Ilana kemikali ti awọn itọsẹ ether cellulose

Awọn ethers Cellulose jẹ awọn itọsẹ ti cellulose, polysaccharide adayeba ti a rii ninu awọn odi sẹẹli ti awọn irugbin. 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.