Hydroxypropylmethylcellulose (HPMC) ni polymer ikora cyane ikomoka kuri selile naturel. Bikunze gukoreshwa mu nganda zitandukanye, harimo imiti, ibiryo, ubwubatsi no kwisiga. Umusaruro wa HPMC urimo ibikoresho fatizo bitandukanye nibikorwa byinshi.
Cellulose:
Inkomoko: Ibikoresho nyamukuru bya HPMC ni selile, karubone nziza cyane iboneka murukuta rwibimera. Inkomoko ikunze kugaragara ya selile yumusaruro wa HPMC ni ibiti, ariko andi masoko nka pamba ya pamba nayo arashobora gukoreshwa.
Gutegura: Cellulose isanzwe ivurwa kugirango ikureho umwanda hanyuma itunganyirizwe muburyo bukwiye kugirango irusheho guhinduka.
Shingiro:
Ubwoko: Hydroxide ya Sodium (NaOH) cyangwa potasiyumu hydroxide (KOH) ikoreshwa nkibanze mugihe cyambere cyo gukora HPMC.
Imikorere: Alkali ikoreshwa mukuvura selile, itera kubyimba no gusenya imiterere yayo. Iyi nzira, yitwa alkalisation, itegura selile kugirango irusheho kwitwara.
Alkali etherifying agent:
Hydroxypropylating agent: Propylene oxyde ikoreshwa mugutangiza amatsinda ya hydroxypropyl mumugongo wa selile. Iyi ntambwe itanga ibisubizo hamwe nibindi byifuzwa kuri selile.
Methylating agents: Methyl chloride cyangwa dimethyl sulfate ikoreshwa mugutangiza amatsinda ya methyl kumiterere ya selile, bityo bikazamura imiterere rusange.
Methylating agent:
Methanol: Methanol ikunze gukoreshwa nkigishishwa kandi gikora muburyo bwa methylation. Ifasha kwinjiza amatsinda ya methyl muminyururu ya selile.
Hydroxypropylating agent:
Okiside ya Propylene: Nibikoresho byingenzi byo kwinjiza amatsinda ya hydroxypropyl muri selile. Imyitwarire hagati ya oxyde ya propylene na selile ibaho mugihe cyagenzuwe.
umusemburo:
Cataliste ya Acide: Cataliseri ya aside, nka acide sulfurike, ikoreshwa mugutezimbere etherification. Bafasha kugenzura igipimo cyibikorwa nibicuruzwa.
Umuti:
Amazi: Amazi akoreshwa kenshi nkumuti mubyiciro bitandukanye byumusaruro. Nibyingenzi mu gushonga reaction no guteza imbere reaction hagati ya selile na etherifying agent.
Kutabogama:
Hydroxide ya Sodium (NaOH) cyangwa hydroxide ya potasiyumu (KOH): ikoreshwa mu guhagarika aside catisale no guhindura pH mugihe cya synthesis.
isuku:
Imfashanyo yo kuyungurura: Ibikoresho bitandukanye byo kuyungurura birashobora gukoreshwa mugukuraho umwanda hamwe nibidakenewe-biva mubivanze bivanze.
Ibikoresho byo kumesa: Gukaraba n'amazi cyangwa andi mashanyarazi bifasha gukuramo imiti isigaye hamwe n umwanda kubicuruzwa byanyuma.
Desiccant:
Kuma umwuka cyangwa ifuru: Nyuma yo kwezwa, ibicuruzwa birashobora kuba umwuka cyangwa ifuru yumye kugirango ikureho ibisigazwa nubushuhe.
Umukozi ushinzwe kugenzura ubuziranenge:
Isesengura Reagents: Reagent zitandukanye zikoreshwa muburyo bwo kugenzura ubuziranenge kugirango ibicuruzwa bya HPMC byuzuze imikorere isabwa.
Umusaruro wa hydroxypropyl methylcellulose urimo guhindura selile ukoresheje urukurikirane rwimiti. Ibikoresho bibisi birimo selile, alkali, agent ya etherifying, catalizator, solvent, agent itabogamye, agent yoza na desiccant, bigira uruhare runini mugikorwa cya synthesis. Imiterere yihariye na reagent zikoreshwa zirashobora gutandukana bitewe nubushake bwifuzwa no gukoresha hydroxypropyl methylcellulose yanyuma.
Igihe cyo kohereza: Ukuboza-21-2023