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Ho sebelisoa ha polyanionic cellulose (PAC) ka mokelikeli oa ho cheka o thehiloeng metsing

Polyanionic cellulose (PAC) e sebelisoa haholo-holo e le se fokotsang tahlehelo ea mokelikeli, se matlafatsang viscosity le regulator ea rheological mokelikeli oa ho cheka.Pampiri ena e hlalosa ka bokhutšoanyane li-index tsa mantlha tsa 'mele le tsa lik'hemik'hale tsa PAC, tse kang viscosity, rheology, substitution uniformity, bohloeki le letsoai la viscosity karo-karolelano, hammoho le li-index tsa ts'ebeliso ea mokelikeli oa ho cheka.
Sebopeho se ikhethileng sa limolek'hule tsa PAC se etsa hore e bonts'e ts'ebetso e ntle haholo ea ts'ebeliso metsing a hloekileng, metsi a letsoai, metsi a leoatle le metsi a letsoai a nang le letsoai.Ha e sebelisoa e le sethibelo sa filtrate mokelikeli oa ho cheka, PAC e na le bokhoni bo nepahetseng ba ho laola tahlehelo ea metsi, 'me kuku e entsoeng ka seretse e tšesaane ebile e thata.Joaloka viscosifier, e ka ntlafatsa ka potlako ponahalo e hlakileng, viscosity ea polasetiki le matla a matla a ho kuta a mokelikeli oa ho cheka, le ho ntlafatsa le ho laola rheology ea seretse.Lisebelisoa tsena tsa kopo li amana haufi-ufi le li-index tsa 'mele le tsa lik'hemik'hale tsa lihlahisoa tsa bona.

1. Viscosity ea PAC le ts'ebeliso ea eona mokelikeli oa ho cheka

PAC viscosity ke tšobotsi ea tharollo ea colloidal e entsoeng ka mor'a ho qhibiliha ka metsing.Boitšoaro ba rheological ba tharollo ea PAC bo na le tšusumetso ea bohlokoa ts'ebetsong ea eona.Viscosity ea PAC e amana le tekanyo ea polymerization, mahloriso a tharollo le mocheso.Ha re bua ka kakaretso, ha tekanyo ea polymerization e phahame, e na le viscosity e phahameng;Viscosity e ile ea eketseha ka keketseho ea mahloriso a PAC;The viscosity tharollo fokotseha ka ho eketseha ha mocheso.NDJ-79 kapa Brookfield viscometer hangata e sebelisoa ho lekola viscosity ho index ea 'mele le ea lik'hemik'hale ea lihlahisoa tsa PAC.Viscosity ea lihlahisoa tsa PAC e laoloa ho latela litlhoko tsa kopo.Ha PAC e sebelisoa e le tackifier kapa rheological regulator, PAC e na le viscosity e phahameng hangata e hlokahalang (mohlala oa sehlahisoa hangata ke pac-hv, pac-r, joalo-joalo).Ha PAC e sebelisoa haholo-holo e le se fokotsang tahlehelo ea mokelikeli 'me e sa ekelle viscosity ea mokelikeli oa ho cheka kapa ho fetola rheology ea mokelikeli oa ho cheka o sebelisoang, lihlahisoa tsa PAC tse nang le viscosity e tlaase lia hlokahala (mefuta ea lihlahisoa hangata ke pac-lv le pac-l).
Ts'ebetsong e sebetsang, rheology ea mokelikeli oa ho phunya e amana le: (1) bokhoni ba mokelikeli oa ho phunya ho jara li-cuttings tsa ho phunya le ho hloekisa seliba;(2) Matla a Lefi;(3) Phello e tsitsitseng leboteng la shaft;(4) Moralo oa ntlafatso oa liparamente tsa ho phunya.Rheology ea mokelikeli oa ho phunya hangata o lekoa ke 6-speed rotary viscometer: 600 rpm, 300 rpm, 200 rpm, 100 rpm le 6 rpm.Lipalo tsa 3 RPM li sebelisetsoa ho bala viscosity e bonahalang, viscosity ea polasetiki, matla a ho kuta a matla le matla a ho kuta a static, a bontšang rheology ea PAC mokelikeli oa ho cheka.Boemong bo tšoanang, ha viscosity ea PAC e phahame, ke hona moo ponahalo e bonahalang e bonahalang le viscosity ea polasetiki e phahameng, 'me matla a mahlahahlaha a kuta le matla a ho kuta a tsitsitseng a phahame.
Ho feta moo, ho na le mefuta e mengata ea metsi a cheka a thehiloeng metsing (joalo ka mokelikeli oa metsi a hloekileng, mokelikeli oa ho cheka lik'hemik'hale, mokelikeli oa ho phunya calcium, mokelikeli oa ho phunya letsoai, metsi a ho phunya metsi a leoatle, joalo-joalo), kahoo rheology ea PAC ka litsela tse fapaneng. Sisteme ea mokelikeli oa ho cheka e fapane.Bakeng sa litsamaiso tse khethehileng tsa mokelikeli oa ho cheka, ho ka 'na ha e-ba le ho kheloha ho hoholo ha ho hlahlojoa phello ea mokelikeli oa ho cheka feela ho tsoa ho index ea viscosity ea PAC.Ka mohlala, tsamaisong ea metsi a ho cheka metsi a leoatle, ka lebaka la letsoai le lengata, le hoja sehlahisoa se na le viscosity e phahameng, tekanyo e tlaase ea ho fetola sehlahisoa e tla lebisa ho khanyetso e tlaase ea letsoai ea sehlahisoa, e leng se fellang ka ho fokotseha ha viscosity e ntseng e eketseha. ea sehlahisoa nakong ea ts'ebeliso, e bakang viscosity e tlase e bonahalang, viscosity e tlase ea polasetiki le matla a tlase a matla a ho kuta a mokelikeli o chekang, e leng se bakang bokhoni bo bobe ba mokelikeli oa ho cheka ho jara li-cuttings tsa ho phunya, tse ka lebisang ho ts'oarella ho tebileng. linyeoe.

