Mokhoa oa ho Fumana Matla a Gel ea Cellulose Ether

Ho lekanya matla aselulose ether gel, sehlooho sena se hlahisa hore le hoja gel ea cellulose ether le li-profile tse kang li-jelly li na le mekhoa e sa tšoaneng ea gelation, li ka sebelisa ho tšoana ka ponahalo, ke hore, li ke ke tsa phalla ka mor'a gelation Boemong bo tiileng, mokhoa o tloaelehileng oa ho shebella, Ho sebelisoa mokhoa oa ho potoloha le mokhoa oa ho lekola matla a jelly ho lekola matla a cellulose ether gel, 'me ho eketsoa mokhoa o mocha oa khatello e matla.Ho sebetsa ha mekhoa ena e mene ho fumana matla a selulose ether gel ho ile ha hlahlojoa ka liteko.Liphello li bontša hore mokhoa oa ho shebella o ka hlahloba ka mokhoa o nepahetseng matla a cellulose ether, mokhoa oa ho potoloha ha o tšoanelehe ho hlahloba matla a cellulose ether, mokhoa oa vacuum o ka hlahloba feela matla a cellulose ether ka matla a ka tlase ho 0,1 MPa, le khatello e sa tsoa eketsoa e ntle Mokhoa ona o ka lekola ka bongata matla a cellulose ether gel.

Mantsoe a bohlokoa: jelly;selulose ether gel;matla;mokhoa

0.Selelekela

Lisebelisoa tsa taolo ea profil e thehiloeng ho jelly ea polymer li sebelisoa haholo ho plugging metsi sebakeng sa oli le taolong ea profil.Leha ho le joalo, lilemong tsa morao tjena, tsamaiso ea gel cellulose ether plugging le taolo e sa utloeleng mocheso le e fetolehang habonolo e se e fetohile sebaka sa ho etsa lipatlisiso bakeng sa ho phunya metsi le taolo ea boemo bo botle matamong a oli a boima..Matla a gel ea cellulose ether ke e 'ngoe ea matšoao a bohlokoa ka ho fetisisa bakeng sa ho kenya li-plug, empa ha ho na mokhoa o ts'oanang oa mokhoa oa ho hlahloba matla.Mekhoa e tloaelehileng e sebelisoang ho hlahloba matla a jelly, joalo ka mokhoa oa ho shebella - mokhoa o tobileng le oa moruo oa ho hlahloba matla a jelly, sebelisa tafole ea khoutu ea matla a jelly ho ahlola boemo ba matla a gel a lokelang ho lekanyetsoa;mokhoa oa ho potoloha - lisebelisoa tse sebelisoang hangata ke Brookfield viscometer le rheometer, mocheso oa sampole ea tlhahlobo ea viscometer ea Brookfield e lekantsoe ka har'a 90.°C;mokhoa oa ho phunyeletsa - ha moea o sebelisoa ho phunyeletsa gel, palo e kholo ea tekanyo ea khatello e emela matla a gel.Mokhoa oa gelling oa jelly ke ho eketsa motsoako o kopanyang tharollo ea polymer.Moemeli oa sefapano le ketane ea polymer li kopantsoe ke litlamo tsa lik'hemik'hale ho theha mohaho oa marang-rang oa sebaka, 'me karolo ea mokelikeli e phuthetsoe ho eona, e le hore tsamaiso eohle e lahleheloe ke metsi, ebe e fetola Bakeng sa jelly, ts'ebetso ena ha e fetohe hape. ke phetoho ea lik'hemik'hale.Mokhoa oa gel oa cellulose ether ke hore mocheso o tlase, li-macromolecules tsa cellulose ether li pota-potiloe ke limolek'hule tse nyenyane tsa metsi ka li-bond tsa hydrogen ho etsa tharollo ea metsi.Ha mocheso oa tharollo o ntse o phahama, maqhama a hydrogen a senngoa, 'me limolek'hule tse kholo tsa cellulose ether Boemo boo limolek'hule li kopanang ho tsona ka ho sebelisana ha lihlopha tsa hydrophobic ho etsa gel ke phetoho ea' mele.Le hoja mochine oa gelation oa bobeli o fapane, ponahalo e na le boemo bo tšoanang, ke hore, boemo bo sa sisinyeheng bo tiileng bo thehoa sebakeng sa mahlakore a mararo.Hore na mokhoa oa tlhahlobo ea matla a jelly o loketse ho lekola matla a cellulose ether gel e hloka ho hlahlojoa le ho netefatsoa ka liteko.Leqepheng lena, ho sebelisoa mekhoa e meraro ea setso ho lekola matla a li-gel tsa ether tsa cellulose: mokhoa oa ho shebella, mokhoa oa ho potoloha le mokhoa oa ho hlapa, 'me mokhoa o motle oa khatello o thehiloe motheong ona.

