Maitiro kuyerera kwehydroxyprusyl methylcellose

Hydroxyprupyl methylcellose (HPMC)Icho chinowanzoshandiswa mvura-soluble cellulose dellivative, inoshandiswa zvakanyanya mukuvaka, kuungana, mishonga, chikafu uye cosmetics. Maitiro ayo ekugadzira anonyanya kuoma uye anosanganisira matanho mazhinji, kunyanya kusanganisira kupaza, maitiro, kugeza, kuoma uye kupwanya uye kupwanya cellulose.

1. Kugadzirira kwezvinhu

Iko kugadzirwa kwehydroxypruppropyl methylcellose inoshandisa zvidyarwa senge matanda kana machira seyakagadzirwa semidziyo. Kutanga, cellulose inoda kubviswa kubva pane chirimwa. Iyo inobviswa cellulose inowanzoitika, yakasvibiswa, uye isina kukwana-yakabviswa kuti uwane yakacheneswa cellulose zvigadzirwa.

2. Kuvhiringidzika kwe cellulose

Cellulose ine isina kunaka solubility mumvura, saka inoda kunyungudutswa nemagetsi panguva yekugadzira maitiro. Zviitiko zvakajairika mishonga yemusanganiswa weApmonium chloride chloride chloride chloride chloride chloride Kutanga, iyo yakachena cellulose yakasanganiswa pamwe nekugadziriswa uye kurapwa pakupisa kwakanyanya kuti ive nechokwadi chekuti iyo cellulose inogona kuve yakanyungudutswa.

3. Methylation Reaction

A methylating agent (senge methyl chloride kana methyl chloride) inowedzerwa kune yakanyungudutswa cellulose yekuita methylation maitiro. Chinangwa chikuru chekuita uku ndiko kuunza methyl mapoka (-Och₃) kuumba methyl cellulose. Maitiro aya kazhinji anofanirwa kuitwa munzvimbo yeAlkaline, uye kutonga kwekutsvagisa tembiricha uye nguva ine kukosha kwakakosha pane iyo molecular chimiro uye kuita kwechigadzirwa chekupedzisira.

4. Hydroxyprupropylation Reaction

Methylated Cellalose anoenderera mberi neAcrylates (senge allyl chloride) kuti aunze hydroxpropropyl mapoka (-Och₂ch₃). This reaction is usually carried out in an alkaline solution, and the control of reaction temperature and reaction time determines the hydroxypropyl content of the product. Dhigirii yehydroxyprupropropylation yakanangana neiyo solubility, viscosity uye zvimwe zvemuviri uye zvemakemikari zvivakwa zveHPMC.

5. Kusarerekera uye kugeza

Mushure mekunge kuitwa kwapera, zvimwe zvinhu zveAlkaline kana zvisina kufanira emakemikari reacments zvinogona kuramba zviripo muhurongwa. Naizvozvo, zvakafanira kubvisa zvakawandisa alkaline zvinhu kuburikidza nekurapa kwezvinhu zvisina kurapwa. Kusarerekera kunowanzoitwa neAcid (senge acetic acid kana hydrochloric acid), uye munyu wemunyu uchagadzirwa mushure meiyo acid-base maitiro. Pashure pacho, kusvibiswa mumhinduro kunobviswa nekushambidzika kwakawanda kuti uve nechokwadi chechigadzirwa chechigadzirwa.

6. Dehydration uye kuoma

Iyo yakashambidzwa cellulose solution inoda kuve yakadzvanywa, uye kubuda kwemvura kana ultrafiltration inowanzoshandiswa kubvisa mvura. Iyo yakadzika mheremalose kumiswa ine yakanyanya kushamisika kweiyo yakaoma nyaya, uye wobva wapinda maitiro ekuoma. Iyo nzira yekuomesa inogona kupfira kuoma, vacuum kuoma kana kupisa kwemhepo kuoma. Kudzora tembiricha panguva yekuomesa maitiro yakakosha. Kunyanya kukwira tembiricha kunogona kukonzera chigadzirwa chekushambadzira kana kurasikirwa kwayo kutarisirwa kuita.

7. Kupwanya nekucheka

Iyo yakaoma hydroxyprusyl methylcellose iri mune yeupfumi fomu uye inoda kupwanywa uye inosungirirwa kudzora chigadzirwa chechigadzirwa chikamu mukati meimwe huwandu. Maitiro ekuseka anogona kuve nechokwadi chekufanana kwechigadzirwa uye bvisa kusvibiswa nezvikamu zvakakura.

8. Kutakura uye kuchengetedza

Iyo hydroxypressPropropyl methylcellose inogona kugadzirwa mune akasiyana matanho ekuputika zvinoenderana nezvinodiwa nevatengi, etc. Chigadzirwa chakarongedzwa chinofanira kuchengetwa munzvimbo yakaoma uye inotonhorera kuti udzivise tembiricha yakanyanya uye humidity.

9. Hunhu kutonga

Kudzvinyirira kwemhando yepamusoro kunodiwa pane zvese zvinongedzo mukugadzira maitiro kuti uve nechokwadi chekuti chigadzirwa chekupedzisira chinosangana nezvinodiwa. Zvinhu zvakajairika bvunzo zvinhu zvinosanganisira: solubility, viscosity, ph kukosha, isina kukwana zvinyorwa uye zvinyoro-nyoro. Zvivakwa zvechigadzirwa zvakakonzera zvakananga zvinokanganisa muminda yakasiyana yekushandisa, saka kukwidziridzwa kwemhando yepamusoro inyaya yekubatira muHydroxyproproproplulose.

Maitiro ekugadzirahydroxypruppropyl methylcelloseInosanganisira maitiro mazhinji emakemikari uye matanho ekurapa muviri, uye ane zvinodiwa zvakakwirira zvemamiriro ezvinhu. Reaction tembiricha, nguva, PP kukosha uye zvimwe zvinhu zvinofanirwa kuve zvakanyatso kudzorwa mukugadzirwa kuti uwane zvigadzirwa zvine chekuita nekuita kwakanaka. Nekufambira mberi kwesainzi uye tekinoroji uye nekuvandudza tekinoroji yekugadzira, iyo nzira yekugadzira yeHPMC iri kuramba ichivandudza, uye iyo nzvimbo yekushandisa yechigadzirwa iri kuwedzerawo.