Hydroxypropyl methylcellulose (HPMC) chinhu chakakosha chemakemikari chinowedzera, chinoshandiswa zvakanyanya mundima dzakawanda sekuvaka, mushonga, chikafu, uye zvizorwa. Iyo ine yakanaka thickening, gelling, emulsifying, film-forming, uye bonding zvivakwa, uye ine kumwe kugadzikana kune tembiricha uye pH. Iyo solubility yeHPMC ndiyo imwe yenyaya dzakakosha mukushandiswa kwayo. Kunzwisisa nzira chaiyo yekubvisa kwakakosha kuti uve nechokwadi chekuita kwayo.
1. Basic dissolution zvimiro zveHPMC
Hydroxypropyl methylcellulose is non-ionic water-soluble cellulose ether inogona kunyungudutswa mumvura inotonhora kana inopisa kuti iite inoonekera kana translucent viscous solution. Kunyungudika kwayo kunonyanya kukanganiswa nekupisa. Zviri nyore kunyungudika mumvura inotonhora uye nyore kugadzira colloid mumvura inopisa. HPMC ine thermal gelation, kureva kuti, ine hurombo hwekunyungudika pakudziya kwepamusoro, asi inogona kunyungudika zvachose kana tembiricha yadzikiswa. HPMC ine huremu hwakasiyana hwemamorekuru uye viscosities, saka panguva yekuparara, iyo yakakodzera HPMC modhi inofanirwa kusarudzwa zvinoenderana nezvinodiwa zvechigadzirwa.
2. Disolution nzira yeHPMC
Nzira yekuparadzira mvura inotonhora
Cold water dispersion method ndiyo inonyanya kushandiswa HPMC dissolution method uye yakakodzera kune akawanda application scenarios. Matanho chaiwo ndeaya anotevera:
Gadzirira mvura inotonhora: Dururira huwandu hunodiwa hwemvura inotonhora mumudziyo wekusanganisa. Tembiricha yemvura inowanzokurudzirwa kuti ive pasi pe40°C kudzivirira HPMC kubva pakugadzira mapundu pakupisa kwakanyanya.
Zvishoma nezvishoma wedzera HPMC: Zvishoma nezvishoma wedzera HPMC poda uye ramba uchikurudzira. Kuti udzivise kusanganiswa kwehupfu, kumhanya kwakakodzera kunofanirwa kushandiswa kuve nechokwadi chekuti HPMC inogona kuparadzirwa zvakaenzana mumvura.
Kumira nekunyunguduka: Mushure mekunge HPMC yaparadzirwa mumvura inotonhora, inoda kumira kwenguva yakati kuti iparare zvachose. Kazhinji, inosiiwa yakamira kwemaminetsi makumi matatu kusvika maawa akati wandei, uye nguva chaiyo inosiyana zvichienderana neHPMC modhi uye tembiricha yemvura. Munguva yekumira, HPMC inonyungudika zvishoma nezvishoma kuti iite viscous mhinduro.
Mvura inopisa pre-dissolution nzira
Iyo inopisa mvura isati yanyungudutswa nzira inokodzera mamwe emhando dzeHPMC ane yakakwira viscosity kana yakaoma kunyungudika zvachose mumvura inotonhora. Iyi nzira ndeyekutanga kusanganisa hupfu hweHPMC nechikamu chemvura inopisa kuti uite paste, wozoisanganisa nemvura inotonhora kuti uwane mhinduro yakafanana. Matanho chaiwo ndeaya anotevera:
Kudziisa mvura: Pisa imwe mvura kusvika pa80°C woidira mumudziyo wokusanganisa.
Kuwedzera HPMC hupfu: Dururira hupfu hweHPMC mumvura inopisa uye kurunga uchidira kuti uite musanganiswa wepaste. Mumvura inopisa, HPMC ichanyungudika kwechinguva uye kugadzira chinhu chakafanana nejeli.
Kuwedzera mvura inotonhora kuti inyungurudze: Mushure mekunge musanganiswa wepaste watonhora pasi, zvishoma nezvishoma wedzera mvura inotonhora kuti uinyungurudze uye rambai muchikurunga kusvika yanyungudika zvachose mugaba rinoonekera kana kuti translucent solution.
Organic solvent dispersion method
Dzimwe nguva, kuitira kukurumidzira kuparara kweHPMC kana kunatsiridza kunyungudika kwemamwe maapplication akakosha, organic solvent inogona kushandiswa kusanganisa nemvura kunyungudutsa HPMC. Semuenzaniso, organic solvents senge ethanol uye acetone inogona kushandiswa kuparadzira HPMC kutanga, uye ipapo mvura inogona kuwedzerwa kubatsira HPMC kunyungudika nekukurumidza. Iyi nzira inowanzoshandiswa mukugadzirwa kwezvimwe zvinonyungudutsa-based products, zvakadai sekuputira uye pendi.
