Focus on Cellulose ethers

Kodi hydroxypropyl methylcellulose amapangidwa bwanji?

Hydroxypropylmethylcellulose (HPMC) ndi polima opangidwa kuchokera ku cellulose. Monga thickener, emulsifier ndi stabilizer, amagwiritsidwa ntchito kwambiri m'mafakitale azachipatala, zakudya ndi zodzikongoletsera. HPMC imagwiritsidwanso ntchito pomanga zinthu monga simenti, matope ndi gypsum kuti apititse patsogolo ntchito komanso kusunga madzi. M'nkhaniyi, tikambirana za kupanga HPMC ndi ntchito yake m'mafakitale osiyanasiyana.

Kupanga kwa HPMC

HPMC imapangidwa pochita cellulose ndi propylene oxide ndi methyl chloride pansi pamikhalidwe yamchere. Ndondomekoyi ikuphatikizapo zotsatirazi:

Gawo 1: Mankhwala amchere a cellulose

Ma cellulose amathandizidwa ndi njira ya caustic ya sodium hydroxide kuti asinthe kukhala alkaline cellulose. Kuchiza kumeneku kumapangitsa magulu a hydroxyl a cellulose kukhala otakataka, kuwongolera zomwe zimachitika.

Gawo 2: Kuchita ndi Propylene Oxide

Mu sitepe yotsatira, propylene oxide imawonjezeredwa ku cellulose yamchere pansi pa kutentha ndi kupanikizika. Zomwe zimachitikazo zimachitika pamaso pa chothandizira monga tertiary amine kapena alkali metal hydroxide. Propylene oxide imakumana ndi magulu a hydroxyl a cellulose kupanga hydroxypropyl cellulose.

Khwerero 3: Quaternization ndi Methyl Chloride

Hydroxypropylcellulose ndiye adasinthidwa ndi methyl chloride kupanga HPMC. Zomwe zimachitika ndi zinthu zamchere, ndipo kuchuluka kwa quaternization kumatha kuwongoleredwa ndikusintha kuchuluka kwa methyl chloride.

Zotsatira za HPMC zidatsukidwa, zosefedwa ndikuwumitsidwa kuti zipeze ufa woyera, wopanda madzi. The katundu wa HPMC, monga mamasukidwe akayendedwe, solubility, ndi katundu gel osakaniza, akhoza kusinthidwa posintha mlingo wa m'malo (DS) wa hydroxypropyl ndi methyl magulu.

Kugwiritsa ntchito HPMC

HPMC ali osiyanasiyana ntchito m'mafakitale osiyanasiyana. Ntchito zina zodziwika zikukambidwa pansipa:

Makampani opanga mankhwala

HPMC chimagwiritsidwa ntchito makampani mankhwala monga thickener, binder ndi filimu kale. Amagwiritsidwa ntchito popanga mapiritsi kuti azitha kutulutsa mankhwala. HPMC imagwira ntchito ngati chomangira pokanikizira ufa wosakaniza kukhala mawonekedwe olimba a mlingo. Zimathandizanso kusungunuka ndi bioavailability wa mankhwala osasungunuka bwino popanga ma dispersions okhazikika komanso ofanana.

makampani azakudya

HPMC imagwiritsidwa ntchito m'makampani azakudya monga emulsifier, thickener ndi stabilizer. Amagwiritsidwa ntchito kwambiri popanga buledi, ayisikilimu ndi mkaka. HPMC imathandizira kapangidwe kake komanso kusasinthasintha kwa zakudya poletsa kulekana kwa zosakaniza ndikuchepetsa kuphatikizika. Komanso kumawonjezera kukoma ndi alumali moyo wa zakudya.

Makampani opanga zodzoladzola

HPMC ntchito mu zodzikongoletsera makampani monga thickener ndi emulsifier. Amagwiritsidwa ntchito posamalira khungu ndi tsitsi monga mafuta odzola, mafuta odzola, ma shampoos ndi ma conditioner. HPMC imawongolera kapangidwe kazinthuzi komanso kusasinthika kwazinthuzi ndipo imapereka zabwino zokometsera komanso zowongolera.

makampani omanga

HPMC imagwiritsidwa ntchito pantchito yomanga ngati chowonjezera pa simenti, matope ndi gypsum. Imawongolera magwiridwe antchito ndi kusunga madzi azinthu izi, potero kumawonjezera mphamvu zawo komanso kulimba. HPMC imachepetsanso chiopsezo chosweka ndi kuchepa panthawi yowumitsa.

Pomaliza

Pomaliza, HPMC ndi polima yosunthika komanso yosunthika yokhala ndi ntchito m'mafakitale osiyanasiyana. Amakonzedwa ndi mankhwala amchere a cellulose, zochita ndi propylene oxide, ndi quaternization ndi methyl chloride. The katundu HPMC akhoza kuchunidwa ndi kusintha mlingo wa m'malo. HPMC imagwira ntchito yofunika kwambiri m'makampani opanga mankhwala, chakudya, zodzoladzola ndi zomangamanga powongolera kapangidwe kake, kusasinthika komanso magwiridwe antchito azinthu zosiyanasiyana. Kupanda kwake poizoni ndi biocompatibility kumapangitsa kuti ikhale yotetezeka komanso yofunikira m'mafakitale awa.


Nthawi yotumiza: Aug-03-2023
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