I-Sodium carboxymethyl cellulose (CMC) yokugqoka iphepha

I-Sodium carboxymethyl cellulose (CMC)iyi-polymer encibilika emanzini e-anionic etholakala ngokuguqulwa kwamakhemikhali ngokusekelwe ku-cellulose yemvelo. Inokuncibilika kwamanzi okuhle, isici sokwakha ifilimu, ukunamathela, ukuqina kanye nokuqina kokumiswa, futhi isetshenziswa kabanzi ekuxhumaneni okuningi kwemboni yokwenza iphepha, ikakhulukazi ekwakhiweni kokumboza iphepha.

1. Izidingo eziyisisekelo zokugqoka iphepha

Inhloso eyinhloko yokugqoka iphepha ukuthuthukisa izakhiwo zobuso bephepha, okuhlanganisa ukushelela, ukucwebezela, ukungabonakali, ukumuncwa kweyinki, ukuzivumelanisa nezimo zokuphrinta, njll. Amafomula okugqoka avamile akhiwa ngama-pigment (njenge-kaolin, i-calcium carbonate, i-talc, njll.), ama-binder (njenge-emulsions, isitashi, i-CMC, njll.) kanye nezinye izithasiselo (njengezihlakaza, izinto zokugcoba, izinto zokuvimbela amanzi, njll.). Ngesikhathi senqubo yokugqoka, ukuzinza kanye nokugeleza kwefomula yokugqoka kanye nesakhiwo sokugqoka ngemva kokomisa kudlala indima ebalulekile ekhwalithini yokugcina yephepha.

2. Indima ye-CMC ekumbozeni iphepha

2.1. Umsebenzi we-Binder

I-CMC ingasetshenziswa njengesihlanganisi esisizayo semibala, futhi isebenze nesihlanganisi esiyinhloko (njenge-emulsion, isitashi) ukuthuthukisa ukunamathela kwemibala ebusweni bephepha, ngaleyo ndlela kuthuthukiswe ukushesha kokumboza kanye nokumelana nokuxebuka.

2.2. Umlawuli we-thickener kanye ne-rheology

I-CMC ingakha isixazululo se-colloidal esinobuthi obuthile emanzini, esingalungisa ngempumelelo izakhiwo ze-rheological zesembozo, sithuthukise ukufana kanye nokuqina kwesembozo ngesikhathi senqubo yokumboza, futhi sisize ekutholeni ukujiya kwesembozo okufanayo.

2.3. Isiqinisi sokuhlakazeka

Ukwengeza inani elifanele le-CMC kufomula yokumboza kungathuthukisa ukuhlakazeka kwezinhlayiya ze-pigment, kuvimbele ukuthungwa kwe-pigment kanye nokugoba, futhi kuqinisekise ukuzinza kwe-coating ngesikhathi sokugcina nokusetshenziswa.

2.4. Thuthukisa ukusebenza kokumboza

I-CMC inokuguquguquka okuhle kanye nokufana kwefilimu ngemva kokwakheka kwefilimu, okungathuthukisa kakhulu ukuthamba kobuso, ukushelela kanye nokuzivumelanisa nezimo kokunyathelisa, okulungele kakhulu iphepha elimboziwe, amakhadibhodi amhlophe ambozwe, iphepha lokunyathelisa eliphakeme, njll.

2.5. Ukugcinwa kwamanzi kanye nokuthamba kwawo

I-CMC ingathuthukisa amandla okugcina amanzi endwangu, ivimbele ukuguquguquka okusheshayo kwamanzi endwangu ngaphansi kwendawo yokumboza ngesivinini esikhulu noma yokomisa, futhi iqinisekise ukwakheka okufanayo kwendwangu; ngesikhathi esifanayo, ukuthambisa kwayo kusiza futhi ukunciphisa ukungqubuzana kwemishini nokuthuthukisa ukusebenza kahle kokukhiqiza.

3. Izici zokusetshenziswa kwe-CMC

3.1. Ukuncibilika kwamanzi okuhle kakhulu

I-CMC kulula ukuyincibilikisa emanzini abandayo, kulula ukuyisebenzisa, futhi ingalungiswa ngqo ekushiseni kwegumbi ngaphandle kokwelashwa kokushisa.