1. Karolo ea liteko

1.1 Lisebelisoa le lisebelisoa tsa mantlha tsa liteko

Motlakase o sa khaotseng oa mocheso oa metsi oa ho hlapa metsi, DZKW-S-6, Beijing Yongguangming Medical Instrument Co., Ltd.;mocheso o phahameng le khatello e phahameng ea rheometer, MARS-III, Jeremane HAAKE khampani;ho potoloha pompo ea vacuum ea merero e mengata ea metsi, SHB-III, Gongyi Red Instrument Equipment Co., Ltd.;kutlo, DP1701-EL1D1G, Baoji Best Control Technology Co., Ltd.;tsamaiso ea ho fumana khatello, Shandong Zhongshi Dashiyi Technology Co., Ltd.;colorimetric tube, 100 mL, Tianjin Tianke Glass Instrument Manufacturing Co., Ltd.;botlolo ea khalase e hanyetsanang le mocheso o phahameng , 120 mL, Schott Glass Works, Jeremane;naetrojene e hloekileng haholo, Tianjin Gaochuang Baolan Gas Co., Ltd.

1.2 Mehlala ea liteko le boitokisetso

Hydroxypropyl methylcellulose ether, 60RT400, Taian Ruitai Cellulose Co., Ltd.;qhala 2g, 3g le 4g ​​ea hydroxypropylmethylcellulose ether ka 50 mL metsi a chesang ka 80℃, kopanya hantle 'me u kenye 25℃ea metsi a batang a 50 ml, lisampole li ile tsa qhibiliha ka ho feletseng ho etsa litharollo tsa cellulose ether tse nang le metsoako ea 0.02g/mL, 0.03g/mL le 0.04g/mL ka ho latellana.

1.3 Mokhoa oa liteko oa tlhahlobo ea matla a gel ea cellulose ether

(1) E lekoa ka mokhoa oa ho shebella.Bokhoni ba libotlolo tsa khalase tse sa keneleng mocheso o phahameng oa molomo o pharaletseng tse sebelisitsoeng tekong ke 120mL, 'me bophahamo ba tharollo ea cellulose ether ke 50mL.Kenya litharollo tse lokisitsoeng tsa cellulose ether tse nang le likhakanyo tsa 0.02g/mL, 0.03g/mL le 0.04g/mL ka botlolong ea khalase e hanyetsanang le mocheso o phahameng, e fetole ka mocheso o fapaneng, 'me u bapise likarolo tse tharo tse ka holimo tse fapaneng ho latela khoutu ea matla ea gel. Matla a gelling a selulose ether aqueous solution a ile a lekoa.

(2) E lekoa ka mokhoa oa ho potoloha.Sesebelisoa sa teko se sebelisitsoeng tekong ena ke rheometer e phahameng ea mocheso le khatello e phahameng.The cellulose ether aqueous solution e nang le motsoako oa 2% e khethoa ebe e kenngoa ka moqomong bakeng sa tlhahlobo.Sekhahla sa ho futhumatsa ke 5℃/ 10 min, sekhahla sa ho kuta ke 50 s-1, 'me nako ea teko ke 1 min., mocheso oa mocheso ke 40～110℃.

(3) E lekoa ka mokhoa o hlakileng oa vacuum.Hokela li-tubes tsa colorimetric tse nang le gel, bula pompo ea vacuum, 'me u bale palo e kholo ea tekanyo ea tekanyo ea khatello ha moea o phunyeletsa gel.Mohlala o mong le o mong o sebetsoa ka makhetlo a mararo ho fumana boleng bo tloaelehileng.

(4) Leka ka mokhoa o motle oa khatello.Ho latela molao-motheo oa mokhoa oa katleho oa "vacuum vacuum degree", re ntlafalitse mokhoa ona oa liteko mme ra amohela mokhoa oa ho ba le khatello e ntle.Hokela li-tubes tsa colorimetric tse nang le gel, 'me u sebelise mokhoa oa ho fumana khatello ho leka matla a cellulose ether gel.Palo ea gel e sebelisitsoeng tekong ke 50mL, matla a tube ea colorimetric ke 100mL, bophara bo ka hare ke 3cm, bophara bo ka hare ba tube e chitja e kentsoeng ka gel ke 1cm, 'me botebo ba ho kenya ke 3cm.Butle-butle bulela switch ea cylinder ea naetrojene.Ha data e bonts'itsoeng ea khatello e theoha ka tšohanyetso le ka matla, nka ntlha e phahameng ka ho fetisisa e le boleng ba matla bo hlokahalang ho phunyeletsa gel.Mohlala o mong le o mong o sebetsoa ka makhetlo a mararo ho fumana boleng bo tloaelehileng.

