Puhi:I mea e pani ai i ka slurry non-degradable polyvinyl alcohol (PVA), hemp stalk cellulose ether-hydroxypropyl methylcellulose i hoʻomākaukau ʻia mai nā ʻōpala hemp mahiʻai, a hui pū me ka starch kikoʻī e hoʻomākaukau ai i ka slurry.Polyester-pulu pulupulu huila T/C65/35 14.7 tex ka nui a ua ho'āʻo ʻia kāna hana nui.ʻO ke kaʻina hana maikaʻi loa o ka hydroxypropyl methylcellulose penei: ʻo ka hapa nui o ka lye he 35%;ʻo ka compression ratio o ka alkali cellulose he 2.4;ʻO ka lakio wai o ka methane a me ka propylene oxide he 7 : 3;e hoʻoheheʻe me ka isopropanol;ʻO ke kaomi ʻana he 2 .0MPa.ʻO ka nui i hoʻomākaukau ʻia e ka hui ʻana i ka hydroxypropyl methylcellulose a me ka starch kikoʻī he COD haʻahaʻa a ʻoi aku ka maikaʻi o ke kaiapuni, a hiki i nā mea hōʻailona nui ke hoʻololi i ka nui PVA.
Hua'ōlelo nui:lāʻau hemp;hemp stalk cellulose ether;ka waiʻona polyvinyl;ka nui o ka cellulose ether
0.Olelo mua
ʻO Kina kekahi o nā ʻāina me nā kumu waiwai mauʻu.ʻOi aku ka nui o ka hua ma mua o 700 miliona tons, a ʻo ka nui o ka hoʻohana ʻana i ka mauʻu he 3% wale nō i kēlā me kēia makahiki.ʻAʻole i hoʻohana ʻia ka nui o nā kumuwaiwai mauʻu.ʻO Straw kahi waiwai lignoscellulosic kūlohelohe maoli, hiki ke hoʻohana ʻia i ka meaʻai, mea hoʻomomona, cellulose derivatives a me nā huahana ʻē aʻe.
I kēia manawa, ua lilo ka hoʻohaumia ʻana i ka pollution wai i loko o ke kaʻina hana textile i kekahi o nā kumu haumia nui loa.He kiʻekiʻe loa ka koi oxygen kemika o PVA.Ma hope o ka hoʻokuʻu ʻia ʻana o ka wai ʻōpala i hana ʻia e PVA i ka paʻi ʻana a me ke kala ʻana i loko o ka muliwai, e kāohi a hoʻopau paha i ka hanu ʻana o nā mea ola wai.Eia kekahi, hoʻonui ka PVA i ka hoʻokuʻu ʻana a me ka neʻe ʻana o nā metala koʻikoʻi i nā sediment i loko o nā kino wai, e hoʻonui ai i nā pilikia kūlohelohe.No ka hoʻokō ʻana i ka noiʻi e pili ana i ka hoʻololi ʻana i ka PVA me ka slurry ʻōmaʻomaʻo, ʻaʻole pono e hoʻokō i nā koi o ke kaʻina sizing, akā e hōʻemi hoʻi i ka pollution o ka wai a me ka ea i ka wā o ke kaʻina hana.
Ma kēia haʻawina, ua hoʻomākaukau ʻia ka hemp stalk cellulose ether-hydroxypropyl methylcellulose (HPMC) mai nā ʻōpala hemp mahiʻai, a ua kūkākūkā ʻia kāna kaʻina hana.A hoʻohui i ka hydroxypropyl methylcellulose a me ka nui starch e like me ka nui no ka hoʻohālikelike ʻana me ka nui PVA, a kūkākūkā i kāna hana nui.
