CMC viscosity ekwenzeni iphepha

I-CMC (i-carboxymethyl cellulose) kwishishini le-papermaking iyongezelelo ebalulekileyo esetyenziselwa ukuphucula umgangatho kunye nokusebenza kwephepha. I-CMC yikhompawundi yepolymer enyibilikayo emanzini eneempawu zohlengahlengiso ezilungileyo ze-viscosity kwaye idlala indima ebalulekileyo ekwenzeni iphepha.

1. Iipropati ezisisiseko ze-CMC
I-CMC iphuma kwi-cellulose, eyenziwa ngokusabela inxalenye ye-hydroxyl ye-cellulose kunye ne-chloroacetic acid. Inokunyibilika kwamanzi okugqwesileyo kunye nokukwazi ukulungisa i-viscosity. I-CMC yenza isisombululo se-viscous emva kokunyibilika emanzini, okwenza kube luncedo kakhulu kwizicelo ezahlukeneyo zoshishino.

2. Indima ye-CMC kushishino lokwenza amaphepha
Kwinkqubo yokwenza iphepha, i-CMC isetyenziswa kakhulu njengento yokuncamathelisa, i-thickener kunye ne-stabilizer. Imisebenzi yayo ibandakanya:

2.1 Ukuphucula ukomelela kwephepha
I-CMC inokuphucula ngokufanelekileyo umanyano kunye nokuxinana kwephepha, kwaye iphucule ukuxhathisa ukukrazula kunye nokumelana nokusongwa kwephepha. Indlela yokusebenza kwayo kukwenza iphepha lomelele kwaye lomelele ngakumbi ngokunyusa amandla okudibanisa phakathi kwemicu yepulp.

2.2 Phucula iglosi kunye nokuguda komphezulu wephepha
Ukongeza i-CMC inokuphucula umgangatho wephepha kwaye wenze umphezulu wephepha ube mpuluswa. Iyakwazi ukugcwalisa ngokufanelekileyo izikhewu ebusweni bephepha kunye nokunciphisa uburhabaxa bephepha, ngaloo ndlela iphucula i-gloss kunye nokuprinta ukuguquguquka kwephepha.

2.3 Lawula i-viscosity ye-pulp
Ngexesha lenkqubo yokwenza iphepha, i-CMC inokulawula ngokufanelekileyo i-viscosity ye-pulp kwaye iqinisekise ubumanzi kunye nokufana kwe-pulp. I-viscosity efanelekileyo inceda ukusabalalisa ngokulinganayo i-pulp, ukunciphisa iziphene zephepha, kunye nokuphucula ukusebenza kakuhle kwemveliso.

2.4 Ukuphucula ukugcinwa kwamanzi kwipulp
I-CMC inomthamo olungileyo wokugcina amanzi kwaye inokunciphisa ilahleko yamanzi kwi-pulp ngexesha lenkqubo yokubumba. Oku kunokunciphisa i-shrinkage yephepha kunye neengxaki ze-deformation ezenzeka ngexesha lokumisa, ngaloo ndlela kuphuculwe ukuzinza kwephepha.

3. Ukulungelelaniswa kwe-viscosity ye-CMC
I-viscosity ye-CMC yiparameter ephambili yempembelelo yayo kwinkqubo yokwenza iphepha. Ngokweemfuno ezahlukeneyo zemveliso, i-viscosity ye-CMC inokulungelelaniswa ngokuhlengahlengisa ukugxila kwayo kunye nobunzima bemolekyuli. Ngokukodwa:

3.1 Impembelelo yobunzima bemolekyuli
Ubunzima bemolekyuli yeCMC inefuthe elithe ngqo kwi-viscosity yayo. I-CMC enobunzima obukhulu be-molekyuli idla ngokuba ne-viscosity ephezulu, ngoko ke ubunzima be-molecular CMC busetyenziswa kwizicelo ezifuna i-viscosity ephezulu. Ubunzima be-molecular CMC bufanelekile kwizihlandlo ezifuna i-viscosity ephantsi.

3.2 Impembelelo yogxininiso lwesisombululo
Ukugxininiswa kwesisombululo se-CMC yinto ebalulekileyo echaphazela i-viscosity. Ngokubanzi, okukhona iphezulu yoxinzelelo lwesisombululo seCMC, kokukhona i-viscosity yayo. Ke ngoko, kwimveliso yokwenyani, ugxininiso lwesisombululo se-CMC kufuneka luhlengahlengiswe ngokweemfuno ezithile ukufezekisa inqanaba le-viscosity elifunekayo.

4. Imiqathango yokusetyenziswa kwe-CMC
Xa usebenzisa i-CMC kwinkqubo yokwenza iphepha, la manqaku alandelayo kufuneka aqatshelwe:

4.1 Umlinganiselo ochanekileyo
Isixa se-CMC esongeziweyo kufuneka sihlengahlengiswe ngokweemfuno ezithile zephepha. Ukuba kuninzi kufakwe, kunokubangela ukuba i-pulp viscosity ibe phezulu kwaye ichaphazele inkqubo yokuvelisa; ukuba ayanelanga, isiphumo esilindelekileyo sisenokungafezeki.

4.2 Ulawulo lwenkqubo yokupheliswa
I-CMC kufuneka inyibilikiswe emanzini abandayo ukunqanda ukuthotywa ngexesha lokufudumeza. Inkqubo yokupheliswa kufuneka ishukunyiswe ngokupheleleyo ukuqinisekisa ukuba i-CMC ichithwe ngokupheleleyo kwaye inqande ukudityaniswa.

4.3 Impembelelo yexabiso le-pH
Ukusebenza kwe-CMC kuya kuchatshazelwa lixabiso le-pH. Kwimveliso yephepha, uluhlu lwe-pH olufanelekileyo kufuneka lugcinwe ukuqinisekisa isiphumo esihle se-CMC.

I-CMC idlala indima ebalulekileyo kwishishini lokwenza iphepha, kwaye isakhono sayo sohlengahlengiso lwe-viscosity sichaphazela ngokuthe ngqo umgangatho kunye nokusebenza kwephepha. Ngokukhetha ngokufanelekileyo kunye nokusebenzisa i-CMC, ukomelela, ukukhazimla, ukuguda kunye nokusebenza kakuhle kwephepha kunokuphuculwa kakhulu. Nangona kunjalo, kwisicelo sokwenyani, ugxininiso kunye ne-viscosity ye-CMC kufuneka ilungelelaniswe ngokuchanekileyo ngokweemfuno ezithile zemveliso ukuqinisekisa isiphumo sayo esihle.