2. Liphetho tsa liteko le lipuisano

2.1 Ho sebetsa ha mokhoa oa ho shebella ho leka matla a gel a cellulose ether

Ka lebaka la ho hlahloba matla a gel ea cellulose ether ka ho shebella, ho nka tharollo ea cellulose ether ka motsoako oa 0.02 g / mL e le mohlala, ho ka tsejoa hore matla a matla ke A ha mocheso o le 65.°C, 'me matla a qala ho eketseha ha mocheso o ntse o eketseha, ha mocheso o fihla ho 75℃, e hlahisa boemo ba gel, boemo ba matla bo fetoha ho tloha ho B ho ea ho D, 'me ha mocheso o nyolohela ho 120.℃, tekanyo ea matla e fetoha F. Ho ka bonoa hore sephetho sa tlhahlobo ea mokhoa ona oa ho hlahloba se bontša feela boemo ba matla a gel, empa ha se khone ho sebelisa boitsebiso ho hlalosa matla a itseng a gel, ke hore, ke boleng empa e se. bongata.Molemo oa mokhoa ona ke hore ts'ebetso e bonolo ebile e utloahala, 'me gel e nang le matla a hlokahalang e ka hlahlojoa ka theko e tlaase ka mokhoa ona.

2.2 Ho sebetsa ha mokhoa oa ho potoloha ho leka matla a gel ea cellulose ether

Ha tharollo e futhumetse ho 80°C, viscosity ea tharollo ke 61 mPa·s, joale viscosity e eketseha ka potlako, 'me e fihla boleng bo phahameng ba 46 790 mPa.·s ho 100°C, ebe matla a fokotseha.Sena ha se lumellane le ketsahalo e kileng ea bonoa ea hore viscosity ea hydroxypropyl methylcellulose ether aqueous solution e qala ho eketseha ho 65.°C, 'me li-gel li hlaha hoo e ka bang 75°C mme matla a ntse a eketseha.Lebaka la ketsahalo ena ke hore gel e robehile ka lebaka la ho potoloha ha rotor ha ho lekoa matla a gel ea cellulose ether, e leng se hlahisang lintlha tse fosahetseng tsa matla a gel ka mocheso o latelang.Ka hona, mokhoa ona ha o loketse ho hlahloba matla a li-gel tsa cellulose ether.

2.3 Ts'ebeliso ea mokhoa oa "vacuum" oa katleho ho leka matla a gel ea cellulose ether

Liphetho tsa liteko tsa matla a gel ea cellulose ether li ile tsa hlahlobjoa ka mokhoa oa katleho oa vacuum.Mokhoa ona ha o kenyelle ho potoloha ha rotor, kahoo bothata ba ho kuta le ho robeha ha colloidal ho bakoang ke ho potoloha ha rotor ho ka qojoa.Ho latela liphetho tsa liteko tse kaholimo, ho ka bonoa hore mokhoa ona o ka leka ka bongata matla a gel.Ha mocheso o le 100°C, matla a gel ea cellulose ether e nang le motsoako oa 4% e kholo ho feta 0.1 MPa (tekanyo e phahameng ea vacuum), 'me matla a ke ke a lekanngoa ho feta 0.1 MPa.Matla a gel, ke hore, moeli o ka holimo oa matla a gel a lekiloeng ka mokhoa ona ke 0,1 MPa.Tekong ena, matla a cellulose ether gel e kholo ho feta 0.1 MPa, kahoo mokhoa ona ha o loketse ho hlahloba matla a cellulose ether gel.

2.4 Ho sebetsa ha mokhoa o motle oa khatello ea ho hlahloba matla a gel ea cellulose ether

Mokhoa o motle oa khatello o ile oa sebelisoa ho lekola liphetho tsa liteko tsa matla a gel ea cellulose ether.Ho ka bonoa hore mokhoa ona o ka leka gel ka bongata ka matla a fetang 0.1 MPa.Mokhoa oa ho fumana lintlha o sebelisitsoeng tekong o etsa hore liphetho tsa liteko li nepahale ho feta data ea maiketsetso ea ho bala ka mokhoa oa vacuum degree.

3. Qetello

Matla a gel a cellulose ether a bonts'itse mokhoa o ntseng o eketseha ka kakaretso ka ho eketseha ha mocheso.Mokhoa oa ho potoloha le mokhoa oa "vacuum" oa katleho ha o lokele ho khetholla matla a cellulose ether gel.Mokhoa oa ho shebella o ka lekanya feela matla a selulose ether gel, 'me mokhoa o sa tsoa eketsoa oa khatello e ntle o ka leka ka bongata matla a selulose ether gel.