Swelling, mechanical and friction properties of PVA/PVP hydrogels after swelling in osmotic pressure solution

Yan, Shi; Xiong, Dangsheng; Liu, Yuntong; Wang, Nan; Zhao, Xueyan

doi:10.1016/j.msec.2016.04.042

Cited by 82 publications

(47 citation statements)

References 41 publications

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“…Understanding hydrogel swelling is critical for drug release applications or stress dissipation mechanisms in articular cartilage. [ 75–77 ] Figure shows the minimal impact that each of the top performing additives had on the ability of the hydrogel to swell in deionized water at room temperature according to the procedure described in Hydrogel Swelling of the Experimental Section.…”

Section: Introduction Of Synthetic Hydrogelsmentioning

confidence: 99%

Tensile Fatigue of Poly(Vinyl Alcohol) Hydrogels with Bio‐Friendly Toughening Agents

Koshut

Smoot

Rummel

et al. 2020

Macro Materials & Eng

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Inspired by the avoidance of toxic chemical crosslinkers and harsh reaction conditions, this work describes a poly(vinyl alcohol)‐based (PVA) double‐network (DN) hydrogel aimed at maintaining biocompatibility through the combined use of bio‐friendly additives and freezing–thawing cyclic processing for the application of synthetic soft‐polymer implants. This DN hydrogel is studied using techniques that characterize both its chemical and mechanical behavior. A variety of bio‐friendly additives are screened for their effectiveness at improving the toughness of the PVA hydrogel system in monotonic tension. Starch is selected as the best additive for further tensile testing as it brings about a near 30% increase in ultimate tensile strength and maintains ease of processing. This PVA–starch DN sample is then studied for its tensile fatigue properties through cyclic, strain‐controlled testing to develop a fatigue life curve. Though an increase in monotonic tensile strength is observed, the PVA–starch DN hydrogel does not bring about an improvement in the fatigue behavior as compared to the control. Although synthetic hydrogel reinforcement is widely researched, this work presents the first fatigue analysis of its kind and it is intended to serve as a guide for future fatigue studies of reinforced hydrogels.

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Section: Introduction Of Synthetic Hydrogelsmentioning

confidence: 99%

Tensile Fatigue of Poly(Vinyl Alcohol) Hydrogels with Bio‐Friendly Toughening Agents

Koshut

Smoot

Rummel

et al. 2020

Macro Materials & Eng

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“…According to the obtained stress-strain curves, the hydrogel compressive tangent modulus was calculated by the finite difference method at 5% and 20% strain. The equation is follows:Eε=σε+Δε−σε−Δε2Δε, Where E ε is the compressive tangent modulus of the hydrogel at the compressive strain ratio of ε. Δε is the variable of the strain, taking 2% [29]. In addition, five independent samples were tested and the average was calculated.…”

Section: Methodsmentioning

confidence: 99%

PNIPAM-MAPOSS Hybrid Hydrogels with Excellent Swelling Behavior and Enhanced Mechanical Performance: Preparation and Drug Release of 5-Fluorouracil

Xiaoman

et al. 2018

Polymers

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Poly(N-isopropylacrylamide) (PNIPAM) is a widely-studied polymers due to its excellent temperature sensitivity. PNIPAM-MAPOSS hybrid hydrogel, based on the introduction of acrylolsobutyl polyhedral oligomeric silsesquioxane (MAPOSS) into the PNIPAM matrix in the presence of polyethylene glycol, was prepared via radical polymerization. The modified hydrogels exhibited a thick, heterogeneous porous structure. PEG was used as a pore-forming agent to adjust the pore size. MAPOSS reduced the swelling ratios of gels, and decreased the LCST, causing the hydrogels to shrink at lower temperatures. However, its hydrophobicity helped to improve the temperature response rate. The incorporation of rigid MAPOSS into the polymer network greatly increased the compressive modulus of the hydrogel. It is worth noting that, by adjusting the amount of MAPOSS and PEG, the hydrogel could have both ideal mechanical properties and swelling behavior. In addition, hydrogel containing 8.33 wt % MAPOSS could achieve stable and sustained drug release. Thus, the prepared PNIPAM-MAPOSS hybrid hydrogel can serve as drug carrier for 5-fluorouracil and may have potential application in other biomedical fields.

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“…The polymer (PE or AL) blended PVA hydrogel microspheres with small amount of NaCl (0.2 wt%) have shown significant variation in degree of swelling in comparison to polymer blended hydrogel microspheres without NaCl. The presence of NaCl in PVA hydrogel microspheres has controlled the degree of swelling due to the presence of osmotic pressure (Yan et al, 2016) that allowed the transport of more amount of water in PVA hydrogel microspheres from swelling media in comparison to hydrogel microspheres without NaCl.…”

Section: Degree Of Swelling In Pva Hydrogel Microspheresmentioning

confidence: 99%

Controlled Release Behaviors of Tribenuron Methyl Herbicide and Potassium Nitrate Fertilizer from Natural Polymer Blended Poly(Vinyl Alcohol) Hydrogel Microspheres

Jabrail¹,

Jamil²,

Elsabee³

et al. 2019

American Journal of Applied Sciences

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Polyvinyl Alcohol (PVA) hydrogel microspheres for controlled release of fertilizer (KNO3) and Tribenuron Methyl Herbicide (TBM) were prepared by blending the naturally occurring Alginate (AL) and Pectin (PE). The cross-linking in PVA hydrogel microspheres was carried out by varying the amount of glutaraldehyde from 0.5-1.0 wt%. To control the loading and release properties of PVA hydrogel microspheres, a small amount of NaCl (0.2 wt%) was also added in formulation of microspheres. The blending of PE and AL in PVA hydrogel microspheres was confirmed with FT-IR spectra and by increased thermal stability PVA hydrogel as determined by Differential Scanning Calorimetry (DSC) and Thermogravimetric (TGA) analysis. The PVA hydrogel microspheres were characterized for degree of swelling and for loading and cumulative release of fertilizer (KNO3) and herbicide (TBM), which were carried out in solutions of different pH and at different temperatures. The Scanning Electron Micrographs (SEM) of PVA hydrogel microspheres were recorded before and after the release of loaded agrochemicals and used to confirm the shape and homogeneous blending of PE/AL in PVA hydrogels. The enhanced brittle morphology from SEM images of PVA hydrogel microspheres after the release of loaded agrochemicals has suggested the controlled release of agrochemicals through a mechanism of degradation of polymer chains. Thus natural polymer blended PVA hydrogel microspheres are found to be a potential candidate for the formulation of controlled release systems for the application of agrochemicals in soils and to overcome the environmental problem, which usually encountered on applications of fertilizers and herbicides in agricultural fields by conventional methods.

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Swelling, mechanical and friction properties of PVA/PVP hydrogels after swelling in osmotic pressure solution

Cited by 82 publications

References 41 publications

Tensile Fatigue of Poly(Vinyl Alcohol) Hydrogels with Bio‐Friendly Toughening Agents

Tensile Fatigue of Poly(Vinyl Alcohol) Hydrogels with Bio‐Friendly Toughening Agents

PNIPAM-MAPOSS Hybrid Hydrogels with Excellent Swelling Behavior and Enhanced Mechanical Performance: Preparation and Drug Release of 5-Fluorouracil

Controlled Release Behaviors of Tribenuron Methyl Herbicide and Potassium Nitrate Fertilizer from Natural Polymer Blended Poly(Vinyl Alcohol) Hydrogel Microspheres

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