I-Hydroxypropyl methyl cellulose yahlulwe yaba ziintlobo ezahlukeneyo, kwaye yintoni umahluko ekusetyenzisweni kwayo?
I-HPMC inokwahlulwahlulwa ibe ziintlobo ezikhawulezayo nezishushu. Iimveliso ezikhawulezayo zisasazeka ngokukhawuleza emanzini abandayo kwaye zinyamalale emanzini. Ngeli xesha, ulwelo alunazo iincindi, kuba i-HPMC isasazeka kuphela emanzini kwaye ayinyibiliki ngokwenene. Emva kwemizuzu emi-2 (ixutywa), incindi yolwelo iyanda kancinci, yenze i-colloid emhlophe ebonakalayo nethambileyo. Iimveliso ezinyibilikayo ezishushu zinokusasazeka ngokukhawuleza emanzini ashushu kwaye zinyamalale emanzini ashushu xa zidibene emanzini abandayo. Xa ubushushu buhla bufikelela kubushushu obuthile (ngokobushushu bejeli yemveliso), incindi ibonakala kancinci de kwenziwe i-colloid ebonakalayo nethambileyo.
Ungawugweba njani umgangatho we-hydroxypropyl methyl cellulose ngokulula nangokuqondakalayo?
Ubumhlophe. Nangona ubumhlophe bungenakukwazi ukumisela ukuba kulula na ukusebenzisa i-HPMC, kwaye ukuba kongezwa izinto zokwenza mhlophe kwinkqubo yemveliso, kuya kuchaphazela umgangatho wayo, uninzi lweemveliso ezilungileyo zimhlophe kakuhle.
Ubunzima: ubunzulu be-HPMC buhlala buyi-80 mesh kunye ne-100 mesh, kwaye i-120 mesh incinci. Okukhona ubunzulu buncinci, kokukhona bungcono.
Ukuhanjiswa kokukhanya: emva kokuba i-HPMC ifakwe emanzini ukuze yenze i-colloid ecacileyo, jonga ukuhanjiswa kwayo kokukhanya. Okukhona ukuhanjiswa kokukhanya kukhulu, kokukhona kungcono. Oku kuthetha ukuba akukho zinto zinganyibilikiyo kakhulu kuyo. Ukuhanjiswa kwe-reactor ethe nkqo ngokubanzi kulungile, kwaye okwe-reactor ethe nkqo kubi. Nangona kunjalo, akuthethi ukuba umgangatho we-reactor ethe nkqo ungcono kunowe-reactor ethe nkqo. Kukho izinto ezininzi ezimisela umgangatho wemveliso.
Ubunzima obuthile: okukhona ubunzima obuthile bukhulu, kokukhona bunzima, kokukhona bungcono. Ngokubanzi, kungenxa yokuba umxholo we-hydroxypropyl kuyo uphezulu. Ukuba umxholo we-hydroxypropyl uphezulu, ukugcinwa kwamanzi kungcono.
Ubunzima obuthile: okukhona ubunzima obuthile bukhulu, kokukhona bunzima, kokukhona bungcono. Ngokubanzi, kungenxa yokuba umxholo we-hydroxypropyl kuyo uphezulu. Ukuba umxholo we-hydroxypropyl uphezulu, ukugcinwa kwamanzi kungcono.
Zeziphi iindlela zokunyibilikisa i-hydroxypropyl methyl cellulose?
Zonke iimodeli zingongezwa kwizinto ngendlela yokuxuba eyomileyo;
Xa kufuneka yongezwe ngqo kwisisombululo samanzi kubushushu begumbi, kungcono ukusebenzisa uhlobo lokusasazeka kwamanzi abandayo. Ngokubanzi, ingenziwa ibe nkulu kwimizuzu eli-10-90 emva kokuyidibanisa (ukuxuba)
Iimodeli eziqhelekileyo zinokunyibilikiswa emva kokuxuba nokuchithachitha ngamanzi ashushu, kongezwe amanzi abandayo, kuxutywe kwaye kupholiswe;
Ukuba ukugaywa nokusongwa kwenzeka ngexesha lokunyibilika, kungenxa yokungaxutywa ngokwaneleyo okanye iimodeli eziqhelekileyo zongezwa ngqo emanzini abandayo. Ngeli xesha, kufuneka zivuselelwe ngokukhawuleza.
Ukuba amaqamza enziwa ngexesha lokunyibilika, anokususwa ngokuma iiyure ezi-2-12 (ixesha elithile lixhomekeke ekuqineni kwesisombululo), ukucoca nge-vacuum, ukucinezela kunye nezinye iindlela, okanye ukongeza isixa esifanelekileyo se-defoamer.
Idlala yiphi indima i-hydroxypropyl methyl cellulose ekusetyenzisweni kwe-putty powder, kwaye ingaba ikho na ikhemistri?
Kwi-putty powder, idlala iindima ezintathu: ukuqina, ukugcinwa kwamanzi kunye nokwakhiwa. Ukuqina, i-cellulose inokwenza iqine, idlale indima yokuxhoma, igcine isisombululo sihambelana phezulu nasezantsi, kwaye imelane nokuwa. Ukugcinwa kwamanzi: yenza i-putty powder yome kancinci, kwaye incede i-calcium yelayimu ukuba isabele phantsi kwesenzo samanzi. Ukwakhiwa: i-cellulose inefuthe lokuthambisa, elinokwenza i-putty powder isebenze kakuhle. I-HPMC ayithathi nxaxheba kuyo nayiphi na i-chemical reaction, kodwa idlala indima yokuncedisa kuphela.
Ingakanani iqondo lobushushu bejeli ye-hydroxypropyl methyl cellulose enxulumene nayo?
Ubushushu bejeli ye-HPMC bunxulumene nomxholo wayo we-methoxyl. Okukhona umxholo we-methoxyl uphantsi, kokukhona ubushushu bejeli buphezulu.
Ingaba kukho ulwalamano phakathi kokuwa kwe-putty powder kunye ne-hydroxypropyl methyl cellulose?
Ibalulekile!!! I-HPMC ayinamanzi aneleyo, nto leyo eya kubangela ukulahleka komgubo.
Ukusetyenziswa kwe-hydroxypropyl methyl cellulose kwi-putty powder, yintoni isizathu sokuba kubekho amaqamza kwi-putty powder?
I-HPMC idlala indima ezintathu kumgubo we-putty: ukuqina, ukugcinwa kwamanzi kunye nokwakhiwa kwawo. Izizathu zokubakho kwamaqamza zezi zilandelayo:
Amanzi amaninzi kakhulu ayongezwa.
Ukuba ukrwela olunye umaleko kumgca ongaphantsi ngaphambi kokuba wome, kulula nokuwenza ube namadyungudyungu.
Ixesha lokuthumela: Sep-27-2022