1. Hoao
1 .1 Nā mea hana a me nā mea hana
Hemp stalk, Heilongjiang;polyester-pulu pulupulu i hui pu ia T/C65/3514.7 tex;hemp stalk cellulose ether-hydroxypropyl methylcellulose i hana pono'ī;FS-101, starch hoʻololi ʻia, PVA-1799, PVA-0588, Liaoning Zhongze Group Chaoyang Textile Co., Ltd.;propanol, ka papa kiʻekiʻe;propylene oxide, glacial acetic acid, sodium hydroxide, isopropanol, analytically pure;methyl chloride, naikokene maʻemaʻe kiʻekiʻe.
GSH-3L ka ipu hao, JRA-6 kikohoʻe hōʻike manakia hoʻoulu wai ʻauʻau, DHG-9079A uwila hoʻoheheʻe wela mau maloʻo umu, IKARW-20 overhead mechanical agitator, ESS-1000 laʻana mīkini sizing, YG 061/PC uila hoʻokahi wili mika ikaika , LFY-109B mea ho'āʻo abrasion yarn lolouila.
1.2 Hoʻomākaukau i ka hydroxypropyl methylcellulose
1. 2. 1 Hoʻomākaukau ʻana i ka fiber alkali
E hoʻokaʻawale i ka ʻōpala hemp, e ʻoki i 20 meshes me kahi pulverizer, e hoʻohui i ka pauka hemp stalk i 35% NaOH wai wai, a e hoʻomoʻa iā ia ma ka lumi wela no 1 .5 ~ 2 .0 h.E kaomi i ka fiber alkali impregnated i hiki i ka lakio nui o ka alkali, cellulose, a me ka wai he 1. 2:1.2:1.
1. 2. 2 Etherification pane
E hoʻolei i ka cellulose alkali i hoʻomākaukau ʻia i loko o ka ipu hoʻoheheʻe, hoʻohui i 100 mL o ka isopropanol e like me ka diluent, e hoʻohui i ka wai 140 mL o ka methyl chloride a me 60 mL o propylene oxide, hoʻomāmā, a kaomi i ka 2 .0 MPa, e hoʻokiʻekiʻe mālie i ka mahana i 45°C no 1-2 mau hola, a e hana ma 75°C no 1-2 mau hola e hoʻomākaukau ai i ka hydroxypropyl methylcellulose.
1. 2. 3 Hana hope
E hoʻololi i ka pH o ka cellulose etera etherified me ka ʻakika acetic glacial i 6 .5 ~ 7 .5, holoi ʻia me ka propanol ʻekolu manawa, a maloʻo i ka umu ma 85 ° C.
1.3 Kaʻina hana o ka hydroxypropyl methylcellulose
1. 3. 1 Ka hopena o ka wikiwiki o ka rotational i ka hoʻomākaukau ʻana i ka cellulose ether
ʻO ka maʻamau ka hopena etherification he hopena heterogeneous mai loko a i loko.Ināʻaʻohe mana o waho, he mea paʻakikī ke komoʻana o ka etherification agent i ka crystallization o ka cellulose, no laila pono e hoʻohui piha i ka etherification agent me ka cellulose ma o ka hoʻouluʻana.I loko o kēia haʻawina, ua hoʻohana ʻia kahi reactor hoʻoulu ʻia kiʻekiʻe.Ma hope o nā hoʻokolohua hou a me nā hōʻike, ʻo ka wikiwiki rotational i koho ʻia ʻo 240-350 r / min.
