Ukuvelisa i-hydroxythyl seluplose (hec) ibandakanya uthotho lwezinto zekhemikhali zokutshintsha isellulose, i-polymer yemvelo ivela kwizityalo. I-Hec isetyenziswa ngokubanzi kumashishini ahlukeneyo, kubandakanya amayeza, cosmetics, ukutya, kunye nolwakhiwo, ngenxa yokutsalwa kwayo, ukuzinza kwayo, kunye nokugcina amanzi.
Intshayelelo kwi-Hydroxythyl seluplose (Hec)
I-HydroxyEtheetheetheetheethl seluplose (hec) yi-polymer engeyiyo i-ionic, i-poly-allmer ye-injiki evela kwi-selsulose ngokuguqula iikhemikhali. Isetyenziswe ngokubanzi njenge-culking, ukulungisa, kunye nokuzinzisa iarhente kumashishini ahlukeneyo.
Iimpahla ezingekasilwa
I-sellyulose: Isixhobo esiphambili semveliso yehek. I-seluplose inokufunyanwa kwizixhobo ezahlukeneyo zezityalo ezinjengesipu senkuni, umqhaphu, okanye iintsalela zezolimo.
I-Ethylene oxide (EO): Ikhemikhali esetyenzisiweyo yokwazisa amaqela e-hydroxyteythyl kwi-selsulose umva.
I-Alkali: Ngokwesiqhelo i-sodium hydroxide (i-nah) okanye i-potassium hydroxide (Koh) isetyenziswa njengeyona nto iphambili ekuphenduleni.
Inkqubo yokwenziwa kwemveliso
Ukuveliswa kwe-hec kubandakanya ukuthotywa kwe-seluplose ne-ithoylene oxide phantsi kweemeko ze-alkaline.
La manyathelo alandelayo achaza inkqubo:
I-1. Ukunyanga kwangaphambili kwesellulose
I-seluplose ihlanjululwe kuqala ukususa ukungcola njengeLign, Himicellulose, kunye nezinye izicatshulwa. I-sellyuse ihlanjululwe kuyo yominye imisingo ethile yokufuma.
I-2. Isiphelo sokuphendula
Ukulungiswa kwesisombululo se-alkaline: isisombululo se-Aldium hydroxide (i-nah) okanye i-nah) okanye i-potassium hydroxide (Koh) ilungiselelwe. Ukuxinezeleka kwesisombululo se-alkali kubalulekile kwaye kufuneka kwenziwe ngokusekwe kwinqanaba elifunekayo lokufakelwa (DS) yemveliso yokugqibela.
Ukuseta okuphendulweyo: Ukutyhilwa kweselsulose kukhutshelwe isisombululo se-alkali. Umxube ufumaneka kubushushu obuthile, ngokuqhelekileyo i-50-70 ° C, ukuqinisekisa ukuba i-selsulose idumbile kwaye iyafikeleleka ekuphenduleni.
Ukongezwa kwe-EOLLELINE OXIDE Impendulo yi-exoyermic, ukulawula ubushushu kubalulekile ukuthintela ukugqithisa.
Ukujongwa kweliso: Inkqubela phambili yokuphendula ibekwe esweni ngokuhlalutya iisampulu rhoqo. Iindlela zobugcisa ezifana ne-speed-right spectroscopy (fir) zinokusetyenziselwa ukumisela inqanaba lokufakwa endaweni (DS) yeqela le-hydroxyyl kwi-sellybone.
Ukungathathi cala kunye nokuhlamba: Nje ukuba i-DS enqwenelekayo iphunyeziwe, impendulo icinyiwe ngokuchasene nesisombululo se-alkaline nge-acid, ngesiqhelo i-aceid. I-hec ekhuthazayo ihlanjwe ngokucokisekileyo ngamanzi ukuze isuse nakuphi na ukuphinda-phinda kunye nokungcola.
3. Ukucocwa kunye nokomisa
I-hec ehlanjwe ihlanjululwe ngokuphefumla ngokufihlakeleyo okanye ngokuqinileyo ukuze isuse nayiphi na into engcolileyo. I-hec ehlanjululwe emva koko yomisiwe kumxholo omkhulu wokufumanisa imveliso yokugqibela.
