Hydroxypropyl methylcellulose (HPMC) isanganiswa yepolymer inonyungudika nemvura inoshandiswa zvakanyanya mumaindasitiri akasiyana siyana. Iyo ine yakasarudzika yekuchengetedza mvura, kukora, firimu-kugadzira uye bonding zvivakwa. Mune akawanda maindasitiri ekushandisa, iyo yekuchengeta mvura zvivakwa zveHPMC inonyanya kukosha, kunyanya mukuvaka, ceramics, coatings uye maindasitiri emishonga. Kuita kwayo kwekuchengetedza mvura hakungogone kuvandudza mhando yechigadzirwa, asi zvakare kukwidziridza kugona mukuita kwekugadzira.
1. Chimiro chemakemikari uye kuchengetedza mvura kweHPMC
Iyo molecular chimiro cheHPMC inoumbwa nekushandurwa kwe cellulose molecular skeleton nemethylation uye hydroxypropylation. Uku kugadziridzwa kunowedzera hydrophilicity uye kunyungudika, nekudaro ichiwedzera simba rekuchengetedza mvura. Hydrogen zvisungo zvinogona kuumbwa pakati pemapoka ehydrophilic eHPMC nemamorekuru emvura, ayo anosimudzira kugona kwechinhu kushambadza uye kuchengetedza mvura. Sezvo HPMC iri yakakwira molecular polymer, cheni dzayo dzemamorekuru dzinogona kuumba network dhizaini mumvura, kutora mamorekuru emvura nekuadzivirira kubva pakubuda kana kurasikirwa nekukasira. Ichi chivakwa chinoita kuti HPMC ive yekuwedzera inodiwa mune zvakawanda zvigadzirwa zvemaindasitiri kuchengetedza kunyorova uye kushanda kushanda kwezvigadzirwa.
2. Kuchengetedzwa kwemvura muindasitiri yekuvaka
Muindasitiri yekuvaka, HPMC inowanzoshandiswa mune zvigadzirwa senge simende dhaka, gypsum-yakavakirwa zvinhu uye mataira anonamira, uye maitiro ayo ekuchengetedza mvura anokanganisa zvakananga kunaka kwekuvaka. HPMC inowedzera nguva yekushanda yesimende uye gypsum zvinhu kuburikidza nekuita kwayo kwakanakisa kwekuchengetedza mvura, kuve nechokwadi chekuti pane mvura yakakwana yekupedzisa kugadzirisa kwekurapa panguva yekuvaka. Aya anotevera mapoinzi akati wandei ekuti HPMC iite basa rekuchengetedza mvura mumunda wekuvaka:
Wedzera nguva yekushanda: HPMC inowedzera nguva inoshanda yedhaka kana gypsum slurry nekudzikamisa kubuda kwemvura, zvichibvumira vashandi vekuvaka kuti vawane nguva yakawanda yekugadzirisa uye chiyero.
Kuvandudza kurapa kwemhando: Kugadziriswa kwehunyoro kunobatsira kurapa yunifomu yesimende uye gypsum zvinhu, kudzivirira kutsemuka uye kurasikirwa kwesimba kunokonzerwa nekusakwana hunyoro.
Kuvandudza mashandiro ekubatanidza: Mumataira anonamira, HPMC inova nechokwadi chekuti hunyoro hwakakwana hunogona kuchengetwa muchikamu chekubatanidza, kuve nechokwadi chekuti inonamira inosangana zvakanaka ne substrate uye tile pamusoro isati yaoma, nekudaro ichivandudza simba rekubatanidza.
3. Kushandisa muindasitiri yeceramic
Iyo Ceramic kugadzirwa kwayo kunoda kubviswa zvishoma nezvishoma kwehunyoro kubva kune yakasvibira muviri isati yanyanya kupisa kupisa kudzivirira kutsemuka uye deformation matambudziko muchigadzirwa chakapedzwa. Semumiriri wekuchengetedza mvura uye mumiriri wekugadzira firimu, HPMC inogona kukwidziridza maitiro ekuomesa mukugadzirwa kweceramic:
Kuomeswa kwakafanana: HPMC inogona kubatsira miviri yakasvibira yeceramic kuchengetedza unyoro hwekugovera panguva yekuomeswa, kudzivirira kuputika kwepasi kana deformation inokonzerwa nekurasikirwa kwehunyoro.
