Kwilizwe lemichiza, kukho iikhompawundi ezininzi ezineepropathi ezifanayo kodwa zahlukile kwizicelo zazo. Omnye umzekelo yi-hydroxypropyl methylcellulose (HPMC) kunye ne-hydroxyethyl cellulose (HEC). Ezi zimbini ze-cellulose derivatives zisetyenziswa ngokubanzi kumashishini ahlukeneyo, kodwa ukuqonda iimpawu zabo ezizodwa kubalulekile ekukhetheni i-derivative efanelekileyo kwisicelo esithile.
IHydroxypropyl methylcellulose, eyaziwa njenge-HPMC, yinto ephuma kwi-cellulose eyenziweyo. Ifunyenwe ngokuphatha i-cellulose yendalo kunye nepropylene oxide kunye ne-methyl chloride, kunye nokwazisa i-hydroxypropyl kunye namaqela e-methyl ngokulandelanayo. Olu hlengahlengiso luphucula ukunyibilika kwamanzi kwiselulosi kwaye kuphuculwe iipropati zayo zonke. Ngakolunye uhlangothi, i-hydroxyethyl cellulose (HEC) nayo i-cellulose derivative efunyenwe ngokusabela kwe-cellulose yendalo kunye ne-ethylene oxide. Ukuqaliswa kwamaqela e-hydroxyethyl kubangela ukunyibilika kwamanzi okwandisiweyo kunye neempawu ezityebileyo.
Omnye umahluko ophambili phakathi kwe-HPMC kunye ne-HEC ziindawo zabo zesicelo. I-HPMC inoluhlu olubanzi lokusetyenziswa kushishino lokwakha. Isetyenziswa ngokubanzi njenge-thickener kwiimveliso ezisekelwe kwi-samente ezifana ne-adhesives ye-tile, i-disk mix mortars kunye ne-self-leveling compounds. Ngenxa yeempawu zayo zokugcina amanzi, i-HPMC iphucula ukusebenza, ukunamathela kunye nokuqina kwezi zixhobo zokwakha. Ukongeza, i-HPMC isetyenziswa njenge-ejenti yokwenza ifilimu kwiingubo kunye neepeyinti, ibonelela ngokugqwesa ukuxhathisa kwamanzi kunye neglosi.
I-HEC, ngakolunye uhlangothi, isetyenziselwa ukunyamekela komntu kunye nezithambiso. Isetyenziswa njenge-thickener, emulsifier kunye ne-stabilizer kwi-creams, lotions, ishampu kunye nezinye iimveliso zobuhle. I-HEC iphakamisa i-viscosity yale fomyula, okubangela ukuthungwa okungcono, ukusasazeka kunye nokusebenza kwemveliso jikelele. Ubuchule bayo bokwenza ifilimu bukwayenza ibe sisithako esifanelekileyo kwiijeli zeenwele kunye nemousses, ibonelela ngokubamba ixesha elide ngaphandle kokuncamathela.
Omnye umahluko obalulekileyo luluhlu lwe-viscosity yezi khompawundi. I-HPMC ngokubanzi ine-viscosity ephezulu kune-HEC. Lo mahluko we-viscosity wenza i-HEC ifaneleke ngakumbi kwizicelo ezifuna ukusebenza kokuqina okuphantsi ukuya kokuphakathi. I-HEC ibonelela ngokugqwesileyo kozinzo kunye nolawulo lokuhamba kwindlela yolwelo, iqinisekisa nokuba usasazo lwezithako ezisebenzayo. I-viscosity ephezulu ye-HPMC, kwelinye icala, iyenza ilungele izicelo ezifuna ukujiya okuphakathi ukuya kokuphezulu, okufana nemathiriyeli yokwakha.
Ukongeza, i-HPMC kunye ne-HEC ziyahluka ngokuhambelana kwazo nezinye izithako zekhemikhali. I-HPMC inokuhambelana okugqwesileyo kunye noluhlu olubanzi lwezongezo kunye nokunyamezela okulungileyo kwiityuwa kunye ne-surfactants, iyenza ibe yinto eguquguqukayo kwiintlobo ezahlukeneyo zokwenziwa. I-HEC, ngelixa ngokubanzi iyahambelana nezithako ezininzi, inokuba nemiba ethile yokuhambelana neetyuwa ezithile, i-acids, kunye ne-surfactants. Ngoko ke, xa ukhetha phakathi kwe-HPMC kunye ne-HEC, kubalulekile ukuqwalasela iimfuno zokuhambelana koqulunqo oluthile.
Isishwankathelo, i-HPMC kunye ne-HEC, njenge-cellulose derivatives, ineempawu zabo ezizodwa kunye nokusetyenziswa. Ukuqonda umahluko phakathi kwezi zixhobo kubalulekile ekukhetheni i-compound efanelekileyo kwisicelo esithile. I-HPMC isetyenziswa ngokubanzi kushishino lokwakha njenge-thickener kunye ne-agent-forming agent, ngelixa i-HEC isetyenziswa kakhulu kwiimveliso zokhathalelo lomntu njenge-thickener kunye ne-stabilizer. Ngokuqwalasela iimfuno ze-viscosity kunye nokuhambelana nezinye izithako, i-derivative ye-cellulose efanelekileyo kakhulu inokukhethwa, iqinisekisa ukusebenza kakuhle kunye neziphumo ezifunwayo kwimveliso yokugqibela.
Enkosi ngentsebenziswano yakho neJINJI CHEMICAL.
Ixesha lokuposa: Nov-14-2023