Inkqubo yokwenziwa kwe-methyl cellulose ether

Ukwenziwa kwei-methyl cellulose etheribandakanya ukuguqulwa kweekhemikhali zeselulosi ngokusabela kwe-etherification. I-Methyl cellulose (MC) yi-ether ye-cellulose e-soluble yamanzi esetyenziswa ngokubanzi kumashishini ahlukeneyo. Nantsi inkcazo jikelele yenkqubo yokwenziwa kwe-methyl cellulose ether:

1. Ukukhethwa kweSelulosi Umthombo:

• Inkqubo iqala ngokukhethwa komthombo we-cellulose, oqhelekileyo ophuma kwi-pulp yokhuni okanye ikotoni. Umthombo we-cellulose ukhethwa ngokusekelwe kwiimpawu ezifunwayo zemveliso yokugqibela ye-methyl cellulose.

2. Ukutsala:

• Umthombo we-cellulose okhethiweyo wenziwa i-pulping, inkqubo eqhekeza iifibers zibe yifom elawulekayo ngakumbi. I-Pulping inokufezekiswa ngeendlela zoomatshini okanye zekhemikhali.

3. Ukusebenza kweSelulosi:

• I-pulped cellulose iye isebenze ngokuyiphatha ngesisombululo se-alkaline. Eli nyathelo lijolise ekudumbeni imicu yecellulose, ibenze basebenze ngakumbi ngexesha lokusabela kwe-etherification elandelayo.

4. I-Etherification Reaction:

• I-cellulose esebenzayo ingena kwi-etherification, apho amaqela e-ether, kulo mzekelo, amaqela e-methyl, aziswa kumaqela e-hydroxyl kwikhonkco le-polymer cellulose.
• Ukusabela kwe-etherification kubandakanya ukusetyenziswa kwee-agent ze-methylating ezifana ne-sodium hydroxide kunye ne-methyl chloride okanye i-dimethyl sulfate. Iimeko zokusabela, kubandakanywa ubushushu, uxinzelelo, kunye nexesha lokuphendula, zilawulwa ngononophelo ukufezekisa iqondo elifunekayo lokuthatha indawo (DS).

5. Ukungathathi hlangothi kunye nokuHlanjwa:

• Emva kokusabela kwe-etherification, imveliso ingathathi hlangothi ukususa i-alkali engaphezulu. Amanyathelo okuhlamba alandelayo aqhutyelwa ukuphelisa iikhemikhali ezishiyekileyo kunye nokungcola.

6. Ukomisa:

• I-cellulose ecocekileyo kunye ne-methylated yomisiwe ukufumana imveliso ye-methyl cellulose ether yokugqibela ngendlela yepowder okanye i-granules.

7. Ulawulo loMgangatho:

• Ubuchule bokuhlalutya obahlukeneyo, kuqukwa i-nuclear magnetic resonance (NMR) spectroscopy, iFourier-transform infrared (FTIR) spectroscopy, kunye nechromatography, zisetyenziselwe ukulawula umgangatho. Umgangatho wokutshintshwa (DS) yiparameter ebalulekileyo ebekwe esweni ngexesha lemveliso.

8. Uqulunqo kunye nokuPakisha:

• I-methyl cellulose ether iye iqulunqwe ngokwamabakala ahlukeneyo ukuhlangabezana neemfuno ezithile zezicelo ezahlukeneyo. Amabanga ahlukeneyo anokwahluka kwi-viscosity yawo, ubungakanani bamasuntswana, kunye nezinye iipropathi.
• Iimveliso zokugqibela zipakishwe ukuze zisasazwe.

Kubalulekile ukuqaphela ukuba iimeko ezithile kunye nee-reagents ezisetyenziswa kwi-etherification reaction inokwahluka ngokusekelwe kwiinkqubo zobunikazi bomenzi kunye neempawu ezifunwayo zemveliso ye-methyl cellulose. I-Methyl cellulose ifumana izicelo kwishishini lokutya, amayeza, ulwakhiwo, kunye namanye amacandelo ngenxa yokunyibilika kwamanzi kunye nobuchule bokwenza ifilimu.