Kodi hydroxyethyl cellulose ndi chiyani?

Ma cellulose a Hydroxyethyl (HEC) ndi polima osasungunuka m'madzi omwe amagwiritsidwa ntchito kwambiri popaka, zodzoladzola, mankhwala, chakudya, kupanga mapepala, kubowola mafuta ndi madera ena ogulitsa. Ndi cellulose etha pawiri akamagwira etherification wa mapadi, imene hydroxyethyl m'malo mbali ya hydroxyl magulu mapadi. Maonekedwe a thupi ndi mankhwala a hydroxyethyl cellulose amapangitsa kuti ikhale imodzi mwazinthu zofunika kwambiri za thickeners, gelling agents, emulsifiers ndi stabilizers.

Malo otentha a hydroxyethyl cellulose
Hydroxyethyl cellulose ndi ma polima apamwamba kwambiri okhala ndi kulemera kwakukulu kwa mamolekyulu, ndipo nsonga yake yeniyeni yowira sivuta kudziwa ngati yamagulu ang'onoang'ono a maselo. Pakugwiritsa ntchito, zida zapamwamba zama cell monga hydroxyethyl cellulose zilibe malo owira bwino. Chifukwa chake ndi chakuti zinthu zotere zimawola pakatenthedwa, m'malo mosintha kuchokera kumadzi kupita ku gasi kudzera mukusintha kwagawo ngati tinthu tating'ono tating'ono tating'ono. Choncho, lingaliro la "boiling point" la hydroxyethyl cellulose silikugwira ntchito.

Nthawi zambiri, pamene hydroxyethyl mapadi ndi usavutike mtima pa kutentha kwambiri, choyamba kupasuka m'madzi kapena zosungunulira organic kupanga njira colloidal, ndiyeno pa kutentha apamwamba, unyolo polima adzayamba kusweka ndipo potsiriza thermally kuwola, kumasula mamolekyu ang'onoang'ono monga madzi, mpweya woipa ndi zinthu zina kosakhazikika popanda kukumana mmene kuwira ndondomeko. Choncho, hydroxyethyl mapadi alibe bwino kuwira mfundo, koma kuwonongeka kutentha, amene amasiyana ndi maselo kulemera ndi digiri ya m'malo. Nthawi zambiri, kutentha kwa hydroxyethyl cellulose kumakhala kopitilira 200 ° C.

Kukhazikika kwamafuta a hydroxyethyl cellulose
Ma cellulose a Hydroxyethyl ali ndi kukhazikika kwamankhwala abwino kutentha kwa chipinda, amatha kupirira mitundu ina ya asidi ndi alkali, ndipo amakhala ndi kukana kutentha kwina. Komabe, kutentha kukakhala kokwera kwambiri, makamaka ngati palibe zosungunulira kapena zokhazikika zina, maunyolo a polima amayamba kusweka chifukwa cha kutentha. Kuwola kotereku sikumatsagana ndi kuwira kodziwikiratu, koma kusweka kwapang'onopang'ono ndi kutaya madzi m'thupi, kutulutsa zinthu zomwe zimasokonekera ndipo pamapeto pake zimasiya zinthu za carbonized.

M'mafakitale ogwiritsira ntchito, pofuna kupewa kuwonongeka chifukwa cha kutentha kwambiri, hydroxyethyl cellulose nthawi zambiri sakhala ndi chilengedwe choposa kutentha kwake. Ngakhale pakutentha kwambiri (monga kugwiritsa ntchito madzi akubowola m'mafuta), hydroxyethyl cellulose imagwiritsidwa ntchito limodzi ndi zida zina kuti izi zitheke.

Kugwiritsa ntchito hydroxyethyl cellulose
Ngakhale kuti cellulose ya hydroxyethyl ilibe malo owira bwino, kusungunuka kwake ndi kukhuthala kwake kumapangitsa kuti igwiritsidwe ntchito m'mafakitale ambiri. Mwachitsanzo:

Makampani okutira: hydroxyethyl mapadi angagwiritsidwe ntchito ngati thickener kuthandiza kusintha rheology ❖ kuyanika, kuteteza mpweya ndi kusintha mlingo ndi bata ❖ kuyanika.

Zodzoladzola ndi mankhwala a tsiku ndi tsiku: Ndikofunikira kwambiri mu zotsukira zambiri, mankhwala osamalira khungu, ma shampoos ndi mankhwala otsukira mano, omwe angapereke mankhwalawo kutsekemera koyenera, kunyowa komanso kukhazikika.

Makampani opanga mankhwala: Pokonzekera mankhwala, hydroxyethyl cellulose nthawi zambiri amagwiritsidwa ntchito popanga mapiritsi ndi zokutira kuti azitha kutulutsa mankhwala.

Makampani a zakudya: Monga chowonjezera, chokhazikika ndi emulsifier, hydroxyethyl cellulose imagwiritsidwanso ntchito muzakudya, makamaka mu ayisikilimu, odzola ndi sauces.

Kubowola mafuta: Pobowola mafuta, hydroxyethyl cellulose ndi gawo lofunikira lamadzimadzi obowola, omwe amatha kuwonjezera kukhuthala kwamadzimadzi, kukhazikika khoma lachitsime ndikuchepetsa kutayika kwamatope.

Monga polima zakuthupi, hydroxyethyl mapadi alibe bwino kuwira mfundo chifukwa amawola pa kutentha kwambiri m'malo mwa mmene kuwira chodabwitsa. Kutentha kwake kowola nthawi zambiri kumakhala pamwamba pa 200 ° C, kutengera kulemera kwake kwa mamolekyu ndi kulowetsedwa m'malo. Komabe, hydroxyethyl mapadi amagwiritsidwa ntchito kwambiri zokutira, zodzoladzola, mankhwala, chakudya ndi mafuta chifukwa cha thickening kwambiri, gelling, emulsifying ndi stabilizing katundu. M'mapulogalamuwa, nthawi zambiri amapewa kuwonetseredwa ndi kutentha kwambiri kuti atsimikizire kuti ntchito yake ndi yokhazikika.