ʻO ka sodium Carboxymethyl cellulose nā waiwai a me nā mea hoʻohālikelike i ka CMC Viscosity

ʻO Sodium Carboxymethyl cellulose (CMC) he polymer maʻamau i hoʻohana ʻia i nā noi ʻoihana like ʻole, me ka meaʻai, nā lāʻau lapaʻau, nā huahana mālama pilikino, a me nā mea holoi. He mea hoʻoheheʻe wai ia o ka cellulose i hana ʻia e ka hopena o ka cellulose me ka chloroacetic acid a me ka sodium hydroxide. He nui loa ka CMC a he nui kona mau waiwai i kūpono ia no nā noi like ʻole. Ma kēia ʻatikala, e kūkākūkā mākou i nā waiwai o CMC a me nā mea e hoʻopili ai i kona viscosity.

Nā waiwai o CMC:

1. Solubility: Hiki ke hoʻoheheʻe ʻia ka CMC i ka wai, kahi e maʻalahi ai ke lawelawe a hoʻohana i nā noi like ʻole. Hiki iā ia ke hoʻoheheʻe i loko o kekahi mau mea hoʻoheheʻe kūlohelohe, e like me ka ethanol a me ka glycerol, ma muli o kona degere o ka hoʻololi ʻana.
2. Viscosity: ʻO CMC kahi polymer viscous loa e hiki ke hana i nā gels i nā kiʻekiʻe kiʻekiʻe. Hoʻopili ʻia ka viscosity o CMC e nā kumu like ʻole, e like me ke degere o ka hoʻololi ʻana, ka ʻike, ka pH, ka mahana, a me ka ʻike electrolyte.
3. Rheology: Hōʻike ka CMC i ke ʻano pseudoplastic, ʻo ia hoʻi, e emi ana kona viscosity me ka piʻi ʻana o ka shear rate. Pono kēia waiwai i nā noi kahi e pono ai ka viscosity kiʻekiʻe i ka wā o ka hana, akā pono ka viscosity haʻahaʻa i ka wā o ka noi.
4. Paʻa: Paʻa ka CMC ma luna o kahi ākea o ka pH a me nā kūlana wela. He kūpaʻa nō hoʻi ia i ka microbial degradation, kahi kūpono no ka hoʻohana ʻana i ka meaʻai a me nā noi lāʻau.
5. Nā waiwai hana kiʻiʻoniʻoni: Hiki iā CMC ke hana i nā kiʻiʻoniʻoni lahilahi a hiki ke hoʻomaloʻo. Loaʻa i kēia mau kiʻiʻoniʻoni nā waiwai pale maikaʻi a hiki ke hoʻohana ʻia e like me nā uhi no nā noi like ʻole.

Nā mea e hoʻopili ai i ka viscosity CMC:

1. Degree of substitution (DS): ʻO ke degere o ka hoʻololi ʻana, ʻo ia ka helu awelika o nā pūʻulu carboxymethyl i kēlā me kēia ʻāpana anhydroglucose i loko o ka mole cellulose. ʻO CMC me kahi DS kiʻekiʻe he kiʻekiʻe o ka hoʻololi ʻana, kahi e alakaʻi ai i ka viscosity kiʻekiʻe. ʻO kēia ke kumu o ka DS kiʻekiʻe e alakaʻi i nā hui carboxymethyl hou aʻe, kahi e hoʻonui ai i ka nui o nā mole wai i hoʻopaʻa ʻia i ka polymer.
2. Hoʻopili: Piʻi ka viscosity o CMC me ka hoʻonui ʻana i ka ʻike. ʻO kēia no ka mea ma nā kiʻekiʻe kiʻekiʻe, ʻoi aku ka nui o nā kaulahao polymer, kahi e alakaʻi ai i kahi kiʻekiʻe o ka entanglement a hoʻonui i ka viscosity.
3. pH: Hoʻopili ʻia ka viscosity o CMC e ka pH o ka hopena. Ma ka pH haʻahaʻa, ʻoi aku ka viscosity kiʻekiʻe o ka CMC no ka mea aia nā pūʻulu carboxyl i ko lākou ʻano protonated a hiki ke hoʻopili ikaika me nā molekole wai. Ma ka pH kiʻekiʻe, he haʻahaʻa ko CMC no ka mea aia nā pūʻulu carboxyl i ko lākou ʻano deprotonated a liʻiliʻi ka launa pū ʻana me nā molekole wai.
4. Mahana: E emi ana ka viscosity o CMC me ka piʻi ʻana o ka mahana. ʻO kēia no ka mea ma nā mahana kiʻekiʻe, ʻoi aku ka nui o ka ikehu wela o nā kaulahao polymer, e alakaʻi ana i kahi kiʻekiʻe o ka neʻe ʻana a me ka emi ʻana o ka viscosity.
5. Electrolyte concentration: Hoʻopili ʻia ka viscosity o CMC e ka hiki ʻana o nā electrolytes i ka hopena. Ma nā kiʻekiʻe electrolyte, emi ka viscosity o CMC no ka mea hiki i nā ion i loko o ka hopena ke launa pū me nā hui carboxyl o ka polymer a hoʻemi i kā lākou pilina me nā mole wai.

I ka hopena, ʻo Sodium Carboxymethyl cellulose (CMC) he polymer versatile loa e hōʻike ana i kahi ākea o nā waiwai, me ka solubility, viscosity, rheology, stability, a me nā waiwai hana kiʻiʻoniʻoni. Hoʻopili ʻia ka viscosity o CMC e nā kumu like ʻole, e like me ke degere o ka hoʻololi ʻana, ka ʻike, ka pH, ka mahana, a me ka ʻike electrolyte. He mea nui ka hoʻomaopopo ʻana i kēia mau mea no ka hoʻokō ʻana i ka hana o CMC i nā noi like ʻole.