Chii chinonzi carboxymethyl cellulose?

Chii chinonzi carboxymethyl cellulose?

Mhinduro:Carboxymethyl celluloseinewo zvimiro zvakasiyana nekuda kwemadhigirii ayo akasiyana ekutsiva. Dhigirii rekutsiva, rinozivikanwawo sedhigirii reetherification, zvinoreva avhareji nhamba yeH mumapoka matatu eOH hydroxyl anotsiviwa neCH2COONA. Kana mapoka matatu ehydroxyl ari pacellulose-based ring ane 0.4 H muboka rehydroxyl rakatsiviwa necarboxymethyl, inogona kunyungudika mumvura. Panguva ino, inonzi 0.4 substitution dhigirii kana yepakati substitution degree (inotsiva dhigirii 0.4-1.2).

Zvinhu zve carboxymethyl cellulose:

(1) Ihupfu chena (kana zviyo zvakakora, fibrous), isinganakidze, isingakuvadzi, inonyungudika nyore mumvura, uye inoumba chimiro chakajeka chinonamira, uye mhinduro yacho haina kwayakarerekera kana kuti alkaline zvishoma. Iine kupararira kwakanaka uye simba rinosunga.

(2) Mushonga waro wemvura unogona kushandiswa se emulsifier yemhando yemafuta / mvura uye mvura / mafuta rudzi. Iyo zvakare ine emulsifying kugona kwemafuta uye wakisi, uye ine simba emulsifier.

3 Zvisinei, kunze kwelead acetate, inogona kuramba yakanyungudutswa musodium hydroxide solution, uye mvura inonaya yakaita sebarium, iron nealuminium inonyungudika zviri nyore mu1% ammonium hydroxide solution.

(4) Kana mhinduro ikasangana neorganic acid uye inorganic acid mhinduro, kunaya kunogona kuitika. Zvinoenderana nekutarisa, kana iyo pH kukosha iri 2.5, turbidity uye kunaya kwatanga. Naizvozvo pH 2.5 inogona kutariswa seyakakosha poindi.

(5) Kune munyu wakadai secalcium, magnesium uye tafura munyu, hapana kunaya kuchaitika, asi viscosity inofanira kuderedzwa, sekuwedzera EDTA kana phosphate nezvimwe zvinhu kuti zvidzivirire.

(6) Tembiricha ine simba guru pane viscosity yemushonga wayo une aqueous. Iyo viscosity inoderera zvinoenderana kana tembiricha ichikwira, uye zvinopesana. Kugadzikana kweiyo viscosity yeaqueous solution pamhepo yekupisa inoramba isingachinji, asi viscosity inogona kuderera zvishoma nezvishoma kana ichipisa pamusoro pe80 ° C kwenguva yakareba. Kazhinji, kana kutonhora kusingapfuuri 110 ° C, kunyange kana kutonhora kuchichengetwa kwemaawa matatu, uye kunotonhora kusvika ku25 ° C, viscosity ichiri kudzokera kune yayo yepakutanga; asi kana kutonhora kuchipisa kusvika ku120 ° C kwemaawa maviri, kunyange zvazvo kutonhora kuchidzorerwa, viscosity inodonha ne18.9%. .

(7) Iyo pH kukosha ichavawo neimwe pesvedzero pane viscosity yeaqueous solution. Kazhinji, kana pH yemushonga wepasi-viscosity ichitsauka kubva kune kwayakarerekera, viscosity yayo haina mhedzisiro, nepo yepakati-viscosity mhinduro, kana pH yayo ikatsauka kubva kune kwayakarerekera, viscosity inotanga kuderera zvishoma nezvishoma; kana iyo pH ye-high-viscosity solution ikatsauka kubva kune kwayakarerekera, viscosity yayo inoderera. Kuderera kwakanyanya.

(8) Inopindirana nemamwe maglue anonyungudika nemvura, zvinopfavisa uye resin. Semuenzaniso, inowirirana nemhuka glue, gum arabic, glycerin uye soluble starch. Inopindirana zvakare negirazi remvura, polyvinyl doro, urea-formaldehyde resin, melamine-formaldehyde resin, nezvimwewo, asi kusvika padiki.

