He aha ka ʻokoʻa ma waena o ka hana o ka methyl cellulose ether a me ka lignin fiber

He aha ka ʻokoʻa ma waena o ka hana o ka methyl cellulose ether a me ka lignin fiber

Pane: Hōʻike ʻia ka hoʻohālikelike hana ma waena o ka methyl cellulose ether a me ka fiber lignin ma ka pākaukau

 Hoʻohālikelike hana ma waena o ka methyl cellulose ether a me ka fiber lignin

He aha ka mea e hoʻolohe ai i ka wā e hoʻohana ai i ka methyl cellulose a me ka carboxymethyl cellulose?

Pane: (1) I ka hoʻohana ʻana i ka wai wela e hoʻoheheʻe i ka cellulose, pono e hoʻomaʻalili piha ma mua o ka hoʻohana ʻana. ʻO ka mahana e pono ai no ka hoʻoheheʻe piha ʻana a me ke aniani kūpono e pili ana i ke ʻano o ka cellulose.

(2) Pono ka mahana no ka loaʻa ʻana o ka viscosity lawa

Carboxymethylcellulose≤25 ℃, methylcellulose≤20 ℃

(3) E kānana mālie i ka cellulose i loko o ka wai, a hoʻoulu a hiki i ka pau ʻana o nā ʻāpana, a laila e hoʻoulu a hiki i ka ʻike a maopopo loa ka hopena cellulose. Mai ninini pololei i ka wai i loko o ka cellulose, a mai hoʻohui pololei i ka nui o ka cellulose i hoʻoheheʻe ʻia a hana ʻia i mau puʻupuʻu a i ʻole pōpō i loko o ka ipu.

(4) Ma mua o ka hoʻomaʻemaʻe ʻia ʻana o ka pauka cellulose me ka wai, mai hoʻohui i nā mea alkaline i ka hui ʻana, akā ma hope o ka hoʻopuehu ʻana a me ka hoʻoulu ʻana, hiki ke hoʻohui ʻia kahi mea liʻiliʻi o ka alkaline aqueous solution (pH8 ~ 10) e hoʻolōʻihi i ka hemo. ʻO nā mea hiki ke hoʻohana ʻia ʻo ia ka: sodium hydroxide aqueous solution, sodium carbonate aqueous solution, sodium bicarbonate aqueous solution, wai lime, wai amonia a me ka amonia organik, etc.

(5) ʻOi aku ka maikaʻi o ka dispersibility o ka cellulose ether i mālama ʻia i ka ʻili i ka wai anuanu. Inā hoʻohui pololei ʻia i ka hopena alkaline, e hāʻule ka mālama ʻana i ka ʻili a hoʻoulu i ka condensation, no laila pono e mālama ʻia.

He aha nā waiwai o ka methylcellulose?

Pane: (1) Ke hoʻomehana ʻia ma luna o 200°C, hehee a palaha. ʻO ka lehu ma kahi o 0.5% ke puhi ʻia, a ʻaʻohe mea i ka wā e hana ʻia ai i slurry me ka wai. No kona viscosity, pili ia i ka degere o ka polymerization.

(2) Hoʻohālikelike ka hoʻoheheʻe ʻana i ka wai i ka mahana, ʻoi aku ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa.

(3) Hiki ke hoʻoheheʻe ʻia i ka hui ʻana o ka wai a me nā mea hoʻoheheʻe organik, e like me ka methanol, ethanol, ethylene glycol, glycerin a me acetone.

(4) Ke loaʻa nā paʻakai metala a i ʻole nā ​​​​electrolytes organik i loko o kāna ʻano wai, hiki ke kūpaʻa ka hopena. Ke hoʻohui ʻia ka electrolyte i ka nui, e kū mai ka gel a i ʻole ka ua.

(5) Loaʻa ka hana ma luna. Ma muli o ka loaʻa ʻana o nā pūʻulu hydrophilic a me ka hydrophobic i loko o kāna mau mole, aia nā hana o ka emulsification, colloid pale a me ka pae paʻa.

(6) ʻO ka gelling wela. Ke piʻi ka wai wai i kahi wela (ma luna o ka wela gel), e lilo ia i ʻūlū a hiki i ka gels a i ʻole ka hoʻoheheʻe ʻana, e lilo ai ka hopena i ka viscosity, akā hiki ke hoʻi i ke kūlana kumu ma hope o ka hoʻolili ʻana. ʻO ka mahana i loaʻa ai ka gelation a me ka ua ma muli o ke ʻano o ka huahana, ke ʻano o ka hopena, a me ka wikiwiki o ka hoʻomehana.

