Ithini inkqubo yemveliso yeMethylceluplose?

I-methylcelculose (mc) yi-polymer ye-polymer ye-polymer esetyenziswa ngokubanzi ekutyeni, amayeza, iikhemikhali zemihla ngemihla, ukwakhiwa kunye namanye amashishini. Inkqubo yayo yemveliso ibandakanya amanyathelo amaninzi, ikakhulu kubandakanya ukukhutshelwa kweselfowuni, indlela yokuguqula, yokomisa nokutyhoboza.

I-1. Ukukhupha iSeluplose
Izinto ezisisiseko ze-methylcelculose yindalo ye-sellyulose yendalo, edla ngokufumaneka kwi-pulp okanye umqhaphu. Okokuqala, iinkuni okanye i-cotton iphantsi kothotho lwezinto zokwanda ukuze isuse izinto ezingcolileyo (ezinje nge-lign, i-resin, iproteyini, njl njl) ukufumana i-sellyuese emsulwa. Iindlela eziqhelekileyo zokuqala zibandakanya indlela ye-acid-basese kunye nendlela e-enzymatic. Kwindlela ye-Acid-Sease, iinkuni okanye i-cotton ye-cotton iphathwa nge-sodium hydroxide (i-nah) okanye ezinye izisombululo ze-alkaline zokunyibilikisa i-LIGIN kunye nezinye izinto ezingcolileyo, ngaloo ndlela ziphawula isellulose.

I-2. Isivumelwano sokuphendula kwi-selulose
Emva koko, impendulo ye-methym yokusabela (i-etheristic yokuphendula) yenziwa ukulungiselela i-methylceluplose. Inyathelo lesiseko se-Etherhesition lisandul 'ukusabela nge-sellylase (iarhente ye-methyl chloride, i-methyl ionide, njl.) Ukufumana i-methylceluplose. Umsebenzi othile ngolu hlobo lulandelayo:

Ukukhetha ukwenziwa kweSisongelo: I-porivers (efana namanzi, ethanol okanye isoyile esixubeneyo samanzi kunye notywala) zihlala zongezwa ekuphuculeni ukusebenza kakuhle.
Iimeko zokuphendula: Indlela yokusabela yenziwa kubushushu obuthile kunye noxinzelelo, kunye nobushushu obuqhelekileyo bokuphendula bungama-50-70 ° C. Ngexesha lokuphendula, i-methyl chloride iphinda iphile kwiqela le-hydroxyl (---) kwimolekyuli ye-selselose ukuyiguqula ibe yi-methyl sellyulose.
Ulawulo lokuphendula: Indlela yokusabela ye-methyyring ifuna ulawulo oluchanekileyo lwexesha lokuphendula kunye neqondo lobushushu. Ixesha elide lokuphendula okanye ubushushu obuphezulu kakhulu lunokubangela ukuba kubekho i-seluplose, ngelixa ubushushu obuphantsi kakhulu okanye indlela engaphelelanga inokukhokelela kwi-methysity engasebenziyo, echaphazela intsebenzo ye-methyl sellyulose.

I-3. Ukungathathi cala kunye nokucoca
Emva kokuphendula kugqityiwe, i-Remedyation engachazwanga kunye ne-catalysts inokuhlala kwimveliso ye-Methyl Selelose, ekufuneka icocekile kwaye icocwe. Inkqubo yokungathathi hlangothi ihlala isebenzisa isisombululo se-acidic (njengesisombululo se-acetic acid) ukuze singathathi cala izinto ze-alkaline kwimveliso yokuphendula. Inkqubo yokucoca isebenzisa isixa esikhulu samanzi okanye utywala ukususa ii-slices, ezingekho ngqiqweni kunye neemveliso emva kokuphendula ukuqinisekisa ukucoceka kwemveliso yokugqibela.

4. Ukomisa kwaye ityumze
Emva kokuhlamba, i-methylcelculose ihlala ikwindlela yokuncamathisela okanye i-Gel State, ngoko ke kufuneka yomiswe ukufumana imveliso ehleliweyo. Zininzi iindlela zokuwome, kwaye ezisetyenzisiweyo eziqhelekileyo zibandakanya ukomisa, ukuwoma kwe-freeze ukomisa kwaye kuyamonga vacuum. Ngexesha lenkqubo yokomisa, iqondo lobushushu kunye nokufuma kufuneka lilawulwe ngokungqongqo ukuphepha ukubopha okubangelwa bubushushu obuphezulu okanye ukonakala kwi-Gel iipropathi.

Emva komile, i-methylcelcelcelculose kufuneka ikhutshelwe ukufezekisa ubungakanani obufunekayo. Inkqubo yokutyumza idla ngokugqitywa yi-jet jetm milling okanye yoomatshini bokugaya. Ngokulawula ubungakanani be -unticle, ireyithi yokuchithelwa kunye neempawu ze-viscosity ze-methylcelsulose zingalungiswa.

I-5. Ukuhlolwa kunye nokupakishwa kwemveliso yokugqibela
Emva kokutyumza, i-methylcelculose kufuneka ilawule umgangatho ophantsi ukuqinisekisa ukuba iyahlangabezana neenkcazo zobugcisa. Izinto zokuhlola eziqhelekileyo zibandakanya:

Umxholo wokufuma: Umswandi omkhulu we-methylcelcelculose uza kuchaphazela uzinzo kunye nokugcinwa kwazo.
Ubungakanani bentsumpa
Inqanaba le-methylid: Inqanaba le-methylity luphawu oluphambili lokuvavanya umgangatho we-methylcelsulose, echaphazela isothungela kunye nokusebenza kwesicelo.
Ukungabina kunye nokuVala: Ukungabizi kunye nokubonakala kwe-methylcelgalose ziiparamitha ezibalulekileyo kwisicelo sayo, ngakumbi kwicandelo lokutya namayeza.
Emva kokuphumelela uhlolo, imveliso iya kupakishwa ngokweemfuno ezahlukeneyo, ihlala kwiingxowa zeplastiki okanye iingxowa zephepha, kwaye iphawulwe ngenombolo ye-Batch yemveliso, imihla yemveliso kunye nolunye ulwazi.

I-6. Ukukhusela kwendalo kunye nokhuseleko
Ngexesha lenkqubo yemveliso ye-methyl seluplose, amanyathelo afanelekileyo okhuselo esisingqongileyo kufuneka athathwe, ngakumbi kwiikhemikhali kunye nezicoci ezisetyenzisiweyo kwinkqubo yokuphendula. Emva kokuphendula, ulwelo olunqabileyo kunye negesi yenkunkuma kufuneka inyangwe ukunqanda ukulungisa indalo. Ukongeza, ukwenziwa ngokutsha komhlaba kwinkqubo yemveliso kufuneka kwenziwe ngokungqinelana neenkqubo zokusebenza ngokuqhubekekayo ukuqinisekisa ukhuseleko lwabasebenzi.

Inkqubo yemveliso ye-methyl ikakhulu ibandakanya ukuthotyelwa kweselfowuni, impendulo ye-methyyroty, ukuhlamba kunye nokungathathi cala, ukomisa nokutyhola. Ikhonkco ngalinye linefuthe elibalulekileyo kumgangatho wemveliso yokugqibela, ngenxa yoko kulawula nokubeka esweni kwinkqubo yemveliso kubaluleke kakhulu. Ngale nkqubo yenkqubo, i-methyl seluplose ehlangabezana neemfuno ezahlukeneyo zesicelo zinokuveliswa.