2.Tekanyo ea ho fetola le ho tšoana ha PAC le ts'ebetso ea eona ea ts'ebeliso ea mokelikeli oa ho cheka

Tekanyo ea phetoho ea lihlahisoa tsa PAC hangata e kholo ho feta kapa e lekana le 0.9.Leha ho le joalo, ka lebaka la litlhoko tse fapaneng tsa bahlahisi ba fapaneng, boemo ba lihlahisoa tsa PAC bo fapane.Lilemong tsa morao tjena, lik'hamphani tsa litšebeletso tsa oli li 'nile tsa tsoela pele ho ntlafatsa litlhoko tsa ts'ebetso ea lihlahisoa tsa PAC,' me tlhokahalo ea lihlahisoa tsa PAC tse nang le boemo bo phahameng ba ho nkeloa sebaka e ntse e eketseha.
The substitution degree le ho ts'oana ha PAC li amana haufi-ufi le karo-karolelano ea letsoai la viscosity, ho hanyetsa letsoai le tahlehelo ea ho hloekisa sehlahisoa.Ka kakaretso, ha boemo ba PAC bo le boemong bo phahameng, ho tla ba le ho tšoana ho hoholo, 'me ho ntlafatsa karo-karolelano ea letsoai, ho hanyetsa letsoai le ho sefa sehlahisoa.
Ha PAC e qhibiliha ka tharollo e matla ea electrolyte inorganic salt, viscosity ea tharollo e tla fokotseha, e leng se etsang hore ho be le phello e bitsoang letsoai.Li-ion tse ntle tse entsoeng ke letsoai le - coh2coo - Ketso ea sehlopha sa anion ea H2O e fokotsa (kapa e felisa) homoelectricity ka lehlakoreng la ketane ea molek'hule ea PAC.Ka lebaka la matla a sa lekaneng a ho khutlisa motlakase, li-curls tsa limolek'hule tsa PAC le ho holofala, le litlamo tse ling tsa haedrojene lipakeng tsa liketane tsa limolek'hule, tse senyang sebopeho sa sebaka sa pele mme ka ho khetheha li fokotsa viscosity ea metsi.
Ho hanyetsa letsoai ha PAC hangata ho lekanyetsoa ka letsoai la viscosity ratio (SVR).Ha boleng ba SVR bo phahame, PAC e bontša botsitso bo botle.Ka kakaretso, ha tekanyo ea ho kenya sebaka e phahame le ho ntlafatsa ho tšoana ha ho nkela sebaka, ho phahamisa boleng ba SVR.
Ha PAC e sebelisoa e le sehlakisi sa filtrate, e ka ionize ka har'a li-anion tse telele tse nang le mefuta e mengata ka har'a mokelikeli oa ho cheka.Lihlopha tsa hydroxyl le ether tsa oksijene ka ketane ea eona ea limolek'hule li etsa li-bond tsa haedrojene tse nang le oksijene holim'a likaroloana tsa viscosity kapa li theha maqhama a ho hokahanya le Al3 + moeling oa bond ea likaroloana tsa letsopa, e le hore PAC e ka khabisoa ka letsopa;The hydration ea lihlopha tse ngata tsa sodium carboxylate e tenya filimi ea hydration holim'a likaroloana tsa letsopa, e thibela ho bokellana ha likaroloana tsa letsopa ka likaroloana tse kholo ka lebaka la ho thulana (ts'ireletso ea sekhomaretsi), 'me likaroloana tse ngata tse ntle tsa letsopa li tla hlahisoa ketane ea molek'hule ea PAC ho. ka nako e tšoanang ho theha e tsoakiloeng netweke sebopeho koahela tsamaiso eohle, e le ho ntlafatsa aggregation botsitso ba dikarolwana viscosity, sireletsa dikahare tsa likaroloana mokelikeli ho cheka le ho theha kaka e teteaneng ea seretse, Fokotsa filtration.Ha tekanyo ea ho nkela lihlahisoa tsa PAC e phahame, lintho tse ka hare ho sodium carboxylate li phahame, li etsa hore ho be bonolo ho fetola, 'me filimi ea hydration e tšoane haholo, e leng se etsang hore tšireletso ea gel e matlafale ea PAC mokelikeli oa ho cheka, kahoo le ho feta. pepeneneng phello ea phokotso ea tahlehelo ea mokelikeli.

