Inqubo yokwenziwa kwe-methyl cellulose ether

Ukwakhiwa kwei-methyl cellulose etherkuhilela ukuguqulwa kwamakhemikhali e-cellulose ngokusabela kwe-etherification. I-Methyl cellulose (MC) iyi-ether cellulose encibilika emanzini esetshenziswa kabanzi ezimbonini ezahlukahlukene. Nansi ukubuka kabanzi kwenqubo yokwenziwa kwe-methyl cellulose ether:

1. Ukukhethwa Komthombo We-Cellulose:

• Inqubo iqala ngokukhethwa komthombo we-cellulose, ovame ukutholakala ku-pulp yokhuni noma ukotini. Umthombo we-cellulose ukhethwa ngokusekelwe ezicini ezifunwayo zomkhiqizo wokugcina we-methyl cellulose.

2. Ukudonsa:

• Umthombo we-cellulose okhethiwe uthola i-pulping, inqubo ehlukanisa imicu ibe yindlela elawulekayo. I-Pulping ingafinyelelwa ngokusebenzisa izindlela zemishini noma zamakhemikhali.

3. Ukusebenza kweCellulose:

• I-pulped cellulose ibe isisebenza ngokuyiphatha ngesisombululo se-alkaline. Lesi sinyathelo sihlose ukukhukhumeza imicu ye-cellulose, iyenze isebenze kakhulu ngesikhathi sokusabela kwe-etherification okulandelayo.

4. Ukusabela kwe-Etherification:

• I-cellulose ecushiwe idlula i-etherification, lapho amaqembu e-ether, kulokhu, amaqembu e-methyl, ethulwa emaqenjini e-hydroxyl kuketango le-polymer ye-cellulose.
• Ukusabela kwe-etherification kuhilela ukusetshenziswa kwe-methylating agents njenge-sodium hydroxide ne-methyl chloride noma i-dimethyl sulfate. Izimo zokusabela, okuhlanganisa izinga lokushisa, ukucindezela, nesikhathi sokusabela, zilawulwa ngokucophelela ukuze kuzuzwe izinga elifiswayo lokushintshwa (DS).

5. Ukungathathi hlangothi kanye Nokugeza:

• Ngemuva kokusabela kwe-etherification, umkhiqizo uyekwa ukuze kukhishwe i-alkali eningi. Izinyathelo zokugeza ezilandelayo zenziwa ukuze kuqedwe amakhemikhali asele kanye nokungcola.

6. Ukomisa:

• I-cellulose ehlanzekile ne-methylated yomiswa ukuze kutholwe umkhiqizo wokugcina we-methyl cellulose ether ngendlela yempushana noma ama-granules.

7. Ukulawula Ikhwalithi:

• Amasu okuhlaziya ahlukahlukene, okuhlanganisa i-spectroscopy ye-nuclear magnetic resonance (NMR), i-Fourier-transform infrared (FTIR) spectroscopy, kanye ne-chromatography, asetshenziselwa ukulawula ikhwalithi. I-degree of substitution (DS) iyipharamitha ebalulekile eqashwe ngesikhathi sokukhiqiza.

8. Ukwakhiwa kanye Nokupakishwa:

• I-methyl cellulose ether ibe isilungiswa ibe amabanga ahlukene ukuze ihlangabezane nezimfuneko ezithile zezinhlelo zokusebenza ezihlukahlukene. Amabanga ahlukene angahluka nge-viscosity yawo, usayizi wezinhlayiyana, nezinye izakhiwo.
• Imikhiqizo yokugcina iyapakishwa ukuze isatshalaliswe.

Kubalulekile ukuqaphela ukuthi izimo ezithile nama-reagents asetshenziswa ekuphenduleni kwe-etherification kungahluka ngokuya ngezinqubo zobunikazi zomkhiqizi kanye nezici ezifiselekayo zomkhiqizo we-methyl cellulose. I-Methyl cellulose ithola izinhlelo zokusebenza embonini yokudla, ezemithi, ezokwakha, neminye imikhakha ngenxa yokuncibilika kwamanzi kanye namakhono okwenza ifilimu.