1. 3. 2 Ka hopena o ka neʻe ʻana o ka alkali ma ka hoʻomākaukau ʻana i ka cellulose ether
Hiki i ka alkali ke hoʻopau i ka hale paʻa o ka cellulose i mea e pehu ai, a i ka wā e maʻa mau ai ka pehu o ka ʻāina amorphous a me ka ʻāina crystalline, hele mālie ka etherification.I ke kaʻina hana o ka cellulose ether, ʻo ka nui o ka alkali i hoʻohana ʻia i ke kaʻina hana alkalization cellulose he mana nui i ka pono etherification o nā huahana etherification a me ke ʻano o ka hoʻololi ʻana o nā hui.I ka hoʻomākaukau ʻana o ka hydroxypropyl methylcellulose, e like me ka piʻi ʻana o ka lye, piʻi pū ka ʻike o nā hui methoxyl;ʻO ka mea ʻē aʻe, i ka emi ʻana o ka lye, ʻoi aku ka nui o ka hydroxypropyl methylcellulose.ʻO ka maʻiʻo o ka pūʻulu methoxy e pili pono i ka ʻike o ka lye;ʻO ka maʻiʻo o ka hydroxypropyl ka like ʻole me ka ʻike o ka lye.Ua koho ʻia ka hapa nui o NaOH ma ke ʻano he 35% ma hope o nā hoʻāʻo hou ʻana.
1. 3. 3 ʻO ka hopena o ka lākiō kaomi cellulose alkali ma ka hoʻomākaukau ʻana i ka cellulose ether
ʻO ke kumu o ke kaomi ʻana i ka fiber alkali ka mālama ʻana i ka ʻike wai o ka cellulose alkali.I ka liʻiliʻi ʻana o ka ratio kaomi, hoʻonui ʻia ka ʻike wai, hoʻemi ka manaʻo o ka lye, emi ka helu etherification, a hydrolyzed ka mea etherification a hoʻonui ʻia nā hopena ʻaoʻao., ua emi loa ka etherification efficiency.I ka nui loa o ka lakene kaomi, emi ka wai, ʻaʻole hiki ke pehu ka cellulose, ʻaʻohe reactivity, a ʻaʻole hiki i ka etherification agent ke hoʻopili piha me ka cellulose alkali, a ʻaʻole kūlike ka hopena.Ma hope o nā hoʻokolohua he nui a me nā hoʻohālikelike hoʻohālikelike, ua hoʻoholo ʻia ʻo ka nui o ka nui o ka alkali, ka wai a me ka cellulose he 1. 2: 1.2:1.
1. 3. 4 Ka hopena o ka wela ma ka hoʻomākaukau ʻana i ka cellulose ether
Ma ke kaʻina hana o ka hydroxypropyl methylcellulose, e hoʻomalu mua i ka mahana ma 50-60 ° C a mālama i kahi mahana mau no 2 mau hola.Hiki ke hoʻokō ʻia ka hopena hydroxypropylation ma kahi o 30 ℃, a piʻi nui ka wikiwiki o ka hydroxypropylation ma 50 ℃;E hoʻokiʻekiʻe mālie i ka mahana i 75 ℃, a e hoʻomalu i ka mahana no 2 mau hola.Ma 50 ° C, ʻaʻole hiki ke hoʻololi i ka methylation, ma 60 ° C, ua lohi ka hopena, a ma 75 ° C, ua wikiwiki loa ka methylation reaction rate.
ʻO ka hoʻomākaukau ʻana i ka hydroxypropyl methylcellulose me ka hoʻokele wela o nā pae he nui ʻaʻole hiki ke hoʻomalu wale i ke koena o nā pūʻulu methoxyl a me hydroxypropyl, akā kōkua pū nō hoʻi i ka hōʻemi ʻana i nā hopena ʻaoʻao a me ka mālama ʻana, a loaʻa nā huahana me ke ʻano kūpono.
1. 3. 5 Ka hopena o ka lākiō o ka lākiō etherification agent ma ka hoʻomākaukau ʻana i ka cellulose ether
Ma muli o ka hydroxypropyl methylcellulose he etera hui ʻole ionic, ua hoʻololi ʻia nā pūʻulu methyl a me hydroxypropyl ma nā kaulahao macromolecular hydroxypropyl methylcellulose, ʻo ia hoʻi, ʻokoʻa C i kēlā me kēia kūlana apo glucose.Ma ka ʻaoʻao ʻē aʻe, ʻoi aku ka nui o ka hoʻopuehu ʻana a me ka randomness ka lakene mahele o ka methyl a me ka hydroxypropyl.Pili ka wai hoʻoheheʻe o HPMC i ka ʻike o ka hui methoxy.Ke haʻahaʻa ka ʻike o ka hui methoxy, hiki ke hoʻoheheʻe ʻia i ka alkali ikaika.Ke piʻi aʻe ka ʻike methoxyl, lilo ia i mea maʻalahi i ka pehu wai.ʻOi aku ka kiʻekiʻe o ka methoxy maʻiʻo, ʻoi aku ka maikaʻi o ka hoʻoheheʻe wai, a hiki ke hana ʻia i slurry.
