HPMC eroja

Hydroxypropyl Methylcellulose (HPMC) jẹ ether cellulose ti o wa lati inu cellulose adayeba, nipataki igi tabi owu, nipasẹ awọn ilana kemikali kan.Eyi ni awotẹlẹ ti awọn eroja ati awọn ohun-ini ti HPMC:

1. Cellulose: Cellulose ni akọkọ eroja ni HPMC.O jẹ polysaccharide ti o nwaye nipa ti ara ti o ni awọn iwọn glukosi atunwi ti a so pọ ni awọn ẹwọn gigun.Cellulose ṣe iranṣẹ bi ẹhin ti HPMC ati pese iduroṣinṣin igbekalẹ.
2. Methylation: Egungun cellulose ti wa ni iyipada ti kemikali nipasẹ ilana ti a npe ni methylation, nibiti methyl chloride ti ṣe atunṣe pẹlu cellulose ni iwaju alkali lati ṣafihan awọn ẹgbẹ methyl (-CH3) lori pq cellulose.Ilana methylation yii jẹ pataki fun igbelaruge omi solubility ati awọn ohun-ini miiran ti cellulose.
3. Hydroxypropylation: Ni afikun si methylation, awọn ẹgbẹ hydroxypropyl (-CH2CHOHCH3) le tun ṣe afihan si pq cellulose nipasẹ hydroxypropylation.Eyi tun ṣe atunṣe awọn ohun-ini ti cellulose, imudarasi idaduro omi rẹ, agbara ṣiṣẹda fiimu, ati awọn abuda miiran.
4. Etherification: Ifihan ti methyl ati awọn ẹgbẹ hydroxypropyl sori pq cellulose ni a mọ ni etherification.Etherification paarọ awọn kemikali be ti cellulose, Abajade ni awọn Ibiyi ti HPMC pẹlu oto-ini dara fun orisirisi awọn ohun elo.
5. Awọn ohun-ini ti ara: HPMC jẹ deede funfun si funfun, ailarun, ati lulú ti ko ni itọwo.O jẹ tiotuka ninu omi tutu ati awọn fọọmu ko o tabi die-die turbid awọn solusan da lori ifọkansi ati ite.HPMC ṣe afihan idaduro omi ti o dara julọ, ti o nipọn, ti n ṣe fiimu, ati awọn ohun-ini iṣẹ ṣiṣe dada, ti o jẹ ki o niyelori ni ọpọlọpọ awọn ile-iṣẹ, pẹlu ikole, awọn oogun, ounjẹ, ati awọn ohun ikunra.

Iwoye, awọn eroja akọkọ ti o wa ninu HPMC jẹ cellulose, methyl chloride (fun methylation), ati propylene oxide (fun hydroxypropylation), pẹlu awọn ohun elo alkali ati awọn afikun miiran ti a lo ninu ilana iṣelọpọ.Awọn eroja wọnyi faragba awọn aati kemikali lati gbejade HPMC pẹlu awọn ohun-ini kan pato ti a ṣe deede lati pade awọn ibeere ti awọn ohun elo oriṣiriṣi.