for the sulfonic acid group of AMPS arise at 1190 and 1046 cm −1 . 23 However, peaks by vinyl bonds of IA, AA and AMPS were not found in them.…”

Section: Ftir Analysismentioning

confidence: 96%

Itaconic‐acid‐based superabsorbent polymer with high gel strength and biocompatibility

Kwon

Kim

et al. 2022

Polymer International

View full text Add to dashboard Cite

An elaborate surface-crosslinking method was introduced to enhance the low absorbency under load (AUL) and liquid permeability of itaconic-acid-based superabsorbent polymer (SAP). The effects of the surface-crosslinking reaction parameters of the absorption properties of the SAP were investigated. An increase in the content of distilled water and 1,4-butanediol used as the surface-crosslinking solution improved the AUL and liquid permeability of the SAP, whereas an increase in the distilled water content resulted in a sharp decrease in the centrifuge retention capacity (CRC) of the SAP. Therefore, controlling the content of 1,4-butanediol is an effective strategy to improve the AUL while maintaining the CRC of the SAP to some extent. Increasing the surface-crosslinking temperature tends to decrease the CRC of the SAP. The AUL of the SAP is the highest at a reaction temperature of 160 °C. As a result, the SAP prepared under optimal surface-crosslinking conditions showed a CRC, AUL and liquid permeability of 36.0, 27.2 g g -1 and 80 s, respectively. The cell viability and cytotoxicity of the SAP on human dermal fibroblasts were confirmed using a live/dead assay and the adapted method from the ISO 10993-5 protocol. These investigations suggested that itaconic-acid-based SAPs could be potential materials for diaper products.

show abstract

Preparation and characterization of superabsorbent polymers (SAPs) surface-crosslinked with polycations

Cited by 16 publications

References 34 publications

Matrix Stiffening Enhances DNCB-Induced IL-6 Secretion in Keratinocytes Through Activation of ERK and PI3K/Akt Pathway

Matrix Stiffening Enhances DNCB-Induced IL-6 Secretion in Keratinocytes Through Activation of ERK and PI3K/Akt Pathway

The Influence of Monomer Composition and Surface-CrossLinking Condition on Biodegradation and Gel Strength of Super Absorbent Polymer

Itaconic‐acid‐based superabsorbent polymer with high gel strength and biocompatibility

Contact Info

Product

Resources

About