Izici ezithinta ukugcinwa kwamanzi kwama-cellulose ethers

Ama-cellulose ether ayisigaba esibalulekile sezinto ze-polymer ezincibilika emanzini, ezisetshenziswa kabanzi ekwakheni, kwezokwelapha, ekudleni, kumakhemikhali ansuku zonke nakwezinye izimboni. Emkhakheni wokwakha (njengodaka oluxutshwe okomile, inhlaka yethayela, i-putty powder, njll.), esinye sezimpawu ezibaluleke kakhulu zeama-ether e-celluloseukugcinwa kwamanzi kwayo, okungukuthi, ingagcina amanzi ohlelweni ngesikhathi sokusetshenziswa ukuvimbela amanzi ukuthi angahwamuki noma angene ngokushesha kakhulu, ngaleyo ndlela kuqinisekiswe ukwakhiwa nokusebenza kokugcina kwezinto. Kunezici eziningi ezithinta ukugcinwa kwamanzi kwama-cellulose ethers, ikakhulukazi okuhlanganisa isakhiwo samakhemikhali ayo, izinga lokufakwa esikhundleni, i-viscosity, inani lokwengeza, usayizi wezinhlayiya, izinga lokuncibilika, kanye nezici zemvelo zangaphandle.

1. Izici ze-cellulose ethers ngokwazo

Izinga Lokufaka Esikhundleni (DS) kanye nokufana

Izinga lokushintsha libhekisela enanini elimaphakathi lamaqembu e-hydroxyl kuma-molecule e-cellulose athathelwe indawo amaqembu e-ether. Ngokuvamile, uma izinga lokushintsha liphezulu, kulapho i-hydrophilicity yama-ether e-cellulose iqina khona futhi kulapho amandla okugcina amanzi eba ngcono khona. Kodwa-ke, kukhona nenani elithile elibalulekile. Inani eliphakeme kakhulu lizoholela ekuncibilikeni ngokweqile kanye nokugcotshwa ngokweqile, okuzothinta ukuzinza kwesakhiwo sezinto ezibonakalayo.

Ukufana kokushintshana nakho kubalulekile. Uma ukushintshana kufana kakhulu, isakhiwo senethiwekhi esakhiwe yi-cellulose ether emanzini sizinzile kakhulu, futhi singagcina umswakama ngempumelelo.

Ukuthamba

Ukuqina kwe-cellulose ether emanzini kuthinta ngqo "ikhono layo lokuvala" umswakama. Ngokuvamile, ama-cellulose ethers ane-viscosity ephezulu (njenge-HPMC, i-HEMC, njll.) angakha isakhiwo senethiwekhi esinobukhulu obuthathu, anciphise ijubane lokufuduka kwamanzi, ngaleyo ndlela athuthukise ukugcinwa kwamanzi. Kodwa-ke, ukuqina okuphezulu kakhulu kuzothinta ukusebenza kwezinto, njengokwanda kobunzima bokwakha noma ukungalingani kokumboza.

Isisindo sama-molecular kanye nezinga le-polymerization

Uma isisindo sama-molecule se-cellulose ether sikhulu, kulapho ukunamathelana phakathi kwezingxenye zeketanga kuqina khona, kulapho isixazululo se-colloidal esakhiwe siba lukhuni khona, futhi kulapho ukugcinwa kwamanzi kuqina khona. Kodwa-ke, kudingeka kutholakale ibhalansi phakathi kokugcinwa kwamanzi amaningi kanye nokuncibilika kalula.

Usayizi wezinhlayiya kanye nokusabalala kwazo

Usayizi wezinhlayiya zempuphu eluhlaza ye-cellulose ether uthinta izinga lokuncibilika kwayo kanye nokusabalala kwayo emanzini. Uma usayizi wezinhlayiya uncane, izinga lokuncibilika lishesha, futhi kulula ukusatshalaliswa ngokulinganayo ezintweni, ngaleyo ndlela kudlala indima engcono ekugcineni amanzi. Kodwa-ke, impuphu ecolekile kakhulu kulula ukuyimunca umswakama futhi ihlangane ngesikhathi sokugcina nokuthuthwa, okuthinta ukusebenza.

2. Sebenzisa ifomula kanye nezici ezihlobene nohlelo

Inani lokwengeza

Inani le-cellulose ether engezwe kufomula lithinta ngqo ukusebenza kokugcinwa kwamanzi. Ngokuvamile, njengoba inani lokwengeza landa, ukugcinwa kwamanzi kuthuthuka kakhulu, kodwa ngemva kokudlula ibanga elithile, umphumela wokwanda uzothambekela ekugcwaleni, futhi uzothinta nezindleko kanye nokusebenza kokwakhiwa.

