Mudhaka rakaoma, cellulose ether chinhu chikuru chinogona kuvandudza mashandiro edhaka rakanyorova uye kukanganisa mashandiro edhaka. Methyl cellulose ether inoita basa rekuchengetedza mvura, kukora, uye kuvandudza mashandiro ekuvaka. Kushanda zvakanaka kwekuchengetedza mvura kunoita kuti dhaka risakonzere kupwanywa, kupiswa nehupfu uye kudzikiswa kwesimba nekuda kwekushomeka kwemvura uye hydration isina kukwana yesimende; kukora Simba rechimiro chedhaka rakanyorova rinowedzera zvakanyanya, uye kuwedzerwa kwemethyl cellulose ether kunogona kuvandudza zvakanyanya viscosity yedhaka rakanyorova, uye kune kunamira kwakanaka kune substrates dzakasiyana, nokudaro zvichivandudza mashandiro edhaka rakanyorova pamadziro uye kuderedza marara; pamusoro pezvo, zvakasiyana Basa recellulose muzvigadzirwa rakasiyanawo, semuenzaniso: cellulose muma tile adhesives inogona kuwedzera nguva yekuvhura uye kugadzirisa nguva; cellulose mudhaka rekupfapfaidza remakanika inogona kuvandudza simba rechimiro chedhaka rakanyorova; mukuzvienzanisa, cellulose inoita basa mukudzivirira kugara, Kupatsanurwa uye kupatsanurwa.
Kugadzirwa kwe cellulose ether kunonyanya kugadzirwa nefibers dzechisikigo kuburikidza nekunyungudika kwealkali, grafting reaction (etherification), kuwacha, kuomesa, kukuya nedzimwe nzira. Zvinhu zvikuru zvefibers zvechisikigo zvinogona kukamurwa kuita: cotton fiber, cedar fiber, beech fiber, nezvimwewo. Dhigirii ravo repolymerization rakasiyana, izvo zvinokanganisa viscosity yekupedzisira yezvigadzirwa zvavo. Parizvino, vagadziri vakuru ve cellulose vanoshandisa cotton fiber (imwe inobva mu nitrocellulose) sechinhu chikuru chekugadzira. Cellulose ethers dzinogona kukamurwa kuita ionic uye non-ionic. Mhando ye ionic inonyanya kusanganisira carboxymethyl cellulose salt, uye non-ionic mhando inonyanya kusanganisira methyl cellulose, methyl hydroxyethyl (propyl) cellulose, uye hydroxyethyl cellulose. Su nezvimwewo. Mu dry powder mortar, nekuti ionic cellulose (carboxymethyl cellulose salt) haina kugadzikana kana paine calcium ions, haiwanzo shandiswa muzvigadzirwa zve dry powder zvakaita se cement slaked lime se cementitious materials.
Kuchengetwa kwemvura kwecellulose kune chekuitawo nekupisa kunoshandiswa. Kuchengetwa kwemvura kwemethyl cellulose ether kunoderera nekuwedzera kwekupisa. Semuenzaniso, muzhizha, kana paine chiedza chezuva, putty yekunze inonamirwa, izvo zvinowanzo kurumidzisa kugayiwa kwesimende nedhaka. Kuomarara uye kudzikira kwehuwandu hwekuchengetedza mvura zvinotungamira kune kunzwa kuri pachena kuti mashandiro ekuvaka uye mashandiro ekudzivirira kutsemuka zvinokanganiswa. Muchiitiko ichi, zvakakosha zvikuru kuderedza simba rezvinhu zvinopisa. Dzimwe nguva hazvigone kuzadzisa zvinodiwa zvekushandisa. Mamwe marapirwo anoitwa pacellulose, akadai sekuwedzera mwero we etherification, nezvimwewo, kuitira kuti mhedzisiro yekuchengetedza mvura irambe ichikwanisa kuramba ichishanda zvakanaka pakupisa kwakanyanya.
Kuchengetwa kweselulosi nemvura: Zvinhu zvikuru zvinokanganisa kuchengetwa kweselulosi mumvura zvinosanganisira huwandu hweselulosi inowedzerwa, viscosity yeselulosi, kupfava kweselulosi, uye tembiricha yenzvimbo yekushanda.
Kusimba kwe cellulose: Kazhinji, kusimba kwemvura kunowedzera, asi kusimba kwe cellulose kunowedzera, uye kuderera kwekunyungudika kwayo, izvo zvine mhedzisiro yakaipa pakushanda kwekuvaka nesimba re dhaka. Kusimba kwedhaka kwakakwira, kusimba kwedhaka kwacho kuri pachena, asi hazvina kuenzana zvakananga. Kusimba kwedhaka kwakakwira, kusimba kwedhaka rakanyorova kunowedzera. Panguva yekuvaka, rinonamira pa scraper uye rinonamatira zvakanyanya ku substrate, asi hazvizobatsiri zvakanyanya kuwedzera simba rekuvaka dhaka rakanyorova, uye kushanda kwe anti-sag hakuzove pachena panguva yekuvaka.
Kupfava kwe cellulose: Kupfava uku kunokanganisa kunyungudika kwe cellulose ether. Coarse cellulose inowanzova granular uye inopararira nyore nyore mumvura isina agglomeration, asi mwero wekunyungudika unononoka zvikuru. Haikodzeri kushandiswa mu dry powder mortar. Inogadzirwa mumba. Imwe cellulose inoputika, haisi nyore kupararira nekunyungudika mumvura, uye iri nyore kuungana. Upfu hwakakwana chete ndihwo hunogona kudzivirira methyl cellulose ether agglomeration paunowedzera mvura nekukurunga. Asi cellulose ether yakakora haingoparadzi chete asiwo inoderedza simba remudhaka. Kana dry powder mortar yakadaro yakavakwa munzvimbo yakakura, kumhanya kwemudhaka we ...
Nguva yekutumira: Kukadzi-13-2023