Ukunyibilika kunye ne-viscosity ye-HEC cellulose kwiingubo ezisekelwe emanzini

Inkcazo:

Kwiminyaka yakutshanje, iingubo ezisekelwe emanzini zifumene ingqwalasela ebanzi ngenxa yobuhlobo babo bendalo kunye nomxholo ophantsi we-volatile organic compound (VOC). I-Hydroxyethylcellulose (HEC) isetyenziswa ngokubanzi i-polymer e-soluble yamanzi kule miqulu, isebenza njenge-thickener yokwandisa i-viscosity kunye nokulawula i-rheology.

Yazisa:

1.1 Imvelaphi:

Iingubo ezisekelwe emanzini ziye zaba yindlela ehambelana nokusingqongileyo kwiingubo zemveli ezisekwe kwi-solvent, ukusombulula iingxaki ezinxulumene nokukhutshwa kwekhompawundi ye-organic eguquguqukayo kunye nefuthe lokusingqongileyo. I-Hydroxyethylcellulose (HEC) yi-derivative ye-cellulose eyona nto iphambili ekuqulunqeni iingubo ezisekelwe emanzini kwaye inika ulawulo lwe-rheology kunye nokuzinza.

1.2 Iinjongo:

Eli nqaku lijolise ekucaciseni iimpawu zokunyibilika kwe-HEC kwiingubo ezisekelwe emanzini kunye nokufunda impembelelo yezinto ezahlukeneyo kwi-viscosity yayo. Ukuqonda le miba kubalulekile ekwandiseni imixube yokwambathisa kunye nokuphumeza umsebenzi ofunekayo.

I-Hydroxyethylcellulose (HEC):

2.1 Ulwakhiwo kunye nokusebenza:

I-HEC i-derivative cellulose derivative efunyenwe yi-etherification reaction ye-cellulose kunye ne-ethylene oxide. Ukuqaliswa kwamaqela e-hydroxyethyl kwi-backbone ye-cellulose igalelo kwi-solubility yayo yamanzi kwaye yenza i-polymer exabisekileyo kwiinkqubo ezisekelwe emanzini. Ubume bemolekyuli kunye neempawu ze-HEC ziya kuxoxwa ngokubanzi.

Ukunyibilika kwe-HEC emanzini:

3.1 Izinto ezichaphazela ukunyibilika:

Ukunyibilika kwe-HEC emanzini kuchatshazelwa zizinto ezininzi, kubandakanya ubushushu, i-pH, kunye noxinzelelo. Ezi zinto kunye neempembelelo zabo kwi-HEC yokunyibilika ziya kuxoxwa, zibonelela ngengqiqo kwiimeko ezithanda ukuchithwa kwe-HEC.

3.2 Umda wokunyibilika:

Ukuqonda imida ye-solubility ephezulu kunye nesezantsi ye-HEC emanzini kubalulekile ekuqulunqeni iingubo kunye nokusebenza kakuhle. Eli candelo liza kuphonononga kuluhlu loxinaniso apho i-HEC ibonisa ukunyibilika okuphezulu kunye neziphumo zokudlula le mida.

Ukuphucula i-viscosity nge-HEC:

4.1 Indima ye-HEC kwi-viscosity:

I-HEC isetyenziswe njenge-thickener kwiingubo ezisekelwe emanzini ukunceda ukwandisa i-viscosity kunye nokuphucula ukuziphatha kwe-rheological. Iinkqubo apho i-HEC ifezekisa ulawulo lwe-viscosity iya kuphononongwa, igxininise ukusebenzisana kwayo kunye neamolekyu zamanzi kunye nezinye izithako kwi-coating formulation.

4.2 Impembelelo yefomula eguquguqukayo kwi-viscosity:

Iinguqu ezahlukeneyo zokuqulunqa, kubandakanywa ukugxilwa kwe-HEC, izinga lokushisa, kunye nesantya se-shear, kunokuchaphazela kakhulu i-viscosity yeengubo zamanzi. Eli candelo liza kuhlalutya impembelelo yezi ziguquko kwi-viscosity ye-HEC-equlethe iingubo zokubonelela ngeembono eziphathekayo kubaqulunqi.

Izicelo kunye nezinto ezilindelekileyo kwixesha elizayo:

5.1 Izicelo zemizi-mveliso:

I-HEC isetyenziswa ngokubanzi kwizicelo ezahlukeneyo zemizi-mveliso ezinjengepeyinti, izinto zokuncamathelisa kunye nezitywina. Eli candelo liza kuqaqambisa igalelo elithile le-HEC kwiityabu eziphuma emanzini kwezi zicelo kwaye lixoxe ngeenzuzo zalo ngaphezu kwezinye ii-thickeners.

5.2 Imiyalelo yophando lwexesha elizayo:

Njengoko imfuno ezinzileyo kunye nomgangatho ophezulu wokutyabeka iqhubeka ikhula, izikhokelo zophando kwixesha elizayo kwintsimi ye-HEC-based formulations ziya kuphononongwa. Oku kunokubandakanya iinguqulelo ezintsha kuhlengahlengiso lwe-HEC, ubuchule bokuyila inoveli, kunye neendlela eziphucukileyo zokuchaza abalinganiswa.

ukuququmbela:

Ukushwankathela iziphumo eziphambili, eli candelo liza kugxininisa ukubaluleka kwe-solubility kunye nokulawulwa kwe-viscosity kwiingubo zamanzi usebenzisa i-HEC. Eli nqaku liza kugqiba ngeempembelelo ezisebenzayo kubaqulunqi kunye neengcebiso zophando olongezelelweyo ukuphucula ukuqonda kwe-HEC kwiinkqubo zamanzi.