Ho tloha ha ho qaloa lidae tse sebetsang lilemong tse lekholo tse fetileng, sodium alginate (SA) e bile setsi se seholo sa khatiso ea dae e sebetsang maselang a k'hothone.
peisetsa.Leha ho le joalo, ka ntlafatso e tsoelang pele ea litlhoko tsa batho bakeng sa phello ea khatiso, alginate ea sodium e le peista ea khatiso ha e hanyetsane le acid e matla le alkali.
'Me viscosity ea sebopeho e nyane, kahoo ts'ebeliso ea eona ho khatiso ea skrine e chitja (e bataletseng) e lekanyelitsoe ho isa tekanyong e itseng;
Theko ea sodium alginate e boetse e phahama, kahoo batho ba qalile lipatlisiso ka mekhoa e meng ea eona, cellulose ether ke e 'ngoe ea tsa bohlokoa.
mosa.Empa hajoale thepa e ka sehloohong e sebelisoang bakeng sa ho lokisa cellulose ether ke k'hothone, tlhahiso ea eona e ntse e theoha, 'me theko e ntse e eketseha.
Ho feta moo, li-etherifying agents tse sebelisoang ka tloaelo tse kang chloroacetic acid (chefo e ngata) le ethylene oxide (carcinogenic) le tsona li kotsi ho feta 'meleng oa motho le tikolohong.
Ka lebaka la sena, pampiring ena, cellulose ether e ile ea ntšoa litšila tsa limela, 'me sodium chloroacetate le 2-chloroethanol li ne li sebelisoa e le li-etherifying agents ho lokisa carboxylate.
Mefuta e meraro ea likhoele: methyl cellulose (CMC), hydroxyethyl cellulose (HEC) le hydroxyethyl carboxymethyl cellulose (HECMC)
tharoli-cellulose ethersle SA li ile tsa sebelisoa khatisong ea dae e sebetsang ka lesela la k'hothone, 'me liphello tsa tsona tsa khatiso li ile tsa bapisoa le ho ithutoa.
tholoana.Litaba tsa mantlha tsa lipatlisiso tsa thesis li arotsoe likarolo tse tharo:
(1) Ntša selulose litšila tsa limela.Ka ho phekola litšila tse hlano tsa limela (lehlaka la raese, lekhapetla la raese, joang ba koro, sawdust ea phaene.
le bagasse) bakeng sa boikemisetso le tlhahlobo ea likarolo (mongobo, molora, lignin, cellulose le hemicellulose), tse khethiloeng.
Lisebelisoa tse tharo tsa limela tse emelang (phaene sawdust, joang ba koro le bagasse) li sebelisoa ho ntša selulose, 'me selulose e ntšoa.
Ts'ebetso e ile ea ntlafatsoa;tlas'a maemo a optimized process, mekhahlelo ea pine cellulose, koro straw cellulose le bagasse cellulose e ile ea fumanoa.
Bohloeki bo ka holimo ho 90%, 'me chai e ka holimo ho 40%;e ka bonoa tlhahlobong ea mahlaseli a mahlaseli a kotsi le mahlaseli a mahlaseli a kotsi a mahlaseli a kotsi.
Lignin le hemicellulose li tlosoa ha e le hantle, 'me cellulose e fumanoeng e na le bohloeki bo phahameng;ho ka bonoa ho tsoa tlhahlobong ea X-ray diffraction hore e tšoana le thepa e tala ea semela.
Ha ho bapisoa, kristale e lekanyelitsoeng ea sehlahisoa se fumanoeng e ntlafatsoa haholo.
(2) Ho itokisa le ho khetholla li-cellulose ethers.Ho sebelisoa selulose ea lehong la phaene e ntšitsoeng ho sawdust ea phaene e le thepa e tala, ho ile ha etsoa teko ea ntlha e le 'ngoe.
The concentrated alkali decrystallization pretreatment process of pine cellulose e ile ea ntlafatsoa;le ka ho rala liteko tsa orthogonal le liteko tsa ntho e le 'ngoe, the
Mekhoa ea ho lokisa CMC, HEC le HECMC ho tloha phaene lehong la alkali cellulose li ile tsa ntlafatsoa ka ho latellana;
CMC e nang le DS ho fihla ho 1.237, HEC e nang le MS ho fihla ho 1.657, le HECMC e nang le DS ea 0.869 e fumanoe.Ho latela tlhahlobo ea FTIR le H-NMR, lihlopha tsa ether tse tsamaellanang li ile tsa kenngoa lihlahisoa tse tharo tsa cellulose etherification;
Mefuta ea kristale ea plain ethers CMC, HEC le HEECMC kaofela e fetohile mofuta oa cellulose II, 'me crystallinity e fokotsehile haholo.
(3) Ts'ebeliso ea setlolo sa ether ea cellulose.Mefuta e meraro ea li-cellulose ethers tse lokiselitsoeng tlas'a maemo a nepahetseng a ts'ebetso li ne li sebelisetsoa lesela la k'hothone
E hatisitsoe ka lidae tse sebetsang le ho bapisoa le sodium alginate.Boithuto bona bo fumane hore SA, CMC, HEC le HECMC ke mabaka a mane a bakang
Li-pastes kaofela ke maro a pseudoplastic, 'me pseudoplasticity ea li-ether tse tharo tsa cellulose e molemo ho feta ea SA;tatellano ya sekgahla sa popeho ya makumane a mane
Ke: SA > CMC > HECMC > HEC.Mabapi le phello ea khatiso, CMC e bonahala e hlahisa lihlahisoa le ho kenella, letsoho la khatiso
Sensitivity, printing color fastness, joalo-joalo li tšoana le SA, 'me sekhahla sa depaste sa CMC se molemo ho feta SA;
SA e ts'oana, empa tlhahiso ea 'mala e hlakileng ea HEC, permeability le ho potlaka ha li-rubbing li tlase ho feta SA;HECMC khatiso e ikutloa, itlotsa khanyetso
Ho potlaka ha 'mala ho rubbing ho tšoana le SA, 'me sekhahla sa ho tlosa peista se phahame ho feta SA, empa lihlahisoa tse bonahalang tsa mebala le botsitso ba polokelo ea HEECMC li tlase ho SA.
Mantsoe a bohlokoa: litšila tsa semela;cellulose;cellulose ether;phetoho ea etherification;khatiso e sebetsang ea dae;
Nako ea poso: Sep-26-2022