Dry kusanganisa nzira
Iyo yakaoma yekusanganisa nzira yakakodzera kune yakakura-yakakura kugadzirwa kwemaindasitiri. HPMC inowanzooma isati yaoma yakasanganiswa nezvimwe zvinhu zvehupfu (sesimende, gypsum, nezvimwewo), uyezve mvura inowedzerwa kusanganiswa kana yashandiswa. Iyi nzira inorerutsa nhanho dzekushanda uye inodzivirira dambudziko rekubatanidza kana HPMC yanyungudika yega, asi inoda kubvongodza kwakakwana mushure mekuwedzera mvura kuve nechokwadi chekuti HPMC inogona kunyungudika zvakaenzana uye kuita basa rekukora.
3. Zvinhu zvinokanganisa HPMC kuparara
Tembiricha: Kunyungudika kweHPMC kunonzwa zvakanyanya kune tembiricha. Tembiricha yakaderera inokodzera kupararira kwayo uye kunyungudika mumvura, nepo tembiricha yakakwira inokonzeresa kuti HPMC iite colloids, ichitadzisa kupera kwayo zvachose. Naizvozvo, inowanzokurudzirwa kushandisa mvura inotonhora kana kudzora tembiricha yemvura iri pasi pe40 ° C pakunyungudutsa HPMC.
Kumhanyisa kumhanya: Kukurudzira kwakaringana kunogona kudzivirira HPMC agglomeration, nekudaro ichimhanyisa mwero wekunyungudika. Nekudaro, kukurumidza kumhanyisa kumhanya kunogona kuunza huwandu hukuru hwemabhuru uye kukanganisa kufanana kwemhinduro. Naizvozvo, mukushanda chaiko, kumhanya kwakakodzera uye midziyo inofanira kusarudzwa.
Hunhu hwemvura: Kusachena, kuoma, pH kukosha, nezvimwe mumvura zvinokanganisa kunyungudika kweHPMC. Kunyanya, calcium uye magnesium ions mumvura yakaoma inogona kuita neHPMC uye inokanganisa kunyungudika kwayo. Naizvozvo, kushandisa mvura yakachena kana mvura yakapfava kunobatsira kuvandudza kuparara kweHPMC.
HPMC modhi uye huremu hwemamorekuru: Mhando dzakasiyana dzeHPMC dzinosiyana mukumhanya kwekunyungudika, viscosity uye tembiricha yekunyungudika. HPMC ine high molecular uremu inonyungudika zvishoma nezvishoma, ine high solution viscosity, uye inotora nguva yakareba kuti inyunguduke zvachose. Kusarudza iyo chaiyo HPMC modhi inogona kuvandudza kuparara kwekuita uye kusangana nezvinodiwa zvakasiyana zvekushandisa.
4. Matambudziko akajairika uye mhinduro mukuparara kweHPMC
Dambudziko reAgglomeration: Kana HPMC yakanyungudutswa mumvura, agglomerations inogona kuumba kana hupfu husina kuparadzirwa zvakaenzana. Kuti udzivise dambudziko iri, HPMC inofanira kuwedzerwa zvishoma nezvishoma panguva yekuparara uye kuchengetedzwa panguva yakakodzera inokurudzira, ichidzivisa kuwedzera HPMC poda pakupisa kwakanyanya.
Mhinduro isina kuenzana: Kana kubvongodza kusina kukwana kana kuti nguva yekumira isina kukwana, HPMC inogona kunge isina kunyungudika zvachose, zvichikonzera mhinduro isina kuenzana. Panguva ino, nguva yekukurudzira inofanira kuwedzerwa kana nguva yekumira inofanira kuwedzerwa kuti ive nechokwadi chekuparara kwakakwana.
Dambudziko reBubble: Kukurumidza kubvongodza kana tsvina mumvura inogona kuunza huwandu hukuru hwemabhuru, zvichikanganisa kunaka kwemhinduro. Nechikonzero ichi, zvinokurudzirwa kudzora kumhanya kunomutsa kana kunyungudika HPMC kudzivirira mabhuru akawandisa, uye kuwedzera defoamer kana zvichidikanwa.
Kuparara kweHPMC ndicho chinongedzo chakakosha mukushandisa kwayo. Kuziva nzira chaiyo yekumisa kunobatsira kuvandudza kunaka kwechigadzirwa uye kugona kugadzira. Zvinoenderana nemhando dzakasiyana dzeHPMC uye zvinodiwa zvekushandisa, kupararira kwemvura inotonhora, mvura inopisa isati yaparara, organic solvent dispersion kana kusanganiswa kwakaoma kunogona kusarudzwa. Panguva imwecheteyo, kutarisisa kunofanirwa kubhadharwa kune kudzora zvinhu senge tembiricha, kukurumidza kukurumidza uye kunaka kwemvura panguva yekunyungudutswa kudzivirira matambudziko akadai seagglomeration, mabhubhu uye kupera kusina kukwana. Nekugadzirisa mamiriro ekuparara, inogona kuve nechokwadi chekuti HPMC inogona kupa kutamba kwakazara kune kukora kwayo uye kugadzira mafirimu, ichipa mhinduro dzemhando yepamusoro dzeakasiyana maindasitiri uye emazuva ese maapplication.
Nguva yekutumira: Sep-30-2024