He aha nā waiwai o carboxymethyl cellulose?

He aha nā waiwai o carboxymethyl cellulose?

Pane:Carboxymethyl celluloseloaʻa nō hoʻi nā waiwai like ʻole ma muli o kona mau degere like ʻole o ka hoʻololi ʻana. ʻO ke degere o ka hoʻololi ʻana, ʻike ʻia hoʻi ʻo ke degere o ka etherification, ʻo ia ka helu awelika o H ma nā pūʻulu OH hydroxyl ʻekolu i pani ʻia e CH2COONa. Ke loaʻa i nā pūʻulu hydroxyl ʻekolu ma ke apo cellulose ka 0.4 H i ka hui hydroxyl i pani ʻia e ka carboxymethyl, hiki ke hoʻoheheʻe ʻia i ka wai. I kēia manawa, kapa ʻia ʻo 0.4 substitution degree a i ʻole medium substitution degree (substitution degree 0.4-1.2) .

Nā waiwai o carboxymethyl cellulose:

(1) He pauda keʻokeʻo (a i ʻole ka palaoa ʻala, fibrous), ʻono ʻole, ʻaʻohe pōʻino, hiki ke hoʻoheheʻe ʻia i loko o ka wai, a hana i kahi ʻano paʻa akaka, a ʻo ka hopena he kū ʻole a i ʻole ka alkaline iki. Loaʻa iā ia ka hoʻopuehu maikaʻi a me ka mana paʻa.

(2) Hiki ke hoʻohana ʻia kona ʻano wai e like me ka emulsifier o ka ʻano ʻaila / wai a me ka ʻano wai / ʻaila. Loaʻa iā ia ka mana emulsifying no ka ʻaila a me ka wax, a he emulsifier ikaika.

(3) Ke hālāwai ka hopena i nā paʻakai metala koʻikoʻi e like me ke kepau acetate, ferric chloride, silver nitrate, stannous chloride, a me ka potassium dichromate, hiki i ka ua. Eia naʻe, koe ka acetate kēpau, hiki ke hoʻoheheʻe hou ʻia i ka solution sodium hydroxide, a ua maʻalahi nā precipitates e like me ka barium, ka hao a me ka aluminika i ka 1% ammonium hydroxide solution.

(4) Ke hui ka hoʻonā ʻana i ka waika organic a me ka solution waika nonorganic, hiki i ka ua. Wahi a ka nānā ʻana, i ka wā i 2.5 ka pH waiwai, ua hoʻomaka ka turbidity a me ka ua. No laila hiki ke noʻonoʻo ʻia ka pH 2.5 ma ke ʻano koʻikoʻi.

(5) No nā paʻakai e like me ka calcium, magnesium a me ka paʻakai papaʻaina, ʻaʻohe ua e hiki mai, akā pono e hoʻemi ʻia ka viscosity, e like me ka hoʻohui ʻana i ka EDTA a i ʻole phosphate a me nā mea ʻē aʻe e pale ai.

(6) He hopena nui ka wela i ka viscosity o kāna ʻano wai. E emi ana ka viscosity i ka wā e piʻi ai ka mahana, a me ka hope. ʻAʻole hoʻololi ka paʻa o ka viscosity o ka hopena wai ma ka lumi lumi, akā hiki ke emi iki ka viscosity i ka wā i wela ai ma luna o 80 ° C no ka manawa lōʻihi. ʻO ka mea maʻamau, inā ʻaʻole i ʻoi aku ka mahana ma mua o 110 ° C, ʻoiai inā mālama ʻia ka mahana no 3 mau hola, a laila hoʻomaha ʻia i 25 ° C, e hoʻi mau ana ka viscosity i kona kūlana mua; akā, i ka wā e wela ai ka mahana i 120 ° C no 2 mau hola, ʻoiai ua hoʻihoʻi ʻia ka mahana, hāʻule ka viscosity e 18.9%. .

(7) E pili ana ka pH waiwai i ka viscosity o kona wai. ʻO ka mea maʻamau, ke haʻalele ka pH o kahi haʻina haʻahaʻa-viscosity mai ka neutral, ʻaʻole liʻiliʻi ka hopena o kona viscosity, ʻoiai no ka solution medium-viscosity, inā e haʻalele kona pH mai ka neutral, hoʻomaka ka viscosity e emi mālie; inā e haʻalele ka pH o ka mea hoʻonā kiʻekiʻe-viscosity mai ka neutral, e emi ana kona viscosity. He emi loa.

(8) Hoʻohālikelike me nā glues hiki ke hoʻoheheʻe ʻia i ka wai, nā mea palupalu a me nā resins. No ka laʻana, ua kūpono ia me ke kāpili holoholona, ​​ka gum arabic, ka glycerin a me ka starch soluble. Ua kūpono pū me ke aniani wai, ka waiʻona polyvinyl, ka resin urea-formaldehyde, ka resin melamine-formaldehyde, a me nā mea ʻē aʻe, akā i kahi pae liʻiliʻi.

