Imvelaphi yophando
Njengobutyebi bendalo, obuguqukayo kwaye buvuseleleka, i-seluplose idibana nemiceli mngeni emikhulu kwizicelo ezenziwayo ngenxa yepropathi yayo enganyikithi kwaye incinci yokunyibilika. I-crystallies ephezulu kunye ne-hydrogen ye-hydrogen ye-hydrogen kwisimo seselselose senza ukuba ihlazeke kodwa ayinyibiliki ngexesha lenkqubo, kwaye i-insulble emanzini kunye neyona nto inyibilikayo. Izibonelelo zabo ziveliswa kukuncanywa kunye nokuthenjwa kwamaqela e-hydroxyl kwiiyunithi ze-anhhydroglucose kwikhonkco le-polymer, kwaye ziya kubonisa ezinye iipropathi ezahlukeneyo xa kuthelekiswa ne-selsulose yendalo. Impendulo yokuphendula ye-elselose inokuvelisa ii-selsulose ezininzi ezinyibilikayo zamanzi, ezinjengeMethyl Selelose (MC), i-HCDROXYYLLLLINOse (HPC), e-HPC), e-HOSTC), kwii-COSTCICS kunye namayeza. I-CO enyibilikayo yamanzi inokwakha i-hydrogen-bolymers ene-polycars enebhokisi yePolycarylicy Acids kunye nePolyphenols.
INdibano ye-Bight-Oc-Puider (LBL) yindlela esebenzayo yokulungiselela iifilimu ze-polymer. Oku kulandelayo kuchaza iNdibano ye-LBL ye-CES ezintathu ze-HEC, MC kunye ne-HPC ngePaa, ithelekisa indlela yabo yokuziphatha, kwaye ihlalutye ifuthe lendibano kwindibano ye-LBL. Phanda isiphumo se-PH kwi-fictrick ububanzi befilimu, kunye nomahluko ohlukileyo kwi-PH kwi-Informations, kunye nokuphuhlisa iipropathi zokufumana amanzi e-CE / Paa.
Izinto zovavanyo:
I-Polyacrylic Acid (PA, MW = 450,000). I-viscosity ye-2WT.% Isisombululo se-hydroxythlcelose (hec) ngama-300 i-MPAFS, kunye nenqanaba lokufaka endaweni ye-2,5. I-methylcelculose (MC, i-2wt.% Isisombululo esinamandla kunye nohlobo lwe-MPAFS kunye nenqanaba lokufakwa endaweni ye-1.8). I-HydroxyPOpyl seluplose (i-HPC, i-2wt.% Isisombululo se-MPAFTIty ye-400 MPAF kunye nenqanaba lokufakwa endaweni ye-2,5).
Ukulungiselela kwefilimu:
Ilungiselelwe yiNdibano ye-Crystal ye-slestal ye-silicon nge-25 ° C. Indlela yonyango lwe-matrix ye-Slide ilandelayo: Ithambeka kwisisombululo se-acidic (H2SO4 / HOO / i-HORME / i-PH) i-PH ingathathi hlangothi, kwaye ekugqibeleni yomile nge-hitrogen emsulwa. Indibano ye-LBL yenziwa kusetyenziswa oomatshini abazenzekelayo. Umkhuseli wawungafakwanga kwisisombululo se-EC (0.2 mg / ML) kunye nesisombululo se-PAA (0.2 mg / mg / 0.2 mg / mg / mg / mg / mg / mg / mg / ml), isisombululo ngasinye sasimanyane ngemizuzu emi-4. I-roaks ezintathu ze-rinse ye-1 min nganye kumanzi e-deoried zenziwa phakathi kwesisombululo ngasinye se-souse ukususa i-polymer eqhotyoshelweyo. Ixabiso le-PHSINOS yesisombululo sendibano kunye nesisombululo se-rinsing zalungelelaniswa ne-PH 2.0. Iifilimu ezilungiselelwe iifilimu ezixhonywe njenge (CE / Paa) N, apho n ichaza umjikelo weNdibano. (Hec / paa) 40, (MC / Paa) 30 kwaye (i-HPC / Paa) 30 yayilungiselelwe ikakhulu.