3.2. Izinhlobo ze-viscosity ezicebile

I-CMC enamazinga ahlukene e-viscosity ifanele izinhlobo ezahlukene zephepha elimboziwe kanye nezidingo zenqubo. Abasebenzisi bangakhetha imodeli efanele ngokwezidingo zangempela.

3.3. Ukuqina okuhle kwamakhemikhali

I-CMC ibekezelela ukushisa, ukukhanya, i-asidi kanye ne-alkali, futhi akulula ukuyiwohloza noma ukuyiwohloza ngemva kokusetshenziswa isikhathi eside.

3.4. Inobungani nemvelo futhi ayinabo ubuthi

Njenge-cellulose derivative evela emithonjeni yemvelo, i-CMC ayinabo ubuthi futhi ayinangozi, okuhambisana nesiqondiso sokuthuthukiswa kokuvikelwa kwemvelo okuluhlaza embonini yokwenza amaphepha.

4. Amaphuzu abalulekile enqubo yesicelo

Ekusetshenzisweni kwangempela, ukuze kuqinisekiswe ukuthi i-CMC idlala indima engcono kakhulu ohlelweni lokumboza, amaphuzu alandelayo kufanele aqashelwe:

4.1. Indlela efanele yokuncibilikisa

Ngaphambi kokusebenzisa i-CMC, kufanele ifakwe kancane kancane emanzini abandayo axutshwayo ngesivinini esikhulu ukuze kugwenywe ukuhlangana kanye nokuqina ngokweqile kwendawo. Kunconywa ukuthi uyifake ngamaqoqo bese uqhubeka uyixuba kuze kube yilapho incibilika ngokuphelele.

4.2. Ukulawulwa okufanele kwesilinganiso

Ngokuvamile, inani le-CMC elingeziwe lingu-0.1% kuya ku-0.5% wesisindo esomile sesembozo. Inani lilungiswa ngokuya ngezidingo zokusebenza kwesembozo kanye nenqubo yokumboza. Ukwengeza okuningi kakhulu kungabangela ukuthi i-viscosity yesembozo ibe phezulu kakhulu, okuthinta ukusebenza kwesembozo.

4.3. Ukuhambisana okuhle nezinye izithako

I-CMC iyahambisana nezinhlobonhlobo zezithasiselo zokumboza (njenge-emulsions, i-dispersants, izithasiselo, njll.), kodwa kufanele kuqashelwe ukuhambisana kwayo nezithasiselo ezinamandla ze-cationic ukuvimbela ukugoba kanye nemvula.

5. Izibonelo zokusetshenziswa kwe-CMC ezinhlotsheni ezahlukene zephepha

Iphepha elimboziwe: lisetshenziselwa ukuthuthukisa ukushelela nokukhanya kwengubo, ngenkathi kuthuthukiswa ukunamathela kwengubo;

Ikhadibhodi elimhlophe: kuthuthukisa ukumelana nokugoqeka kanye nokuzivumelanisa nezimo kokuphrinta;

Iphepha lokufaka ilebula kanye nephepha lokushisa: thuthukisa ukufana kokumbozwa kobuso kanye nokucaca kokuphrinta;

Iphepha elisha elimboziwe: kuthuthukisa ukuzinza koketshezi olumboziwe futhi kunciphise ukwenzeka kokungena kweyinki yokunyathelisa.

Njengenhlanganisela ye-polymer yemvelo esebenza kahle kakhulu, i-sodium carboxymethyl cellulose idlala imisebenzi eminingi ekumbozweni kwephepha, njengokubopha, ukuqina, ukuhlakaza nokuthuthukisa izakhiwo zomphezulu. Izindleko zayo eziphansi, ukuzinza okuhle kanye nezici zokuvikela imvelo zenza ukuthi ithathe isikhundla esibalulekile embonini yanamuhla yokwenza iphepha. Ngokuthuthuka okuqhubekayo kwezidingo zekhwalithi yephepha kanye nokukhuthazwa kwemibono yokwenza iphepha eluhlaza,I-CMC izoqhubeka nokudlala amandla amaningi okusetshenziswa emkhakheni wezingubo zephepha.