3. Bohloeki ba PAC le ts'ebeliso ea eona mokelikeli oa ho cheka

Haeba tsamaiso ea mokelikeli oa ho phunya e fapane, tekanyo ea phekolo ea mokelikeli oa ho cheka le moemeli oa phekolo e fapane, kahoo litekanyetso tsa PAC lits'ebetsong tse fapaneng tsa mokelikeli oa ho cheka li ka fapana.Haeba tekanyo ea PAC ka mokelikeli oa ho cheka e hlalositsoe 'me mokelikeli oa ho phunya o na le rheology e ntle le phokotso ea filtration, e ka finyelloa ka ho lokisa bohloeki.
Tlas'a maemo a tšoanang, ho hloeka ha PAC ho phahame, ho etsa hore sehlahisoa se sebetse hantle.Leha ho le joalo, bohloeki ba PAC ka ts'ebetso e ntle ea sehlahisoa ha se hakaalo hore e phahame.Tekanyo pakeng tsa ts'ebetso ea sehlahisoa le bohloeki e hloka ho khethoa ho latela maemo a sebele.

4. Ts'ebetso ea ts'ebetso ea ts'ireletso ea PAC ea antibacterial le tikoloho ho mokelikeli oa ho cheka

Tlas'a maemo a itseng, likokoana-hloko tse ling li tla etsa hore PAC e bola, haholo-holo tlas'a ts'ebetso ea cellulase le tlhōrō ea amylase, e leng se bakang ho robeha ha ketane e kholo ea PAC le ho thehoa ha tsoekere e fokotsang, tekanyo ea polymerization e fokotseha, 'me viscosity ea tharollo e fokotseha. .Bokhoni ba anti enzyme ba PAC bo ipapisitse le ho ts'oana ha limolek'hule le boemo ba phetoho.PAC e nang le phetoho e ntle e ts'oanang le boemo bo phahameng ba ho fetola e na le ts'ebetso e ntle ea anti enzyme.Lebaka ke hobane ketane ea mahlakoreng e hokahantsoeng ke masala a tsoekere e ka thibela ho bola ha enzyme.
The substitution degree ea PAC e batla e phahame, kahoo sehlahisoa se na le ts'ebetso e ntle ea antibacterial 'me e ke ke ea hlahisa monko o bolileng ka lebaka la ho belisoa ha ho sebelisoa ha sebele, kahoo ha ho hlokahale ho eketsa li-preservatives tse khethehileng, tse loketseng ho haha ​​​​setšeng.
Hobane PAC ha e na chefo ebile ha e na kotsi, ha e na tšilafalo tikolohong.Ho phaella moo, e ka senyeha tlas'a maemo a khethehileng a likokoana-hloko.Ka hona, ho batla ho le bonolo ho phekola PAC ka mokelikeli oa litšila oa ho cheka, 'me ha ho kotsi tikolohong ka mor'a phekolo.Ka hona, PAC ke sehlahisoa se setle sa ts'ireletso ea tikoloho ea ho cheka mokelikeli.


Nako ea poso: May-18-2021