Kuvandudza simba remuviri wegirinhi: Sezvo network yakaumbwa neHPMC ichigona kugovera hunyoro mukati memuviri wegirinhi, simba remuviri wegirinhi rinovandudzwa risati raoma, kuderedza njodzi yekukuvadza panguva yekufambisa kana kubata.
4. Mvura-yekuchengetedza mhedzisiro muindasitiri yekupfekedza neingi
Iko kushandiswa kweHPMC mumajasi neingi kunobatsirawo kubva kune yayo yakanaka-yekuchengetedza mvura zvivakwa. Pamvura-yakavakirwa majasi uye ingi-yakavakirwa mvura, HPMC haingogone kupa viscosity yakakodzera chete, asi zvakare kudzivirira iyo yekupfeka kubva pakuva neurombo fluidity kana kusaenzana kwemafirimu kuumbwa nekuda kwekunyanyisa evaporation yemvura panguva yekushandisa.
Kudzivirira kutsemuka: HPMC inodzivirira kutsemuka kana mapini panguva yekuomeswa kweiyo coating nekudzora evaporation mwero wemvura mujasi.
Kuvandudza kutsvedzerera kwepasi: Huwandu hwakakodzera hwekuchengetedza hunyoro hunobvumira iyo yekuputira kuti itenderere yakasikwa panguva yekuomeswa, kuve nechokwadi chepamusoro uye chisina kukanganisa.
5. Kuchengetwa kwemvura muindasitiri yemishonga
Muindasitiri yemishonga, HPMC inoshandiswa zvakanyanya mukugadzira mahwendefa, macapsules uye kumiswa kwezvinodhaka. Kuchengetedzwa kwemvura zvivakwa zveHPMC hazvingobatsire kuvandudza kugadzikana kwemuviri wezvinodhaka, asi zvakare kudzora kuburitswa kwezvinodhaka mune mamwe magadzirirwo emishonga:
Kurebesa kuburitswa kwezvinodhaka: Kuburikidza nekudyidzana nemamorekuru emvura, HPMC inogona kuumba firimu rinochengeta mvura mukugadzirira, kunonoka kuburitswa kwemushonga, nekudaro kuwana kuburitswa kwakasimba.
Kuvandudza kugadzirwa kwehwendefa: Panguva yekugadzira piritsi, HPMC inogona kuchengetedza humidity yakakodzera mutablet matrix kudzivirira mahwendefa kubva pakutyoka kana kuparuka panguva yekudzvanya nekuchengetedza.
6. Kuchengetwa kwemvura mune mamwe maindasitiri minda
HPMC inoratidzawo kuchengetwa kwemvura kwakanakisa mune mamwe maindasitiri minda. Semuenzaniso, muindasitiri yezvekudya, HPMC inowanzoshandiswa seyakakora uye inodzikamisa kudzivirira chikafu kubva pakurasikirwa nehunyoro. Muzvigadzirwa zvekuchengetedza munhu, HPMC inosimudzira ruzivo rwekushandisa kwezvigadzirwa zvekuchengetedza ganda kuburikidza nekunyorovesa maitiro. Pamusoro pezvo, mukushandiswa kwemafuta mumunda, HPMC inogona kushandiswa seyakakora uye chengetedzo yemvura yekuchera zvinwiwa kuti ive nechokwadi chekuti zvinwiwa zvekuchera zvinokwanisa kuchengetedza fluidity yavo pasi pekushisa kwepamusoro uye mamiriro ekumanikidza.
Mhedziso
Semumiriri wekuchengetedza mvura anoshanda zvakanyanya, HPMC yakaratidza kuita kwakanakisa mumhando dzakasiyana dzemaindasitiri ekushandisa kuburikidza neyakasiyana makemikari chimiro uye zvemuviri zvimiro. Haikwanise kungowedzera nguva yekushanda yezvinhu, kuvandudza kuumbwa uye kurapa kwemhando yezvigadzirwa, asi zvakare kuve nechokwadi kugadzikana kwezvigadzirwa panguva yekugadzirwa uye kushandiswa nekudzora kubuda kwemvura. Nekuenderera mberi nekudzika kwekutsvagisa nekushandiswa kweHPMC, kuita kwayo kwekuchengetedza mvura mumunda weindasitiri kuchashandiswa zvakanyanya nekuvandudzwa.
Nguva yekutumira: Sep-09-2024