Ukwethulwa kohlelo lokusebenza kwe-cellulose mkhulu

I-Latex Paint iyingxube yemibala, i-filler dispersions kanye ne-polymer dispersions, kanye nezithasiselo kumele zisetshenziselwe ukulungisa i-viscosity yayo ukuze inezakhiwo ze-rheological ezidingekayo esigabeni ngasinye sokukhiqiza, ukugcinwa nokwakha. Izengezo ezinjalo zivame ukubizwa ngokuthi zikhudlwana, ezingakhuphula ukubonwa kwezimbozo futhi zithuthukise izakhiwo ze-mbosongo zezimbali, ngakho-ke zibizwa nangokuthi ama-herferers ezimboni.

Lokhu kulandela ukwethula kuphela izici eziphambili zabakhulu abavame ukusetshenziswa kwe-cellulose kanye nesicelo sabo ku-latex paints.
Izinto ze-Cellulosic ezingasetshenziswa ezitsheni zifaka i-methyl cellulose, i-hydroxyethyl cellulose, kanye ne-hydroxypropylyly methyl cellulose. Isici esikhulu kunazo zonke se-cellulose sikhulu ukuthi umphumela wokuqina uyamangalisa, futhi unganikeza upende umthelela othile wokugcina amanzi, ongabambezela isikhathi sokomisa ngopende ngezinga elithile, futhi wenze upende ube ne-Thixotropy ethile, evimba upende ekumisweni okuthile. I-teaturation kanye nokuqina ngesikhathi sokugcinwa, noma kunjalo, izikhulu ezinjalo nazo zinobunzima bokungabi nalutho olubi kakhulu ngopende, ikakhulukazi uma usebenzisa amamaki avelele aphezulu.

I-Cellulose iyinto edume izakhi zama-microorganisms, ngakho-ke izindlela zokulwa nethamba kufanele ziqiniswe lapho zilisebenzisa. Ama-cellulosic amikhulu angakhuphuka kuphela isigaba samanzi, kepha awunawo umphumela wokuqina kwezinye izingxenye ngopende osuselwa emanzini, futhi ngeke akwazi ukukhulisa i-bhelology yopende, ngakho-ke angeke akwazi ukuguqula i-bheology yopende, njalo, kungabikwa kuphela njenge-viscosity ye-KU).

1. I-Hydroxyethyl cellulose

Imininingwane namamodeli wemikhiqizo ye-Hydroxyethyl celtulose ahlukaniswa ikakhulu ngezinga lokufakwa esikhundleni kanye nokubonakala. Ngaphezu komehluko ekubonakaleni, izinhlobo ze-hydroxyethyl celtulese zingahlukaniswa ngohlobo olujwayelekile lwe-solubity, uhlobo olusheshayo lokuhlakazeka kanye nohlobo lokuqina lwebhayoloji ngokuguqulwa kwenqubo yokukhiqiza. Ngokuqondene nendlela yokusebenzisa ekhathazekile, i-Hydroxyyethyl celtule Uhlobo lokuhlupheka okusheshayo lungangezwa ngokuqondile ngesimo se-powder eyomile, kepha inani le-PH yohlelo ngaphambi kokungezelela kufanele libe ngaphansi kwenani eliphansi, bese kukhulisa inani le-PH ukuyenza lihlazise ngokushesha. Izinyathelo ezihambisanayo nazo zingasetshenziswa ukulungiselela ukugcwala okuthile kwe-glue futhi kwengeze ohlelweni lokupenda.

2. I-Hydroxypropylyly methyl cellulose

Umphumela wokuqina we-hydroxypropylllylylylylylylys ngokufanayo naleyo ye-hydroxyyethylcelcellellulose, okungukuthi, ukwandisa ukubonakala kokuhlanganiswa kwamanani aphansi naphakathi nendawo. I-Hydroxypropylllylyll imelana nokuwohloka kwe-enzymatic, kepha i-solubility yayo yamanzi ayiyinhle kangako njenge-hydroxyethyl cellulose, futhi inokungabi nambitheka kwama-gelling lapho kufudunyezwa. Nge-hydylcellulose ephathekayo engaphezulu, ingangezwa ngqo emanzini lapho isetshenziswa, ngemuva kokushukumisayo nokusabalalisa, engeza izinto ze-alkalia ezifana namanzi akwa-ammonia, shintsha kuze kuchithwe ngokuphelele. Nge-hydroxypropyll methylcellulose ngaphandle kokwelashwa komhlaba, kungathathwa futhi kuvunguswe ngamanzi ashisayo ngenhla kwama-85 ° C ngaphambi kokusebenzisa, bese kushukunyiswa ngamanzi abandayo, bese kushukunyiswa ngamanzi abandayo noma amaqhwa ukukuqeda ngokuphelele.

3. I-methyl cellulose

I-methylcellose inezinto ezifanayo kwi-hydroxypropylmerylcellellellellellulose, kepha azinzile kangako ekubonakaleni ngokushisa.

I-Hydroxyyethyl celtulose iyona ebanzi esetshenziswa kakhulu ngopende we-latex, futhi isetshenziswa kumapende aphezulu, aphakathi nendawo futhi aphansi ebanga le-latex kanye nopende obanzi we-latex. Kusetshenziswe kabanzi ekukhuleni kopende we-latex ojwayelekile, i-grey calcium powk tatex takex takex, njll. Okwesibili yi-hydroxypropyllllylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylyllose methylcellulose, nayo isetshenziswa ngenani elithile ngenxa yokukhuthaza abakhiqizi. I-methyl cellulose ayisetshenziswa kangako kupende we-latex, kepha isetshenziswa kabanzi ku-powdery ingaphakathi ne-powter wall putty ngenxa yokuqedwa kwalo okusheshayo nokugcinwa kwamanzi okuhle. I-Vissusity ephezulu ye-methyl celtulese ingavuselela i-putty nge-twixotropy evelele nokugcinwa kwamanzi, okwenza kube nezindawo ezinhle zokuklebhu.