Gutegura ethers ya selile

Gutegura kwaselile ethersbikubiyemo guhindura imiti ya polymer selile isanzwe binyuze muri etherification reaction. Ubu buryo butangiza amatsinda ya ether kumatsinda ya hydroxyl ya selile ya polymer ya selulose, biganisha kumikorere ya selile ya selile ifite imiterere yihariye. Ethers ikunze kugaragara cyane harimo Hydroxypropyl Methylcellulose (HPMC), Carboxymethyl Cellulose (CMC), Hydroxyethyl Cellulose (HEC), Methyl Cellulose (MC), na Ethyl Cellulose (EC). Dore incamake rusange yuburyo bwo kwitegura:

1. Isoko rya selile:

• Inzira itangirana no gushakisha selile, ubusanzwe ikomoka kumiti cyangwa ipamba. Guhitamo isoko ya selile irashobora guhindura imiterere yibicuruzwa byanyuma bya selile.

2. Gusunika:

• Cellulose ikorerwa inzira yo kumenagura fibre muburyo bukoreshwa neza. Ibi birashobora kuba bikubiyemo uburyo bwa mashini cyangwa imiti.

3. Kwezwa:

• Cellulose isukuwe kugirango ikureho umwanda, lignine, nibindi bikoresho bitari selile. Iyi ntambwe yo kweza ningirakamaro kugirango ubone ibikoresho byiza bya selile.

4. Igisubizo cya Etherification:

• Cellulose isukuye ikorerwa etherification, aho amatsinda ya ether yinjizwa mumatsinda ya hydroxyl kumurongo wa polymer. Guhitamo ibikorwa bya etherifying agent nibisubizo biterwa nibicuruzwa bya selile yifuza.
• Ibikoresho bisanzwe bya etherifingi birimo okiside ya Ethylene, okiside ya propylene, sodium chloroacetate, methyl chloride, nibindi.

5. Kugenzura ibipimo byerekana:

• Imyitwarire ya etherification igenzurwa neza mubijyanye n'ubushyuhe, umuvuduko, na pH kugirango ugere kurwego rwifuzwa rwo gusimburwa (DS) kandi wirinde ingaruka.
• Imiterere ya alkaline ikoreshwa kenshi, kandi pH yimvange ya reaction irakurikiranirwa hafi.

6. Kutabogama no Gukaraba:

• Nyuma ya reaction ya etherification, ibicuruzwa akenshi bidafite aho bibogamiye kugirango bikureho reagent zirenze cyangwa nibindi bicuruzwa. Iyi ntambwe ikurikirwa no gukaraba neza kugirango ukureho imiti isigaye hamwe n’umwanda.

7. Kuma:

• Cellulose isukuye kandi ya etherifile yumishijwe kugirango ibone ibicuruzwa bya selile ya nyuma ya poro cyangwa ifu ya granular.

8. Kugenzura ubuziranenge:

• Uburyo butandukanye bwo gusesengura bukoreshwa mugucunga ubuziranenge, harimo na magnetiki resonance (NMR) spekitroscopi, Fourier-transform infrared (FTIR) spekitroscopi, na chromatografiya.
• Urwego rwo gusimbuza (DS) ni ikintu gikomeye gikurikiranwa mugihe cyo gukora kugirango habeho guhuzagurika.

9. Gutegura no gupakira:

• Ether ya selile noneho ikorwa mubyiciro bitandukanye kugirango ihuze ibisabwa byihariye bya porogaramu zitandukanye. Ibicuruzwa byanyuma bipakiye kugirango bikwirakwizwe.

Gutegura ethers ya selile nuburyo bukomeye bwimiti isaba kugenzura neza imiterere yimikorere kugirango ugere kubintu byifuzwa. Ubwinshi bwa ether ya selulose ituma ikoreshwa muburyo butandukanye bukoreshwa mu nganda, harimo imiti, ibiryo, ubwubatsi, impuzu, nibindi byinshi.