Ilana kemikali ti awọn itọsẹ ether cellulose

Awọn ethers cellulose jẹ awọn itọsẹ ti cellulose, polysaccharide adayeba ti a ri ninu awọn odi sẹẹli ti awọn eweko. Ilana kemikali ti awọn ethers cellulose jẹ ifihan nipasẹ ifihan ti awọn oriṣiriṣi awọn ẹgbẹ ether nipasẹ iyipada kemikali ti awọn ẹgbẹ hydroxyl (-OH) ti o wa ninu moleku cellulose. Awọn oriṣi ti o wọpọ julọ ti awọn ethers cellulose pẹlu:

1. Hydroxypropyl Methylcellulose (HPMC):
   • Eto:
     • HPMC ti wa ni iṣelọpọ nipasẹ rirọpo awọn ẹgbẹ hydroxyl ti cellulose pẹlu mejeeji hydroxypropyl (-OCH2CHOHCH3) ati awọn ẹgbẹ methyl (-OCH3).
     • Iwọn aropo (DS) tọkasi nọmba apapọ ti awọn ẹgbẹ hydroxyl ti o rọpo fun ẹyọ glukosi ninu pq cellulose.
2. Carboxymethyl Cellulose(CMC):
   • Eto:
     • CMC jẹ iṣelọpọ nipasẹ iṣafihan awọn ẹgbẹ carboxymethyl (-CH2COOH) si awọn ẹgbẹ hydroxyl ti cellulose.
     • Awọn ẹgbẹ carboxymethyl funni ni solubility omi ati ihuwasi anionic si pq cellulose.
3. Hydroxyethyl Cellulose (HEC):
   • Eto:
     • HEC ti wa nipasẹ rirọpo awọn ẹgbẹ hydroxyl ti cellulose pẹlu awọn ẹgbẹ hydroxyethyl (-OCH2CH2OH).
     • O ṣe afihan imudara omi solubility ati awọn ohun-ini ti o nipọn.
4. Methyl Cellulose (MC):
   • Eto:
     • MC jẹ iṣelọpọ nipasẹ iṣafihan awọn ẹgbẹ methyl (-OCH3) si awọn ẹgbẹ hydroxyl ti cellulose.
     • O ti wa ni lilo nigbagbogbo fun idaduro omi rẹ ati awọn ohun-ini iṣelọpọ fiimu.
5. Ethyl Cellulose (EC):
   • Eto:
     • EC ti ṣepọ nipasẹ rirọpo awọn ẹgbẹ hydroxyl ti cellulose pẹlu awọn ẹgbẹ ethyl (-OC2H5).
     • O jẹ mimọ fun ailagbara rẹ ninu omi ati pe a lo nigbagbogbo ni iṣelọpọ awọn aṣọ ati awọn fiimu.
6. Hydroxypropyl Cellulose (HPC):
   • Eto:
     • HPC ti wa nipasẹ iṣafihan awọn ẹgbẹ hydroxypropyl (-OCH2CHOHCH3) si awọn ẹgbẹ hydroxyl ti cellulose.
     • O ti wa ni lo bi a Apapo, fiimu tele, ati iki modifier.

Ẹya kan pato yatọ fun itọsẹ ether cellulose kọọkan ti o da lori iru ati iwọn aropo ti a ṣe afihan lakoko ilana iyipada kemikali. Ifihan ti awọn ẹgbẹ ether wọnyi n funni ni awọn ohun-ini kan pato si ether cellulose kọọkan, ṣiṣe wọn dara fun awọn ohun elo ile-iṣẹ lọpọlọpọ.