Kupanga hydroxypropyl methylcellulose (hpmc) kumaphatikizapo njira zingapo zovuta zomwe zimasinthiratu kupanikizana ndi ntchito yosiyanasiyana pamafakitale osiyanasiyana. Njira iyi imayamba ndi kuchotsera kwa cellulose kuchokera ku cellulose kuchokera kuzakudya zochokera kubzala, kutsatiridwa ndi mankhwala kuyambitsa hydroxypyl ndi ma medyl m'magulu am'matumbo a cellulose. Zotsatira za HPMC polima zimapereka katundu wapadera monga kukula monga kukula, kumanga, kupanga filimu, ndi kusungidwa kwamadzi. Tiyeni tisanthule mwatsatanetsatane kupanga kwa HPMC.
1.
Zolemba zoyambirira zopanga HPMC ndi cellulose, zomwe zimachokera ku magwero azomera monga mtengo zamkati, mabatani a thonje, kapena mbewu zina zamitundu. Magwero awa amasankhidwa malinga ndi zinthu monga zoyera, cellulose zomwe zili, komanso zokhazikika.
2.
Ma cellulose amachotsedwa pazinthu zosankhidwa ndi zosankhidwa kudzera mu njira zamakina ndi mankhwala. Poyamba, zopangira zopangira zimapezeka, zomwe zimaphatikizapo kusamba, kupera, ndikuwuma kuti muchotse zodetsa komanso chinyezi. Kenako, cellulose nthawi zambiri imathandizidwa ndi mankhwala monga alkalis kapena ma asidi kuti agwetse Lignin ndi Hemillilose, kusiya ma cellulose cellulose.
3.
Kusintha ndi njira yofunikira mankhwala ku HPMC kupanga, pomwe ma hydroxypropyl ndi methyl amayambitsidwa ndi msana. Izi ndizofunikira pakusintha katundu wa cellulose kuti akwaniritse ntchito zomwe mukufuna kuchita hpmc. Kuzindikira nthawi zambiri kumachitika kudzera mu zomwe zimachitika ndi ma proulup oxide (kwa ma hydroxypyl) ndi methyl chloride (za methyl chloride (magulu a methyl) pamaso pa mikhalidwe yolamulidwa ndi kutentha kwa alkali.
4..
Pambuyo pakusintha, kusakaniza komwe kumachitika kumalowerera ndale kuti muchotse caltalys yotsalira ya alkali ndikusintha pH. Izi nthawi zambiri zimachitika powonjezera acid kapena maziko kutengera zomwe mwachita. Kusalowerera kumatsatiridwa ndikutsuka bwino kuti muchotse zopangidwa ndi mankhwala, mankhwala osasinthika, ndi zodetsa ku HPMC.
5. Kusefera ndi kuyanika:
Njira yosalowerera ndi kutsukidwa HPMC imapezekanso kusefa zinthu kuti muletse tinthu tokha ndikukwaniritsa yankho. Kusanthula kumatha kumaphatikizapo njira zosiyanasiyana monga kuwombera kapena pakati. Njira yothetsera vutoli, imawuma kuti ichotse madzi ndikupeza HPMC mu mawonekedwe a ufa. Njira zouma zimatha kuphatikizapo kuyanika, kuwuma komtunda, kapena kuwuma, kutengera kukula kwa tinthu tating'onoting'ono ndi katundu womaliza.
6. Kupera ndi kupenda (posankha):
Nthawi zina, ufa wa hpmc ukhoza kuchitikanso mobwerezabwereza monga kupera kukwaniritsa tinthu tating'onoting'ono ndikusinthanso. Izi zimathandizira kupeza hpmc yokhala ndi mawonekedwe osasinthika kuti azigwiritsa ntchito magwiridwe osiyanasiyana.
7.
Nthawi yonse yonse yopanga, njira zolimbitsa thupi zolimbitsa thupi zimapangidwa kuti zitsimikizire kuti zoyera, kusasinthika, ndi magwiridwe antchito a HPMC. Magawo apadera aziwongolera amatha kuphatikizapo kufalitsa ma visccrace, kufalikira kwa tinthu, chinyezi, kuchuluka kwa zolowetsa (DS), ndi zina zoyenera. Njira zowunikira monga momwe mafayilo amalerera, spectoroscopy, cromatotography, ndi microscopy nthawi zambiri amagwiritsidwa ntchito poyeserera.
8..
Kamodzi kapangidwe ka HPMC kumadutsa mayeso owongolera, imakhazikitsidwa kukhala zotengera zoyenera monga matumba kapena ng'oma ndikulemba malinga ndi mawonekedwe. Kusunga koyenera kumathandiza kuteteza hpmc pa chinyezi kuchokera ku chinyezi, kuipitsidwa, komanso kuwonongeka kwakuthupi pakusungira ndi mayendedwe. HPMC yoyendetsedwa imasungidwa m'malo olamulidwa kuti ikhalebe bata yake ndi alumali mpaka kukonzekera kugawa ndikugwiritsa ntchito.
Ntchito za HPMC:
Hydroxypropyll methyllulose imagwiritsa ntchito kuchuluka kwa mafakitale osiyanasiyana kuphatikiza mankhwala ogulitsa, zomangamanga, chakudya, zodzola zake. Mu mankhwala opangira mankhwala, imagwiritsidwa ntchito ngati binder, disvinrant, katswiri wakale, ndi wosuta-kusungulumwa mu mawonekedwe a piritsi. Pomanga, HPMC imagwiritsidwa ntchito ngati thicker, wosunga madzi, ndi rheology osintha matope a simenti, ma plaksters, ndi matae a tiles. Mu chakudya, imagwira ntchito ngati thiccener, rukanitse, ndi emulsiferier mu zinthu monga masungu, sopo, ndi zakudya. Kuphatikiza apo, HPMC imagwiritsidwa ntchito mokongoletsa komanso zinthu zomwe zimapangidwa ndi makanema ake, zonyowa, ndi kapangidwe kake.
Maganizo a Zachilengedwe:
Kupanga kwa HPMC, monga njira zambiri zama mafakitale, zimakhala ndi tanthauzo lachilengedwe. Kuyesayesa kukuthandizani kuwongolera kukhazikika kwa ntchito za HPMC kudzera muzolinga zopangidwa ndi mphamvu, kuphatikiza matekinoloje onfologies ochezeka. Kuphatikiza apo, kukula kwa hpmc yochokera ku HPMC yochokera ku magwero okhazikika monga algae kapena kupendekera kwachipongwe kumawonetsa lonjezo pokonzanso phazi la HPMC.
Kupanga kwa hydroxypropyl ya methylcellulose kumaphatikizapo njira zingapo zoyambira pa cellulose posinthira mankhwala, kuyeretsedwa, ndi kuwongolera kwapadera. Zotsatira za HPMC polimer imapereka mphamvu zingapo ndipo zimapeza mapulogalamu m'mafakitale osiyanasiyana. Kuyesetsa Kukhazikika ndi Udindo Waolokha ukuyendetsa zojambulajambula ku HPMC, cholinga chofuna kuchepetsa chilengedwe chake pokumana ndi kuchuluka kwa polimatu.
Post Nthawi: Mar-05-2024