Polymer adsorption

Adsorption shine mannewar ions ko kwayoyin halitta akan saman wani lokaci. Adsorption na iya faruwa ta hanyar physisorption da chemisorption.Ions da kwayoyin halitta na iya haɗawa da nau'ikan saman sama da yawa gami da saman polymer.Polymer wani babban kwayoyin halitta ne wanda ya ƙunshi maimaita subunits da aka haɗa tare ta hanyar haɗin gwiwa.Adsorption na ions da kwayoyin halitta zuwa saman polymer suna taka rawa a aikace-aikace da yawa ciki har da: biomedical, structural, and coatings.

Polymerfilaye sun sha bamban da saman da ba na polymer ba a cikin cewa sassan da ke sama suna da alaƙa da juna.Fuskokin da ba na polymer ba za a iya ɗaure su ta hanyar haɗin gwiwar ionic, haɗin ƙarfe ko ƙarfin intermolecular (IMFs).A cikin tsarin sassa biyu, wuraren da ba na polymer ba suna samuwa lokacin da ake buƙatar adadin kuzari mai kyau don karya hulɗar kai da samar da haɗin kai.Saboda haka, makamashi na haɗuwa yana da kyau.Wannan adadin kuzari, kamar yadda aka kwatanta ta hanyar tashin hankali tsakanin fuska, ya bambanta don haɗuwa daban-daban na kayan.Koyaya, tare da filayen polymer, ƙananan abubuwan suna haɗin gwiwa tare kuma yawancin lokaci na ƙaƙƙarfan farfajiyar baya barin auna tashin hankali kai tsaye.Ƙungiyoyin intermolecular tsakanin manyan ƙwayoyin polymer suna da wuyar ƙididdige su kuma ba za a iya ƙayyade su da sauƙi kamar yadda ba tare da haɗin gwiwar kwayoyin halitta ba.[2].Ƙungiyoyin da ke da alaƙa da haɗin gwiwa suna samar da fili tare da kaddarorin daban-daban idan aka kwatanta da wuraren da ba na polymer ba.Wasu misalan filayen polymer sun haɗa da: polyvinyl chloride (PVC), nailan, polyethylene (PE), da polypropylene (PP).An yi nazarin saman yumbura ta amfani da dabaru iri-iri, da suka haɗa da: duban microscopy na electron, duban ƙananan ƙananan ƙwayoyin cuta, da infrared spectroscopy.

Filayen polymer daban-daban suna da sarƙoƙin gefe daban-daban akan monomers ɗin su waɗanda za'a iya caje su saboda talla ko rarrabawar adsorbates.Misali, polystyrene sulfonate yana da monomers mai ɗauke da sarƙoƙin gefen caja mara kyau wanda zai iya ɗaukar adsorbates masu inganci.Polystyrene sulfonate za ta ƙara haɓakar adsorbate mai inganci fiye da caje mara kyau.Akasin haka, don polymer ɗin da ya ƙunshi sarƙoƙi na gefe mai inganci, kamar poly(diallyldimethylammonium chloride), za a jawo hankalin adsorbates mara kyau.

Tsarin tsari

Nagartattun kayan aikin polymer:Ana amfani da ƙwararrun ƙwararrun polymer a cikin ƙarfafawa da gyara tsoffin sifofi.Ana iya yin waɗannan abubuwan haɓakawa na ci gaba ta amfani da hanyoyi daban-daban waɗanda suka haɗa da prepreg, resin, jiko, iska na filament da pultrusion.Ana amfani da ingantattun abubuwan haɗin gwiwar polymer a yawancin tsarin jirgin sama kuma babbar kasuwarsu tana cikin sararin samaniya da tsaro.

Fiber ƙarfafa polymers:Injiniyoyi masu ƙarfafa fiber (FRP) galibi injiniyoyi ne ke amfani da su a cikin tsarin su.FRPs suna amsa layin layi-lastically zuwa damuwa axial, yana mai da su babban abu don ɗaukar kaya.FRPs yawanci suna cikin samuwar laminate tare da kowane lamina yana da filaye na unidirectional, yawanci carbon ko gilashi, wanda aka haɗa a cikin wani Layer na kayan matrix polymer.FRPs suna da babban juriya ga bayyanar muhalli da kuma tsayin daka.

Polytetrafluoroethylene:Polytetrafluoroethylene (PTFE) polymer ne da aka yi amfani da shi a cikin aikace-aikace da yawa ciki har da kayan shafa maras sanda, kayan ado, da man shafawa.PTFE kwayoyin halitta ne na hydrophobic wanda ya hada da carbon da fluorine.Abubuwan haɗin carbon-fluorine suna haifar da PTFE ya zama abu mara ƙarfi, mai dacewa a cikin yanayin zafin jiki mai ƙarfi da juriya ga fashewar damuwa.Waɗannan kaddarorin suna sa PTFE ta zama marasa amsawa kuma ana amfani da su a cikin tsararrun aikace-aikace.

Polymer adsorption a cikin m kafofin watsa labarai:Adsorption na jiki da kuma ɗamarar inji sune manyan dalilai guda biyu na riƙewar polymer a cikin kafofin watsa labarai mara ƙarfi.Ƙananan riƙewar polymer a cikin tafki yana da mahimmanci ga nasarar aikin polymer EOR.