BAYANIN SAUKI
A matsayina na halitta, albarkatun ƙasa da kuma sabuntawa, cellulose babban ƙalubale a aikace-aikace aikace-aikace saboda ba iyaka kaddarorin. Babban lu'ulu'u mai yawa da kuma shaidar hydrogen a cikin tsarin sel mai yawa a cikin tsarin sel mai yawa a cikin tsarin sel mai lalacewa amma kada narkewa a cikin ruwa da mafi yawan abubuwan da ke cikin ruwa. Abubuwan da aka haɗa su ta hanyar haɗuwa da haɗuwa da groupationungiyoyin Hydroxyl akan raka'a na Anhydroguose, kuma za su nuna wasu kaddarorin polymer, kuma zasu nuna wasu kaddarorin polymer. Amincewa da Extor na Cellose na iya samar da yawancin sel mai narkewa ruwa mai ruwa. Ciyar da ruwa mai narkewa na iya samar da polymers-bonded polymers tare da polychoxylic acid da polyphenols.
Majalisar Layer-by-Later (LBL) hanya ce mai tasiri don shirya polymer hada kayan kwalliya. Mai zuwa ya fi bayanin babban taron LBL na CES uku daban-daban na HEC, MC da HPC tare da Xa, kwatanta halayensu na Majalisarsu, kuma suna yin nazarin rinjayar masu maye a taron LBL. Binciken tasirin pH akan kauri mai kauri, da bambance-bambance daban-daban na PH akan samuwar fim da rushewa da rushewar ruwa CE / PAA.
Kayan gwaji:
Polyackrylic acid (PAA, MW = 450,000). Dankokin 2wt.% Magani bayani na hydroxyethylcelcelcelcelylcelcelcelcelcellullylellulose (hec) shine 300 mpa, da kuma matsayin canzawa shine 2.5. Methylcellulose (MC, a 2WT.% Bayani tare da danko 400 MPALE da kuma matsayin musanyawa 1.8). Slell Cellulose (HPC, a 2WT) mafita tare da danko 400 MPAG da kuma matsayin musanya na 2.5).
Shiri na Fim:
An shirya shi da ruwa Crystal Layer Layer Layer Layer Layer Counter Layer a Silicon a 25 ° C. Hanyar kulawa da matride matrix kamar haka: Jiƙa a cikin maganin acidic (H2SO4 / H2O2, sannan a matso tare da ruwa mai tsayi sau da yawa har sai da phy, a matso da vol), kuma a ƙarshe bushe da tsarkakakken nitrogen. Ana yin taro na LBL ta amfani da injunan atomatik. Substrate ya kasance madadin soaked a cikin bayani (0.2 MG / ML / ML) da bayani na PAa (0.2 MG / ml), kowace mafita da aka soaked don min 4 min. Kwana uku na guda 1 min kowannensu a cikin ruwa na deionized an yi su tsakanin kowane bayani jiƙa don cire polymer wanda aka haɗe. Dabi'un PH na PH na Majalisar Ilmi da kuma maganin Rins sun daidaita zuwa PH 2.0. An nuna fina-finai na As -ed da aka shirya a matsayin (CE / PAA) N, inda N nuna alamar zagayowar Majalisar. (HEC / PAA) 40, (MC / Paa) 30 da (HPC / PAA) 30 aka shirya musamman.
Bayanin fim:
Na kusa-al'ada jerin abubuwan tunani da aka rubuta kuma an yi nazari tare da Nanocalc-Xr Oficts da aka ajiye akan silicon da aka auna. Tare da blank silicon substrate kamar baya, ft-Ir-werectrum na bakin ciki fim a kan silicon subrate an tattara a kan wani nicolet 8700 infrared spectrometer.
Cikakkun haɗin gwiwar Hydrogen tsakanin Paa da CES:
Majalisar HEC, MC da HPC tare da Paa cikin fina-finai na LBL. Spectra mai dauke da HEC / Paa, MC / Paa da HPC / Paa an nuna a cikin adadi. Alamar INR INL da CES za a iya lura da su a fili a cikin Hec / Paa, MC / Paa da HPC / Paa. FT-Irsroscopy na iya yin nazari kan hadaddun hadadden Hydrogen tsakanin PAA da CES ta hanyar lura da canjin shatsun halaye. Hydrogen haɗin gwiwar tsakanin CES da Faa musamman yakan faru ne tsakanin hydroxyl oxygen na ces da kuma COOH rukuni na Paa. Bayan an samar da haɗin hydrogen, ƙwanƙwasa ko ganiya mai shimfiɗa ta jujjuya ƙananan mitar.
An lura da ganiya na 1710 cm-1 1 an lura don tsarkakakken Paa foda. A lokacin da polyacklemaide aka tattara cikin fina-finai tare da ces daban-daban, kololuwan paa, MC-1, 1720 cm-1 da 1724 cm-1 da 1724 cm-1, bi da cm-1 da 1724 cm-1, bi da cm-1, bi da cm-1. Idan aka kwatanta da tsarkakakken foda, tsayi tsawon HPC / Paa, fina-finai na HC / Paa da aka yi da 14, 10 da 8 cm-1, bi da bi. Hydrogen Hydrogen tsakanin Ether Oxygen da Cooh ya katse haɗin gwiwar hydrogen tsakanin ƙungiyoyin COoh. A mafi kyawun shaidu na hydrogen kafa tsakanin PA da CE, mafi girma isasshen motsi na CE / PAA a cikin macen masarauta. HPC tana da mafi girman matakin hadaddun hydrogen, da kuma MC suna tsakiyar, kuma HC ne mafi ƙasƙanci.
