IHydroxypropyl methyl cellulose yahlulwe yaziindidi ezininzi, kwaye yintoni umahluko ekusebenziseni kwayo?
I-HPMC inokohlulwa ibe ziindidi ezinyibilikayo ngoko nangoko kunye nezishushu. Iimveliso ezikhawulezayo zisasazeka ngokukhawuleza emanzini abandayo kwaye zinyamalale emanzini. Ngeli xesha, ulwelo akukho viscosity, kuba HPMC isasazwe kuphela emanzini kwaye ayinyibiliki ngokwenene. Emva kwemizuzu emi-2 (ukuvuselela), i-viscosity yolwelo iyanda ngokukhawuleza, yenze i-colloid emhlophe emhlophe. Iimveliso ezishushu ezinyibilikayo zinokusasazeka ngokukhawuleza emanzini ashushu kwaye zinyamalale emanzini ashushu xa zidityanisiwe kumanzi abandayo. Xa iqondo lokushisa lihla kwiqondo elithile lobushushu (ngokwejeli yobushushu bemveliso), i-viscosity ibonakala ngokukhawuleza de i-colloid ebonakalayo ebonakalayo yenziwe.
Ungawugweba njani umgangatho we-hydroxypropyl methyl cellulose ngokulula nangokucacileyo?
Ubumhlophe. Nangona ubumhlophe bungenako ukugqiba ukuba ngaba i-HPMC kulula ukuyisebenzisa, kwaye ukuba ii-arhente ezimhlophe zongezwa kwinkqubo yokuvelisa, iya kuchaphazela umgangatho wayo, uninzi lweemveliso ezilungileyo zinobumhlophe obuhle.
Ukulunga: ukucoleka kwe-HPMC ngokuqhelekileyo yi-80 mesh kunye ne-100 mesh, kunye ne-120 mesh ingaphantsi. Okukhona ukucoleka, kokukhona kungcono.
Ukuhanjiswa kokukhanya: emva kokuba i-HPMC ifakwe emanzini ukwenza i-colloid ebonakalayo, jonga ukukhanya kwayo. Okukhona ukuhanjiswa kokukhanya, kokukhona kungcono. Kuthetha ukuba kukho izinto ezincinci ezinganyibilikiyo kuyo. Ugqithiso lwereactor ethe nkqo lulungile gabalala, kwaye leyo yereactor ethe tye imbi kakhulu. Nangona kunjalo, ayithethi ukuba umgangatho wereactor othe nkqo ungcono kunowo wereactor ethe tye. Kukho izinto ezininzi ezimisela umgangatho wemveliso.
Umxhuzulane okhethekileyo: ubukhulu bobunzima obuthile buba bukhulu ngakumbi, bungcono ngakumbi. Ngokuqhelekileyo, kungenxa yokuba umxholo we-hydroxypropyl kuwo uphezulu. Ukuba umxholo we-hydroxypropyl uphezulu, ukugcinwa kwamanzi kungcono.
Umxhuzulane okhethekileyo: ubukhulu bobunzima obuthile buba bukhulu ngakumbi, bungcono ngakumbi. Ngokuqhelekileyo, kungenxa yokuba umxholo we-hydroxypropyl kuwo uphezulu. Ukuba umxholo we-hydroxypropyl uphezulu, ukugcinwa kwamanzi kungcono.
zithini iindlela zokuchithwa kwe-hydroxypropyl methyl cellulose?
Zonke iimodeli zingongezwa kwizinto eziphathekayo ngendlela yokuxuba okomileyo;
Xa kufuneka ifakwe ngokuthe ngqo kwisisombululo samanzi kwindawo yokushisa, kungcono ukusebenzisa uhlobo lokusasazwa kwamanzi abandayo. Ngokubanzi, inokugqithwa ngaphakathi kwemizuzu eyi-10-90 emva kokongeza (ukuvuselela)
Iimodeli eziqhelekileyo zinokuchithwa emva kokuxuba kunye nokusabalalisa ngamanzi ashushu, ukongeza amanzi abandayo, ukuvuselela nokupholisa;
Ukuba i-caking kunye nokugubungela kwenzeka ngexesha lokuchithwa, kungenxa yokuxuba okungonelanga okanye iimodeli eziqhelekileyo zongezwa ngokuthe ngqo kumanzi abandayo. Ngeli xesha, kufuneka ixutywe ngokukhawuleza.
Ukuba iibhubhu zenziwe ngexesha lokuchithwa, zinokususwa ngokuma kwiiyure ezingama-2-12 (ixesha elithile lixhomekeke ekulungelelaniseni isisombululo), ukucoca, ukuxinzelela kunye nezinye iindlela, okanye ukongeza inani elifanelekileyo le-defoamer.
Iyiphi indima eyenziwa yi-hydroxypropyl methyl cellulose ekusebenziseni i-putty powder, kwaye ingaba kukho i-chemistry?
Kwi-putty powder, idlala iindima ezintathu: ukuqina, ukugcinwa kwamanzi kunye nokwakhiwa. Ukujiya, i-cellulose inokujiya, idlale indima yokunqunyanyiswa, igcine isicombululo sifana phezulu nasezantsi, kwaye sixhathise ukuwohloka. Ukugcinwa kwamanzi: yenza umgubo weputty wome kancinane, kwaye uncedise i-lime calcium ukuba isabele phantsi kwentshukumo yamanzi. Ukwakhiwa: i-cellulose inefuthe lokuthambisa, elinokwenza i-putty powder ibe nokusebenza kakuhle. I-HPMC ayithathi nxaxheba kuyo nayiphi na i-chemical reaction, kodwa idlala indima encedisayo kuphela.
Yintoni enxulumene nobushushu bejeli ye-hydroxypropyl methyl cellulose?
Ubushushu bejeli ye-HPMC inxulumene nomxholo wayo we-methoxyl. Ukunciphisa umxholo we-methoxyl, uphezulu ubushushu bejeli.
ngaba kukho ubudlelwane phakathi kokulahla i-putty powder kunye ne-hydroxypropyl methyl cellulose?
Ibalulekile!!! I-HPMC inokugcinwa kwamanzi okungalunganga, okuya kubangela ukulahlekelwa ngumgubo.
Ukusetyenziswa kwe-hydroxypropyl methyl cellulose kwi-putty powder, yintoni isizathu se-bubbles kwi-putty powder?
I-HPMC idlala iindima ezintathu kwi-putty powder: ukuqina, ukugcinwa kwamanzi kunye nokwakhiwa. Izizathu zamaqamza zezi zilandelayo:
Kongezwa amanzi amaninzi kakhulu.
Ukuba ukrwela omnye umaleko kumaleko asezantsi phambi kokuba wome, kulula nokudubuleka.
Ixesha lokuposa: Sep-27-2022