Hydroxypylm methylcellulose (hpmc) ndi polymer yosiyanasiyana ndi ntchito zosiyanasiyana m'mafakitale osiyanasiyana kuphatikiza mankhwala, chakudya, kapangidwe kake ndi zodzola. Zida zazikuluzikulu zomwe zimagwiritsidwa ntchito kuphatikizika HPMC ndi cellulose ndi ma propsyne oxide.
1. Cellulose: maziko a hpmc
1.1 mwachidule za cellulose
Cellulose ndi chakudya chovuta kwambiri ichi ndiye gawo lalikulu la zobiriwira zobiriwira makhoma. Ili ndi mamona am'madzi a shuga olumikizidwa pamodzi ndi β-1,4-glycosidic. Kuchuluka kwa magulu a hydroxyl mu cellulose kumapangitsa kuti zikhale zoyenera pakuphatikizika kwa cellulose zosiyanitsa zosiyanasiyana, kuphatikizapo HPMC.
1.2 Kugula kwa Cellose
Cellulose amatha kuchokera ku zida zomera zomera, monga mtengo zamkati, mabatire a thonje, kapena mbewu zina zamiyala. Pulp zamkati ndi gwero lodziwika chifukwa cha kuchuluka kwake, kugwiritsa ntchito mtengo, komanso kukhazikika. Kudulidwa kwa cellulose nthawi zambiri kumafuna kuwononga chomera kumangirirani kudzera njira zingapo zamakina ndi mankhwala.
1.3 Kuyera ndi Makhalidwe
Ukulu ndi kuyera kwa cellulose ndikofunikira kuti mudziwe mawonekedwe a HPMC yomaliza. Cellulose yoyera imawonetsetsa kuti HPMC imapangidwa ndi zinthu zosatheka monga mafakisoni, solubility ndi kukhazikika kwamatenthedwe.
2. Prosidyne oxide: Kuyambitsa hydroxypropyl gulu
2.1 Kuyamba kwa Propylene Oxide
Propyyne oxide (po) ndi organic controur ndi njira ya mankhwala c3h6o. Ndi epoxide, kutanthauza kuti ili ndi atom wa oxygen wolumikizidwa ku ma atomu awiri oyandikana ndi kaboni. Propyyne oxide ndi malo opangira synthesis a hydroxypropyl cellulose, yomwe ndi yapakati yopanga hpmc.
2.2 hydroxypypypy
Njira ya hydroxypropropropropropropropropropropropropropropropropropropropropropropropypy imakhudzanso zomwe wapasintha cellulose ndi ma propylex oxide kuti ayambitse magulu a hydroxypyl pa celluulose to by cell. Izi nthawi zambiri zimachitika pamaso pa chothandizira chofunikira. Magulu a hydroxypyl amapereka kusungunuka mosinthika ndi zinthu zina zofunika kupangira cellulose, zomwe zimayambitsa ma hydroxypropyl cellulose.
3. Methylation: kuwonjezera magulu a methyl
3.1 Njira ya UT
Pambuyo pa hydroxypylation, gawo lotsatira ku HPMC Synthesis ndi methylation. Njirayi imaphatikizapo kuyambitsa kwa methyl m'magulu am'madzi oyambira pa cellulose. Methyl chloride ndi zosintha zomwe zimagwiritsidwa ntchito kawirikawiri. Kuchuluka kwa methylation kumakhudzanso katundu wa zomaliza za HPMC, kuphatikiza ma visnion ndi mawonekedwe a gel.
3.2 digiri yapansi
Mulingo wa zolowa m'malo (DS) ndi gawo lofunikira pakutha kuchuluka kwa magalimoto (methyl ndi hydroxypropyl) pa unit unit uni unyolo. Njira yopanga imayang'aniridwa mosamala kuti mukwaniritse zomwe mukufuna kuchita za HPMC.
4. Kuyeretsa ndi kuwongolera kwapadera
4.1 Kuchotsa zinthu
Kaphatikizidwe wa HPMC imatha kubweretsa mapangidwe a zinthu monga mchere kapena ma regents osaneneka. Kuyeretsa mapangidwe kuphatikiza kutsuka ndi kufinya kumagwiritsidwa ntchito pochotsa zosayera izi ndikuwonjezera kuyera kotsiriza.
4.2 Njira Zowongolera Zowongolera
Njira zowongolera zoyenera zimakhazikitsidwa pakupanga njira yopanga kuti zitsimikizire kusasinthika ndi mtundu wa HPMC. Njira zowunikira monga sjekitrogycopy, cromamatography ndi ziphuphu zimagwiritsidwa ntchito kuwunika pazigawo monga ma celecular kulemera, digiri ya kulowetsedwa.
