Ithini iqondo lokubila le-hydroxyethyl cellulose?

I-Hydroxyethyl Cellulose (HEC) yi-polymer enyibilikayo emanzini engeyiyo ionic esetyenziswa kakhulu kwiingubo, kwizinto zokuthambisa, amayeza, ukutya, ukwenza amaphepha, ukubhola ioyile nakwezinye iindawo zoshishino. Yi-compound ye-cellulose ether efunyenwe ngokufakelwa kwe-cellulose, apho i-hydroxyethyl ithatha indawo yeqela le-hydroxyl le-cellulose. Iipropati zomzimba nezekhemikhali ze-hydroxyethyl cellulose zenza ukuba ibe yenye yezona zinto zibalulekileyo ze-thickeners, ii-gelling agents, ii-emulsifiers kunye neziqinisi.

Iqondo lokubila le-hydroxyethyl cellulose
I-Hydroxyethyl cellulose yi-polymer ephezulu ye-molecular enobunzima obukhulu be-molecular, kwaye indawo yayo yokubilisa ayilula ukuyichonga njengeyee-compounds ezincinci ze-molecular. Kwiindlela ezisebenzayo, izinto eziphezulu ze-molecular ezifana ne-hydroxyethyl cellulose azinawo umgangatho ocacileyo wokubilisa. Isizathu kukuba izinto ezinjalo ziya kubola ngexesha lokufudumeza, endaweni yokutshintsha ngokuthe ngqo ukusuka kulwelo ukuya kwi-gesi ngokutshintsha kwesigaba njengezinto eziqhelekileyo ezincinci ze-molecular. Ke ngoko, ingcamango "yendawo yokubilisa" ye-hydroxyethyl cellulose ayisebenzi.

Ngokubanzi, xa i-hydroxyethyl cellulose ifudunyezwa kubushushu obuphezulu, iya kuqala inyibilike emanzini okanye kwi-organic solvent ukuze yenze isisombululo se-colloidal, kwaye emva koko kubushushu obuphezulu, ikhonkco le-polymer liya kuqala ukuqhekeka kwaye ekugqibeleni libole ngobushushu, likhuphe iimolekyuli ezincinci ezifana namanzi, i-carbon dioxide kunye nezinye izinto eziguquguqukayo ngaphandle kokudlula kwinkqubo eqhelekileyo yokubila. Ke ngoko, i-hydroxyethyl cellulose ayinayo indawo yokubila ecacileyo, kodwa iqondo lobushushu lokubola, elihluka ngobunzima bayo beemolekyuli kunye nenqanaba lokutshintshwa. Ngokubanzi, iqondo lobushushu lokubola kwe-hydroxyethyl cellulose lidla ngokuba ngaphezulu kwama-200°C.

Uzinzo lobushushu lwe-hydroxyethyl cellulose
I-Hydroxyethyl cellulose inozinzo oluhle lweekhemikhali kubushushu begumbi, inokumelana noluhlu oluthile lweendawo ezine-asidi kunye ne-alkali, kwaye inokumelana nobushushu obuthile. Nangona kunjalo, xa ubushushu buphezulu kakhulu, ingakumbi xa kungekho zinyibilikisi okanye ezinye izinto ezizinzisayo, imixokelelwane yepolymer iya kuqala ukuqhekeka ngenxa yesenzo sobushushu. Le nkqubo yokubola kobushushu ayiphelekwa kukubila okucacileyo, kodwa ihambisana nokuqhekeka kancinci kancinci kwemixokelelwane kunye nokusabela kokuphelelwa ngamanzi emzimbeni, ikhupha izinto eziguquguqukayo kwaye ekugqibeleni ishiye iimveliso ezine-carbon.

Kwimisebenzi yemizi-mveliso, ukuze kuthintelwe ukubola okubangelwa bubushushu obuphezulu, i-hydroxyethyl cellulose ayidla ngokungavezwa kwindawo engaphaya kobushushu bayo bokubola. Kwanakwimisebenzi yobushushu obuphezulu (njengokusetyenziswa kolwelo lokugrumba i-oyile), i-hydroxyethyl cellulose idla ngokusetyenziswa kunye nezinye izinto ukuphucula uzinzo lwayo lobushushu.

Ukusetyenziswa kwe-hydroxyethyl cellulose
Nangona i-hydroxyethyl cellulose ingenalo iqondo lokubila elicacileyo, ukunyibilika kwayo kunye neempawu zayo zokutyeba zenza ukuba isetyenziswe kakhulu kwimizi-mveliso emininzi. Umzekelo:

Ishishini lokugquma: i-hydroxyethyl cellulose ingasetyenziswa njengesithambisi ukunceda ukulungisa i-rheology yokugquma, ukuthintela imvula kunye nokuphucula ukulingana kunye nozinzo lokugquma.

Izinto zokuthambisa kunye neekhemikhali zemihla ngemihla: Sisithako esibalulekileyo kwiisepha ezininzi, iimveliso zokhathalelo lolusu, iishampu kunye nee-toothpastes, ezinokunika imveliso ubumanzi obufanelekileyo, ukufuma kunye nozinzo.

Ishishini leMithi: Kwizinto ezilungiselelwe amayeza, i-hydroxyethyl cellulose idla ngokusetyenziswa ekuveliseni iipilisi ezikhutshwa rhoqo kunye neengubo zokulawula izinga lokukhululwa kwamayeza.

Ishishini lokutya: Njengesithambisi-zinzisi, isiqinisi kunye ne-emulsifier, i-hydroxyethyl cellulose ikwasetyenziswa ekutyeni, ingakumbi kwi-ayisikhrim, ijeli kunye neesosi.

Ukubhola ngeoyile: Kwindawo yokubhola ngeoyile, i-hydroxyethyl cellulose yinxalenye ebalulekileyo yolwelo lokubhola, olunokunyusa i-viscosity yolwelo, luzinzise udonga lomthombo kwaye lunciphise ukulahleka kodaka.

Njengezinto zepolymer, i-hydroxyethyl cellulose ayinalo iqondo lokubila elicacileyo kuba iyabola kumaqondo obushushu aphezulu endaweni yento eqhelekileyo yokubila. Ubushushu bayo bokubola kobushushu buhlala bungaphezulu kwama-200°C, kuxhomekeke kubunzima bayo beemolekyuli kunye nobungakanani bokutshintshwa kwayo. Nangona kunjalo, i-hydroxyethyl cellulose isetyenziswa kakhulu kwiingubo, izinto zokuthambisa, amayeza, ukutya kunye nepetroleum ngenxa yeempawu zayo ezintle zokutyeba, i-gelling, i-emulsifying kunye nokuzinzisa. Kwezi zicelo, idla ngokuthintelwa ekuvezweni kumaqondo obushushu aphezulu kakhulu ukuqinisekisa ukusebenza kwayo kunye nozinzo.