Inkqubo yokwenziwa kwe-Methyl Seler

Ukwenziwa kwemethyl seluplose etherkubandakanya ukutshintsha kweekhemikhali kweseluperition nge-etherhesition. I-Methyl Selelose (MC) yi-Sele-inyibiliki enyibilikiswe ngamanzi asetyenziswe ngokubanzi kumashishini ahlukeneyo. Nantsi isishwankathelo ngokubanzi senkqubo yokwenziwa kwe-methyl seteli:

1. Ukukhetha umthombo weSeluplose:

• Inkqubo iqala ngokukhethwa komthombo weselfowuni, exhaphakileyo evela kwi-Pulp okanye i-Cotton. Umthombo we-sellese ukhethiweyo usekwe kwiimpawu ezinqwenelekayo zemveliso yokugqibela ye-methyl yeselfowuni.

2. Ukutsala:

• Umthombo okhethiweyo weselfowuni olukhethiweyo uphantsi ukutywina, inkqubo eqhekeza iintsinga kwifomu elilawulekayo ngakumbi. Ukutsalwa kunokufezekiswa ngeendlela zoomatshini okanye kwiikhemikhali.

I-3. Ukuvula i-sellyuese:

• Iseli edonsiweyo yenziwa ngokuyiphatha ngesisombululo sealkaline. Eli nyathelo lijolise ekudumbeni iintsinga zeselselose, zisenza ukuba zisebenze ngakumbi ngexesha lokuphendula kwasemva.

4. Ukuphendula kwe-etheristic

• I-seluplose evusiweyo iphantsi kwe-ether, apho amaqela e-ether, kule meko, amaqela e-methyl, aziswa kumaqela e-hydroxyl kwi-cleymer chain ye-selly.
• Impendulo yokuphendula ikhokelela ekusetyenzisweni kweearhente ze-methylating ezifana neSodium hydroxide kunye ne-methyl chloride okanye i-dimthyl sulfate. Iimeko ezisabela, kubandakanya iqondo lobushushu, uxinzelelo, kunye nokuphendula, zilawulwa ngononophelo ukufezekisa inqanaba elifunayo lokufakelwa (DS).

5. Ukungathathi cala kunye nokuhlamba:

• Emva kokuphendula kwe-Etheritition, imveliso ayithathi cala ukuba isuse ngaphezulu i-alkali. Amanyathelo okuhlamba emva koko aqhutywa ukuphelisa iikhemikhali zentsalela kunye nokungcola.

6. Ukomisa:

• Iseli ehlanjululwe kunye ne-methylates yomiswe ukuze ifumane imveliso yokugqibela ye-iteyl ye-ether kwifom ye-powder okanye igranti.

7. Ulawulo loMgangatho:

• Iindlela ezahlukeneyo zohlalutyo, kubandakanya i-nuclemar ressoning (i-NMR) ye-Spectrascopy, i-NMR-Geer-Genser) Spectrascopy, kunye neChromatography, zisetyenziswa kulawulo olusemgangathweni. Inqanaba lokufakwa endaweni (DS) yiparameter ebalulekileyo esweni ngexesha lemveliso.

8. Ukuqulunqwa kunye nokupakisha:

• I-Methyl Selersese I-Ether Iyotyelwa kumabakala ahlukeneyo ukuze ifezekise iimfuno ezithile zezicelo ezahlukeneyo. Amabakala ahlukeneyo anokwahluka kwi-viscosity yabo, ubungakanani bentsumpa, kunye nezinye iipropathi.
• Iimveliso zokugqibela zipakishwe ukuze zisasazwe.

Kubalulekile ukuba uqaphele ukuba iimeko ezithile kunye neendawo zokuhlala ezisetyenziswayo kwi-Etherise Repy inokwahluka ngokusekwe kwiinkqubo zonyango lomenzi kunye neepropathi ezinqwenelekayo zeMveliso ye-Methyl Selelose. I-Methyl Selelose ifumana izicelo kumzi-mveliso wokutya, amayeza, ulwakhiwo, kunye namanye amacandelo ngenxa yokwahlula kwamanzi kunye nokusebenza kwefilimu.