Uhlobo lwefilimu:
I-Science ekufutshane neqhelekileyo irekhodiweyo yabhalwa kwaye yahlalutywa nge-Nanocalc-XR yolwandle, kwaye ubukhulu beefilimu ezifakwe kwisilicon zalinganiswa. Nge-Silicon engenanto, i-FT-IR Spectrum yefilimu emdaka kwi-Silicon Fricetate yaqokelelwa kwi-wicolet 8700 ye-interrad spectrometer.
I-Hydrogen Bond Intsebenzo phakathi kwe-PAA kunye ne-CES:
INdibano yeHec, i-MC kunye ne-HPC nge-paa kwiifilimu ze-LBL. I-infrared ebonakalayo ye-HeC / raa, i-MC / Paa kunye ne-HPC / Paa zibonisiwe kumzobo. Imiqondiso eyomeleleyo ye-IR kunye ne-cus ingabonwa ngokucacileyo kwi-IR ovela kwi-HEC / paa, i-MC / PA kunye ne-HPC / Paa. I-FT-IR Spectuctroscopy inokuhlalutya i-Hydrogen Bop phakathi kwe-PAY kunye ne-CES ngokubeka iliso kutshintsho lweebhendi zempawu zokutshintsha. I-hydrogen boint phakathi kwe-CES kunye ne-PAA ikakhulu ikwi-heddroxyl yeoksijini ye-CES kunye neqela le-POA. Emva kokuba kwenziwe i-hydrogen bond, yolula i-shiep ebomvu kwi-peak ukuya kwisikhokelo esiphantsi.
Incopho ye-1710 cm-1 iqatshelwe umgubo ococekileyo we-paa. Xa i-polyacyrnide yahlanganisene kwifilimu enee-CES ezahlukeneyo, iincopho zehek / ipayi, i-MC / ye-MC / PM-1, 1720 cm-1, ngokwahlukeneyo. Xa kuthelekiswa nomgubo we-paa ococekileyo, ubude be-piak ye-HPC / Paa, i-MC / PAI kunye ne-Hec / iifilimu ze-HEC / i-10 ne-8 cm-1, ngokulandelelana. I-hydrogen bond phakathi kweoksijini ye-ether kwaye i-cohh iphazamisa i-hydrogen bond phakathi kwamaqela aphezulu. Okukhona iibhondi eziphezulu ze-hydrogen zenziwa phakathi kwe-PAA no-CE, enkulu yokutshintsha kwenqanaba le-CE / Paa kwi-IR kwi-I-I-IR. I-HPC inenqanaba eliphezulu le-hydrogen bod, i-PAA kunye ne-MC iphakathi, kwaye i-hec iseyeyona iphantsi.
Ukuziphatha okukhula kweefilimu ze-PAA kunye ne-CES:
Ukuziphatha kwefilimu ye-PAA kunye ne-CES ngexesha lendibano ye-LBL yaphandwa usebenzisa i-QCM kunye ne-Intanethi i-Interframetry. I-QCM iyasebenza ngokubeka iliso lokukhula kwefilimu kwi-ficles kwi-cycles yokuqala yendibano. Abasebenzi ababonakalayo balungele iifilimu ezikhule ngaphezulu kwe-10 imijikelezo.
Ifilimu yehek / paa ibonise ukukhula kwenkqubo ye-LBL, ngelixa i-MC / Paa kunye neefilimu ze-MC / ze-PAA kunye ne-HPC zibonisa ukukhula kwendibano kunye nokuguqulwa ukuba kukukhula komgca. Kwingingqi yokukhula komgca, inqanaba eliphezulu lokuntywila, kokukhula kokukhula kobunzima kumjikelo weNdibano.