(7) Paʻa ka pH. ʻAʻole hiki ke maʻalahi ka viscosity o ka hoʻonā wai e ka waikawa a me ka alkali. Ma hope o ka hoʻohui ʻana i ka nui o ka alkali, me ka nānā ʻole i ke kiʻekiʻe o ka wela a i ʻole ka haʻahaʻa haʻahaʻa, ʻaʻole ia e hoʻoheheʻe ʻia a i ʻole ke kaulahao.

(8) Ma hope o ka maloʻo ʻana o ka hopena ma luna o ka ʻili, hiki iā ia ke hana i kahi kiʻi ʻoniʻoni ʻoniʻoni, paʻakikī a elastic, i kū i nā solvents organik, nā momona a me nā ʻaila like ʻole. ʻAʻole ʻeleʻele a ʻulaʻula paha ke ʻike ʻia i ka mālamalama, a hiki ke hoʻoheheʻe hou ʻia i ka wai. Inā hoʻohui ʻia ka formaldehyde i ka hopena a i ʻole ka mālama ʻia ʻana me ka formaldehyde, ʻaʻole hiki ke hoʻoheheʻe ʻia ke kiʻiʻoniʻoni i ka wai, akā hiki ke hoʻonui ʻia.

(9) Mānoanoa. Hiki iā ia ke mānoanoa i ka wai a me nā ʻōnaehana wai ʻole, a he hana anti-sag maikaʻi.

(10) ʻAiʻi. Loaʻa i kāna ʻano wai ka cohesiveness ikaika, hiki ke hoʻomaikaʻi i ka cohesiveness o ka sima, gypsum, pena, pigment, wallpaper, etc.

(11) Hoʻomaha. Hiki ke hoʻohana ʻia e hoʻomalu i ka coagulation a me ka ua o nā ʻāpana paʻa.

(12) Mālama i ka colloid a hoʻomaikaʻi i ka paʻa o ka colloid. Hiki iā ia ke pale i ka hōʻiliʻili a me ka coagulation o nā droplets a me nā puaʻa, a pale pono i ka ua.

(13) paʻa wai. He kiʻekiʻe ka viscosity o ka hoʻonā wai. Ke hoʻohui ʻia i ka mortar, hiki iā ia ke mālama i kahi ʻano wai kiʻekiʻe, kahi e pale pono ai i ka nui o ka absorption o ka wai e ka substrate (e like me nā brick, concrete, etc.) a hoʻemi i ka helu evaporation o ka wai.

(14) E like me nā hoʻonā colloidal ʻē aʻe, hoʻopaʻa ʻia e nā tannins, protein precipitants, silicates, carbonates, etc.

(15) Hiki ke hoʻohui ʻia me ka carboxymethyl cellulose i kēlā me kēia ʻāpana e loaʻa ai nā hopena kūikawā.

(16) Maikaʻi ka hana mālama ʻana o ka hopena. Inā hiki ke mālama maʻemaʻe i ka wā o ka hoʻomākaukau ʻana a me ka mālama ʻana, hiki ke mālama ʻia no kekahi mau pule me ka ʻole o ka palaho.

NĀ MEA: ʻAʻole ʻo Methylcellulose kahi mea ulu no nā microorganisms, akā inā e hoʻohaumia ʻia me nā microorganism, ʻaʻole ia e pale iā lākou mai ka hoʻonui ʻana. a e emi ana ka viscosity i keia manawa. Hiki iā ia ke hoʻokaʻawale i nā mea oxidizing, ʻoi aku hoʻi i nā hopena alkaline.

He aha ka hopena nui o ka carboxymethyl cellulose (CMC) ma ka gypsum?

Pane: ʻO Carboxymethyl cellulose (CMC) ka mea nui o ka mānoanoa a me ka hoʻopili ʻana, a ʻaʻole maopopo ka hopena paʻa wai. Inā hoʻohana pū ʻia me ka mea mālama wai, hiki iā ia ke mānoanoa a mānoanoa i ka gypsum slurry a hoʻomaikaʻi i ka hana hana, akā carboxymethyl cellulose E hoʻopaneʻe ka cellulose kumu i ka hoʻonohonoho ʻana o ka gypsum, a ʻaʻole hoʻi e paʻa, a e hāʻule nui ka ikaika. , no laila, pono e mālama pono ʻia ka nui o ka hoʻohana ʻana.