ʻO ka nui o ka etherifying agent methyl chloride a me propylene oxide he hopena pololei i ka ʻike o ka methoxyl a me ka hydroxypropyl.No ka hoʻomākaukau ʻana i ka hydroxypropyl methylcellulose me ka hoʻoheheʻe wai maikaʻi, ua koho ʻia ka lakio wai o ka methyl chloride a me propylene oxide e like me 7:3.
1.3.6 ʻO ke kaʻina hana maikaʻi loa o ka hydroxypropyl methylcellulose
ʻO ka mea hana hoʻopiʻi he mea hoʻoulu kiʻekiʻe kiʻekiʻe;ʻo ka wikiwiki o ka hoʻololi ʻana he 240-350 r / min;ʻo ka hapa nui o ka lye he 35%;ʻo ka lākiō hoʻoemi o ka cellulose alkali he 2. 4;Hydroxypropoxylation ma 50 ° C no 2 mau hola, methoxylation ma 75 ° C no 2 mau hola;etherification agent methyl chloride a propylene oxide ka nui o ka wai lākiō 7:3;hoʻomāmā;kaomi 2 .0 MPa;ʻO ka diluent he isopropanol.
2. ʻIke a me ka noi
2.1 SEM o ka hemp cellulose a me ka alkali cellulose
Ke hoʻohālikelike nei i ka cellulose hemp untreated a me ka cellulose hemp i mālama ʻia me 35% NaOH, hiki ke ʻike maopopo ʻia he ʻoi aku ka nui o ka cellulose alkalized, ʻoi aku ka nui o ka ʻili, ʻoi aku ka nui o ka hana a me ka maʻalahi o ka etherification.
2.2 Ka Hoʻoholo ʻana i ka Spectroscopy Infrared
Lawe ʻia ka cellulose mai nā ʻōpala hemp ma hope o ka mālama ʻana a me ka spectrum infrared o HPMC i hoʻomākaukau ʻia mai ka hemp stalk cellulose.I waena o lākou, ʻo ka pūʻali absorption ikaika a ākea ma 3295 cm -1 ʻo ia ka puʻupuʻu absorption vibration o ka hui hydroxyl hui HPMC, ʻo ka absorption band ma 1250 ~ 1460 cm -1 ʻo ia ka absorption band o CH, CH2 a me CH3, a me ka absorption. ʻO ka pūʻali ma 1600 knm -1 ka puʻupuʻu absorption o ka wai ma ka polymer absorption band.ʻO ke kāʻei hoʻopalekana ma 1025cm -1 ka pūʻina absorption o C - O - C i loko o ka polymer.
2.3 Ka hoʻoholo ʻana i ka viscosity
E lawe i ka lāʻau cannabis stalk cellulose etera laʻana a hoʻohui iā ia i ka beaker e hoʻomākaukau ai i kahi hopena wai 2%, e hoʻoulu maikaʻi, e ana i kona viscosity a me ka viscosity paʻa me ka viscometer, a ana i ka viscosity awelika no 3 manawa.ʻO ka viscosity o ka cannabis stalk cellulose ether sample he 11.8 mPa·s.