Iziphumo zesisombululo se-PP ekukhuleni kwefilimu:
Ixabiso le-pH lesisombululo lichaphazela ukukhula kwe-hydrogen ye-hydrogen polymer yefilimu. Njenge-polyeleleyte ebuthathaka, i-PAA iya kuba ngu-ionsed kwaye ayihlawuliswa kakubi njengoko i-PH yesisombululo iyanda, ngokuthintela unxibelelwano lwe-hydrogen weqhina. Xa inqanaba le-I-IOIRY le-PAA ifikelele kwinqanaba elithile, i-PAA ayikwazanga ukuhlanganisa ifilimu ene-hydrogen bodprings ye-hydrogen ye-hydrogen kwi-lbl.
Ubunzima befilimu bancipha ngokunyuka kwesisombululo se-PH, kwaye ubukhulu beefilimu bancipha ngequbuliso kwi-PH2.5 HPC / Paa kunye ne-PH3.5 hpc / paa. Indawo ebalulekileyo ye-HPC / Paa imalunga ne-pH 3.5, ngelixa le-hec / paa imalunga ne-3.0. Oku kuthetha ukuba xa i-PH yoLuyiso yeNdibano ingaphezulu kwe-3.5, ifilimu ye-HPC ayinakwenziwa, kwaye xa i-PH yesisombululo ingasekwa. Ngenxa yenqanaba eliphezulu le-hydrogen ye-hpc / paa membrane, ixabiso le-PH ebaluleke kakhulu le-HPC / Paa iphezulu kune-hec / paa membrane. Kwisisombululo esingenazithulukweni, amaxabiso e-pl ebaluleke kakhulu kwe-HEC / Paa, i-MC / i-MC / Paa kunye ne-HPC / Paa yayimalunga ne-2.9, 3.2, ngokulandelelana. I-ph ye-HPC / i-PAA iphezulu kuneyona ye-hec / raa, ehambelana neyo ye-lbl membrane.
Intsebenzo yokufumana amanzi ye-CE / Paa:
I-CES ityebile kumaqela e-hydroxyl ukuze ifumane idini lamanzi elifanelekileyo kunye nokugcinwa kwamanzi. Ukuthatha i-hec / paa membrane njengomzekelo, umthamo we-hydrogen-on on on on on on on on on on on on on e-Dean ukuya kumanzi kwindawo esingqongileyo ifundwe. Iphawuleka i-Interkrametry i-Interferametry, ubukhulu befilimu buyenyuka njengoko ifilimu ifumana amanzi. Yabekwa kwindalo esingqongileyo kunye ne-suvidity eguqukayo nge-25 ° C kwiiyure ezingama-24 zokuphumeza i-acelibribribribribribribribrigum. Iifilimu zomiswe kwi-oven vacuum (40 ° C) ye-24 h ukususa umswakama.
Njengoko umswakama unyuka, ifikisi ifickins. Kwindawo ephantsi yokufuma nge-30% -50%, ukukhula kobunzima kucotha kancinci. Xa umswakama udlula kwi-50%, ubunzima bukhula ngokukhawuleza. Xa kuthelekiswa ne-pvpogen-propen ye-hydrogen / paa membrane, i-hec / pala membrane inokufumana amanzi amaninzi kwindalo esingqongileyo. Ngaphantsi kwemeko yokufuma okuhambelana ne-70% (i-25 ° C), uluhlu lokuthambisa kwe-PVPO / ifilimu ye-PVE imalunga ne-4%, ngelixa i-Hec / ifilimu ye-HEC / ye-paa iphezulu malunga ne-18%. Iziphumo zibonise ukuba nangona isixa esithile samaqela kwi-HEC System kwi-hec / paa inkqubo ithathe inxaxheba kwi-Hydrogen Bonds, bekusekho inani elithile le-OH amaqela enxibelelana namanzi kwindalo esingqongileyo. Ke ngoko, inkqubo yehek / ye-PAA ineepropathi ezintle zokufumana amanzi.
ukuququmbela
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. Xa isisombululo seP siphezulu kunendawo yayo ebaluleke kakhulu, i-Paa kunye ne-CE ayinakuhlanganisa kwifilimu. I-CE / Paa membrane yayinyibilikisi kwizisombululo ze-ph ende.
. I-Ce / Paa membrane inozinzo oluhle kwaye i-insulancy kwizisombululo ze-ph ephezulu.
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I-Post Time: Feb-18 ukuya kwi-1823