5. Makhalidwe a hydroxypropyl methylcellulose (hpmc)
5.1 katundu wakuthupi
HPMC ndi ufa woyera-wopanda mafuta wokhala ndi katundu wabwino kwambiri wopanga mafilimu. Ndi hygroscopic ndipo imapanga mosavuta gel yowoneka bwino ikabalalika m'madzi. Kusungunuka kwa HPMC kumadalira kuchuluka kwa malo olowa m'malo mwake ndipo kumakhudzidwa ndi zinthu monga kutentha ndi pH.
5.2 kapangidwe ka mankhwala
Kapangidwe ka mankhwala kwa HPMC kumakhala ndi msana wa cellulose ndi hydroxypropyl ndi methyl m'malo. Chiwerengero chazolowa m'malo awa, chikuwoneka muyezo wa cholowa m'malo mwake, chimatsimikiza kapangidwe kake ka mankhwala ndipo motero katundu wa HPMC.
5.3 Mafayilo ndi Zachinyengo
HPMC imapezeka m'makalasi osiyanasiyana ndi mafayilo osiyanasiyana amatuluka. Makutu a HPMC mayankho a HPMC ndi chinthu chofunikira pakugwiritsa ntchito mankhwala monga mankhwala omasulira, ndipo pomanga, komwe zimakhudza kugwirira ntchito mafoni ndi ma pastes.
5.4 Kupanga mafilimu ndi kukongola
HPMC imagwiritsidwa ntchito kwambiri ngati filimu yomwe idayamba kupangira zokutira komanso ngati wothandizila mu mitundu yosiyanasiyana. Kukula kwake kumapangitsa kuti ndizofunikira pakukula kwa mankhwala osokoneza bongo, pomwe zida zambiri zimawonjezera kapangidwe ka zinthu zambiri.
6. Kugwiritsa ntchito hydroxypropyl methylcellulose
6.1 Makampani ogulitsa mankhwala
M'makampani opanga mankhwala, HPMC imagwiritsidwa ntchito kupanga mitundu yolimba yamkamwa monga mapiritsi ndi makapisozi. Nthawi zambiri imagwiritsidwa ntchito ngati binder, dikani yolumikizira ndi filimu. Katundu wovomerezeka wa HPMC adatsogolera ntchito yake pakutulutsidwa.
6.2 Makampani Omanga
Mu gawo lomanga, HPMC imagwiritsidwa ntchito ngati wothandizira madzi, wokulirapo komanso womatira pazogulitsa za simenti. Zimalimbikitsa kugwirira ntchito kwa matope, kumalepheretsa kusaka kwa ofukula, ndikusintha magwiridwe antchito a nyumbayo.
6.3 Makampani azakudya
HPMC imagwiritsidwa ntchito mu makampani ogulitsa zakudya ngati thiccener, okhazikika ndi emulsifier. Kutha kwake kupanga ma gels kutsika kochepa kumapangitsa kuti zikhale zoyenera kugwiritsa ntchito mitundu, kuphatikizapo msuzi, zojambula ndi zakudya.
6.4 zodzikongoletsera ndi zinthu zosamalira payekha
Mu zodzikongoletsera ndi zinthu zosamalira payekha, hpmc zimapezeka pamitundu yosiyanasiyana kuphatikiza zonona, zodzola ndi shampoos. Zimathandizira kukonza mawonekedwewo, kukhazikika komanso ntchito zonse za zinthuzi.
6.5 Makampani Ena
Kusintha kwa HPMC kumafikira mafakitale ena, kuphatikizapo mapangidwe ndi zomata, komwe angagwiritsidwe ntchito ngati rifilogy yodzika, yosungira madzi ndi thickier.
7. Kumaliza
Hydroxypropylmethylcellulose ndi polima polima ndi ntchito zambiri. Chizindikiro chake chimagwiritsa ntchito cellose ndi ma propyne oxide ngati zida zazikulu zopangira, ndipo cellulose imasinthidwa kudzera mu hydroxypropropropropropropropropropropropropust ndi methylation njira. Kuwongolera kwa zinthu zopangira izi ndi zomwe zichitike zimatha kutulutsa HPMC yokhala ndi zopangidwa kuti zikwaniritse zosowa zina zamakampani. Chifukwa chake, HPMC imachita mbali yofunika kwambiri kukonza magwiridwe antchito ndi magwiridwe antchito. Kufufuza kosalekeza kwa mapulogalamu atsopano ndi kusintha kwa njira zopangira thandizo kwa HPMC Pitilizani kugwira ntchito yofunika pamsika wapadziko lonse lapansi.
Post Nthawi: Disembala-28-2023