Pfupiso: inonzi HPMC, upfu huchena kana husina kuchena hwe fibrous kana granular. Kune mhando dzakawanda dze cellulose uye dzinoshandiswa zvakanyanya, asi tinonyanya kusangana nevatengi vari muindasitiri yezvinhu zvekuvaka zveupfu hwakaoma. Cellulose inonyanya kushandiswa inoreva hypromellose.
Maitiro ekugadzira: Zvinhu zvikuru zveHPMC: donje rakacheneswa, methyl chloride, propylene oxide, zvimwe zvinhu zvinosanganisira flake alkali, acid, toluene, isopropanol, nezvimwewo. Isa cotton cellulose yakacheneswa nealkali solution pa35-40℃ kwehafu yeawa, dzvanya, pwanya cellulose, uye gadzira zvakanaka pa35℃, kuitira kuti avhareji yepolymerization yealkali fiber yakawanikwa ive mukati mehuwandu hunodiwa. Isa alkali fibers mukettle ye etherification, wedzera propylene oxide nemethyl chloride, uye etherify pa50-80 °C kwemaawa mashanu, nekumanikidzwa kwakanyanya kweinenge 1.8 MPa. Wobva wawedzera huwandu hwakakodzera hwehydrochloric acid ne oxalic acid mumvura inopisa pa90 °C kuti usuke zvinhu kuti uwedzere vhoriyamu. Suka nemvura ne centrifuge. Geza kusvika yakamira, uye kana hunyoro huri muzvinhu hwava pasi pe60%, huome nemhepo inopisa pa130°C kusvika pasi pe5%. Basa: kuchengetedza mvura, kukora, thixotropic inodzivirira kudonha, kushanda zvakanaka kwemhepo, kugadzirisa kunonoka.
Kuchengetwa kwemvura: Kuchengetwa kwemvura ndicho chinhu chinonyanya kukosha che cellulose ether! Mukugadzirwa kwe putty gypsum mortar nezvimwe zvinhu, kushandiswa kwe cellulose ether kwakakosha. Kuchengetwa kwemvura yakawanda kunogona kuita zvizere simende ash uye calcium gypsum (kana mhinduro yacho yakazara, simba rayo rinowedzera). Mumamiriro akafanana, kana viscosity ye cellulose ether yakakwira, kuchengetedza kwemvura kuri nani (mukana uri pamusoro pe 100,000 viscosity unoderedzwa); kana dosage yakakwira, kuchengetedza kwemvura kuri nani, kazhinji huwandu hushoma hwe cellulose ether hunogona kuvandudza zvikuru mashandiro emortar. Kuchengetwa kwemvura, kana huwandu hwayo hwasvika padanho rakati, maitiro ekuwedzera kwekuchengetedza mvura anononoka; kuchengetwa kwemvura kwe cellulose ether kunowanzo kudzikira kana tembiricha yemhepo ikawedzera, asi mamwe ma high-gel cellulose ethers anewo mashandiro ari nani mumamiriro ekupisa kwakanyanya. Kuchengetwa kwemvura. Kupararira pakati pemamorekuru emvura nemaketani emamorekuru e cellulose ether kunoita kuti mamorekuru emvura apinde mukati memaketani emamorekuru e cellulose ether uye agamuchire simba rakasimba rekusunga, nokudaro achigadzira mvura yakasununguka, achibatanidza mvura, uye achivandudza kuchengetwa kwemvura kwe slurry yesimende.
Kukora, thixotropic uye kurwisa kusagwa: kunoita kuti simbi iwedzere kunaka kusimbi yakanyorova! Inogona kuwedzera zvakanyanya kubatana pakati pesimbi yakanyorova nechigadziko, uye inovandudza mashandiro esimbi inodzivirira kusagwa. Kukora kwesimbi ye cellulose ethers kunowedzerawo kuramba kupararira uye kufanana kwezvinhu zvakasanganiswa zvitsva, zvichidzivirira kupatsanurwa kwezvinhu, kuparadzaniswa uye kubuda ropa. Kukora kwesimbi ye cellulose ethers pazvinhu zvakagadzirwa nesimende kunobva mukukora kwesimbi ye cellulose ether. Pasi pemamiriro akafanana, kukora kwesimbi ye cellulose ether, kukora kwesimbi ye cement yakagadziriswa kunowedzera kunaka, asi kana kukora kwakanyanya, kunokanganisa kuyerera uye kushanda kwezvinhu (senge sticky trowel ne batch scraper). Zvinonetsa). Kukora kwesimbi yega yega uye kongiri inozvibatanidza inoda kukora kwakanyanya inoda kukora kwe cellulose ether. Pamusoro pezvo, kukora kwesimbi ye cellulose ether kuchawedzera kudiwa kwemvura kwezvinhu zvakagadzirwa nesimende uye kuwedzera goho resimbi. Mhinduro yemvura ine viscosity yakakura ye cellulose ether ine thixotropy yakakwira, inovawo hunhu hukuru hwe cellulose ether. Mhinduro dzemvura dze cellulose dzinowanzova ne pseudoplastic, non-thixotropic flow properties pasi pe tembiricha yavo ye gel, asi Newtonian flow properties pa low shear rates. Pseudoplasticity inowedzera nekuwedzera kwehuremu hwemamorekuru kana concentration ye cellulose ether. Structural gels inoumbwa kana tembiricha yawedzera, uye high thixotropic flow inoitika. Cellulose ethers ine concentrations yakakwira uye low viscosity inoratidza thixotropy kunyangwe pasi pe tembiricha ye gel. Iyi property inobatsira zvikuru pakuvaka building mortar kuti igadzirise leveling yayo uye sag. Zvinofanira kucherechedzwa pano kuti viscosity yakakwira ye cellulose ether, kuchengetedza mvura kuri nani, asi viscosity yakakwira, relative molecular weight ye cellulose ether yakakwira, uye kuderera kwakafanana kwekunyungudika kwayo, izvo zvine mhedzisiro yakaipa pakuwanda kwemortar uye kushanda kwayo.
