Ukunyibilika kunye nokuxinana kwe-HEC cellulose kwiingubo ezisekelwe emanzini

Isishwankathelo:

Kwiminyaka yakutshanje, iingubo ezisekelwe emanzini zifumene ingqalelo enkulu ngenxa yobuhlobo bazo nokusingqongileyo kunye nomxholo we-volatible organic compound (VOC) ophantsi. I-Hydroxyethylcellulose (HEC) yipolymer enyibilikayo emanzini esetyenziswa kakhulu kwezi fomyula, esebenza njengesithambisi sokwandisa i-viscosity kunye nokulawula i-rheology.

yazisa:

1.1 Imvelaphi:

Iingubo ezisekelwe emanzini ziye zaba yindlela enobuhlobo nokusingqongileyo kuneengubo zemveli ezisekelwe kwisinyibilikisi, zisombulula iingxaki ezinxulumene nokukhutshwa kweekhemikhali eziphilayo eziguquguqukayo kunye nempembelelo yokusingqongileyo. I-Hydroxyethylcellulose (HEC) sisixhobo esiphuma kwi-cellulose esisithako esiphambili ekwenzeni iingubo ezisekelwe emanzini kwaye sibonelela ngolawulo lwe-rheology kunye nozinzo.

1.2 Iinjongo:

Eli nqaku lijolise ekucaciseni iimpawu zokunyibilika kwe-HEC kwiingubo ezisekelwe emanzini kunye nokufunda impembelelo yezinto ezahlukeneyo kwi-viscosity yayo. Ukuqonda ezi zinto kubalulekile ekuphuculeni ukwakheka kwengubo kunye nokufezekisa ukusebenza okufunekayo.

I-Hydroxyethylcellulose (HEC):

2.1 Ulwakhiwo kunye nokusebenza:

I-HEC yi-cellulose derivative efunyenwe yi-etherification reaction ye-cellulose kunye ne-ethylene oxide. Ukungeniswa kwamaqela e-hydroxyethyl kwi-cellulose backbone kunegalelo ekunyibilikeni kwamanzi kwaye kuyenza ibe yi-polymer exabisekileyo kwiinkqubo ezisekelwe emanzini. Ulwakhiwo lweemolekyuli kunye neempawu ze-HEC kuza kuxoxwa ngazo ngokweenkcukacha.

Ukunyibilika kwe-HEC emanzini:

3.1 Izinto ezichaphazela ukunyibilika:

Ukunyibilika kwe-HEC emanzini kuchatshazelwa zizinto ezininzi, kuquka ubushushu, i-pH, kunye noxinzelelo. Ezi zinto kunye nempembelelo yazo ekunyibilikeni kwe-HEC kuya kuxoxwa ngazo, kunikwe ulwazi ngeemeko ezivumela ukunyibilika kwe-HEC.

3.2 Umda wokunyibilika:

Ukuqonda imida yokunyibilika ephezulu nesezantsi ye-HEC emanzini kubalulekile ekwenzeni iingubo ezisebenza kakuhle. Eli candelo liza kujonga uluhlu loxinzelelo apho i-HEC ibonisa ukunyibilika okuphezulu kunye nemiphumo yokudlula le mida.

Yandisa i-viscosity nge-HEC:

4.1 Indima ye-HEC kwi-viscosity:

I-HEC isetyenziswa njengesithambisi kwiingubo ezisekelwe emanzini ukunceda ukwandisa i-viscosity kunye nokuphucula ukuziphatha kwe-rheological. Iindlela i-HEC efikelela ngazo kulawulo lwe-viscosity ziya kujongwa, kugxininiswe ukusebenzisana kwayo neemolekyuli zamanzi kunye nezinye izithako kwifomyula yengubo.

4.2 Impembelelo yeenguqu zefomula kwi-viscosity:

Iinguqu ezahlukeneyo zokwenziwa, kuquka uxinaniso lwe-HEC, ubushushu, kunye nesantya sokucheba, zinokuchaphazela kakhulu ukuxinana kweengubo ezisetyenziswa emanzini. Eli candelo liza kuhlalutya impembelelo yezi zinto ziguquguqukayo kwi-viscosity yeengubo eziqulethe i-HEC ukuze kubonelelwe ngengqiqo esebenzayo kubaqulunqi.

Izicelo kunye namathuba exesha elizayo:

5.1 Izicelo zoshishino:

I-HEC isetyenziswa kakhulu kwizicelo ezahlukeneyo zoshishino ezifana neepeyinti, izincamathelisi kunye nezitywini. Eli candelo liza kugxininisa igalelo elithile le-HEC kwiingubo ezisetyenziswa emanzini kwezi zicelo kwaye lixoxe ngeengenelo zalo kunezinye izinyibilikisi.

5.2 Izikhokelo zophando lwexesha elizayo:

Njengoko imfuno yeengubo ezizinzileyo nezisebenza kakuhle iqhubeka nokukhula, kuya kujongwa iindlela zophando zexesha elizayo kwicandelo leefomyula ezisekelwe kwi-HEC. Oku kungabandakanya izinto ezintsha ekuguqulweni kwe-HEC, iindlela ezintsha zokwenza, kunye neendlela eziphambili zokuchonga.

ukuququmbela:

Ukushwankathela iziphumo eziphambili, eli candelo liza kugxininisa ukubaluleka kokunyibilika kunye nolawulo lwe-viscosity kwiingubo ezisetyenziswa emanzini kusetyenziswa i-HEC. Eli nqaku liza kuqukumbela ngeziphumo ezisebenzayo kubaqulunqi kunye neengcebiso zophando olongezelelekileyo ukuphucula ukuqonda kwe-HEC kwiinkqubo ezisetyenziswa emanzini.