Ii-ether ze-cellulose kunye nendlela yokwenza okufanayo

Imveliso yeii-ether ze-celluloseibandakanya uthotho lweenguqu zeekhemikhali kwi-cellulose, nto leyo ephumela kwi-derivatives ezineempawu ezizodwa. Oku kulandelayo sisishwankathelo ngokubanzi seendlela ezisetyenziswayo ukuvelisa ii-ether ze-cellulose:

1. Ukukhethwa koMthombo weCellulose:

• Ii-cellulose ethers zinokufunyanwa kwimithombo eyahlukeneyo efana ne-wood pulp, i-cotton linters, okanye ezinye izinto ezisekwe kwizityalo. Ukukhethwa komthombo we-cellulose kunokuchaphazela iimpawu zemveliso yokugqibela ye-cellulose ether.

2. Ukutsalwa kwesisu:

• Umthombo weselulose udlula kwi-pulping ukuze kuqhekeke imicu ibe yindlela elawulekayo. I-pulping inokufezekiswa ngokusebenzisa iindlela zombane, iikhemikhali, okanye indibaniselwano yazo zombini ezi ndlela.

3. Ukuhlanjululwa:

• I-pulped cellulose ihlanjululwa ukuze kususwe ukungcola, i-lignin, kunye nezinye izinto ezingezizo ii-cellulosic. Ukucoca kubalulekile ukuze kufunyanwe izinto ze-cellulose ezikumgangatho ophezulu.

4. Ukusebenza kweCellulose:

• I-cellulose ecociweyo iyasebenza ngokuyidumba kwisisombululo se-alkaline. Eli nyathelo libalulekile ekwenzeni i-cellulose isebenze ngakumbi ngexesha le-etherification reaction elandelayo.

5. Impendulo ye-Etherification:

• I-activated cellulose idlula kwi-etherification, apho amaqela e-ether aziswa kumaqela e-hydroxyl kwi-cellulose polymer chain. Ii-etherifying agents eziqhelekileyo ziquka i-ethylene oxide, i-propylene oxide, i-sodium chloroacetate, i-methyl chloride, kunye nezinye.
• I-reaction idla ngokuqhutywa phantsi kweemeko ezilawulwayo zobushushu, uxinzelelo, kunye ne-pH ukuze kufezekiswe inqanaba elifunekayo lokutshintshwa (DS) kunye nokuphepha ii-reactions ezingalindelekanga.

6. Ukungathathi cala kunye nokuHlamba:

• Emva kwe-etherification reaction, imveliso idla ngokususwa ukuze kususwe izinto ezingafunekiyo okanye ezinye izinto ezingafunekiyo. Amanyathelo okuhlamba alandelayo ayenziwa ukuze kususwe iikhemikhali eziseleyo kunye nokungcola.

7. Ukomisa:

• I-cellulose ecociweyo neyomileyo iyomiswa ukuze kufunyanwe imveliso yokugqibela ye-cellulose ether kwimo yomgubo okanye i-granular.

8. Ulawulo loMgangatho:

• Iindlela ezahlukeneyo zokuhlalutya, kuquka i-nuclear magnetic resonance (NMR) spectroscopy, i-Fourier-transform infrared (FTIR) spectroscopy, kunye ne-chromatography, zisetyenziswa ukulawula umgangatho. I-DS ijongwa ngokusondeleyo ukuqinisekisa ukuhambelana.

9. Ukwenziwa kunye nokusetyenziswa:

• Emva koko i-cellulose ether yenziwa ngamabakala ahlukeneyo ukuze ihlangabezane neemfuno ezithile zezicelo ezahlukeneyo. Ii-cellulose ethers ezahlukeneyo zifanelekile kumashishini ahlukeneyo, njengokwakha, amayeza, ukutya, izinto zokugquma, nokunye.

Kubalulekile ukuqaphela ukuba iindlela ezithile kunye neemeko zinokuhluka ngokusekwe kwimveliso ye-cellulose ether efunekayo kunye nokusetyenziswa okucetywayo. Abavelisi badla ngokusebenzisa iinkqubo ezizimeleyo ukuvelisa ii-cellulose ethers ezineempawu ezithile ezenzelwe ukuhlangabezana neemfuno zamashishini ahlukeneyo.