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公开(公告)号：US20220289948A1
公开(公告)日：2022-09-15
申请号：US17695443
申请日：2022-03-15
IPC分类号： C08L1/28
摘要： A substantially homogeneous composition comprising cellulose nanocrystals (CNC) and carboxymethyl cellulose (CMC), wherein said CNC and CMC provide 85-95% of and 5-15% of total dry weight percentage of said CNC and CMC, respectively; a method of preparing a dried composition comprising CNC and CMC, and re-dispersing said dried composition into water to form a substantially homogeneous aqueous suspension without visible precipitate.
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公开(公告)号：US20160347661A1
公开(公告)日：2016-12-01
申请号：US15211804
申请日：2016-07-15
申请人： Purdue Research Foundation , The United States of America as Represented by the Secretary of Agriculture
发明人： Jeffrey Paul Youngblood , Pablo Daniel Zavattieri , Robert John Moon , William Jason Weiss , Yizheng Cao
CPC分类号： C04B24/383 , A61K6/0008 , A61K6/06 , C04B18/24 , C04B28/04 , C04B28/06 , C04B28/08 , C04B40/0067 , C04B2103/302 , C04B2111/00008 , C04B2111/70 , C09K8/467 , Y02W30/97 , A61K6/0023 , C08L1/08
摘要： The invention provides a cement paste composition comprising cement, cellulose nanocrystals, and optionally water. The cellulose nanocrystals can be present in an amount sufficient and effective to increase the flexural strength of cured cement prepared from the cement paste composition. The cellulose nanocrystals can also be present in an amount sufficient and effective to increase the workability of a cement paste prepared from the cement paste composition. The invention further provides a water reducing additive that reduces the amount of water required for desired workability of a cement composition. Use of the presence of the cellulose nanocrystals also results in an increased degree of hydration and cumulative heat evolution in comparison to a corresponding composition without the cellulose nanoparticles, thereby resulting in a higher total cure of the cement paste composition upon curing.
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公开(公告)号：US20230115147A1
公开(公告)日：2023-04-13
申请号：US17908845
申请日：2021-03-01
摘要： The present disclosure provides to a novel continuous processing method to prepare sheets comprising cellulose nanofibril (CNF) and carboxymethyl cellulose (CMC). Single screw extrusion was utilized to continuously process mechanically fibrillated cellulose nanofibrils (CNF) into sheets. Water-retention ability and stability of CNF suspensions containing different processing aids was assessed through centrifugation and zeta potential analysis. Subsequently, highly loaded pastes (up to ˜25 wt. % total solids content) containing the best performing processing aids (carboxymethyl cellulose (CMC), xanthan gum (XG), and anionic polyacrylamide (aPAM)) and CNF were prepared using a Brabender with Banbury mixer-head at a dry weight ratio of either 0.1 to 1 or 0.15 to 1, respectively. Validation of the mixing procedure proved that highly loaded CNF pastes can be processed in under 40 minutes, saving up to 40 days in preparation and drying time.
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公开(公告)号：US20160075601A1
公开(公告)日：2016-03-17
申请号：US14890408
申请日：2014-05-09
申请人： PURDUE RESEARCH FOUNDATION , THE UNITED STATES OF AMERICA as represented by THE SECRETTARY OF AGRICULTURE
发明人： Jeffrey Paul Youngblood , Pablo Daniel Zavattieri , Robert John Moon , William Jason Weiss , Yizheng Cao
CPC分类号： C04B24/383 , A61K6/0008 , A61K6/06 , C04B18/24 , C04B28/04 , C04B28/06 , C04B28/08 , C04B40/0067 , C04B2103/302 , C04B2111/00008 , C04B2111/70 , C09K8/467 , Y02W30/97 , A61K6/0023 , C08L1/08
摘要： The invention provides a cement paste composition comprising cement, cellulose nanocrystals, and optionally water. The cellulose nanocrystals can be present in an amount sufficient and effective to increase the flexural strength of cured cement prepared from the cement paste composition. The cellulose nanocrystals can also be present in an amount sufficient and effective to increase the workability of a cement paste prepared from the cement paste composition. The invention further provides a water reducing additive that reduces the amount of water required for desired workability of a cement composition. Use of the presence of the cellulose nanocrystals also results in an increased degree of hydration and cumulative heat evolution in comparison to a corresponding composition without the cellulose nanoparticles, thereby resulting in a higher total cure of the cement paste composition upon curing.
摘要翻译： 本发明提供一种水泥浆组合物，其包含水泥，纤维素纳米晶体和任选的水。 纤维素纳米晶体可以以足以有效提高由水泥浆组合物制备的固化水泥的弯曲强度的量存在。 纤维素纳米晶体还可以以足以有效地提高由水泥浆组合物制备的水泥糊的可加工性的量存在。 本发明还提供一种减少水泥组合物所需的可加工性所需的水量的减水添加剂。 与没有纤维素纳米颗粒的相应组合物相比，使用纤维素纳米晶体的存在也导致增加的水合程度和累积放热，从而导致固化时水泥浆组合物的总固化更高。
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