I-Hydroxyethyl cellulose (HEC) yinto yepolymer enyibilikayo emanzini engeyiyo ionic esetyenziswa kakhulu kwizithambiso, amayeza, iipeyinti, izinto zokugquma, ulwakhiwo kunye nezinye iindawo. Inokujiya okugqwesileyo, ukumiswa, ukusasazwa, i-emulsification, ukwenza ifilimu, ukugcinwa kwamanzi kunye nezinye iimpawu, ngoko ke ibe yinto ebalulekileyo encedisayo kumashishini amaninzi. Nangona kunjalo, i-hydroxyethyl cellulose ayifumaneki ngokuthe ngqo kwizinto zendalo, kodwa ifunyanwa ngokuguqula i-cellulose yendalo ngokweekhemikhali. Ukuze sifikelele kule njongo, ukuze siqonde umthombo wendalo we-hydroxyethyl cellulose, kufuneka siqale siqonde umthombo kunye nolwakhiwo lwe-cellulose.
Umthombo wendalo we-cellulose
I-Cellulose yenye yezona polymers zininzi kakhulu emhlabeni kwaye ikhona kakhulu eludongeni lweeseli zezityalo, ingakumbi kwizityalo ezinemithi, umqhaphu, iflakisi kunye nezinye iifayibha zezityalo. Yinto ebalulekileyo kwisakhiwo sesityalo kwaye inika amandla oomatshini kunye nozinzo. Iyunithi esisiseko ye-cellulose yimolekyuli yeglucose, edityaniswe ziibhondi ze-β-1,4-glycosidic ukwenza isakhiwo setyathanga elide. Njengezinto ze-polymer zendalo, i-cellulose ineempawu ezintle zomzimba nezekhemikhali, nto leyo eyenza ukuba ibe yinto ebalulekileyo kwi-derivatives ezahlukeneyo.
Inkqubo yokulungiselela i-hydroxyethyl cellulose
Nangona i-cellulose ngokwayo ineempawu ezininzi ezintle, uluhlu lwayo lokusetyenziswa lulinganiselwe kwinqanaba elithile. Isizathu esiphambili kukuba i-cellulose ayinakunyibilika kakuhle, ingakumbi ukunyibilika okuncinci emanzini. Ukuze kuphuculwe le mpawu, izazinzulu ziguqula i-cellulose ngeekhemikhali ukuze zilungiselele iintlobo ngeentlobo ze-cellulose derivatives. I-Hydroxyethyl cellulose yi-ether ye-cellulose enyibilikayo emanzini efunyanwa ngokufaka i-ethoxylating natural cellulose ngokusebenzisa i-chemical reaction.
Kwinkqubo ethile yokulungiselela, i-cellulose yendalo iqala inyibilike kwisisombululo se-alkali, ize emva koko yongezwe i-ethylene oxide kwinkqubo yokusabela. I-ethoxylation reaction ye-ethylene oxide kunye namaqela e-hydroxyl kwi-cellulose iyenzeka ukuvelisa i-hydroxyethyl cellulose. Olu tshintsho lonyusa i-hydrophilicity yee-cellulose chains, ngaloo ndlela iphucula ukunyibilika kwayo kunye neempawu ze-viscosity emanzini.
Imithombo ephambili yezinto ezikrwada
Izinto ezisisiseko zendalo zokulungiselela i-hydroxyethyl cellulose yi-cellulose, kwaye imithombo yendalo ye-cellulose ibandakanya:
Umthi: Umthamo we-cellulose emthini uphezulu, ingakumbi kwimithi ye-coniferous kunye nemithi enamagqabi abanzi, apho i-cellulose inokufikelela kwi-40%-50%. Umthi ngomnye wemithombo ebalulekileyo ye-cellulose kushishino, ngakumbi ekwenzeni iphepha kunye nokuveliswa kwezinto eziphuma kwi-cellulose.
Ikhotoni: Ikhotoni yenziwe phantse nge-cellulose ecocekileyo, kwaye umxholo we-cellulose kwikhotoni ungaphezulu kwama-90%. Ngenxa yobunyulu bayo obuphezulu, ikhotoni idla ngokusetyenziselwa ukulungisa izinto eziphuma kwi-cellulose ezikumgangatho ophezulu.
Iifayibha zezityalo ezifana neflakisi kunye nehemp: Ezi fayibha zezityalo zikwatyebile kwi-cellulose, kwaye ngenxa yokuba ezi fayibha zezityalo zihlala zinamandla aphezulu oomatshini, zikwanazo neengenelo ezithile ekukhupheni i-cellulose.
Inkunkuma yezolimo: kuquka umququ, umququ wengqolowa, umququ wombona, njl. Ezi zinto ziqulathe isixa esithile se-cellulose, kwaye i-cellulose inokukhutshwa kuzo ngeenkqubo ezifanelekileyo zokunyanga, ezibonelela ngomthombo wezinto ezikrwada ezingabizi kwaye ezihlaziyekayo zokuvelisa izinto eziphuma kwi-cellulose.
Iindawo zokusetyenziswa kwe-hydroxyethyl cellulose
Ngenxa yeempawu ezikhethekileyo ze-hydroxyethyl cellulose, isetyenziswa kakhulu kwiindawo ezininzi. Nazi iindawo ezininzi eziphambili zokusetyenziswa:
Ishishini lokwakha: I-Hydroxyethyl cellulose isetyenziswa kakhulu kwizixhobo zokwakha njengesithambisi kunye nearhente yokugcina amanzi, ingakumbi kwi-samente mortar, i-gypsum, i-putty powder kunye nezinye izinto, ezinokuphucula ngempumelelo ulwakhiwo kunye neempawu zokugcina amanzi zezixhobo.
Ishishini leekhemikhali lemihla ngemihla: Kwiisepha, iimveliso zokhathalelo lolusu, iishampu kunye nezinye iimveliso zekhemikhali zemihla ngemihla, i-hydroxyethyl cellulose isetyenziswa njengesithambisi kunye nesiqinisi ukuphucula imvakalelo kunye nozinzo lwemveliso.
Iipeyinti kunye neengubo: Kwishishini leengubo, i-hydroxyethyl cellulose isetyenziswa njenge-thickener kunye ne-rheology control arhente ukuphucula ukusebenza kwengubo kunye nokuphepha ukugoba.
Intsimi yamayeza: Kwizinto ezisetyenziselwa amayeza, i-hydroxyethyl cellulose ingasetyenziswa njenge-binder, i-thickener kunye ne-agent yokuxhoma kwiipilisi ukuphucula iimpawu zokukhululwa kunye nozinzo lwamayeza.
Nangona i-hydroxyethyl cellulose ingelonto yendalo, izinto zayo ezisisiseko, i-cellulose, zifumaneka kakhulu kwizityalo kwindalo. Ngokutshintsha iikhemikhali, i-cellulose yendalo inokuguqulwa ibe yi-hydroxyethyl cellulose ngokusebenza kakuhle kwaye isetyenziswe kumashishini ahlukeneyo. Izityalo zendalo ezifana nomthi, umqhaphu, iflakisi, njl. zibonelela ngomthombo otyebileyo wezinto ezikrwada zokuvelisa i-hydroxyethyl cellulose. Ngokuhambela phambili kwesayensi netekhnoloji kunye nokwanda kwemfuno yemizi-mveliso, inkqubo yokuvelisa i-hydroxyethyl cellulose nayo iyaqhubeka nokuphuculwa, kwaye kulindeleke ukuba ibonise ixabiso layo elikhethekileyo kwiindawo ezininzi kwixesha elizayo.
Ixesha leposi: Oktobha-23-2024