Tsvaga kumashure
Sechisimba, chakawanda uye chakawedzerwa uye chinosangana, cellulose inosangana nematambudziko makuru mune zvinoshanda zvinoshandiswa nekuda kwekunyungudika kwayo kusiri-chinyungudika uye kushoma solubility zvinhu. Iyo Yakakwirira Crystallinity uye yakakwira-density hydrogen zvisungo muCellulose chimiro chinoita kuti isanyunguduke asi isinganyungudhi panguva yekuita, uye kusunganidzwa mumvura uye yakawanda organic sol sol. Mahosi avo anogadzirwa nekutsamwa uye itstrofication yemapoka eHydroxyl pane iyo Anhydroglucose zvikamu muPolymer Chain, uye icharatidza zvimwe zvinhu zvakasiyana kana zvichienzaniswa nemusikirwo cellulose. Iyo yekutsika yekuchinja kwemasero inogona kuunza yakawanda-methyl cellulose Cellulose Cellulose Cellulose Water-solule CE inogona kuumba hydrogen-bold polymers ine polyarboxylic acids uye polyphenols.
Layer-na-lact gusisiki (lbl) ndiyo nzira inoshanda yekugadzirira polymer composite mafirimu akaonda. Izvi zvinotevera zvinonyatsotsanangura maLBL musangano wemakiromita matatu akasiyana ehec, mc uye hpc nePAA, inofananidza maitiro avo egungano, uye inoongorora pesvedzero yevatsidzi pagungano reLBL. Fungidzira mhedzisiro yePH mudenga refirimu, uye kusiyana kwakasiyana kwePH pane firimu kuumbwa uye kupaza, uye kukudziridza mvura yekunyora yeCE / PAA.
Zvigadzirwa zvekuedza:
Polwandacrylic acid (Paa, MW = 450,000). Iyo viscosity ye 2wt MetHylcellulose (MC, A 2WT.% Mhedzisiro Mhinduro yeiyo viscosity ye400 mpa · ercution uye degree rekutsiva kwe1.8). Hydroxyprusyl Cellulose (HPC, A 2WT.% Mhedzisiro Mhinduro yeiyo viscosity ye400 mpain uye degree rekutsiva kwe2,5).
Kugadzirira kwefirimu:
Yakagadzirirwa neyemagetsi cry guyer kusangana neSilicon pa 25 ° C. Nzira yekurapa yeiyo slide matsrix iri seyinotevera: SOAK mune Acsic Solution (H2So4 / 0 / 3VO2, Gungano reLBL rinoitwa uchishandisa otomatiki michina. Substrate yaingove yakasimudzwa mune CE SECE Solution (0.2 MG / ML) uye PAA Solution (0.2 MG / ML), mhinduro imwe neimwe yakanyudzwa ye4 min. Matatu eSinse SOKS ye1 min mumwe neumwe muDhionized Mvura akaitwa pakati pekugadzirisa kwega kwega kuti abvise polymer yakasununguka. Iyo pH tsika yemhinduro yeungano uye mhinduro yekukanda yakanga yakagadziriswa kuna Ph 2.0. Iyo-yakagadzirirwa mafirimu anonzi (CE / PAA) n, uko kunoreva kutenderera kwegungano. (HEC / PAA) 40, (MC / PAA) 30 uye (HPC / Paa) 30 yainyanya kugadzirirwa.
Firimu rehunhu:
Pedyo-zvakajairika kuratidzira spectra zvakanyorwa uye kuongororwa neNanocalc-xr Ocean Optics, uye ukobvu kwemafirimu akaiswa paSilicon akayerwa. Nechisimba chisina chinhu silicon substrate semashure, iyo ft-ir spectrum yefirimu rakatetepa pane silicon substrate yakaunganidzwa pane nicoet 8700 infrared spectrometer.
Hydrogen Chisungo chekuita pakati pePAA uye CES:
Ungano yeHec, mc uye hpc ine paa muLBL mafirimu. Iyo Infrared Spectra yeHEC / PAA, MC / PAA uye HPC / Paa inoratidzwa mumufananidzo. Iyo yakasimba IR Signals yePAA uye CES inogona kucherechedzwa zvakajeka muIr spectra yeHEC / Paa, PAA uye HPC / Paa. Ft-Ir Spectroscopy inogona kuongorora iyo hydrogen bond kuoma pakati pePaa uye ces nekutarisa kuchinjika kwehunhu hwehukama hwehukama. Iyo hydrogen kusungwa pakati peCES uye PAA inonyanya kuitika pakati peiyo hydroxyl okisijeni ye ces uye cooh boka rePAA. Mushure meiyo hydrogen chisungo chakaumbwa, iyo inotambanudza nzvimbo dzakatsvuka dzinochinja kune yakaderera frequency kutungamira.
Peak ye 1710 cm-1 yakacherechedzwa kune yakachena Paa poda. Pollyacrylamide payakaunganidzwa mumafirimu ane maCes akasiyana, Peaks yeHec / Paa, Paa Films aive Achiwanikwa pa 1718 cm-1 na 17 uye 1724 cm-1, zvichiteerana. Kuenzaniswa nePuchen Poda PoWoD, Peak Hups yeHPC / Paa, PAA / PAA uye HEC / Paa mafirimu akashandurwa na14, 10 ne8 cm-1, zvichiteerana. Iyo hydrogen bond pakati pe okisijeni ye authgeny uye cooh inopindira chisungo che hydrogen pakati pecohoo mapoka. Iyo yakawanda mahydrogen zvisungo zvakaumbwa pakati pePaa uye CE, iyo yepamusoro yepamusoro shuwa yeCE / PAA muI Ir Spectra. HPC ine degree repamusoro reHydrogen Bond kuoma, Paa uye MC ari pakati, uye hec ndiyo yakaderera.