2.4 Noi ka nui
2.4.1 Hoʻonohonoho slurry
Hoʻomākaukauʻia ka slurry i loko o 1000mL o ka slurry me ka hapa nui o 3.5%, hoʻouluulu like me ka mea hui, a laila hoʻokomoʻia i loko o ka waiʻauʻau a hoʻomehanaʻia i 95 ° C no 1 h.I ka manawa like, e hoʻomanaʻo e hoʻopaʻa maikaʻi ʻia ka ipu kuke pulp e pale i ka hoʻonui ʻana o ka slurry ma muli o ka hoʻoheheʻe ʻana o ka wai.
2.4.2 Slurry formulation pH, miscibility a me COD
E hoʻohui i ka hydroxypropyl methyl cellulose a me ka nui starch kikoʻī e hoʻomākaukau ai i ka slurry (1#~4#), a e hoʻohālikelike me ka slurry formula PVA (0#) e nānā i ka pH, miscibility a me COD.Ua hoʻohālikelike ʻia ka lole polyester-cotton i hui ʻia ʻo T/C65/3514.7 tex ma ka mīkini hoʻohālike ESS1000, a ua kālailai ʻia kāna hana nui.
Hiki ke ʻike ʻia ʻo ka homemade hemp stalk cellulose ether a me ka nui starch nui 3 # ʻo ia ka hoʻolālā nui maikaʻi loa: 25% hemp stalk cellulose ether, 65% starch i hoʻololi ʻia a me 10% FS-101.
Hoʻohālikelike ʻia nā ʻikepili nui a pau me ka ʻikepili sizing o ka nui PVA, e hōʻike ana i ka nui o ka hui ʻana o ka hydroxypropyl methylcellulose a me ka starch kikoʻī he maikaʻi ke hoʻokō ʻana;ʻoi aku ka pili o kona pH i ka neutral;hydroxypropyl methylcellulose a me ka mākiko kikoʻī Ua emi loa ka COD (17459.2 mg/L) o ka nui o ka starch i hui pū ʻia ma mua o ka nui o ka PVA (26448.0 mg/L), a ua maikaʻi ka hana o ka mālama ʻana i ke kaiapuni.
3. Ka hopena
ʻO ke kaʻina hana maikaʻi loa no ka hoʻomākaukau ʻana i ka hemp stalk cellulose ether-hydroxypropyl methylcellulose no ka hoʻonui ʻana penei: kahi reactor hoʻoulu ʻia kiʻekiʻe me ka wikiwiki o ka rotation o 240-350 r / min, kahi hapa nui o ka lye o 35%, a me kahi ratio hoʻoemi. ʻO ka alkali cellulose 2.4, ʻo ka mahana methylation he 75 ℃, a ʻo ka mahana hydroxypropylation he 50 ℃, mālama ʻia kēlā me kēia no 2 mau hola, ʻo ka nui o ka wai o ka methyl chloride a me ka propylene oxide he 7:3, vacuum, ʻo ke kaomi ʻana he 2.0 MPa, ʻO ka isopropanol ka diluent.
Ua hoʻohana ʻia ka Hemp stalk cellulose ether e hoʻololi i ka nui PVA no ka hoʻonui ʻana, a ʻo ka lakio nui maikaʻi loa: 25% hemp stalk cellulose ether, 65% starch i hoʻololi ʻia a me 10% FS-101.ʻO ka pH o ka slurry he 6.5 a me ka COD (17459.2 mg / L) he haʻahaʻa loa ia ma mua o ka PVA slurry (26448.0 mg / L), e hōʻike ana i ka hana maikaʻi o ka nohona.
Ua hoʻohana ʻia ka Hemp stalk cellulose ether no ka nui ʻana ma mua o ka nui o ka PVA i ka nui o ka polyester-cotton wili i hui ʻia T/C 65/3514.7tex.Ua like ka helu helu.ʻO ka hemp stalk cellulose ether a me ka starch i hoʻololi ʻia i hui pū ʻia e hiki ke hoʻololi i ka nui PVA.
Ka manawa hoʻouna: Feb-20-2023