Hydroxypropyl methylcellulose (HPMC) chinhu chinoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana nekuda kwekugadzirwa kwayo kwakasiyana kwemakemikoro uye hunhu hwayo.
1. Kuumbwa kwemakemikari:
a. Musana weCellulose:
HPMC imhando ye cellulose derivative, zvinoreva kuti inobva ku cellulose, polysaccharide yechisikigo inowanikwa mumadziro emasero emiti. Cellulose ine mayuniti anodzokororwa e β-D-glucose akabatanidzwa ne β(1→4) glycosidic bonds.
b. Kutsiva:
MuHPMC, chikamu chehydroxyl (-OH) chemusana we cellulose chinotsiviwa nemapoka emethyl nehydroxypropyl. Kutsiviwa uku kunoitika kuburikidza ne etherification reaction. Dhigirii rekutsiviwa (DS) rinoreva huwandu hwemapoka ehydroxyl anotsiviwa payuniti yega yega yeglucose mu cellulose chain. DS yemapoka emethyl nehydroxypropyl akasiyana, izvo zvinokanganisa mashandiro eHPMC.
2. Kugadzirwa:
a. Kugadziriswa kweEther:
HPMC inogadzirwa kuburikidza ne etherification reaction ye cellulose ne propylene oxide ne methyl chloride. Maitiro aya anosanganisira reaction cellulose ne propylene oxide kuti iunze hydroxypropyl groups uye wozobva waisa methyl chloride kuti iunze methyl groups.
b. Dhigirii rekutonga kwakasiyana:
DS yeHPMC inogona kudzorwa nekugadzirisa mamiriro ekuita senge tembiricha, nguva yekuita, uye huwandu hwe reactant.
3. Kushanda:
a. Kunyunguduka:
HPMC inonyungudika mumvura uye mune zvimwe zvinonyungudutsa zvakasikwa, zvakaita semethanol neethanol. Zvisinei, kunyungudika kwayo kunoderera nekuwedzera kwehuremu hwemamorekuru uye mwero wekutsiva.
b. Kugadzirwa kwemafirimu:
HPMC inoita firimu rinoonekera uye rinochinjika kana rakanyungudutswa mumvura. Mafirimu aya ane simba rakanaka remuchina uye ane hunhu hwekudzivirira.
C. Kusviba:
Mhinduro dzeHPMC dzinoratidza maitiro epseudoplastic, zvichireva kuti viscosity yadzo inoderera nekuwedzera kwehuwandu hwekuchekwa. Viscosity yemhinduro dzeHPMC inoenderana nezvinhu zvakaita sehuwandu, huremu hwemamorekuru, uye mwero wekutsiva.
d. Kuchengetwa kwemvura:
Chimwe chezvinhu zvakakosha zveHPMC kugona kwayo kuchengetedza mvura. Izvi zvakakosha mukushandiswa kwakasiyana-siyana senge zvinhu zvekuvaka, uko HPMC inoshandiswa sechinhu chinosimbisa uye chinochengetedza mvura.
e. Kunamira:
HPMC inowanzoshandiswa sechinamira mumaindasitiri akasiyana-siyana nekuda kwekugona kwayo kuumba zvisungo zvakasimba kune substrates dzakasiyana.
4. Kushandiswa:
a. Indasitiri yemishonga:
Mumishonga, HPMC inoshandiswa semushonga wekubatanidza, musanganiswa wekupenda firimu, musanganiswa wekubvisa ganda wakadzorwa, uye musanganiswa we viscosity mumafomu emapiritsi.
b. Indasitiri yekuvaka:
HPMC inowedzerwa kumamortar akagadzirwa nesimende, maplaster akagadzirwa negypsum uye zvinonamira zvemataira kuti zvishande zvakanaka, kuchengetedza mvura uye kunamira.
C. indasitiri yezvekudya:
Muindasitiri yezvekudya, HPMC inoshandiswa sechinhu chinosimbisa, chinosimbisa uye chinosanganisa zvinhu zvakaita semasosi, madhirowa uye ice cream.
d. Zvigadzirwa zvekuchengetedza muviri:
HPMC inoshandiswa sechinhu chinosimbisa, chinosanganisa mafuta uye chinogadzira firimu muzvigadzirwa zvekuchengetedza muviri zvakaita semashampoo, mafuta ekuchenesa uye makirimu.
e. Pendi neMapendi:
Mumapendi nependi, HPMC inoshandiswa kuvandudza kupararira kwepigment, kudzora viscosity uye kuchengetedza mvura.
Hydroxypropylmethylcellulose (HPMC) chinhu chinoshandiswa zvakasiyana-siyana chine mashandisirwo akasiyana-siyana mumaindasitiri akasiyana-siyana. Kuumbwa kwayo kwakasiyana kwemakemikoro, kugadzirwa kwayo uye hunhu hwayo zvinoita kuti ive chinhu chakakosha mumishonga, zvinhu zvekuvaka, chikafu, zvigadzirwa zvekuchengetedza muviri uye pendi/machira. Kunzwisisa hunhu hweHPMC kunobvumira mashandisirwo akagadzirwa muzvikamu zvakasiyana, zvichibatsira mukushandiswa kwayo kwakapararira uye kukosha mumabasa emazuva ano ekugadzira.
Nguva yekutumira: Kukadzi-22-2024