Kukhazikika kwa hydroxyethyl cellulose m'malo osiyanasiyana

Hydroxyethyl cellulose (hec) imagwiritsidwa ntchito powolomera kwambiri m'mafakitale osiyanasiyana chifukwa chosungunulira madzi monga kusungunuka madzi, luso lakumwamba, ndi zopanda pake. Kumvetsetsa kukhazikika kwake pansi pa ma pho ndi chofunikira kwambiri pakugwiritsa ntchito kwake mwaluso.

Hydroxyethyl cellulose (Hec) ndi wochokera kwa cellulose, polymer mwachilengedwe amapezeka mokwanira mu makhola a cell. Hec yapeza chidwi kwambiri m'mafakitale monga mankhwala, zodzoladzola, chakudya, ndi zopanga madzi, kuphatikizapo kuchepa kwa madzi, kuthekera kwa mafilimu, komanso kuthekera kwa makanema. Komabe, kukhazikika kwa hec pansi pa pH kosiyanasiyana ndikofunikira pakugwiritsa ntchito kwake bwino pamapangidwe osiyanasiyana.

Kukhazikika kwa Hec kungatengedwe ndi zinthu zingapo, ndi P P kukhala limodzi mwa magawo ofunikira kwambiri. PH imakhudza mkhalidwe wa magwiridwe antchito omwe ali mu Hec, potero amakhudza kususuka kwake kususuka, mafakisoni, ndi zina. Kuzindikira machitidwe a Hec mu make osiyanasiyana ndikofunikira kuti othandizira apangidwe kuti athe kukonza magwiridwe ake m'njira zosiyanasiyana.

Kupanga kwa hydroxyethyl cellulose:
Hec amapangidwa chifukwa cha zomwe wapasintha cellulose ndi ethylene oxide, zomwe zimapangitsa kuti ma hydroxyethyl magulu magulu am'mimba a cellulose. Mulingo wa zolowetsa (DS) wa magulu a hydroxyethyl amatsimikizira katundu wa Hec, kuphatikiza kuchepetsedwa kwake ndikutha. Kapangidwe kake ka Hec kumapangitsa kuti zinthu zapadera zizikhala zofunika kwambiri pamagawo osiyanasiyana.

Magulu oyamba ogwira ntchito ku Hec ndi hydroxyl (--Oh) ndi ma ether (-) Kukhalapo kwa hydroxyethyl m'malo owonjezera hydrophilicity wa cellulose, zomwe zimapangitsa kuti zisungunuke bwino madzi poyerekeza ndi cellulose. Maulalo a eathe amapereka bata mamolekyulu, kupewa kuwonongeka kwawo.

2. Zochita ndi PH:
Kukhazikika kwa hec m'magawo osiyanasiyana kumayendetsedwa ndi kuchititsa magwiridwe antchito ake. Mu acidic mikhalidwe (Ph <7) Magulu a hydroxyl omwe alipo mu Hec akhoza kusokonekera, amatsogolera ku kuchepa kwa kusungunuka ndi mafayilo. Mofananamo, mu ma alkaline (pH> 7), Kudzikuza kwa magulu a hydroxyl kumatha kuchitika, kumakhudza katundu wa polymer.

Kutsika pH, kutsuka kwa ma hydroxyl kumatha kusokoneza mgwirizano wamatenda a hydrogen mkati mwa polymer matrix, zomwe zimapangitsa kuti kuchepetsedwa kuchepetsedwa. Izi zimadziwika kuti ndizopezeka m'matudi apamwamba, pomwe ambiri a ma hydroxyl amapezeka kuti afanane. Zotsatira zake, mawonekedwe a mayankho a HeC amatha kuchepa kwambiri m'mitundu ya acidic, akukhudza momwe amagwirira ntchito ngati wothandizira.

Kumbali inayo, mu milkiline mikhalidwe, kudzikuza kwa magulu a hydroxyl amatha kuwonjezera kusungunuka kwa Hec chifukwa cha mapangidwe a ma ions alkoxide. Komabe, kuyamwa kwambiri kumatha kuwonongeka kuwonongeka kwa polymer kudzera mu base - wogwirizira hydrolys a ukwati wa ether, zomwe zimapangitsa kuchepa kwa ma viscction ndi zina. Chifukwa chake, kusunga pH mkati mwa malo oyenera ndikofunikira kuonetsetsa kukhazikika kwa hec mu milkalines.

Kutanthauzira kwa 3.Practical:
Kukhazikika kwa Hec m'malo osiyanasiyana a ma ali ndi tanthauzo lalikulu pakugwiritsa ntchito mafakitale osiyanasiyana. M'makampani opanga mankhwala, hec amagwiritsidwa ntchito ngati wothandizidwa ndi pakamwa monga kutulutsa, emulsions, ndi ma gelssions. PH ya izi ziyenera kulamuliridwa mosamala kuti mukhalebe ndi mafayilo ofunikira komanso kukhazikika kwa Hec.

Mofananamo, m'makampani opanga zodzikongoletsera, hec amagwiritsidwa ntchito muzogulitsa ma shampoos, mafuta, ndi zotupa chifukwa cha kukula kwake komanso kutulutsa zinthu. PH ya izi zitha kusiyanasiyana malinga ndi zofunikira pazinthu zomwe zimapangidwa ndikufanana kwa hec ndi zosakaniza zina. Opanga ayenera kuganizira za pH pa bata ndi magwiridwe antchito a hec kuti awonetsetse kuti phindu ndi chikhutiro.

Mu makampani ogulitsa zakudya, Hec amagwiritsidwa ntchito ngati kukulitsa komanso kukhazikika kwa othandizira osiyanasiyana, kuphatikizapo msuzi, mavalidwe, ndi zakudya. PH ya zopangidwa zakudya zimatha kuyambira acidic kupita ku alkiline, kutengera zosakaniza ndi kukonza zinthu. Kuzindikira machitidwe a Hec mu malo osiyanasiyana a ma a make ndikofunikira kuti akwaniritse mawonekedwe omwe akufuna, pakamwa, komanso kukhazikika mu chakudya.

Mu makampani omanga, Hec amagwiritsidwa ntchito pogwiritsa ntchito mankhusu, mafoot, komanso amamatira kuwongolera madzi otetezedwa. The Ph wa mapangidwe awa akhoza kukhala osiyanasiyana kukhala osiyanasiyana kutengera zinthu zochirikiza komanso kukhalapo kwa zowonjezera. Kutha kukonza kanjeko kasupe ndikofunikira pakuwonetsetsa momwe ntchitoyo imagwirira ntchito ndi kukhazikika kwa zinthu zomanga.

Kukhazikika kwa hydroxyethyl cellulose (hec) m'malo osiyanasiyana a p Kuzindikira machitidwe a Hec pansi pa ma p Kafukufuku wina ndi wofunika kwambiri ndikuwugwiritsa ntchito njira zomwe zimayambitsa kukhazikika kwa Hec ndikupanga njira zothandizira kuchita zomwe zimayambitsa Ph.