(9) Firimu rakagadzirwa neradiation ultraviolet chiedza kwemaawa 100 harisati rachinja ruvara kana brittleness.

(10) Kune matatu viscosity siyana kusarudza kubva maererano nekushandisa. Kune gypsum, shandisa medium viscosity (2% aqueous solution pa 300-600mPa · s), kana ukasarudza high viscosity (1% mhinduro pa 2000mPa · s kana kupfuura), unogona kuishandisa muyero inofanira kuderedzwa zvakakodzera.

(11) Mushonga wayo wemvura unoshanda senge retarder mugypsum.

(12) Utachiona uye tupukanana hahuna mhedzisiro iri pachena pachimiro chayo cheupfu, asi zvine mhedzisiro pamushonga wayo une aqueous. Mushure mekusvibiswa, viscosity ichadonha uye mildew ichaonekwa. Kuwedzera huwandu hwakakodzera hwekuchengetedza pachine nguva kunogona kuchengetedza viscosity yayo uye kudzivirira mildew kwenguva yakareba. Available preservatives ndeiyi: BIT (1.2-benzisothiazolin-3-one), racebendazim, thiram, chlorothalonil, etc. The referensi kuwedzera uwandu mu aqueous mhinduro iri 0.05% kusvika 0.1%.

Inoshanda sei hydroxypropyl methylcellulose sechinhu chinochengeta mvura yeanhydrite binder?

Mhinduro: Hydroxypropyl methylcellulose ndeyepamusoro-inoshanda-yekuchengetedza mvura mumiririri wegypsum cementitious zvinhu. Nekuwedzera kwezvinyorwa zve hydroxypropyl methylcellulose. Kuchengetwa kwemvura kwegypsum cemented material kunowedzera nokukurumidza. Kana pasina mvura inochengetedza mumiriri inowedzerwa, mwero wekuchengetedza mvura wegypsum simende zvinhu zvinenge 68%. Kana huwandu hwemvura inochengetedza 0.15%, chiyero chekuchengetedza mvura yegypsum simende zvinhu zvinogona kusvika 90.5%. Uye izvo zvinodikanwa zvekuchengetedza mvura zvepasi plaster. Iyo dosage yemvura inochengetedza mumiriri inodarika 0.2%, inowedzera kuwedzera dosi, uye mwero wekuchengetedza mvura wegypsum cementitious material unowedzera zvishoma nezvishoma. Kugadzirira kweanhydrite plastering zvinhu. Muyero wakakodzera wehydroxypropyl methylcellulose ndeye 0.1% -0.15%.

Ndeapi akasiyana mhedzisiro ye cellulose yakasiyana pane plaster yeParis?

Mhinduro: Zvese zviri zviviri carboxymethyl cellulose uye methyl cellulose zvinogona kushandiswa semvura-inochengetedza midziyo yepurasita yeParis, asi iyo inochengetedza mvura yecarboxymethyl cellulose yakadzikira kupfuura iyo yemethyl cellulose, uye carboxymethyl cellulose ine sodium munyu, saka yakakodzera Plaster yeParis ine kudzora uye inoderedza simba repurasita.Methyl cellulosemusanganiswa wakanakira wegypsum cementitious zvinhu zvinosanganisa kuchengetedza kwemvura, kukora, kusimbisa, uye viscosifying, kunze kwekunge mamwe marudzi ane mhedzisiro yekudzosa kana dosi yakakura. yakakwirira kupfuura carboxymethyl cellulose. Nechikonzero ichi, akawanda gypsum composite gelling materials anotora nzira yekubatanidza carboxymethyl cellulose uye methyl cellulose, iyo isingangopi hunhu hwayo (sekudzoreredza mhedzisiro yecarboxymethyl cellulose, iyo inosimbisa mhedzisiro yemethyl cellulose), uye kushandisa zvayakanakira zvakajairika (sekuchengeta kwavo mvura uye kukora). Nenzira iyi, zvese kuchengetedza kwemvura kuita kwegypsum cementitious material uye kushanda kwakazara kwegypsum cementitious material kunogona kuvandudzwa, ukuwo kuwedzera kwemutengo kuchichengeterwa kwakadzikira.