Focus on Cellulose ethers

Izizathu zamaqamu kunye nezinto eziluncedo kunye nezingeloncedo zamaqamu ngexesha lokusetyenziswa kweemveliso ze-cellulose ether

Iimveliso ze-cellulose ether ze-HPMC kunye ne-HEMC zinamaqela amabini e-hydrophobic kunye ne-hydrophilic. Iqela le-methoxy li-hydrophobic, kwaye iqela le-hydroxypropoxy lihluke ngokuhambelana nendawo yokutshintsha. Ezinye ziyi-hydrophilic kwaye ezinye ziyi-hydrophobic. IHydroxyethoxy yi-hydrophilic. Into ebizwa ngokuba yi-hydrophilicity ithetha ukuba inepropati yokuba kufuphi namanzi; i-hydrophobicity ithetha ukuba inepropati yokugxotha amanzi. Ekubeni imveliso i-hydrophilic kunye ne-hydrophobic, imveliso ye-cellulose ether inomsebenzi ongaphezulu, odala amaqamza omoya. Ukuba enye kuphela kwiipropati ezimbini i-hydrophilic okanye i-hydrophobic, akukho maqamza aya kuveliswa. Nangona kunjalo, i-HEC ineqela le-hydrophilic kuphela yeqela le-hydroxyethoxy kwaye ayinalo iqela le-hydrophobic, ngoko ayiyi kuvelisa ama-bubbles.

I-bubble phenomenon nayo ihambelana ngokuthe ngqo kwizinga lokuchithwa kwemveliso. Ukuba imveliso inyibilika ngesantya esingahambelaniyo, amaqamu aya kubumba. Ngokuqhelekileyo, i-viscosity ephantsi, ngokukhawuleza isantya sokuchithwa. Ukuphakama kwe-viscosity, isantya sokupheliswa sicotha. Esinye isizathu yinkinga ye-granulation, i-granulation ayilingani (ubukhulu be-particle ayifani, kukho ezinkulu kunye ezincinci). Ibangela ukuba ixesha lokuchithwa lihluke, livelise iqamza lomoya.

Izibonelelo zeebhubhu zomoya zinokunyusa indawo ye-batch scraping, ipropati yokwakha nayo iphuculwe, i-slurry ilula, kwaye i-batch scraping ilula. Ukungalungi kukuba ubukho bamaqamza buya kunciphisa ubuninzi bemveliso, ukunciphisa amandla, kunye nokuchaphazela ukuchasana kwemozulu yezinto.


Ixesha lokuposa: Feb-27-2023
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