Methylcellose (MC) ipoluble polymer yakawedzera kushandiswa mukudya, mushonga, makemikari ezuva nezuva, kuvaka uye mamwe maindasitiri. Maitiro ayo ekugadzira anosanganisira matanho mazhinji, kunyanya kusanganisira cellulose kubviswa, kugadzirisa maitiro, kuoma uye kupwanya.
1. Kubvisa cellulose
Iyo yekutanga methylcellose ndeyechisikirwo cellulose, iyo inowanzove inowanikwa kubva kune huni protp kana machira. Kutanga, huni kana machira anoiswa pasi petsotsi yekuregerera kubvisa tsvina (yakadai lignin, resin, protein, etc.) kuwana cellulose cellulose. Nzira dzakajairika dzekuratidzira dzinosanganisira acid-base nzira uye nzira ye enzymatic. Mucid-base nzira, huni kana machira kana machira anobatwa ne sodium hydroxide (naoh) kana imwe nzira yekunyora yekunyungudika nekumwe kusvibiswa, nekudaro kubvisa cellulose.
2. Etified maitiro e cellulose
Tevere, kuitisa methycation yekuita Nhanho yepakati yeiyo ertheifitifitifitification yekuita cellulose ine methylating agent (kazhinji methyl chloride, methyl iodide, etc.) kuti uwane methylceose. Iko kushanda kwakananga kuri seinotevera:
Sarudzo yeCistical Solvent: Yakadai semvura, ethanol kana yakasanganiswa yemvura uye nedoro (senge sodium hydroxide) dzimwe nguva dzinowedzerwa kugadzirisa basa rekugadzirisa.
Maitiro Ekuita Munguva yekuita, methyl chloride inosangana neiyo hydroxyl (-OOOH) boka muCellulose Molecule kuti dzishandure kuita methyl cellulose.
Reaction Kudzora: Iyo Methylation Reaction inoda chaizvo kudzora kwekuita nguva uye tembiricha. Kwakareba nguva yekuita nguva kana yakanyanya kupisa inogona kukonzera kuora kwemheremalose yekushambadzira, nepo yakaderera tembiricha kana isina kukwana yekuita kuti iite kuti isimbe methylation, inokanganisa mashandiro emethyl cellelose.
3. Kusaruramisa uye kuchenesa
Mushure mekunge kuitwa kwacho kwapera, kusarongeka methylation methyst Maitiro ezvekusarerekera kazhinji anoshandisa mhinduro ye acidic (senge acetic acid solution) kuti adzorekesa zvinhu zveAlkaline mune reaction yechigadzirwa. Maitiro ekuchenesa anoshandisa huwandu hukuru hwemvura kana doro kuti ubvise solventes, isina kugadziriswa makemikari uye ne-zvigadzirwa mushure mekuita kuti kuve nekuchena kwechigadzirwa chekupedzisira.
4. Kuomesa uye kupwanya
Mushure mekugeza, methylcellose inowanzove mune iyo paste kana gel State, saka inoda kuomeswa kuti uwane chigadzirwa chepepa. Pane nzira dzakawanda dzekuoma, uye izvo zvinowanzoshandiswa zvinosanganisira kupfira kupfava, kusunungura kuoma uye kuomesa. Munguva yekuomesa maitiro, tembiricha uye humidity inoda kuve yakanyatso kudzorwa kuti udzivise kuora yakakonzerwa nekudziya kwakanyanya kana kukuvara kune iyo gel zvivakwa.
Mushure mekuoma, iyo yakawanikwa methylcellose inoda kupwanywa kuti izadzise iyo inodiwa subsle size. Maitiro ekupwanya anowanzopedzwa nemhepo jethling kana mechaniki yekugaya. Nekudzora saizi yehukuru, iyo yekunyorovesa chiyero uye zvimiro zveviscossity yemethylcellose inogona kugadziriswa.
5. Kuongorora uye kurongedza kwechigadzirwa chekupedzisira
Mushure mekupwanya, methylcellestulose inoda kudzora mhando yekudzora kuti ive nechokwadi chekuti inosangana nezvinyorwa zvehunyanzvi. Zvinhu zvakajairika zvinhu zvinosanganisira:
Unyoro hwekunyoroveswa: Kwakanyanya kunyorovesa zvemukati wemethylcellose anozokanganisa kugadzikana kwayo uye kuchengetedza.
Particle saizi kugoverwa: Saizi uye kugoverwa kwezvikamu zvinokanganisa iyo solubility yemethylcellose.
Degree of Methylation: Dhigirii yemumbiniki ndiyo yakakosha chiratidzo chekuongorora mhando ye methylcellose, inokanganisa iyo yekunyora kwayo uye kushanda kwayo kwekushandisa.
Solubility uye viscosity: Iyo solubility uye visulogity ye methylcellose yakakosha parameter mukushandisa kwayo, kunyanya mumunda wekudya nemushonga.
Mushure mekuda kuongorora, chigadzirwa chacho chicharongedzwa zvichienderana nezvinodiwa zvakasiyana, kazhinji mumabhegi epurasitiki kana mapepa emapepa, uye akaiswa mucherechedzo webheti, ruzivo, ruzivo rwechigadzirwa.
6. Kudzivirirwa kwezvakatipoteredza uye kuchengeteka
Munguva yekugadzirwa kweMethyl Cellalose, yakakodzera dziviriro dzekudzivirira dzinoda kutorwa, kunyanya kumakemikari uye solvent inoshandiswa mukuita maitiro. Mushure mekuita, marara emvura uye marara gasi anofanira kurapwa kuti arege kusvibisa nharaunda. Uye zvakare, makemikari reagents mugadziriro yekugadzira inofanirwa kuitwa zvakanyatsoitwa zvinoenderana nemaitiro ekuchengetedza ekushandisa kuti ave nechokwadi chekuchengetedza vashandi.
Maitiro ekugadzira methyl cellelose anonyanya kusanganisira Cellulose Exction, methylation maitiro, kugeza uye kusarerekera, kupwanya uye kupwanya uye kupwanya. Kubatanidza kwega kwega kune chakakosha kukanganiswa kwehunhu hwechigadzirwa chekupedzisira, saka kutonga uye kuongorora mukugadzira maitiro ekugadzira. Kuburikidza nemaitiro aya matanho, methyl cellalose iyo inosangana nezvinodiwa zvekushandisa zvinoshandiswa zvinogona kugadzirwa.
Kutumira Nguva: Kukadzi-19-2025