Katundu wa Hydroxyethyl Methyl Cellulose

Hydroxyethyl Methyl Cellulose (HEMC) ndi yochokera ku cellulose yachilengedwe ya polima. Ndi polima yosungunuka m'madzi yomwe imapangidwa pambuyo posintha mankhwala ndipo imakhala ndi ntchito zambiri. Monga chofunikira chosungunuka m'madzi cha cellulose ether, chimakhala ndi zinthu zambiri zapadera zakuthupi ndi zamankhwala ndipo chimagwiritsidwa ntchito kwambiri pomanga, zokutira, zodzoladzola, chakudya ndi mankhwala.

1. Kapangidwe ka mankhwala ndi kapangidwe
Hydroxyethyl methyl cellulose ndi cellulose yosinthidwa yomwe imapangidwa ndi etherification reaction of cellulose ndi ethylene oxide (epoxy) ndi methyl chloride pambuyo pa mankhwala amchere. Kapangidwe kake ka mankhwala kumakhala ndi mafupa a cellulose ndi zolowa ziwiri, hydroxyethyl ndi methoxy. Kumayambiriro kwa hydroxyethyl kumatha kusintha kusungunuka kwake m'madzi, pomwe kuyambitsidwa kwa methoxy kumatha kusintha hydrophobicity yake, ndikupangitsa kuti ikhale yokhazikika komanso yokhazikika pamapangidwe afilimu.

2. Kusungunuka
Hydroxyethyl methyl cellulose ndi non-ionic cellulose ether yokhala ndi madzi abwino osungunuka, omwe amatha kusungunuka m'madzi ozizira ndi madzi otentha. Simakhudzidwa ndi ma ions m'madzi ikasungunuka, motero imakhala ndi kusungunuka kwabwino pansi pamadzi osiyanasiyana. Njira yowonongeka imafuna kuti iwonongeke mofanana m'madzi ozizira poyamba, ndipo patapita nthawi yotupa, njira yofanana ndi yowonekera imapangidwa pang'onopang'ono. Mu zosungunulira za organic, HEMC imawonetsa kusungunuka pang'ono, makamaka mu zosungunulira za polar monga ethanol ndi ethylene glycol, zomwe zimatha kusungunula pang'ono.

3. Viscosity
Kukhuthala kwa HEMC ndi imodzi mwazinthu zofunika kwambiri ndipo imagwiritsidwa ntchito kwambiri pakukulitsa, kuyimitsa ndi kupanga mafilimu. Kukhuthala kwake kumasintha ndi kusintha kwa ndende, kutentha ndi kumeta ubweya. Kawirikawiri, kukhuthala kwa yankho kumawonjezeka kwambiri ndi kuwonjezeka kwa ndende ya yankho. Yankho lokhala ndi ndende yapamwamba limasonyeza kukhuthala kwakukulu ndipo ndiloyenera kugwiritsidwa ntchito ngati thickener kwa zipangizo zomangira, zokutira ndi zomatira. M'kati mwa kutentha kwina, kukhuthala kwa njira ya HEMC kumachepa ndi kutentha kowonjezereka, ndipo malowa amachititsa kuti ikhale yoyenera kugwiritsira ntchito mafakitale pansi pa kutentha kosiyana.

4. Kukhazikika kwa kutentha
Hydroxyethyl methylcellulose imawonetsa kukhazikika kwamafuta pamatenthedwe apamwamba komanso imakhala ndi kukana kutentha. Nthawi zambiri, pansi pa kutentha kwakukulu (monga pamwamba pa 100 ° C), mawonekedwe ake a maselo ndi okhazikika ndipo si ophweka kuwola kapena kuwonongeka. Izi zimathandiza HEMC kuti ikhale yowonjezereka, kusunga madzi ndi kugwirizanitsa katundu m'madera otentha kwambiri m'makampani omangamanga (monga njira yowumitsa matope) popanda kukhala osagwira ntchito kwambiri chifukwa cha kusintha kwa kutentha.

5. Kukhuthala
HEMC ili ndi zokhuthala bwino kwambiri ndipo ndi yokhuthala bwino kwambiri yomwe imagwiritsidwa ntchito kwambiri pamakina osiyanasiyana opangira. Iwo akhoza mogwira kuonjezera mamasukidwe akayendedwe a amadzimadzi njira, emulsions ndi suspensions, ndipo ali wabwino kukameta ubweya kupatulira katundu. Pamitengo yotsika kwambiri, HEMC imatha kukulitsa kukhuthala kwa dongosololi, pomwe pamitengo yayitali kwambiri imawonetsa kukhuthala kocheperako, komwe kumathandizira kukonza magwiridwe antchito panthawi yogwiritsira ntchito. Kukula kwake sikungokhudzana ndi ndende, komanso kumakhudzidwa ndi mtengo wa pH ndi kutentha kwa yankho.

