Ngaba i-hydroxyethylcellulose yinto yendalo okanye eyenziweyo?

Intshayelelo ngeHydroxyethylcellulose (HEC):

I-Hydroxyethylcellulose iphuma kwi-cellulose, i-polysaccharide yendalo efumaneka kwiindonga zeeseli zezityalo. I-Cellulose iqulunqwe ngokuphindaphindiweyo kweeyunithi ze-glucose ezidityaniswe kunye ne-β-1,4 glycosidic bonds. I-Hydroxyethyl cellulose ifumaneka ngokuguqula i-cellulose ngokungeniswa kwamaqela e-hydroxyethyl (-CH2CH2OH) kumqolo wayo.

Inkqubo yeMveliso:

I-Etherification yeCellulose: Ukuveliswa kwe-HEC kubandakanya i-etherification ye-cellulose. Le nkqubo iqala ngeselulosi ephuma kwintlama yomthi okanye iilitha zomqhaphu.

Ukusabela nge-Ethylene Oxide: I-Cellulose iphinda iphendule nge-ethylene oxide phantsi kweemeko ze-alkaline. Oku kusabela kukhokelela ekufakweni endaweni yamaqela e-hydroxyl kwi-cellulose backbone kunye namaqela e-hydroxyethyl, okukhokelela kwi-hydroxyethylcellulose.

Ukucocwa: Imveliso ke ihlanjululwe ukususa naziphi na ii-reagents ezingaphendulwanga kunye neemveliso ezisecaleni.

Iimpawu zeHydroxyethylcellulose:

Ukunyibilika: I-HEC iyanyibilika kumanzi abandayo kunye nashushu, yenza kucace kwizisombululo ezinodaka ngokuxhomekeke kuxinzelelo.

I-Viscosity: Ibonisa ukuziphatha kwe-pseudoplastic, oku kuthetha ukuba i-viscosity yayo iyancipha ngokunyuka kwesantya sokucheba. I-viscosity yezisombululo ze-HEC inokulungiswa ngezinto ezahlukeneyo ezifana nokugxininiswa kunye neqondo lokutshintshwa.

IiPropati zokuSebenza kweFilimu: I-HEC inokwenza iifilimu eziguquguqukayo kunye nezidibeneyo, okwenza kube luncedo kwizicelo ezahlukeneyo apho ukwakheka kwefilimu kuyadingeka.

I-Agent yokuqinisa: Enye yezinto eziphambili zokusetyenziswa kwe-HEC njenge-ejenti yokuqina kwimixube eyahlukeneyo, njengezinto zokuthambisa, amayeza, kunye neemveliso zokhathalelo lomntu.

Ukusetyenziswa kweHydroxyethylcellulose:

I-Cosmetics kunye neeMveliso zoNonophelo boMntu: I-HEC isetyenziswa ngokubanzi kwiimveliso zokuthambisa kunye neemveliso zokhathalelo lomntu njenge-thickener, stabilizer, kunye ne-agent-forming agent kwiimveliso ezifana ne-lotions, i-creams, i-shampoos, kunye ne-toothpaste.

I-Pharmaceuticals: Ekuqulunqweni kwamachiza, i-HEC isebenza njenge-arhente yokumisa, i-binder, kunye ne-matrix elawulwayo yokukhululwa kwiingubo zepilisi kunye nokulungiswa komlomo.

Iipende kunye neeNgxoxo: I-HEC isetyenziswe kwiipeyinti ezisekelwe emanzini kunye neengubo njenge-thickener kunye ne-rheology modifier ukulawula i-viscosity kunye nokuphucula iimpawu zesicelo.

Ishishini lokutya: Kwishishini lokutya, i-HEC isetyenziswa njenge-ejenti yokuqina kunye nokuzinzisa kwiimveliso ezifana neesosi, iilokhwe, kunye neemveliso zobisi.

Ingxoxo-mpikiswano yoHlelo lweNdalo okanye oluSetyenzisiweyo:

Ukuhlelwa kwe-hydroxyethylcellulose njengendalo okanye yokwenziwa kuxhomekeke kwingxoxo. Nazi iingxoxo ezisuka kuzo zombini iimbono:

Iingxoxo zoHlelo njengeNdibaniselwano:

Ukuguqulwa kweMichiza: I-HEC ivela kwi-cellulose ngokusebenzisa inkqubo yokuguqulwa kweekhemikhali ezibandakanya ukuphendula kwe-cellulose nge-ethylene oxide. Olu tshintsho lwekhemikhali luthathwa njengolwenziwe ngokwendalo.

Imveliso yoShishino: I-HEC iveliswa ngokuyintloko ngeenkqubo zoshishino ezibandakanya ukusabela okulawulwayo kunye namanyathelo okucoca, aqhelekileyo kwimveliso yekhompawundi yokwenziwa.

Idigri yokuguqulwa: Iqondo lokutshintshwa kwi-HEC linokulawulwa ngokuchanekileyo ngexesha lokudibanisa, ebonisa imvelaphi yokwenziwa.

Iingxoxo zokuhlela njengeNdalo:

Ithathwe kwiCellulose: I-HEC ekugqibeleni ivela kwi-cellulose, i-polymer yendalo efumaneka kakhulu kwizityalo.

Umthombo oVuselelekayo: Iselulosi, imathiriyeli yokuqala yemveliso ye-HEC, ifunyanwa kwimithombo ehlaziyekayo efana nentlaka yeenkuni kunye nomqhaphu.

I-Biodegradability: Njenge-cellulose, i-HEC i-biodegradable, idilika ibe yimveliso engenabungozi kwimo engqongileyo ngokuhamba kwexesha.

Ukufana okuSebenzayo kwiCellulose: Nangona ukuguqulwa kweekhemikhali, i-HEC igcina iipropati ezininzi ze-cellulose, ezifana nokunyibilika kwamanzi kunye ne-biocompatibility.

I-hydroxyethylcellulose yipolymer eguquguqukayo ephuma kwi-cellulose ngokusebenzisa inkqubo yokuguqulwa kweekhemikhali. Nangona imveliso yayo ibandakanya ukuphendulwa kokwenziwa kunye neenkqubo zoshishino, ekugqibeleni iphuma kumthombo wendalo kunye nokuhlaziywa. Ingxoxo-mpikiswano malunga nokuba i-HEC kufuneka ihlelwe njengendalo okanye i-synthetic ibonisa ubunzima bokuchaza la magama kumxholo weepolymer zendalo ezilungisiweyo. Nangona kunjalo, ukubola kwayo kwezinto eziphilayo, ukufunyanwa ngokutsha, kunye nokusebenza okufanayo kwiselulosi kucebisa ukuba ineempawu zazo zombini iikhompawundi zendalo kunye nezokwenziwa, isenza mfiliba imida phakathi kokuhlelwa kolu didi lubini.