Chikonzero: Cellulose ether ine simba rinooneka rekuisa mhepo pazvinhu zvitsva zvakagadzirwa nesimende. Cellulose ether ine boka rinofema (hydroxyl group, ether group) uye boka rinofema mvura (methyl group, glucose ring), i surfactant, ine basa repamusoro, uye nekudaro ine simba rekuisa mhepo. Simba rekuisa cellulose ether richagadzira "bhora", rinogona kuvandudza mashandiro echinhu chitsva chakasanganiswa, sekuwedzera plasticity uye kutsetseka kwemortar panguva yekushanda, izvo zvinobatsira pakugadzira mortar; zvichawedzerawo kubuda kwemortar., zvichideredza mutengo wekugadzira mortar; asi zvichawedzera porosity yezvinhu zvakaoma uye zvinoderedza hunhu hwazvo hwemakanika senge simba uye elastic modulus. Se surfactant, cellulose ether inewo simba rekuisa mvura kana mafuta pazvidimbu zvesimende, izvo pamwe chete ne simba rayo rekuisa mhepo rinowedzera kuyerera kwezvinhu zvakagadzirwa nesimende, asi simba rayo rekuomesa richaderedza kuyerera. Simba rekufamba kwemvura musanganiswa we plasticizing uye thickening effects. Kana huwandu hwe cellulose ether hwakaderera zvikuru, hunonyanya kuoneka senzira yekuisa purasitiki kana kuderedza mvura; kana huwandu hwacho hwakakwira, simba rekukora re cellulose ether rinowedzera nekukurumidza, uye simba rayo rekupinda mumhepo rinowanzo zara, saka mashandiro aro anowedzerwa. Simba rekukora kana kuti kudiwa kwemvura kwakawedzera.
Kunonoka kwekuisa: Cellulose ether inogona kunonotsa maitiro emvura esimende. Cellulose ethers inopa mortar zvinhu zvakasiyana-siyana zvinobatsira, uye inoderedzawo kuburitswa kwemvura nesimende nekukurumidza uye inononotsa maitiro emvura esimende. Izvi hazvina kunaka kushandiswa mortar munzvimbo dzinotonhora. Kunonoka uku kunokonzerwa nekunyudzwa kwemamorekuru e cellulose ether pazvigadzirwa zve hydration zvakaita seCSH ne ca(OH)2. Nekuda kwekuwedzera kwe viscosity ye pore solution, cellulose ether inoderedza kufamba kwemaions mu solution, nokudaro ichinonotsa maitiro e hydration. Kana huwandu hwe cellulose ether mu mineral gel material hwakakwira, mhedzisiro yekunonoka kwe hydration inonyanya kuoneka. Cellulose ethers haingodzoreri chete setting, asiwo inononotsa maitiro e cement mortar system. Mhedzisiro yekunonoka kwe cellulose ether haingotsamiri chete pahuwandu hwayo mu mineral gel system, asiwo pa chemical structure. Kana methylation yeHEMC yakakwira, mhedzisiro yekunonoka kwe cellulose ether inowedzera. Mhedzisiro yekunonoka kwe cellulose ether yakasimba. Zvisinei, viscosity ye cellulose ether haina simba guru pa hydration kinetics ye simende. Nekuwedzera kwe cellulose ether, nguva yekuisa dhaka inowedzera zvakanyanya. Pane hukama hwakanaka husina kurongeka pakati penguva yekutanga yekuisa dhaka nezviri mu cellulose ether, uye nguva yekupedzisira yekuisa ine hukama hwakanaka nezviri mu cellulose ether. Tinogona kudzora nguva yekushanda kwedhaka nekushandura zviri mu cellulose ether. Muchigadzirwa, chinoita basa rekuchengetedza mvura, kukora, kunonoka simba re hydration ye simende, uye kuvandudza mashandiro ekuvaka. Kugona kwakanaka kwekuchengetedza mvura kunoita kuti simende gypsum ash calcium iite zvakakwana, inowedzera zvakanyanya viscosity yakanyorova, inovandudza simba re bond redhaka, uye panguva imwe chete inogona kuvandudza simba rekukwesha uye kuchekwa kwedhaka, ichivandudza zvikuru mhedzisiro yekuvaka uye kushanda zvakanaka. Nguva inogadziriswa. Inovandudza kupfapfaidza kana kupomba kwedhaka, pamwe nesimba rekuvaka. Mukushandiswa chaiko, zvakakosha kuona mhando, viscosity, uye huwandu hwe cellulose zvichienderana nezvigadzirwa zvakasiyana, maitiro ekuvaka, uye nharaunda.
Nguva yekutumira: Mbudzi-15-2022