Exploring the Role of Nanoparticles in Enhancing Mechanical Properties of Hydrogel Nanocomposites

We investigate whether nanoparticle-mediated enhancements in polymer mechanical properties extend to hydrogel nanocomposites

Josergio Zaragoza

2018

Scholarcy highlights

  • Hydrogels have recently emerged as potential candidates for various biomedical and biotechnological applications owing to their unique physical and biochemical properties
  • We investigate whether nanoparticle-mediated enhancements in polymer mechanical properties extend to hydrogel nanocomposites
  • When elastic modulus is plotted against the concentration of Bis, the hydrogel elastic modulus initially increases with crosslinker concentration for all concentrations of the monomer
  • We show elastic modulus as a function of %CBis, relative concentration of the crosslinker Bis, which is defined by Equation:
  • DiTschuissssitoundy sought to examine the contributions of nanoparticle-mediated physical crosslinking to the elastic modulus of chemically crosslinked hydrogels, using pAAm-Silica nanoparticlesi.tNbn.hfdToioHPeneorp-naocmecatsowoiiriteomntthediynficevbilrr(aeoeiimntBr.-fee,meidB.std,wh-eitcsedohecr-orrieeaaoosxSsntsbsieiulssdNsditlmneeiPSnrknevi-koiNcnmneifehndgPecoag,d-rfnamsoiduanacseetgse‘edmglungidilnpseaoeisekptntbtneyieiatndnhsrl(g’gaicbls.nidretaemhco.eth,eeusniamtstreshvlaixiteeetntoiniiskeostdttssuinehni,nmfaepwgfcceo,ehgeroiseianofiuenniftvgnc,ttaerlgrsbyoodseeisdasynttsttuoohuliincenrrnteolgadhkadutsoiittgnotahhsihnngeeec addendsitiitoiensaal cshoiuervceedotfhprhouysgihcaelitchroerssclhinekminicga—l apnAdApmhyfsuicnacltmioneaanlisz)e.dTowcitohnhfiyrmdrothpeheoxbiisctesnidcee ogfroau‘gplsotbhaalt’ lseaatdurtaotiionncrpeaosiendt, pboelyyomnedr–tpheol‘ylomcearl’insateturarcattiioonns baet healevviaotresdotbesmerpveerdatuforrese.itThheerseBiesx-poerriSmiNenPt-smreevdeiaatleedd aenttheannucaetmedenetnsh, awneceinmtreondtsucmededainataedddbityionnaanl ospouarrtciecloefs paht ytseimcaplecrraotsusrleinsk>inLgC—STp,AcAonmsifsutenncttiwonitahliztehde hwyipthothhyesdirsotphhatosbaictusraidtieongrinouthpes otvheartalllecardostsolininkcinregadseednsiptyolcyamneler–apdotloymupepreirnltiemraitcstiionnesnhaatnecleemvaetnetds witnttcbtnrreeaoeaaemmntrmddwrbppliiooeotTTtoeeiwiadrooororrrdkuaanenobbttsldatawuuu,oeellrrfsttelruaeetetdeareeissspielrcr.snl>pitheonTufoLeusionfhenrCsneorsvoedclxSdriesnelecpmTeeedmserlra,saimeslctrteteihtsxonanneaarpnnietnrnontdedsnhmtduireeesigftondmtmrhtrhedhoheefneoeametsrntdhloounswteomebcl,smtlebssiassrtemusmo,dhefrecrrdvveoreohtsnheiveurmtaeacdteeicsollsdhcaheonrilssdnyouairsompalsroimaefscsolstpienootttcpleuhasdfepooniednumnlfiofusioylaiellauppsnmylsnetslam.taeoreehranWdprteeacoiarffthcehnfpirlsnelniiaetlaealciaehnservcttnr.autoslewieo,ncrcdsejcaoeclaefottemomfoihsmmeonbrpmcnoopsetotensunihiosnn,rtgseivsgttithejthehhaemtetmheyashsyedeoylehmdosirvsnytaoritieeaeyddengrmt,amrdgaeearollsdisnltgreitcedgp.rur.bctadoCCleiourcfdteeeltrlwsaniurera,ctttsscelliaawuientetiiaasnnnsygetl., elastic modulus and SiNP concentration for concentrations less than 3%, we observe saturation behavior at higher concentrations irrespective of monomer concentration
  • As indicated in previous studies, non-covalent interactions between silica nanoparticles and polyacrylamide can serve to increase the number of effective crosslinks in the network and thereby lead to increases in elastic modulus, consistent with Flory’s theory
  • Data shown are the mean of triplicate measurements ± standard deviation and have been repeated at least three times with similar results; Figure S3: Relative elastic moduli of 2.5% pAAm, 5% pAAm, and 10% pAAm hydrogels prepared using %CBis = 1.23 as a function of relative nanoparticle concentration

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