Maitiro ekukura emafirimu ekubatanidza ePAA uye CES:
Mafirimu-ekuumba maitiro ePAA uye CES Munguva yeLBL Gungano yakafemerwa uchishandisa QCM uye Spectral Inprometry. QCM inoshanda yekuongorora yemafirimu yekukura muiyo panguva yekutanga kusangano kusangano. Spectral interferometer yakakodzera mafirimu akakura pamusoro pegumi majee.
Iyo HEC / PAA FLIVE YAKAITWA ALECARD Kukura muLBL Assembly Systems, nepo MC / PAA uye HPC / Paa mafirimu akazoratidza kuwanda kwematanho egungano uye akabva ashandurwa kuita mutsara wekukura. Mumutsara wekukura dunhu, iyo yakakwira iyo degree rekunyanyisa, yakakura kukura kwekukura kwekutenderera kwegungano.
Mhedzisiro yeSolution pH pakukura kwemafirimu:
Iyo pH Kukosha kweiyo mhinduro inobata kukura kweiyo hydrogen yakasungirirwa polymer composite firimu. Semunhu asina kusimba polyelelelecttete, Paa achazadzwa uye akashata akapomerwa sePH yemhinduro inowedzera, saka inhibiting hydrogen bond association. Kana dhigirii reIonization yePAA yasvika pane imwe nhanho, Paa haina kukwanisa kuungana mufirimu neHydrogen Bond acceneptors muLBL.
Iyo kirimu kirimu yakadzikira nekuwedzera kweSolution pH, uye gobvu yefirimu yakadzikira kamwe kamwe paPHPC / PAA uye PH3.0-3.5 HPC / Paa. Iyo inonetsa iyo HPC / PAA iri pamusoro pH 3.5, neiyo yehish / paa inenge 3.0. Izvi zvinoreva kuti apo iyo pH yemhinduro yegungano yakakwira kupfuura 35, iyo HPC / Paa film isingakwanise kuumbwa, uye kana iyo pH yemhinduro yakakwira kupfuura 3.0, iyo HEC / PAA FLIVEL haigone kuumbwa. Nekuda kweiyo yakakwirira mwero weHydrogen Bond kuoma kweHPC / Paa membrane, iyo iyo ph kukosha kweHPC / Paa membrane yakakwira kupfuura iyo yehec / paa membrane. Mumunyu-emahara mhinduro, iyo inokatyamadza phengo yemunyu matainiki yakaumbwa neHEC / PAA, PAA, PAA uye HPC / Paa yaive pa2,9, 3.2 uye zvichiteerana. Iyo yakaoma pH yeHPC / Paa yakakwira kupfuura iyo yehec / Paa, inoenderana neiyo yeLBL membrane.
Mvura inobata basa reCE / Paa membrane:
Ces yakapfuma mumapoka ehydroxyl kuitira kuti ive nemvura yakanaka yemvura uye nekuchengetwa kwemvura. Kutora HEC / Paa membrane semuenzaniso, iyo adsorption kugona kwe hydrogen-yakasungwa CE / PAA GEMENGE kumvura munzvimbo dzakadzidzwa. Inoratidzwa nekupindira kwekupindira, iyo firimu ukobvu inowedzera sezvo iyo firimu rinotora mvura. Yakaiswa munharaunda ine humidiki inogadziriswa pa25 ° C kwemaawa makumi maviri nemana kuti uwane mvura yekunyora kuenzana. Mafirimu akaomeswa mune vacuum oven (40 ° C) ye 24 h kuti ubvise zvachose kunyorova.
Sezvo humbozha hunowedzera, iyo firimu inokwenenzvera. Mune yakadzika nzvimbo yekuzvininipisa ye30% -50%, kukura kwakakora kwakanonoka. Kana iyo humidity inodarika 50%, ukobvu kunowedzera nekukurumidza. Kuenzaniswa neHydrogen-Bold PVPON / Paa membrane, iyo HEC / Paa membrane inogona kutora imwe mvura kubva kune zvakatipoteredza kubva munharaunda. Pasi pemamiriro ekunyorova kwehukama hwe70% (25 ° C), iyo yakasarudzika yePVPON / PAA FILUM ndeye 4%, neaya firimu yakakwira seanenge 18%. Mhedzisiro yacho yakaratidza kuti kunyangwe imwe huwandu hwemapoka eOC / PAA Sistimu yakatorwa neHydrogen zvisungo, paikachine nhamba inofungidzirwa yemapoka anofambidzana nemvura mumvura. Naizvozvo, iyo hec / paa system ine yakanaka mvura yekunyora zvinhu.
mumhedziso
(1.
(2.
. Kana mhinduro iyo pH yakakwira kupfuura iyo yakaoma pfungwa, Paa uye CE haigone kuungana mufirimu. Iyo yakaungana CE / Paa membrane yainyanya kuderera mune yakakwirira pH Solutions.
. Iyo Cross-Yakabatanidzwa CE / Paa membrane ine yakanaka kugadzikana uye haina kujekesa mune yakakwirira pH Solutions.
(5) CE / PAA Firimu ine yakanaka adsorption yekugona kwemvura mumamiriro ekunze.
Post Nguva: Kukadzi-18-2023