Iyo isina kudzika musanganiswa, iyo inoita basa rakakosha mukuvandudza mashandiro ekuvaka yakaoma-yakasanganiswa dhaka, inodarika 40% yemutengo wezvinhu mudhaka rakaoma-musanganiswa. Mazhinji ezvakasanganiswa mumusika wepamba zvinopihwa nevagadziri vekunze, uye iyo referensi dosage yezvigadzirwa inopihwawo nevanopa. Mutengo wekuoma-musanganiswa wedhaka chigadzirwa unoramba wakakwira nekudaro, uye zvakaoma kuparadzira zvakajairika masonry uye kupurasita dhaka nehuwandu hukuru uye hwakasiyana. Zvigadzirwa zvemusika zvemhando yepamusoro zvinodzorwa nemakambani ekunze, uye vagadziri vedhaka vakaoma-musanganiswa vane purofiti yakaderera uye mutengo wakashata; mashandisirwo emusanganiswa anoshaya kurongeka uye kwakanangwa tsvagiridzo, uye neupofu kunotevera mafomula ekunze. Pano, izvo zvatinogovana newe ndezvekuti, ndeipi basa rehydroxypropyl methylcellulose mune zvakajairika zvakasanganiswa zvevhu rakaoma-rakasanganiswa dhaka?
Hydroxypropyl methylcellulose imhando ye cellulose iyo kubuda kwayo uye kushandiswa kwave kuwedzera nekukurumidza mumakore achangopfuura. Hydroxypropyl methylcellulose inogadzirwa nedonje rakanatswa mushure mekurapa alkalization, uchishandisa propylene oxide uye methyl chloride se etherification agents, isiri-ionic cellulose yakasanganiswa ether yakagadzirwa kuburikidza neakatevedzana maitiro. Dhigirii rekutsiva kazhinji 1.2 ~ 2.0. Zvimiro zvayo zvakasiyana zvichienderana nehuwandu hwemethoxyl yemukati uye hydroxypropyl yemukati. Maitiro ehydroxypropyl methylcellulose ndeaya anotevera:
1. Hydroxypropyl methylcellulose inonyungudika nyore nyore mumvura inotonhora, uye ichasangana nematambudziko mukunyungudika mumvura inopisa. Asi tembiricha yayo yegelation mumvura inopisa yakanyanya kukwirira kupfuura yemethyl cellulose. Iyo solubility mumvura inotonhora zvakare yakagadziridzwa zvakanyanya kana ichienzaniswa nemethyl cellulose.
2. Iyo viscosity yehydroxypropyl methylcellulose inoenderana neiyo molecular uremu. Iyo yakakura iyo molecular uremu, iyo yakakwirira viscosity. Kupisa kunokanganisawo viscosity yayo, sezvo tembiricha inowedzera, viscosity inoderera. Nekudaro, pesvedzero yeayo yakakwirira viscosity uye tembiricha yakaderera pane iyo yemethyl cellulose. Mushonga waro wakagadzikana kana wakachengetwa pakushambidzika kwekamuri.
3. Kuchengetwa kwemvura yehydroxypropyl methylcellulose kunoenderana nehuwandu hwayo hwekuwedzera, viscosity, nezvimwewo, uye chiyero chekuchengetedza mvura pasi pehuwandu hwekuwedzera hunopfuura hwemethyl cellulose.
4. Hydroxypropyl methylcellulose yakagadzikana kune acid uye alkali, uye mhinduro yayo yemvura yakanyatsogadzikana muhuwandu hwepH = 2 ~ 12. Caustic soda uye mvura yeraimu haina mhedzisiro pakuita kwayo, asi alkali inogona kukurumidzira kuparara kwayo uye kuwedzera zvishoma viscosity yayo. Hydroxypropyl methylcellulose yakagadzikana kune yakajairwa munyu, asi kana kusanganiswa kwemunyu munyu kwakakwira, viscosity yehydroxypropyl methylcellulose mhinduro inowedzera kuwedzera.
5. Hydroxypropyl methylcellulose inogona kusanganiswa nemvura-soluble polymers kuti iite yunifomu uye yakakwirira viscosity solution. Zvakadai se polyvinyl doro, starch ether, muriwo gum, nezvimwe.
6. Hydroxypropyl methylcellulose ine nani enzyme kuramba kupfuura methylcellulose, uye mukana we enzymatic degradation yemhinduro yayo yakaderera kupfuura yemethylcellulose.
7. Kusungirirwa kwehydroxypropyl methylcellulose kune dhaka rekuvaka yakakwirira kudarika iyo methylcellulose.
Nguva yekutumira: Chivabvu-09-2023