Habka Wax-soo-saarka ee Hydroxypropyl Methyl Cellulose
Hydroxypropyl Methylcellulose (HPMC) waxaa caadi ahaan lagu soo saaraa falcelin kiimiko oo taxane ah oo ku lug leh cellulose, propylene oxide, iyo methyl chloride. Habka wax-soo-saarka waxaa lagu soo koobi karaa sida soo socota:
1. Isha Cellulose:
- Alaabta aasaasiga ah ee wax soo saarka HPMC waa cellulose, kaas oo laga soo saari karo saxarka alwaax, suufka suufka, ama ilo kale oo ku salaysan dhirta. Cellulose waa la nadiifiyaa oo la sifeeyaa si looga saaro wasakhda iyo lignin.
2. Falcelinta Etherification:
- Cellulose waxa ay martaa etherification leh propylene oxide iyo methyl chloride iyadoo ay joogaan kiciyayaal alkali ah sida sodium hydroxide ama potassium hydroxide. Dareen-celintani waxay soo bandhigaysaa hydroxypropyl iyo kooxaha methyl ee laf dhabarta cellulose, taasoo keentay samaynta HPMC.
3. Dhexdhexaadinta iyo Dhaqidda:
- Falcelinta etherification ka dib, HPMC-ga cayriin waxaa lagu dhex milmay aashito si loo demiyo kicinta oo loo hagaajiyo pH-ga. Alaabta ayaa markaa dhowr jeer lagu dhaqaa biyo si meesha looga saaro alaabta ka soo baxda, reageyaasha aan la falcelinin, iyo kiciyayaasha hadhaaga ah.
4. Nadiifinta iyo Qalajinta:
- HPMC-da la dhaqay waxaa lagu sii sifeeyaa hababka sida sifeynta, centrifugation, iyo qalajinta si looga saaro biyaha xad dhaafka ah iyo wasakhda. HPMC-da la safeeyey waxa laga yaabaa in lagu sameeyo daawayn dheeraad ah si loo gaadho darajooyin gaar ah iyo guryaha la rabo.
5. Shiidida iyo Cabbiraadda (Ikhtiyaar):
- Xaaladaha qaarkood, HPMC-ga la qalajiyey waxaa laga yaabaa in lagu shubo budo wanaagsan waxaana loo kala saarayaa qaybinta cabbirka qaybo kala duwan oo ku salaysan codsiga loogu talagalay. Talaabadani waxay hubinaysaa isku mid ahaanshaha iyo joogteynta badeecada ugu dambeysa.
6. Baakadaha iyo Kaydinta:
- HPMC-da la dhammeeyey waxa lagu shubaa weelal ama bacaha ku habboon gaadiidka iyo kaydinta. Baakadaha saxda ah waxay ka caawisaa ka hortagga wasakhda iyo nuugista qoyaanka, hubinta tayada iyo xasiloonida alaabta inta lagu jiro kaydinta iyo maaraynta.
Xakamaynta tayada
- Inta lagu jiro habka wax soo saarka, tillaabooyin xakameynta tayada adag ayaa lafuliyaa si loo hubiyo nadiifnimada, joogtaynta, iyo waxqabadka alaabta HPMC. Halbeegyada sida viscosity, content qoyaanka, qaybinta cabbirka walxaha, iyo ka kooban yahay kiimikaad ayaa lala socdaa si ay ula kulmaan qeexitaannada iyo heerarka warshadaha.
Tixgelinta Deegaanka:
- Soo saarista HPMC waxay ku lug leedahay falcelinta kiimikaad iyo tillaabooyin habaysan oo kala duwan kuwaas oo dhalin kara qashin ka soo baxa alaabada oo cunta tamar iyo agab. Wax-soo-saarayaashu waxay fuliyaan tillaabooyin lagu yareynayo saameynta deegaanka, sida dib-u-warshadaynta, daaweynta qashinka, iyo hagaajinta waxtarka tamarta.
Guud ahaan, wax soo saarka Hydroxypropyl Methylcellulose (HPMC) waxay ku lug leedahay habab kiimiko oo adag iyo tallaabooyin lagu xakameynayo tayada adag si loo soo saaro alaab tayo sare leh oo joogto ah oo ku habboon codsiyada warshadaha kala duwan.
Waqtiga boostada: Febraayo-16-2024