6. Kusunga madzi
HEMC nthawi zambiri imagwiritsidwa ntchito ngati chosungira madzi pantchito yomanga. Kusungidwa bwino kwa madzi kumatha kutalikitsa nthawi ya hydration reaction ya zinthu zopangidwa ndi simenti ndikuwongolera magwiridwe antchito ndi kumamatira kwa matope omangira. Panthawi yomanga, HEMC ikhoza kuchepetsa kutayika kwa madzi ndikupewa mavuto monga kusweka ndi kutayika kwa mphamvu chifukwa cha kuyanika kwamatope mofulumira. Kuonjezera apo, mu utoto wamadzi ndi inki, kusungirako madzi kwa HEMC kungathenso kusunga utoto wa utoto, kupititsa patsogolo ntchito yomanga utoto komanso kusalala kwa pamwamba.

7. Biocompatibility ndi chitetezo
Chifukwa HEMC imachokera ku cellulose yachilengedwe, imakhala ndi biocompatibility yabwino komanso kawopsedwe kakang'ono. Choncho, amagwiritsidwanso ntchito kwambiri pazamankhwala ndi zodzoladzola. Ikhoza kugwiritsidwa ntchito ngati mankhwala osokoneza bongo kapena osasunthika m'mapiritsi a mankhwala kuti athandize kumasulidwa kokhazikika kwa mankhwala m'thupi. Kuonjezera apo, monga thickener ndi mafilimu opanga mafilimu mu zodzoladzola, HEMC ikhoza kupereka zotsatira zowonongeka kwa khungu, ndipo chitetezo chake chabwino chimapangitsa kuti chikhale choyenera kugwiritsidwa ntchito kwa nthawi yaitali.

8. Minda yofunsira
Chifukwa cha ntchito zambiri za hydroxyethyl methylcellulose, yakhala ikugwiritsidwa ntchito kwambiri m'mafakitale ambiri:

Makampani omanga: Pazinthu zomangira monga matope a simenti, ufa wa putty, ndi zinthu za gypsum, HEMC imatha kugwiritsidwa ntchito ngati chowonjezera, chosungira madzi, ndi zomatira kuti ntchito yomanga ikhale yabwino komanso yomaliza.
Zopaka ndi inki: HEMC imagwiritsidwa ntchito kwambiri mu utoto wamadzi ndi inki monga thickener ndi stabilizer kupititsa patsogolo kusanja, kukhazikika, ndi gloss wa utoto pambuyo kuyanika.
Malo azachipatala: Monga chophatikizira, chomatira komanso chotulutsa mosalekeza m'zamankhwala, chimatha kuwongolera kuchuluka kwa mankhwala m'thupi ndikuwongolera kupezeka kwa mankhwala.
Zodzoladzola ndi zinthu zodzisamalira: Pazinthu zodzisamalira ngati mafuta odzola, mafuta odzola, ndi ma shampoos, HEMC ikhoza kugwiritsidwa ntchito ngati chowonjezera komanso chonyowa, ndipo imakhala ndi mgwirizano wabwino wa khungu ndi tsitsi.
Makampani azakudya: Muzakudya zina, HEMC itha kugwiritsidwa ntchito ngati stabilizer, emulsifier and film-forming agent. Ngakhale kuti kugwiritsidwa ntchito kwake pazakudya kuli ndi zoletsa zovomerezeka m'maiko ena, chitetezo chake chadziwika kwambiri.

9. Kukhazikika kwa chilengedwe ndi kuwonongeka
Monga bio-based material, HEMC ikhoza kuwonongeka pang'onopang'ono m'chilengedwe, ndipo njira yake yowonongeka imachitika makamaka ndi zochita za tizilombo toyambitsa matenda. Choncho, HEMC ili ndi kuipitsidwa kochepa kwa chilengedwe pambuyo pa kugwiritsidwa ntchito ndipo ndi mankhwala otetezeka kwambiri. Pansi pa chilengedwe, HEMC imatha kuwonongeka m'madzi, carbon dioxide ndi mamolekyu ena ang'onoang'ono, ndipo sichidzachititsa kuti kuwonongeka kwa nthawi yaitali mu nthaka ndi madzi.

Hydroxyethyl methylcellulose ndi chinthu chofunikira kwambiri chosungunuka m'madzi chochokera ku cellulose. Chifukwa cha mawonekedwe ake apadera a thupi ndi mankhwala monga thickening kwambiri, kusunga madzi, kukhazikika kwa kutentha ndi biocompatibility, amagwiritsidwa ntchito kwambiri m'mafakitale ambiri monga zomangamanga, zokutira, mankhwala, zodzoladzola, etc. zowonjezera zogwira ntchito mumitundu yosiyanasiyana yopangira. Makamaka m'munda komwe kuli kofunikira kukulitsa kukhuthala kwazinthu, kuwonjezera moyo wautumiki kapena kukonza magwiridwe antchito, HEMC imagwira ntchito yosasinthika. Panthawi imodzimodziyo, monga zinthu zowononga chilengedwe, HEMC yasonyeza kukhazikika bwino muzogwiritsira ntchito mafakitale ndipo ili ndi chiyembekezo chabwino cha msika.