Ngowuphi umthombo wendalo we-hydroxyethyl cellulose?

I-Hydroxyethyl cellulose (HEC) yinto engekho-ionic yamanzi e-soluble polymer esetyenziswa ngokubanzi kwizinto zokuthambisa, amayeza, iipeyinti, iingubo, ukwakhiwa kunye nezinye iindawo. Inokuqina okugqwesileyo, ukumiswa, ukusabalalisa, i-emulsification, ifilimu-ukwenza, ukugcinwa kwamanzi kunye nezinye iipropathi, ngoko kuye kwaba yinto ebalulekileyo encedisayo kumashishini amaninzi. Nangona kunjalo, i-cellulose ye-hydroxyethyl ayifumanekanga ngokuthe ngqo kwizinto zendalo, kodwa ifunyenwe ngokuguqula iikhemikhali ze-cellulose yendalo. Ukuza kuthi ga ngoku, ukuqonda umthombo wendalo we-hydroxyethyl cellulose, kufuneka siqale siqonde umthombo kunye nesakhiwo seselulosi.

Umthombo wendalo we-cellulose
I-Cellulose yenye yeepolymers ezininzi kakhulu emhlabeni kwaye ifumaneka ngokubanzi kwiindonga zeeseli zezityalo, ngakumbi kwizityalo ezinomthi, umqhaphu, iflakisi kunye nezinye iintambo zezityalo. Iyinxalenye ephambili kwisakhiwo sesityalo kwaye inika amandla omatshini kunye nokuzinza. Iyunithi esisiseko ye-cellulose yi-molecule ye-glucose, edityaniswe ngamabhondi e-β-1,4-glycosidic ukwenza i-chain chain structure. Njengomathiriyeli wepolymer yendalo, i-cellulose ineempawu ezibalaseleyo zomzimba kunye neekhemikhali, iyenza ibe yimathiriyeli ekrwada ebalulekileyo kwizinto ezahlukeneyo eziphuma kuyo.

Ukulungiselela inkqubo ye-hydroxyethyl cellulose
Nangona i-cellulose ngokwayo ineempawu ezininzi ezigqwesileyo, uluhlu lwesicelo sayo lulinganiselwe kwinqanaba elithile. Esona sizathu sikukuba i-cellulose ayinakunyibilika kakuhle, ngakumbi ukunyibilika okulinganiselweyo emanzini. Ukuze kuphuculwe le propati, izazinzulu ziguqula i-cellulose ngokwekhemikhali ukuze zilungiselele izinto ezahlukeneyo zeselulosi. I-Hydroxyethyl cellulose yi-ether eselulosi enyibilikayo emanzini efunyenwe nge-ethoxylating cellulose yendalo ngokusabela kweekhemikhali.

Kwinkqubo ethile yokulungiselela, i-cellulose yendalo iqala ukuchithwa kwisisombululo se-alkali, kwaye i-ethylene oxide yongezwa kwindlela yokusabela. Ukusabela kwe-ethoxylation ye-ethylene oxide kunye namaqela e-hydroxyl kwi-cellulose kwenzeka ukuvelisa i-hydroxyethyl cellulose. Olu hlengahlengiso lunyusa i-hydrophilicity yamatyathanga e-cellulose, ngaloo ndlela iphucula ukunyibilika kwayo kunye neempawu ze-viscosity emanzini.

Imithombo engundoqo yemathiriyeli ekrwada
Undoqo wemathiriyeli ekrwada yokulungiswa kwe-hydroxyethyl cellulose yiselulosi, kunye nemithombo yendalo yeselulosi ibandakanya:

Ukhuni: Umxholo we-cellulose emthini uphezulu, ngakumbi kwi-coniferous kunye ne-wide-leaf wood, apho i-cellulose inokufikelela kwi-40% -50%. Ukhuni ngowona mthombo ubalulekileyo we-cellulose kwishishini, ngakumbi kwi-papermaking kunye nokuveliswa kwe-cellulose derivatives.

Umqhaphu: Ifayibha yomqhaphu iphantse yaqulunqwa ngeselulosi esulungekileyo, kwaye umxholo weselulosi kumqhaphu uphezulu ukuya kuthi ga kwi-90%. Ngenxa yokucoceka kwayo okuphezulu, i-cotton fiber isoloko isetyenziselwa ukulungisa izinto eziphuma kwi-cellulose ezikumgangatho ophezulu.

Iintsinga zezityalo ezifana neflakisi kunye ne-hemp: Ezi ntsinga zezityalo zikwatyebile kwiselulosi, kwaye ngenxa yokuba ezi ntsinga zezityalo zihlala zinamandla amakhulu omatshini, zikwanazo iingenelo ezithile ekutsalweni kweselulosi.

Inkunkuma yezoLimo: kubandakanywa indiza, umququ wengqolowa, umququ wengqolowa, njl. .

Iindawo zokusetyenziswa kwe-hydroxyethyl cellulose
Ngenxa yeempawu ezikhethekileyo ze-hydroxyethyl cellulose, isetyenziswa ngokubanzi kwiinkalo ezininzi. Oku kulandelayo ziindawo ezininzi eziphambili zesicelo:

Ishishini lokwakha: I-cellulose ye-Hydroxyethyl isetyenziswa ngokubanzi kwizinto zokwakha njenge-thickener kunye ne-agent yokugcina amanzi, ngokukodwa kwi-cement mortar, i-gypsum, i-putty powder kunye nezinye izinto, ezinokuphucula ngokufanelekileyo ukwakhiwa kunye nokugcinwa kwamanzi kwiipropati zezixhobo.

Imveliso yemichiza yemihla ngemihla: Kwizinto zokucoca, iimveliso zokhathalelo lwesikhumba, ishampu kunye nezinye iimveliso zemichiza yemihla ngemihla, i-hydroxyethyl cellulose isetyenziswa njengento etyebisayo kunye nezinzisi ukuphucula ukuva nokuzinza kwemveliso.

Ipeyinti kunye neengubo: Kumashishini okugcoba, i-hydroxyethyl cellulose isetyenziswe njenge-thickener kunye ne-rheology ye-agent yokulawula ukuphucula ukusebenza kwengubo kunye nokuphepha ukugoba.

Intsimi yamachiza: Kumalungiselelo amayeza, i-hydroxyethyl cellulose ingasetyenziselwa njenge-binder, i-thickener kunye ne-agent yokumisa iipilisi ukuphucula iimpawu zokukhululwa kunye nokuzinza kwamachiza.

Nangona i-hydroxyethyl cellulose ingeyiyo into eyenzekayo ngokwendalo, imathiriyeli ekrwada esisiseko, i-cellulose, ikhona ngokubanzi kwizityalo kwindalo. Ngokuguqulwa kweekhemikhali, i-cellulose yendalo inokuguqulwa ibe yi-hydroxyethyl cellulose ngokusebenza okugqwesileyo kwaye isetyenziswe kumashishini ahlukeneyo. Izityalo zendalo ezifana nemithi, umqhaphu, iflakisi, njl. Ngenkqubela phambili yesayensi kunye nobuchwepheshe kunye nokwanda kwemfuno yemizi-mveliso, inkqubo yokuvelisa i-hydroxyethyl cellulose nayo iphuculwa ngokuqhubekayo, kwaye kulindeleke ukuba ibonise ixabiso layo elikhethekileyo kwiinkalo ezininzi kwixesha elizayo.


Ixesha lokuposa: Oct-23-2024