(9) ʻO ke kiʻiʻoniʻoni i hana ʻia e ka hoʻomālamalama ʻana i ke kukui ultraviolet no 100 mau hola, ʻaʻohe ʻano ʻeleʻele a palupalu paha.

(10) ʻEkolu mau pae viscosity e koho mai e like me ka noi. No ka gypsum, e hoʻohana i ka viscosity waena (2% aqueous solution ma 300-600mPa·s), inā koho ʻoe i ka viscosity kiʻekiʻe (1% solution ma 2000mPa·s a i ʻole), hiki iā ʻoe ke hoʻohana iā ia i ka dosage pono e hoʻohaʻahaʻa pono ʻia.

(11) He mea hoʻopaneʻe kona wai i loko o ka gypsum.

(12) ʻAʻohe hopena ʻike o ka bacteria a me nā microorganism i kona ʻano pauka, akā he hopena ko lākou i kāna ʻano wai. Ma hope o ka hoʻohaumia ʻana, e hāʻule ka viscosity a ʻike ʻia ka mildew. ʻO ka hoʻohui ʻana i kahi nui kūpono o nā preservatives ma mua e hiki ke mālama i kona viscosity a pale i ka mildew no ka manawa lōʻihi. ʻO nā preservatives i loaʻa: BIT (1.2-benzisothiazolin-3-one), racebendazim, thiram, chlorothalonil, etc. ʻO ka helu hoʻohui kuhikuhi i loko o ka hopena wai he 0.05% a 0.1%.

Pehea ka maikaʻi o ka hydroxypropyl methylcellulose ma ke ʻano he mea mālama wai no ka mea hoʻopili anhydrite?

Pane: ʻO ka Hydroxypropyl methylcellulose kahi mea hoʻopaʻa wai kiʻekiʻe no nā mea gypsum cementitious. Me ka hoʻonui o ka ʻike o ka hydroxypropyl methylcellulose. Piʻi wikiwiki ka paʻa ʻana o ka wai o nā mea gypsum cemented. Ke hoʻohui ʻole ʻia kahi mea mālama wai, ʻo ka nui o ka mālama ʻana i ka wai o nā mea gypsum cemented ma kahi o 68%. Ke 0.15% ka nui o ka wai hoʻopaʻa wai, hiki i ka 90.5% ka paʻa ʻana o ka wai o nā mea gypsum cemented. A me nā koi mālama wai o ka plaster lalo. ʻOi aku ka nui o ka mea mālama wai ma mua o 0.2%, hoʻonui hou i ka nui, a piʻi mālie ka nui o ka mālama ʻana i ka wai o nā mea gypsum cementitious. Ka hoʻomākaukau ʻana i nā mea hoʻopalapala anhydrite. ʻO ke kumu kūpono o ka hydroxypropyl methylcellulose he 0.1% -0.15%.

He aha nā hopena like ʻole o ka cellulose like ʻole ma ka plaster of paris?

Pane: Hiki ke hoʻohana ʻia nā carboxymethyl cellulose a me ka methyl cellulose e like me nā mea mālama wai no ka plaster of paris, akā ʻoi aku ka haʻahaʻa o ka hopena mālama wai o ka carboxymethyl cellulose ma mua o ka methyl cellulose, a he paʻakai paʻakai ka carboxymethyl cellulose, no laila ua kūpono ia no ka Plaster of Paris he hopena hoʻemi a hoʻemi i ka ikaika o ka plaster.Methyl celluloseHe mea hoʻohui maikaʻi ia no nā mea gypsum cementitious e hoʻohui i ka paʻa ʻana o ka wai, ka mānoanoa, ka hoʻoikaika ʻana, a me ka viscosifying, koe wale nō ka hopena o kekahi mau ʻano i ka hopena i ka nui o ka dosage. kiʻekiʻe ma mua o ka carboxymethyl cellulose. No kēia kumu, ʻo ka hapa nui o ka gypsum composite gelling material e hoʻohana i ke ʻano o ka hoʻohui ʻana i ka carboxymethyl cellulose a me ka methyl cellulose, ʻaʻole i hoʻohana wale i kā lākou mau hiʻohiʻona ponoʻī (e like me ka hopena o ka carboxymethyl cellulose, ka hopena hoʻoikaika o ka methyl cellulose), a hoʻohana i kā lākou mau pono maʻamau (e like me ka paʻa ʻana o ka wai a me ka hopena mānoanoa). Ma kēia ala, hiki ke hoʻomaikaʻi ʻia ka hana paʻa wai o nā mea gypsum cementitious a me ka hana holoʻokoʻa o nā mea gypsum cementitious, ʻoiai e mālama ʻia ka piʻi ʻana o ke kumukūʻai ma kahi haʻahaʻa.