He aha nga ahuatanga o te carboxymethyl cellulose?

He aha nga ahuatanga o te carboxymethyl cellulose?

Whakautu:Carboxymethyl cellulosehe rereke ano nga ahuatanga na te rereke o nga nekehanga whakakapinga. Ko te tohu o te whakakapinga, e mohiotia ana ko te tohu o te etherification, te tikanga o te tau toharite o H i roto i nga roopu OH hydroxyl e toru kua whakakapihia e CH2COONa. Ina he 0.4 H i roto i te roopu hydroxyl e toru i runga i te mowhiti i runga i te cellulose, ka whakakapihia e te carboxymethyl, ka rewa ki te wai. I tenei wa, ka kiia ko te tohu whakakapinga 0.4, he tohu whakakapinga waenga ranei (tohu whakakapinga 0.4-1.2) .

Nga ahuatanga o te carboxymethyl cellulose:

(1) He paura ma (he witi maaka ranei, he kiko), he reka, he kino, he ngawari ki te wairewa i roto i te wai, ka hangai he ahua piri, he koretake, he paku kawakore te otinga. He pai te marara me te mana here.

(2) Ka taea te whakamahi i tana otinga wai hei whakaehunga o te momo hinu / wai me te momo wai / hinu. Kei a ia ano te kaha whakaehunga mo te hinu me te wax, a he kaha te whakaemi.

(3) Ina tutaki te otinga ki nga tai whakarewa taumaha penei i te acetate mata, te ferric chloride, te pakawa hiriwa, te stannous chloride, me te dichromate pāhare pāporo, ka puta te rerenga. Heoi, haunga mo te acetate mata, ka taea ano te rewa i roto i te wairewa konutai konutai, a, ko nga rerenga penei i te barium, te rino me te konumohe he ngawari te whakarewa ki te 1% te wairewa haukinia hydroxide.

(4) Ina tutaki te otinga ki te waikawa waro me te wairewa waikawa pararopi, ka puta te rerenga. E ai ki te tirohanga, i te 2.5 te uara pH, kua timata te koriri me te ua. No reira ka taea te whakaaro ki te pH 2.5 te waahi tino nui.

(5) Mo nga tote penei i te konupūmā, te konupora me te tote tepu, karekau he ua e puta, engari me whakaiti te viscosity, penei me te taapiri i te EDTA, te phosphate ranei me etahi atu matū hei aukati.

(6) He nui te awe o te pamahana ki te pokey o tana wairewa wai. He rite tonu te heke o te pokey ka piki ake te pāmahana, me te rereke. Ko te pumau o te pokey o te wairewa wai i te pāmahana rūma ka noho tonu, engari ka heke haere te pokey ina whakamahana ki runga ake i te 80°C mo te wa roa. Ko te tikanga, ki te kore e neke ake te pāmahana ki te 110°C, ahakoa ka mau tonu te mahana mo te 3 haora, ka whakamatao ki te 25°C, ka hoki tonu te pokey ki tona ahua taketake; engari ka whakawerahia te mahana ki te 120°C mo nga haora e 2, ahakoa ka hoki ano te pāmahana, ka heke te viscosity ma te 18.9%. .

(7) Ka whai awe ano te uara pH ki te poiketanga o tana wairewa wai. Ko te tikanga, ina kotiti ke te pH o te wairewa iti-pokey mai i te kupapa, he iti te paanga o tona pokey, engari mo te otinga reo-pokey, ki te rereke tona pH i te koretake, ka timata te heke haere o te pokey; ki te kotiti ke te pH o te otinga pokey teitei mai i te kūpapa, ka heke tona pokey. He tino heke.

(8) Hototahi ki etahi atu kapia wairewa, whakangawari me te kapia. Hei tauira, he hototahi ki te kāpia kararehe, kapia arabic, glycerin me te māngaro wairewa. He hototahi ano ki te karaihe wai, te waipiro polyvinyl, te urea-formaldehyde resin, te melamine-formaldehyde resin, me etahi atu, engari ki te iti ake.

(9) Ko te kiriata i mahia ma te whakamaarama i te rama ultraviolet mo te 100 haora karekau he tae, he pakarukaru ranei.

(10) E toru nga awhe pokey hei whiriwhiri mai i runga i te tono. Mo te gypsum, whakamahia te pokey reo (2% wairewa wai i te 300-600mPa·s), ki te whiriwhiri koe i te pokey teitei (1% otinga i te 2000mPa·s neke atu ranei), ka taea e koe te whakamahi i roto i te inenga me tika te whakaheke.

(11) Ko tana wairewa wai hei aukati i roto i te gypsum.

(12) Ko nga huakita me nga microorganisms karekau he awe ki runga i te ahua o te paura, engari ka whai paanga ki tana wairewa wai. I muri i te poke, ka heke te pokey ka puta te koriri. Ko te taapiri i te nui o nga rongoa i mua ka mau tonu tona pokey me te aukati i te koriri mo te wa roa. Ko nga rongoa e waatea ana: BIT (1.2-benzisothiazolin-3-one), racebendazim, thiram, chlorothalonil, me etahi atu.

He pehea te whai hua o te hydroxypropyl methylcellulose hei kaihoko pupuri wai mo te takai here waiu?

Whakautu: Ko te Hydroxypropyl methylcellulose he tino kaha ki te pupuri i te wai mo nga rauemi cimentitious gypsum. Na te piki o te ihirangi o te hydroxypropyl methylcellulose. Ko te pupuri i te wai o nga mea raima gypsum ka tere te piki. Ki te kore e taapirihia he kaihoko pupuri wai, ko te tere o te pupuri wai o nga mea gypsum cimented he 68%. A, no te te nui o te kaihoko pupuri wai ko 0.15%, te auau pupuri wai o gypsum rauemi cimented taea tae 90.5%. Me nga whakaritenga pupuri wai o te raima o raro. Ko te inenga o te kaihoko pupuri wai ka nui ake i te 0.2%, ka piki ake te inenga, ka piki haere te tere o te pupuri wai o nga mea gypsum cimentitious. Te whakarite i nga rauemi raima anhydrite. Ko te inenga pai o te hydroxypropyl methylcellulose he 0.1% -0.15%.

He aha nga rereketanga rereke o te cellulose ki te raima o Paris?

Whakautu: Ka taea te whakamahi i te carboxymethyl cellulose me te methyl cellulose hei taonga pupuri wai mo te raima o Paris, engari he iti ake te kaha o te pupuri wai o te carboxymethyl cellulose i tera o te methyl cellulose, me te carboxymethyl cellulose kei roto te tote konutai, no reira he pai mo te Plaster of Paris he painga whakaheke me te whakaiti i te kaha o te raima.Methyl cellulosehe whakaurunga pai mo nga rawa cimentitious gypsum e whakauru ana i te pupuri wai, te whakapakeke, te whakakaha, me te viscosifying, engari ko etahi o nga momo ka pa te paheketanga ina he nui te inenga. teitei ake i te carboxymethyl cellulose. Mo konei, ko te nuinga o nga rawa whakahiato gypsum gelling e mau ana i te tikanga o te whakahuihui carboxymethyl cellulose me te methyl cellulose, ehara i te mea ko o raatau ahuatanga anake (pērā i te aukati o te carboxymethyl cellulose, te whakakaha o te methyl cellulose), me te whakamahi i o raatau painga noa (penei i te pupuri i te wai me te whakapakeke). Ma tenei huarahi, ka taea te whakapai ake i nga mahi pupuri wai o nga mea raima gypsum me te mahi matawhānui o nga mea raima gypsum, i te mea ka mau te pikinga utu ki te waahi iti rawa.