Ulawulo lwemeko
Ulawulo loMgangatho lubalulekile kuyo yonke inkqubo ye-hec ye-hec yokuqinisekisa ukungqinelana nokucoceka kwemveliso yokugqibela. Iiparamitha eziphambili zokubeka iliso kuBandakanya:
Inqanaba lokufakwa endaweni (DS)
I-viscofity
Umxholo womswakama
pH
Ukucoceka (ukungabikho kokungcola)
Iindlela zokuhlalutya ezifana ne-ftir, imilinganiselo ye-viscosity, kunye nohlalutyo lwezinto ezisetyenziswayo zisetyenziselwa ukulawulwa komgangatho.
Izicelo ze-hydroxythyl seluplose (hec)
I-HEC ifumana izicelo kumashishini ahlukeneyo ngenxa yeepropathi zayo eziguquguqukayo:
Amayeza: Isetyenziswe njenge-arhente yokuthambisa kuminciso olwenziweyo, ukumiswa kwezihloko, kunye nokulawulwa kwenkqubo yokuhambisa iziyobisi.
I-cosmetics: isetyenziswa ngokuqhelekileyo kwiikhrim, i-lotions, kunye ne-shampoos njenge-thispoos njenge-thichwener kunye ne-stabilizer.
Ukutya: yongezwa kwiimveliso zokutya njenge-arhente yokuthambisa kunye ne-gelsifier, i-eulsifier, kunye nokuzinzisa.
Ulwakhiwo: Isetyenziswe kwisifo esekwe kwisamente kunye nokukhula kokuphucula ukusebenza kunye nokugcinwa kwamanzi.
Ukuqwalaselwa kokusiNgqongileyo nezokhuseleko
Impembelelo yokusiNgqongileyo: Ukuveliswa kwe-HEC kubandakanya ukusetyenziswa kweekhemikhali ezinje nge-i-e-ithone oxide kunye ne-alkalis, enokuba neziphumo zokusingqongileyo. Ulawulo lwenkunkuma efanelekileyo kunye nokubambelela kwimigaqo kubalulekile ukunciphisa ifuthe lwendalo.
Ezokhuseleko: I-Ebanone Oxide yindawo yokusebenza esebenzayo kunye negesi enokutsha, isuti yokhuseleko ngexesha lokuphatha kunye nokugcinwa. Umoya ofanelekileyo, izixhobo zokhuselo lobuqu (i-PPE), kunye neeprotocol zokhuseleko ziyimfuneko ukuqinisekisa ukhuseleko lwabasebenzi.
I-HydroxyEtheetheetheetheetheetheetheethl seluplose (Hec) i-polymer exabisekileyo enezicelo ezahlukileyo kumashishini avela kwiindawo ezivela kumachiza ezokwakha. Ukuveliswa kwayo kubandakanya ukuthantamisa kwe-sellyulose ne-e-itholene oxide phantsi kweemeko ze-alkaline. Amanyathelo olawulo esemgangathweni ibalulekile ukuqinisekisa ukungqinelana nobunyulu bemveliso yokugqibela. Ukuqwalaselwa kokusingqongileyo nokhuseleko kufuneka kujongwane nayo kuyo yonke inkqubo yemveliso. Ngeenkqubo ezifanelekileyo kunye neeprotocols, i-HEC inokuveliswa ngokufanelekileyo ngelixa incitshiswa impembelelo yokusingqongileyo kunye nokuqinisekisa ukhuseleko lwabasebenzi.
Esi sikhokelo sibanzi sigubungela inkqubo yemveliso ye-hydroxythyl seluplose (hec) ngokweenkcukacha, ukusuka kwizinto ezingafunekiyo kulawulo olusemgangathweni kunye nokusebenza, ukubonelela ngokuqonda okubalulekileyo kwenkqubo yokwenziwa kwePolymer.
IXESHA LOKUQALA: APR-10 ukuya kwi-1024