Propylene glycol chinhu chaunowanzoona pane runyorwa rwezvishandiso zvezvizoro zvinoshandiswa zuva nezuva. Zvimwe zvakanyorwa se1,2-propanediol uye zvimwe se1,3-propanediol, saka musiyano wacho chii?
1,2-Propylene glycol, CAS Nhamba 57-55-6, molecular formula C3H8O2, chinhu chinoshandiswa nemakemikari, chinogona kusanganiswa nemvura, ethanol nezvimwe zvinonyungudutsa zvakawanda. Imvura isina ruvara, ine viscous iri mumamiriro akajairika, inenge isina hwema uye inotapira zvishoma pakunhuhwirira kwakanaka.
Inogona kushandiswa semushonga wekunyorovesa muzvizoro, mushonga wemazino nesipo pamwe chete neglycerin kana sorbitol. Inoshandiswa semushonga wekunyorovesa uye wekuenzanisa mudhayi dzebvudzi uye semushonga unodzivirira kutonhora.
1,3-Propyleneglycol, CAS Nhamba 504-63-2, fomura yemamorekuru ndeye C3H8O2, mvura isina ruvara, isina hwema, ine munyu, ine hygroscopic viscous, inogona kusanganiswa, kusanganiswa, kusanganiswa nemvura, kusanganiswa mu ethanol, ether.
Inogona kushandiswa mukugadzira mishonga yakasiyana-siyana, polyester PTT itsva, mishonga yemishonga uye ma antioxidants matsva. Ndiyo chinhu chakakosha pakugadzira polyester isina kuguta, plasticizer, surfactant, emulsifier uye emulsion breaker.
Ose ane fomura imwe chete yemamorekuru uye ma isomers.
1,2-Propylene glycol inoshandiswa semushonga unorwisa mabhakitiriya kana chinhu chinokurudzira kupinda muzvizoro zvine huwandu hwakawanda.
Kana yakawandisa, inowanzo shandiswa semushonga wekuchenesa kana semushonga wekuchenesa.
Kana paine huwandu hwakaderera, inogona kushandiswa sechinhu chinobatsira pakugadzira zvinhu zvinoshanda.
Kutsamwiswa kweganda uye kuchengetedzeka kwaro pahuwandu hwakasiyana zvakasiyana zvachose.
1,3-Propylene glycol inonyanya kushandiswa semushonga wezvizoro. Imushonga wepolyol unonyorovesa unobatsira zvinhu zvekushongedza kupinda muganda.
Ine simba guru rekunyorovesa kupfuura glycerin, 1,2-propanediol uye 1,3-butanediol. Haina kunamira, hainzwi kupisa, uye haina matambudziko ekutsamwa.
Nzira huru dzekugadzira 1,2-propanediol ndeidzi:
1. Nzira yekunyorovesa propylene oxide;
2. Nzira yePropylene yakananga catalytic oxidation;
3. Nzira yekuchinjana Ester; 4. nzira yekugadzira glycerol hydrolysis.
1,3-Propylene glycol inonyanya kugadzirwa ne:
1. Nzira yeAcrolein yemvura;
2. Nzira ye ethylene oxide;
3. Nzira yekugadzira Glycerol hydrolysis;
4. Nzira yekuongorora zvipembenene.
1,3-Propylene glycol inodhura kupfuura 1,2-Propylene glycol.1,3-Propyleneglycol yakaoma kugadzira uye ine goho rakaderera, saka mutengo wayo uchiri wakakwira.
Zvisinei, mamwe mashoko anoratidza kuti 1,3-propanediol hainyanyi kutsamwisa uye hainyanyi kurwadza ganda kupfuura 1,2-propanediol, kunyange kusvika padanho rekusaita zvakanaka.
Saka, mumakore achangopfuura, vamwe vagadziri vakatsiva 1,2-propanediol ne1,3-propanediol muzvinhu zvekushongedza kuti vaderedze kusagadzikana kunogona kuitika paganda.
Kusagadzikana kweganda kunokonzerwa nezvizoro kunogona kunge kusiri iko kunokonzerwa ne1,2-propanediol kana 1,3-propanediol chete, asi kunogonawo kukonzerwa nezvinhu zvakasiyana-siyana. Sezvo pfungwa yevanhu yehutano nekuchengetedzeka kwezvizoro ichikura, kudiwa kwakasimba kwemusika kuchaita kuti vagadziri vazhinji vagadzire zvigadzirwa zviri nani kuti zvizadzise zvinodiwa nevakawanda vanoda runako!
Nguva yekutumira: Gunyana-29-2021