Ukumuncwa kwamanzi kwezinye izinto zokusetshenziswa

Ukumuncwa kwamanzi kwezinto zokusetshenziswa ezifana nesamente, i-gypsum, isihlabathi, njll. kuzothinta nokugcinwa kwamanzi. Izinto ezimuncwa amanzi ngamandla zizomunca amanzi ngokushesha ohlelweni, zisheshise ukoma, futhi zenze umphumela wokugcina amanzi we-cellulose ether ubaluleke kakhulu. Ngakho-ke, kulolu hlobo lwesistimu, kudingeka i-cellulose ether ene-viscosity ephezulu noma inani eliphezulu lokwengeza.

Isilinganiso samanzi nosimende (W/C)

Ezintweni zokwakha, izinguquko esilinganisweni samanzi nosimende zithinta nokugcinwa kwamanzi kwe-cellulose ether. Uma isilinganiso samanzi nosimende siphansi, kuba namanzi amancane ohlelweni, futhi ingcindezi yokugcina amanzi ye-cellulose ether inkulu; uma isilinganiso samanzi nosimende siphezulu, kuba namanzi anele ohlelweni, futhi i-cellulose ether ingalibazisa ukulahleka kwamanzi ngempumelelo.

3. Izici zemvelo

Izinga lokushisa

Ukwanda kwezinga lokushisa kuzosheshisa izinga lokuhwamuka kwamanzi, futhi kubeke phambili izidingo eziphakeme zokugcinwa kwamanzi kwe-cellulose ether. Ikakhulukazi ezindaweni ezishisayo nezomile, uma ukusebenza kokugcinwa kwamanzi kwe-cellulose ether kukubi, kulula ukubangela ukuthi udaka, i-putty nezinye izinto zokwakha ziqhekeke, zibe yimpuphu futhi zingabi namandla anele.

Kufanele kuqashelwe ukuthi ukuncibilika kwe-cellulose ether ekushiseni okuphezulu nakho kuzoshintsha, kanti ezinye izinhlobo zizofaka ijeli, okuthinta umsebenzi wayo wokulawula umswakama.

Umswakama kanye nesivinini somoya

Uma umswakama womoya uphansi futhi isivinini somoya siphezulu, ukuhwamuka kwamanzi kuyashesha, futhi uhlelo lunamathuba amaningi okulahlekelwa amanzi, okudinga i-ejenti yokugcina amanzi esebenza kahle ukuze ibhekane nakho. Endaweni enomswakama ophezulu, amanzi akulula ukuwalahla, futhi ingcindezi yokugcina amanzi ye-cellulose ether incane kakhulu.

4. Izici zokwakha

Ubukhulu bokumboza kanye nendlela yokusebenza

Ukwembozwa kwesendlalelo esincane kungenzeka kakhulu ukuthi kulahlekelwe amanzi kunesendlalelo esijiyile, ngakho-ke ukwakhiwa kwesendlalelo esincane kuncike kakhulu ku-cellulose ether enokugcinwa kwamanzi okuphezulu. Ngesikhathi esifanayo, ukufana kokuxuba, indlela yokumboza (yomshini noma yesandla), izinga lokumuncwa kwamanzi e-substrate, njll. kuzothinta nokusebenza kwangempela kokusebenza kokugcinwa kwamanzi.

Ukumuncwa kwamanzi kwe-substrate

Isibonelo, ukumuncwa kwamanzi kwezingxenye ezingaphansi komhlaba ezifana nezitini, ukhonkolo, namabhodi e-gypsum kuhlukile, okuzothinta ikhono le-cellulose ether lokugcina amanzi. Uma i-substrate imuncwa kakhulu, kulapho izomunca khona amanzi ngokushesha kusuka ku-mortar, futhi i-cellulose ether idinga ukwakha ngokushesha isithiyo sokugcina amanzi.

IImpahla yokugcina amanzi ye-cellulose etheriyisici esinqunywa yizici eziningi. Isakhiwo sayo (njengezinga lokushintsha, i-viscosity, usayizi wezinhlayiya), indawo yokusetshenziswa (izinga lokushisa, umswakama, isivinini somoya) kanye nefomula yokwakha (inani lokwengeza, isilinganiso samanzi-isamente, izici zezinto zokusetshenziswa) kuzoba nomthelela omkhulu ekusebenzeni kwayo. Ngakho-ke, ekusetshenzisweni, uhlobo kanye nenani le-cellulose ether kufanele kukhethwe ngokufanele ngokwesimo esithile sokusetshenziswa kanye nomklamo wefomula ukuze kufezwe umphumela omuhle kakhulu wokugcina amanzi kanye nokusebenza kokwakhiwa.