Halayen girma na fina-finai da kuma ces:
Halayyar samar da fim ɗin da keɓawa a lokacin sarautar LBL da aka bincika ta amfani da QCM da Spectrerometry. QCM yana da tasiri don saka idanu na fim a cikin gida a cikin kitse na farko cewa masu canjin taro. Spectral Interfermers ya dace da finas girma sama da 10 hawan 10.
Fim na HEC / Paa ya nuna ci gaban layi a cikin LBL Majalisar Dinkin Duniya, yayin da fina-finai na HPC / Paa da HPC / Paa sun nuna ci gaba a farkon matakan taro sannan ya canza zuwa ci gaba mai kyau. A cikin kewayon haɓaka yankin, mafi girman digiri na hadaddun, mafi girma girma girma girma kowace taro zagaye.
Tasirin Magani a kan girma fim:
Darajar pH ta ƙira ta shafi ci gaban hydrogen ta ɗaure fim ɗin composite. A matsayin mai rauni polyelelectroolyte, Paa za ta zama ionized da kuma ba da izinin caji kamar yadda ph mafita yana ƙaruwa, da kuma hana ƙungiyar haɗin Hydrogen. Lokacin da digiri na ionization na Pionization na Paa ya kai wani matakin, Paa ba zai iya tara kashi tare da karɓar kayan haɗin hydrogen a LBL ba.
A cikin raha na kauri ya ragu tare da karuwa na Magani, da kuma raha na kauri ya ragu ba zato ba tsammani a PH2.5 HPC / PAA da PH3.0 HPC / PAA. Mahimmin matsayi na HPC / Paa shine game da PH 3.5, yayin da HEC / Paa kusan 3.0. Wannan yana nufin cewa lokacin da PH na Majalisar ya samo ya fi 3.5, fim ɗin HPC / PAA ba za a iya samar da fim ɗin 3.0 ba. Saboda mafi girman digiri na hadaddun hadaddun HPC / Paa Membrane, mahimmancin darajar ph na membrane na HPC / Paa Membrane ya fi na membrane na HEC / Paa Membrane. A cikin mafita-kyauta bayani, mawuyacin hali na phawasukan da HEC / Paa, MC / Paa da HPC / XC / Paa sun kasance kusan 2.9, 3.2 da 3.7, bi da bi. Mahimmancin PH na HPC / Paa ya fi na HEC / XA, wanda ya yi daidai da wannan na membrane LBL membrane.
Ruwa na shan shaye shaye na CE / PA Membrane:
CES yana da arziki a cikin Hydroxyl ƙungiyoyi domin yana da kyakkyawan ruwa ruwa da riƙe ruwa. Daukar membrane HEC / Paa Membrane a matsayin misali, damar damar adsorption na Hydrogen-Bonded CE / Pa Membrane zuwa ruwa a cikin muhalli ya yi nazari. Halin da aka kirkira ta hanyar masu zaman kansa, mai kauri mai kauri yana ƙaruwa azaman fim ɗin ya sha ruwa. An sanya shi a cikin wani yanayi tare da zafi mai daidaitacce a 25 ° C na 24 hours don cimma daidaituwar ruwa na ruwa. A fina-finai sun bushe a cikin wani wuri mai santsi (40 ° C) na 24 in cire danshi.
Kamar yadda zafi yana ƙaruwa, fim yayi kuri'un. A cikin ƙarancin zafi yanki na 30% -50%, da kauri girma yana da jinkirin. Lokacin da zafi ya wuce 50%, kauri ya yi girma cikin sauri. Idan aka kwatanta da hydrogen-bonded pvpon / Paa Membrane, da HEC / Paa Membrane na iya ɗaukar ƙarin ruwa daga muhalli. A karkashin yanayin dangi na 70% (25 ° C), fim na Thickening shine kusan 4%, yayin da fim ɗin Hec / Paa yana da girma kamar 18%. Sakamakon da ya nuna cewa ko da yake wani adadin oh a cikin tsarin OH da aka halarci a cikin samuwar hydrogen ya yi hulɗa da ruwa a cikin muhalli. Saboda haka, tsarin HEC / Paa yana da kaddarorin sha na ruwa.
A ƙarshe
(1) tsarin HPC / Paa tare da mafi girman darajar Hydrogen tare da Fasaha na Hydrogen na CE da Paa suna da ci gaba mafi sauri a cikinsu, MC / Paa tana tsakiyar, da HEC / Paa ita ce mafi ƙasƙanci.
(2) fim na HEC / Paa ya nuna yanayin haɓaka na layi a cikin tsarin shiri, yayin da sauran fina-finai biyu MC / Paa da HPC / Paa sun nuna haɓaka haɓaka 'yan shekarun farko, sannan kuma suka canza shi zuwa yanayin haɓaka na farko.
(3) Biyawar fim na CE / Paa tana da ƙarfin dogaro akan mafita ph. Lokacin da mafita ph ya fi na mahimmancin magana, XA ta yi ba zai iya taru cikin fim ba. The Toldambled CE / PA Membrane ya kasance mai narkewa a cikin mafita na PH.
(4) Tun da fim ɗin CE / Paa yana da arziki a cikin oh da cooh, magani mai zafi ya sa ya tsallake. A Coss-da aka haɗa CE / Paa Membrane yana da kyakkyawar kwanciyar hankali kuma yana da banƙantar ƙasa a cikin mafita na PH.
(5) Filin CE / PAA yana da damar adsorption don ruwa a cikin muhalli.
Lokaci: Feb-18-2023