Kuchengetwa kwemvura yehydroxypropyl methylcellulose

Hydroxypropyl methylcellulose (HPMC) isiri-ionic cellulose ether yakagadzirwa kubva kune yakasikwa polymer material cellulose kuburikidza nehurongwa hwemakemikari maitiro. Hydroxypropylmethylcellulose (HPMC) inonhuhwirira, isinganakidze, isina chepfu chena poda inogona kunyungudutswa mumvura inotonhora kuti iite yakajeka viscous mhinduro. Iine maitiro ekukora, kusunga, kuparadzira, emulsifying, firimu-kuumba, kumisa, adsorbing, gelling, pamusoro pekushanda, kuchengetedza unyoro nekudzivirira colloid. Mudhaka, basa rakakosha rehydroxypropyl methylcellulose kuchengetedza mvura, iko kugona kwedhaka kuchengetedza mvura.

1. Kukosha kwekuchengetedza mvura mudhaka

Doka rine mvura isina kuchengetwa iri nyore kubuda ropa uye kupatsanura panguva yekufambisa nekuchengetedza, kureva kuti, mvura inoyangarara pamusoro, jecha uye simende inonyura pazasi, uye inofanira kumutswa zvakare isati yashandiswa. Dhoka rine kusachengeteka kwemvura, mukuita kwekuzora, chero bedzi iyo yakagadzirira-yakasanganiswa dhaka inosangana nebhokisi kana chigadziko, iyo yakagadzirira-yakasanganiswa dhaka inotorwa nemvura, uye panguva imwe chete, iyo yekunze dhaka richapfavisa mvura mumhepo, zvichikonzera kurasikirwa kwemvura yedhaka. Mvura isina kukwana inokanganisa kuwedzera kwe hydration ye simenti uye inokanganisa kuvandudzwa kwesimba rematope, zvichiita kuti simba rakaderera, kunyanya simba rekubatanidza pakati pevhu rakaoma uye nheyo yepasi, zvichikonzera kuputika uye kudonha kubva mudhaka.

2. Nzira yechinyakare yekuvandudza kuchengetwa kwemvura kwedhaka

Mhinduro yechinyakare ndeyekudiridza hwaro, asi hazvibviri kuve nechokwadi kuti chigadziko chakanyoroveswa. Chinangwa chakanaka che hydration chesimende dhaka pachigadziko ndechekuti: simenti hydration chigadzirwa inopinda munheyo pamwe chete nekuita kwechigadziko chinotora mvura, ichigadzira "kiyi yekubatanidza" inoshanda nechigadziko, kuitira kuti uwane iyo inodiwa chisungo simba. Kudiridza zvakananga pamusoro pechigadziko kunokonzeresa kupararira kwakanyanya mumvura kunyura kwegasi nekuda kwekusiyana kwekushisa, nguva yekudiridza, uye kufanana kwekudiridza. Nheyo yacho ine mvura shoma uye icharamba ichitora mvura mudhaka. Pamberi pe simenti hydration ichienderera mberi, mvura inobatwa, iyo inokanganisa kupinda kwe simenti hydration uye hydration zvigadzirwa mumatrix; chigadziko chine mvura yakakura, uye mvura iri mudhaka inoyerera ichienda pasi. Iyo yepakati yekutama kumhanya inononoka, uye kunyange mvura-yakapfuma layer inoumbwa pakati pedhaka uye matrix, iyo inokanganisawo kusimba kwechisungo. Naizvozvo, kushandisa yakajairwa base yekudiridza nzira haizongokundikana kugadzirisa zvinobudirira dambudziko rekunyura kwemvura yakakwira yemadziro emadziro, asi kuchakanganisa kusimba kwekubatanidza pakati pedhaka nechigadziko, zvichikonzera kuputika nekutsemuka.

3. Kuchengetedza mvura kunoshanda

(1) Kuita kwakanakisa kwekuchengetedza mvura kunoita kuti dhaka rivhurike kwenguva yakareba, uye rine zvakanakira kuvaka-nzvimbo yakakura, hupenyu hurefu hwesevhisi mudhiramu, uye kusanganisa batch uye kushandisa batch.

(2) Kuita kwakanaka kwekuchengetedza mvura kunoita kuti simende mudhaka izere hydrated, zvinobudirira kuvandudza kushanda kwechisungo chedhaka.

(3) Doka rine yakanakisa kuchengetedza kwemvura kuita, izvo zvinoita kuti dhaka risanyanya kupatsanurwa uye kubuda ropa, izvo zvinovandudza kushanda uye kuvakwa kwedhaka.


Nguva yekutumira: Mar-20-2023